/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 19:40:39,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 19:40:39,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 19:40:39,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 19:40:39,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 19:40:39,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 19:40:39,775 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 19:40:39,791 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 19:40:39,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 19:40:39,800 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 19:40:39,802 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 19:40:39,806 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 19:40:39,807 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 19:40:39,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 19:40:39,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 19:40:39,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 19:40:39,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 19:40:39,831 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 19:40:39,834 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 19:40:39,841 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 19:40:39,846 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 19:40:39,851 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 19:40:39,857 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 19:40:39,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 19:40:39,864 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 19:40:39,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 19:40:39,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 19:40:39,888 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 19:40:39,889 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 19:40:39,926 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 19:40:39,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 19:40:39,928 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 19:40:39,929 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 19:40:39,929 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 19:40:39,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 19:40:39,930 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 19:40:39,930 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 19:40:39,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 19:40:39,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 19:40:39,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 19:40:39,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 19:40:39,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 19:40:39,931 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 19:40:39,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 19:40:39,931 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 19:40:39,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 19:40:39,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 19:40:39,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 19:40:39,932 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 19:40:39,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 19:40:39,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:40:39,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 19:40:39,936 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 19:40:39,936 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 19:40:39,936 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 19:40:39,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:39,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 19:40:39,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 19:40:39,937 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 19:40:40,354 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 19:40:40,375 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 19:40:40,381 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 19:40:40,383 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 19:40:40,384 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 19:40:40,385 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2020-07-21 19:40:40,511 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f543b0460/0314224de8a74632bd0d04951894238b/FLAGeb34e805e [2020-07-21 19:40:41,173 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 19:40:41,177 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2020-07-21 19:40:41,197 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f543b0460/0314224de8a74632bd0d04951894238b/FLAGeb34e805e [2020-07-21 19:40:41,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f543b0460/0314224de8a74632bd0d04951894238b [2020-07-21 19:40:41,506 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 19:40:41,510 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 19:40:41,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 19:40:41,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 19:40:41,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 19:40:41,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:40:41" (1/1) ... [2020-07-21 19:40:41,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df9bfd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:40:41, skipping insertion in model container [2020-07-21 19:40:41,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 07:40:41" (1/1) ... [2020-07-21 19:40:41,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 19:40:41,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 19:40:41,784 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:40:41,791 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 19:40:41,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 19:40:41,827 INFO L208 MainTranslator]: Completed translation [2020-07-21 19:40:41,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:40:41 WrapperNode [2020-07-21 19:40:41,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 19:40:41,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 19:40:41,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 19:40:41,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 19:40:41,844 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:40:41" (1/1) ... [2020-07-21 19:40:41,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:40:41" (1/1) ... [2020-07-21 19:40:41,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:40:41" (1/1) ... [2020-07-21 19:40:41,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:40:41" (1/1) ... [2020-07-21 19:40:41,972 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:40:41" (1/1) ... [2020-07-21 19:40:41,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:40:41" (1/1) ... [2020-07-21 19:40:41,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:40:41" (1/1) ... [2020-07-21 19:40:41,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 19:40:41,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 19:40:41,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 19:40:41,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 19:40:41,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:40:41" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 19:40:42,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 19:40:42,097 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 19:40:42,097 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-21 19:40:42,097 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-21 19:40:42,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 19:40:42,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 19:40:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 19:40:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-21 19:40:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-21 19:40:42,098 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 19:40:42,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 19:40:42,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 19:40:42,384 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 19:40:42,385 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-21 19:40:42,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:40:42 BoogieIcfgContainer [2020-07-21 19:40:42,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 19:40:42,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 19:40:42,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 19:40:42,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 19:40:42,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 07:40:41" (1/3) ... [2020-07-21 19:40:42,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6442a77c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:40:42, skipping insertion in model container [2020-07-21 19:40:42,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 07:40:41" (2/3) ... [2020-07-21 19:40:42,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6442a77c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 07:40:42, skipping insertion in model container [2020-07-21 19:40:42,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 07:40:42" (3/3) ... [2020-07-21 19:40:42,413 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.c [2020-07-21 19:40:42,443 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 19:40:42,462 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 19:40:42,494 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 19:40:42,556 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 19:40:42,557 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 19:40:42,557 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 19:40:42,557 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 19:40:42,557 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 19:40:42,558 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 19:40:42,558 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 19:40:42,558 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 19:40:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 19:40:42,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-21 19:40:42,600 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:40:42,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:40:42,603 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:40:42,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:40:42,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-21 19:40:42,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:40:42,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69422900] [2020-07-21 19:40:42,622 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:42,709 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:40:42,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:40:42,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:40:42,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:40:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:40:42,837 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:40:42,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69422900] [2020-07-21 19:40:42,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:40:42,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:40:42,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124235695] [2020-07-21 19:40:42,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:40:42,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:40:42,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:40:42,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:40:42,878 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-21 19:40:43,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:40:43,056 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-21 19:40:43,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:40:43,059 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-21 19:40:43,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:40:43,076 INFO L225 Difference]: With dead ends: 44 [2020-07-21 19:40:43,077 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 19:40:43,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:40:43,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 19:40:43,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 19:40:43,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 19:40:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 19:40:43,162 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-21 19:40:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:40:43,163 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 19:40:43,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:40:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 19:40:43,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-21 19:40:43,169 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:40:43,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:40:43,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:43,374 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:40:43,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:40:43,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-21 19:40:43,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:40:43,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639423509] [2020-07-21 19:40:43,376 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:43,418 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 19:40:43,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:40:43,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-21 19:40:43,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:40:43,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 19:40:43,488 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 19:40:43,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639423509] [2020-07-21 19:40:43,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 19:40:43,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 19:40:43,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577234593] [2020-07-21 19:40:43,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 19:40:43,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:40:43,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 19:40:43,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 19:40:43,495 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-21 19:40:43,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:40:43,600 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-21 19:40:43,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 19:40:43,602 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-21 19:40:43,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:40:43,604 INFO L225 Difference]: With dead ends: 36 [2020-07-21 19:40:43,605 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 19:40:43,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 19:40:43,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 19:40:43,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-21 19:40:43,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 19:40:43,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-21 19:40:43,621 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-21 19:40:43,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:40:43,622 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-21 19:40:43,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 19:40:43,622 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-21 19:40:43,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 19:40:43,624 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:40:43,625 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:40:43,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:43,842 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:40:43,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:40:43,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-21 19:40:43,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:40:43,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102087770] [2020-07-21 19:40:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:43,887 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:40:43,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:40:43,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:40:43,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:40:43,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:40:43,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:40:44,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:44,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:40:44,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102087770] [2020-07-21 19:40:44,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:40:44,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 19:40:44,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017891903] [2020-07-21 19:40:44,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 19:40:44,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:40:44,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 19:40:44,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 19:40:44,304 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-21 19:40:44,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:40:44,553 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-21 19:40:44,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:40:44,556 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-21 19:40:44,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:40:44,561 INFO L225 Difference]: With dead ends: 41 [2020-07-21 19:40:44,562 INFO L226 Difference]: Without dead ends: 37 [2020-07-21 19:40:44,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:40:44,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-21 19:40:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-21 19:40:44,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 19:40:44,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 19:40:44,607 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-21 19:40:44,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:40:44,608 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 19:40:44,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 19:40:44,608 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 19:40:44,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 19:40:44,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:40:44,611 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:40:44,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:44,829 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:40:44,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:40:44,830 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-21 19:40:44,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:40:44,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529973193] [2020-07-21 19:40:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:44,884 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:40:44,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:40:44,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 19:40:44,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:40:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:40:44,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:40:45,145 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:45,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 19:40:45,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529973193] [2020-07-21 19:40:45,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:40:45,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-21 19:40:45,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432690355] [2020-07-21 19:40:45,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-21 19:40:45,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:40:45,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-21 19:40:45,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-21 19:40:45,197 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-21 19:40:45,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:40:45,383 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-21 19:40:45,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 19:40:45,384 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-21 19:40:45,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:40:45,387 INFO L225 Difference]: With dead ends: 46 [2020-07-21 19:40:45,388 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 19:40:45,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:40:45,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 19:40:45,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 19:40:45,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 19:40:45,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-21 19:40:45,401 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-21 19:40:45,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:40:45,402 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-21 19:40:45,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-21 19:40:45,402 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-21 19:40:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-21 19:40:45,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:40:45,405 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:40:45,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:45,619 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:40:45,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:40:45,620 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-21 19:40:45,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:40:45,621 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108776831] [2020-07-21 19:40:45,622 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:45,665 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:40:45,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:40:45,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:40:45,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:40:45,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-21 19:40:45,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:40:46,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:46,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:46,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 19:40:46,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108776831] [2020-07-21 19:40:46,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:40:46,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 19:40:46,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716286882] [2020-07-21 19:40:46,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 19:40:46,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:40:46,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 19:40:46,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:40:46,251 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-21 19:40:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:40:46,495 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-21 19:40:46,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:40:46,496 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-21 19:40:46,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:40:46,500 INFO L225 Difference]: With dead ends: 51 [2020-07-21 19:40:46,504 INFO L226 Difference]: Without dead ends: 47 [2020-07-21 19:40:46,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:40:46,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-21 19:40:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-21 19:40:46,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 19:40:46,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 19:40:46,529 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-21 19:40:46,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:40:46,530 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 19:40:46,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 19:40:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 19:40:46,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-21 19:40:46,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:40:46,533 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:40:46,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:46,740 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:40:46,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:40:46,741 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-21 19:40:46,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:40:46,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239964730] [2020-07-21 19:40:46,743 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:46,782 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:40:46,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:40:46,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-21 19:40:46,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:40:46,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-21 19:40:46,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:40:47,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:47,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:47,156 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-21 19:40:47,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239964730] [2020-07-21 19:40:47,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:40:47,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-21 19:40:47,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993212409] [2020-07-21 19:40:47,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-21 19:40:47,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:40:47,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-21 19:40:47,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-21 19:40:47,207 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-21 19:40:47,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:40:47,458 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-21 19:40:47,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 19:40:47,459 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-21 19:40:47,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:40:47,461 INFO L225 Difference]: With dead ends: 56 [2020-07-21 19:40:47,462 INFO L226 Difference]: Without dead ends: 52 [2020-07-21 19:40:47,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:40:47,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-21 19:40:47,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-21 19:40:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-21 19:40:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-21 19:40:47,478 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-21 19:40:47,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:40:47,479 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-21 19:40:47,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-21 19:40:47,480 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-21 19:40:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-21 19:40:47,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:40:47,483 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:40:47,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:47,699 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:40:47,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:40:47,701 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-21 19:40:47,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:40:47,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73616148] [2020-07-21 19:40:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:47,769 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:40:47,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:40:47,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:40:47,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:40:47,876 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-21 19:40:47,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:40:48,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:48,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:48,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:48,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 19:40:48,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73616148] [2020-07-21 19:40:48,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:40:48,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 19:40:48,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139709241] [2020-07-21 19:40:48,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 19:40:48,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:40:48,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 19:40:48,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:40:48,568 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-21 19:40:48,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:40:48,879 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-21 19:40:48,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:40:48,880 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-21 19:40:48,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:40:48,885 INFO L225 Difference]: With dead ends: 61 [2020-07-21 19:40:48,886 INFO L226 Difference]: Without dead ends: 57 [2020-07-21 19:40:48,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:40:48,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-21 19:40:48,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-21 19:40:48,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 19:40:48,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 19:40:48,915 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-21 19:40:48,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:40:48,916 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 19:40:48,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 19:40:48,918 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 19:40:48,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-21 19:40:48,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:40:48,923 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:40:49,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:49,131 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:40:49,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:40:49,132 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-21 19:40:49,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:40:49,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268745330] [2020-07-21 19:40:49,133 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:49,181 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:40:49,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:40:49,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 19:40:49,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:40:49,291 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-21 19:40:49,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:40:49,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:49,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:49,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:49,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:49,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-21 19:40:49,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268745330] [2020-07-21 19:40:49,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:40:49,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-21 19:40:49,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434556654] [2020-07-21 19:40:49,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-21 19:40:49,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:40:49,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-21 19:40:49,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-21 19:40:49,914 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-21 19:40:50,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:40:50,171 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-21 19:40:50,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 19:40:50,172 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-21 19:40:50,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:40:50,174 INFO L225 Difference]: With dead ends: 66 [2020-07-21 19:40:50,175 INFO L226 Difference]: Without dead ends: 62 [2020-07-21 19:40:50,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:40:50,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-21 19:40:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-21 19:40:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-21 19:40:50,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-21 19:40:50,190 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-21 19:40:50,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:40:50,191 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-21 19:40:50,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-21 19:40:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-21 19:40:50,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-21 19:40:50,194 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:40:50,194 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:40:50,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:50,411 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:40:50,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:40:50,412 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-21 19:40:50,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:40:50,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219027948] [2020-07-21 19:40:50,413 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:50,490 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:40:50,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:40:50,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:40:50,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:40:50,604 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-21 19:40:50,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:40:51,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:51,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:51,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:51,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:51,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:51,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:51,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-21 19:40:51,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219027948] [2020-07-21 19:40:51,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:40:51,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 19:40:51,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054817552] [2020-07-21 19:40:51,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 19:40:51,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:40:51,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 19:40:51,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 19:40:51,688 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-21 19:40:52,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:40:52,026 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-21 19:40:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:40:52,027 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-21 19:40:52,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:40:52,030 INFO L225 Difference]: With dead ends: 71 [2020-07-21 19:40:52,030 INFO L226 Difference]: Without dead ends: 67 [2020-07-21 19:40:52,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:40:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-21 19:40:52,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-21 19:40:52,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 19:40:52,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 19:40:52,047 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-21 19:40:52,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:40:52,048 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 19:40:52,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 19:40:52,049 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 19:40:52,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-21 19:40:52,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:40:52,051 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:40:52,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:52,257 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:40:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:40:52,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-21 19:40:52,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:40:52,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314252800] [2020-07-21 19:40:52,259 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:52,337 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:40:52,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:40:52,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:40:52,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:40:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-21 19:40:52,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:40:53,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:53,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:53,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:53,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:53,557 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-21 19:40:53,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314252800] [2020-07-21 19:40:53,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:40:53,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-21 19:40:53,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793874877] [2020-07-21 19:40:53,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-21 19:40:53,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:40:53,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-21 19:40:53,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-21 19:40:53,563 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-21 19:40:53,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:40:53,856 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-21 19:40:53,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:40:53,857 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-21 19:40:53,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:40:53,860 INFO L225 Difference]: With dead ends: 76 [2020-07-21 19:40:53,860 INFO L226 Difference]: Without dead ends: 72 [2020-07-21 19:40:53,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:40:53,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-21 19:40:53,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-21 19:40:53,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-21 19:40:53,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-21 19:40:53,897 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-21 19:40:53,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:40:53,898 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-21 19:40:53,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-21 19:40:53,898 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-21 19:40:53,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-21 19:40:53,902 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:40:53,903 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:40:54,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:54,118 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:40:54,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:40:54,119 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-21 19:40:54,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:40:54,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823972254] [2020-07-21 19:40:54,120 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:54,243 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:40:54,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:40:54,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:40:54,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:40:54,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-21 19:40:54,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:40:55,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:55,919 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:55,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:56,091 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:56,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:56,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:56,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:56,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:56,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-21 19:40:56,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823972254] [2020-07-21 19:40:56,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:40:56,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 19:40:56,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220236935] [2020-07-21 19:40:56,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 19:40:56,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:40:56,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 19:40:56,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:40:56,333 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-21 19:40:56,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:40:56,749 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-21 19:40:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:40:56,750 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-21 19:40:56,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:40:56,760 INFO L225 Difference]: With dead ends: 81 [2020-07-21 19:40:56,760 INFO L226 Difference]: Without dead ends: 77 [2020-07-21 19:40:56,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 19:40:56,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-21 19:40:56,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-21 19:40:56,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 19:40:56,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 19:40:56,800 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-21 19:40:56,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:40:56,802 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 19:40:56,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 19:40:56,802 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 19:40:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-21 19:40:56,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:40:56,810 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:40:57,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:57,012 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:40:57,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:40:57,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-21 19:40:57,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:40:57,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207809730] [2020-07-21 19:40:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:57,109 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:40:57,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:40:57,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:40:57,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:40:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-21 19:40:57,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:40:58,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:58,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:58,434 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:58,591 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:58,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:58,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:58,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:40:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-21 19:40:58,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207809730] [2020-07-21 19:40:58,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:40:58,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-21 19:40:58,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141297497] [2020-07-21 19:40:58,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-21 19:40:58,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:40:58,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-21 19:40:58,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-21 19:40:58,808 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-21 19:40:59,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:40:59,215 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-21 19:40:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:40:59,217 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-21 19:40:59,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:40:59,220 INFO L225 Difference]: With dead ends: 86 [2020-07-21 19:40:59,220 INFO L226 Difference]: Without dead ends: 82 [2020-07-21 19:40:59,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-21 19:40:59,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-21 19:40:59,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-21 19:40:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-21 19:40:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-21 19:40:59,235 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-21 19:40:59,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:40:59,236 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-21 19:40:59,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-21 19:40:59,236 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-21 19:40:59,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-21 19:40:59,239 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:40:59,240 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:40:59,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:59,452 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:40:59,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:40:59,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-21 19:40:59,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:40:59,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080587220] [2020-07-21 19:40:59,454 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:40:59,582 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:40:59,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:40:59,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:40:59,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:40:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-21 19:40:59,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:41:01,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:01,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:01,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:01,861 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:01,862 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:02,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:02,027 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:02,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:02,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:02,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:02,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-21 19:41:02,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080587220] [2020-07-21 19:41:02,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:41:02,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 19:41:02,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938847167] [2020-07-21 19:41:02,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 19:41:02,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:41:02,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 19:41:02,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:41:02,274 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-21 19:41:02,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:41:02,789 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-21 19:41:02,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:41:02,790 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-21 19:41:02,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:41:02,794 INFO L225 Difference]: With dead ends: 91 [2020-07-21 19:41:02,794 INFO L226 Difference]: Without dead ends: 87 [2020-07-21 19:41:02,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 19:41:02,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-21 19:41:02,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-21 19:41:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 19:41:02,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 19:41:02,810 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-21 19:41:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:41:02,811 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 19:41:02,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 19:41:02,812 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 19:41:02,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-21 19:41:02,815 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:41:02,815 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:41:03,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:03,030 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:41:03,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:41:03,031 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-21 19:41:03,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:41:03,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128840911] [2020-07-21 19:41:03,033 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:03,176 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:41:03,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:41:03,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:41:03,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:41:03,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-21 19:41:03,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:41:05,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:05,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:05,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:05,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:05,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:06,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:06,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:06,129 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:06,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-21 19:41:06,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128840911] [2020-07-21 19:41:06,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:41:06,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:41:06,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003001226] [2020-07-21 19:41:06,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:41:06,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:41:06,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:41:06,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:41:06,235 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 19 states. [2020-07-21 19:41:06,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:41:06,640 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-21 19:41:06,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:41:06,641 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 201 [2020-07-21 19:41:06,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:41:06,644 INFO L225 Difference]: With dead ends: 96 [2020-07-21 19:41:06,645 INFO L226 Difference]: Without dead ends: 92 [2020-07-21 19:41:06,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:41:06,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-21 19:41:06,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-21 19:41:06,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-21 19:41:06,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-21 19:41:06,674 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-21 19:41:06,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:41:06,675 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-21 19:41:06,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:41:06,676 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-21 19:41:06,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-21 19:41:06,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:41:06,685 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:41:06,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:06,900 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:41:06,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:41:06,901 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-21 19:41:06,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:41:06,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649382567] [2020-07-21 19:41:06,901 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:07,116 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:41:07,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:41:07,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:41:07,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:41:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-21 19:41:07,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:41:09,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:09,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:10,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:10,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:10,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:10,956 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:11,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:11,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:11,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:11,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:11,557 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:11,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-21 19:41:11,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649382567] [2020-07-21 19:41:11,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:41:11,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:41:11,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015700049] [2020-07-21 19:41:11,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:41:11,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:41:11,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:41:11,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:41:11,779 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 21 states. [2020-07-21 19:41:12,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:41:12,419 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-21 19:41:12,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:41:12,421 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 351 [2020-07-21 19:41:12,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:41:12,425 INFO L225 Difference]: With dead ends: 101 [2020-07-21 19:41:12,425 INFO L226 Difference]: Without dead ends: 97 [2020-07-21 19:41:12,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:41:12,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-21 19:41:12,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-21 19:41:12,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-21 19:41:12,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-21 19:41:12,445 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-21 19:41:12,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:41:12,446 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-21 19:41:12,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:41:12,446 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-21 19:41:12,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-07-21 19:41:12,449 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:41:12,450 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 19, 17, 17, 13, 13, 13, 13, 13, 13, 13, 13, 11, 8, 8, 8, 8, 8, 8, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:41:12,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:12,667 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:41:12,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:41:12,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1494010988, now seen corresponding path program 3 times [2020-07-21 19:41:12,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:41:12,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186275400] [2020-07-21 19:41:12,669 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:12,923 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:41:12,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:41:12,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:41:12,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:41:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 533 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-21 19:41:13,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:41:14,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:14,849 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:15,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:15,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:15,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:15,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:16,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:16,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:16,501 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:16,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 554 refuted. 0 times theorem prover too weak. 1839 trivial. 0 not checked. [2020-07-21 19:41:16,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186275400] [2020-07-21 19:41:16,748 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:41:16,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:41:16,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518746310] [2020-07-21 19:41:16,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:41:16,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:41:16,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:41:16,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:41:16,752 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 19 states. [2020-07-21 19:41:17,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:41:17,291 INFO L93 Difference]: Finished difference Result 129 states and 362 transitions. [2020-07-21 19:41:17,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:41:17,295 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 297 [2020-07-21 19:41:17,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:41:17,299 INFO L225 Difference]: With dead ends: 129 [2020-07-21 19:41:17,300 INFO L226 Difference]: Without dead ends: 125 [2020-07-21 19:41:17,302 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 562 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:41:17,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-21 19:41:17,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 67. [2020-07-21 19:41:17,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-21 19:41:17,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 120 transitions. [2020-07-21 19:41:17,322 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 120 transitions. Word has length 297 [2020-07-21 19:41:17,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:41:17,323 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 120 transitions. [2020-07-21 19:41:17,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:41:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 120 transitions. [2020-07-21 19:41:17,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-21 19:41:17,327 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:41:17,328 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 25, 25, 25, 23, 17, 17, 17, 17, 17, 17, 17, 12, 12, 12, 12, 12, 12, 12, 11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:41:17,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:17,542 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:41:17,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:41:17,542 INFO L82 PathProgramCache]: Analyzing trace with hash -948476032, now seen corresponding path program 1 times [2020-07-21 19:41:17,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:41:17,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288448137] [2020-07-21 19:41:17,543 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:17,835 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:41:17,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:41:17,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:41:17,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:41:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 707 refuted. 0 times theorem prover too weak. 3930 trivial. 0 not checked. [2020-07-21 19:41:18,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:41:19,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:20,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:20,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:20,666 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:20,722 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:20,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 723 refuted. 0 times theorem prover too weak. 3914 trivial. 0 not checked. [2020-07-21 19:41:20,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288448137] [2020-07-21 19:41:20,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:41:20,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:41:20,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661640396] [2020-07-21 19:41:20,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:41:20,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:41:20,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:41:20,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:41:20,918 INFO L87 Difference]: Start difference. First operand 67 states and 120 transitions. Second operand 17 states. [2020-07-21 19:41:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:41:21,364 INFO L93 Difference]: Finished difference Result 139 states and 413 transitions. [2020-07-21 19:41:21,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:41:21,365 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 409 [2020-07-21 19:41:21,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:41:21,371 INFO L225 Difference]: With dead ends: 139 [2020-07-21 19:41:21,371 INFO L226 Difference]: Without dead ends: 135 [2020-07-21 19:41:21,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 790 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:41:21,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-21 19:41:21,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 69. [2020-07-21 19:41:21,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-21 19:41:21,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 127 transitions. [2020-07-21 19:41:21,396 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 127 transitions. Word has length 409 [2020-07-21 19:41:21,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:41:21,397 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 127 transitions. [2020-07-21 19:41:21,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:41:21,397 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 127 transitions. [2020-07-21 19:41:21,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2020-07-21 19:41:21,402 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:41:21,402 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 33, 33, 32, 30, 22, 22, 22, 22, 22, 22, 22, 16, 16, 16, 16, 16, 16, 16, 14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:41:21,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:21,616 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:41:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:41:21,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1385064961, now seen corresponding path program 1 times [2020-07-21 19:41:21,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:41:21,618 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903932039] [2020-07-21 19:41:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:21,967 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:41:21,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:41:21,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:41:21,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:41:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 323 proven. 1216 refuted. 0 times theorem prover too weak. 6692 trivial. 0 not checked. [2020-07-21 19:41:22,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:41:24,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:26,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:26,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:27,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:27,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:27,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:27,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:27,531 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:27,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:27,832 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 327 proven. 1245 refuted. 0 times theorem prover too weak. 6659 trivial. 0 not checked. [2020-07-21 19:41:27,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903932039] [2020-07-21 19:41:27,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:41:27,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:41:27,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870191036] [2020-07-21 19:41:27,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:41:27,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:41:27,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:41:27,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:41:27,836 INFO L87 Difference]: Start difference. First operand 69 states and 127 transitions. Second operand 21 states. [2020-07-21 19:41:28,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:41:28,776 INFO L93 Difference]: Finished difference Result 166 states and 566 transitions. [2020-07-21 19:41:28,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:41:28,778 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 531 [2020-07-21 19:41:28,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:41:28,781 INFO L225 Difference]: With dead ends: 166 [2020-07-21 19:41:28,782 INFO L226 Difference]: Without dead ends: 88 [2020-07-21 19:41:28,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 1025 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:41:28,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-21 19:41:28,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-07-21 19:41:28,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-21 19:41:28,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 146 transitions. [2020-07-21 19:41:28,803 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 146 transitions. Word has length 531 [2020-07-21 19:41:28,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:41:28,804 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 146 transitions. [2020-07-21 19:41:28,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:41:28,805 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 146 transitions. [2020-07-21 19:41:28,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-07-21 19:41:28,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:41:28,811 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 25, 24, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:41:29,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:29,026 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:41:29,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:41:29,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1214630406, now seen corresponding path program 2 times [2020-07-21 19:41:29,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:41:29,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388147409] [2020-07-21 19:41:29,027 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:29,368 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:41:29,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:41:29,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:41:29,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:41:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 232 proven. 884 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2020-07-21 19:41:29,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:41:31,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:31,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:32,231 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:32,652 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:32,653 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:32,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:33,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:33,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:33,157 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:33,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 232 proven. 905 refuted. 0 times theorem prover too weak. 4819 trivial. 0 not checked. [2020-07-21 19:41:33,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388147409] [2020-07-21 19:41:33,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:41:33,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:41:33,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679356306] [2020-07-21 19:41:33,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:41:33,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:41:33,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:41:33,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:41:33,385 INFO L87 Difference]: Start difference. First operand 88 states and 146 transitions. Second operand 19 states. [2020-07-21 19:41:33,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:41:33,975 INFO L93 Difference]: Finished difference Result 167 states and 414 transitions. [2020-07-21 19:41:33,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:41:33,976 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 458 [2020-07-21 19:41:33,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:41:33,981 INFO L225 Difference]: With dead ends: 167 [2020-07-21 19:41:33,982 INFO L226 Difference]: Without dead ends: 153 [2020-07-21 19:41:33,984 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 883 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:41:33,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-21 19:41:34,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 94. [2020-07-21 19:41:34,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-21 19:41:34,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 160 transitions. [2020-07-21 19:41:34,006 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 160 transitions. Word has length 458 [2020-07-21 19:41:34,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:41:34,007 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 160 transitions. [2020-07-21 19:41:34,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:41:34,007 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 160 transitions. [2020-07-21 19:41:34,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2020-07-21 19:41:34,011 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:41:34,012 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 25, 25, 24, 20, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:41:34,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:34,227 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:41:34,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:41:34,227 INFO L82 PathProgramCache]: Analyzing trace with hash 605039004, now seen corresponding path program 3 times [2020-07-21 19:41:34,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:41:34,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953447889] [2020-07-21 19:41:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:34,549 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:41:34,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:41:34,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:41:34,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:41:34,786 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 290 proven. 753 refuted. 0 times theorem prover too weak. 3047 trivial. 0 not checked. [2020-07-21 19:41:34,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:41:37,481 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:37,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:38,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:38,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:38,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:38,837 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:39,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:39,140 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:39,391 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:39,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:39,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:39,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:39,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:39,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:39,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4090 backedges. 292 proven. 784 refuted. 0 times theorem prover too weak. 3014 trivial. 0 not checked. [2020-07-21 19:41:39,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953447889] [2020-07-21 19:41:39,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:41:39,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:41:39,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026951457] [2020-07-21 19:41:39,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:41:39,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:41:39,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:41:39,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:41:39,902 INFO L87 Difference]: Start difference. First operand 94 states and 160 transitions. Second operand 21 states. [2020-07-21 19:41:40,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:41:40,735 INFO L93 Difference]: Finished difference Result 191 states and 508 transitions. [2020-07-21 19:41:40,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:41:40,737 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 381 [2020-07-21 19:41:40,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:41:40,740 INFO L225 Difference]: With dead ends: 191 [2020-07-21 19:41:40,741 INFO L226 Difference]: Without dead ends: 105 [2020-07-21 19:41:40,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 769 GetRequests, 725 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:41:40,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-21 19:41:40,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-07-21 19:41:40,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-21 19:41:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 171 transitions. [2020-07-21 19:41:40,759 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 171 transitions. Word has length 381 [2020-07-21 19:41:40,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:41:40,760 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 171 transitions. [2020-07-21 19:41:40,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:41:40,760 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 171 transitions. [2020-07-21 19:41:40,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-21 19:41:40,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:41:40,765 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 29, 29, 27, 24, 17, 17, 17, 17, 17, 17, 17, 14, 14, 14, 14, 14, 14, 14, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:41:40,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:40,980 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:41:40,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:41:40,984 INFO L82 PathProgramCache]: Analyzing trace with hash 878417150, now seen corresponding path program 4 times [2020-07-21 19:41:40,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:41:40,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610399578] [2020-07-21 19:41:40,986 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:41,365 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:41:41,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:41:41,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:41:41,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:41:41,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5403 backedges. 196 proven. 740 refuted. 0 times theorem prover too weak. 4467 trivial. 0 not checked. [2020-07-21 19:41:41,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:41:43,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:43,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:44,123 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:44,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:44,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:44,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:44,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:44,589 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:44,696 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:44,858 INFO L134 CoverageAnalysis]: Checked inductivity of 5403 backedges. 196 proven. 756 refuted. 0 times theorem prover too weak. 4451 trivial. 0 not checked. [2020-07-21 19:41:44,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610399578] [2020-07-21 19:41:44,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:41:44,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:41:44,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972694304] [2020-07-21 19:41:44,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:41:44,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:41:44,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:41:44,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:41:44,862 INFO L87 Difference]: Start difference. First operand 99 states and 171 transitions. Second operand 17 states. [2020-07-21 19:41:45,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:41:45,301 INFO L93 Difference]: Finished difference Result 178 states and 428 transitions. [2020-07-21 19:41:45,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:41:45,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 436 [2020-07-21 19:41:45,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:41:45,308 INFO L225 Difference]: With dead ends: 178 [2020-07-21 19:41:45,308 INFO L226 Difference]: Without dead ends: 163 [2020-07-21 19:41:45,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 843 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:41:45,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-21 19:41:45,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 106. [2020-07-21 19:41:45,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-21 19:41:45,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 192 transitions. [2020-07-21 19:41:45,332 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 192 transitions. Word has length 436 [2020-07-21 19:41:45,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:41:45,332 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 192 transitions. [2020-07-21 19:41:45,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:41:45,333 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 192 transitions. [2020-07-21 19:41:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-07-21 19:41:45,338 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:41:45,338 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 25, 22, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:41:45,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:45,551 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:41:45,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:41:45,552 INFO L82 PathProgramCache]: Analyzing trace with hash -421949250, now seen corresponding path program 5 times [2020-07-21 19:41:45,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:41:45,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823167553] [2020-07-21 19:41:45,553 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:45,943 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:41:45,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:41:45,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:41:45,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:41:46,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5283 backedges. 221 proven. 829 refuted. 0 times theorem prover too weak. 4233 trivial. 0 not checked. [2020-07-21 19:41:46,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:41:48,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:48,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:49,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:49,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:49,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:49,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:49,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:50,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:50,069 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:50,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5283 backedges. 223 proven. 848 refuted. 0 times theorem prover too weak. 4212 trivial. 0 not checked. [2020-07-21 19:41:50,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823167553] [2020-07-21 19:41:50,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:41:50,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:41:50,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106271147] [2020-07-21 19:41:50,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:41:50,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:41:50,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:41:50,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:41:50,318 INFO L87 Difference]: Start difference. First operand 106 states and 192 transitions. Second operand 19 states. [2020-07-21 19:41:50,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:41:50,866 INFO L93 Difference]: Finished difference Result 172 states and 408 transitions. [2020-07-21 19:41:50,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:41:50,870 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 432 [2020-07-21 19:41:50,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:41:50,878 INFO L225 Difference]: With dead ends: 172 [2020-07-21 19:41:50,878 INFO L226 Difference]: Without dead ends: 157 [2020-07-21 19:41:50,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 831 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:41:50,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-21 19:41:50,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 109. [2020-07-21 19:41:50,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-21 19:41:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-21 19:41:50,913 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 432 [2020-07-21 19:41:50,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:41:50,914 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-21 19:41:50,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:41:50,914 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-21 19:41:50,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-07-21 19:41:50,919 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:41:50,919 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 25, 22, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:41:51,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:51,133 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:41:51,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:41:51,134 INFO L82 PathProgramCache]: Analyzing trace with hash 962719115, now seen corresponding path program 6 times [2020-07-21 19:41:51,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:41:51,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750942800] [2020-07-21 19:41:51,134 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:51,528 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:41:51,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:41:51,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:41:51,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:41:51,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4971 backedges. 231 proven. 642 refuted. 0 times theorem prover too weak. 4098 trivial. 0 not checked. [2020-07-21 19:41:51,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:41:53,613 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:54,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:54,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:54,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:54,643 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:54,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:54,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:54,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:41:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4971 backedges. 231 proven. 656 refuted. 0 times theorem prover too weak. 4084 trivial. 0 not checked. [2020-07-21 19:41:54,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750942800] [2020-07-21 19:41:54,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:41:54,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:41:54,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146034570] [2020-07-21 19:41:54,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:41:54,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:41:54,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:41:54,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:41:54,954 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-21 19:41:55,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:41:55,433 INFO L93 Difference]: Finished difference Result 190 states and 442 transitions. [2020-07-21 19:41:55,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:41:55,436 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 420 [2020-07-21 19:41:55,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:41:55,441 INFO L225 Difference]: With dead ends: 190 [2020-07-21 19:41:55,441 INFO L226 Difference]: Without dead ends: 178 [2020-07-21 19:41:55,444 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 811 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:41:55,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-21 19:41:55,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 109. [2020-07-21 19:41:55,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-21 19:41:55,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-21 19:41:55,468 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 420 [2020-07-21 19:41:55,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:41:55,469 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-21 19:41:55,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:41:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-21 19:41:55,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 19:41:55,475 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:41:55,476 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 30, 30, 28, 26, 18, 18, 18, 18, 18, 18, 18, 15, 15, 15, 15, 15, 15, 15, 13, 9, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:41:55,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:55,691 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:41:55,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:41:55,692 INFO L82 PathProgramCache]: Analyzing trace with hash -73058712, now seen corresponding path program 7 times [2020-07-21 19:41:55,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:41:55,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491603371] [2020-07-21 19:41:55,693 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:41:56,153 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:41:56,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:41:56,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:41:56,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:41:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 454 proven. 845 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2020-07-21 19:41:56,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:41:59,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:00,002 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:00,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:00,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:00,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:00,934 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:00,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:01,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:01,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:01,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:01,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:01,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6139 backedges. 456 proven. 876 refuted. 0 times theorem prover too weak. 4807 trivial. 0 not checked. [2020-07-21 19:42:01,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491603371] [2020-07-21 19:42:01,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:42:01,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:42:01,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833216131] [2020-07-21 19:42:01,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:42:01,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:42:01,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:42:01,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:42:01,503 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 21 states. [2020-07-21 19:42:02,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:42:02,067 INFO L93 Difference]: Finished difference Result 145 states and 272 transitions. [2020-07-21 19:42:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:42:02,068 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 463 [2020-07-21 19:42:02,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:42:02,071 INFO L225 Difference]: With dead ends: 145 [2020-07-21 19:42:02,071 INFO L226 Difference]: Without dead ends: 117 [2020-07-21 19:42:02,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 933 GetRequests, 889 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:42:02,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-07-21 19:42:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-07-21 19:42:02,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-21 19:42:02,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 201 transitions. [2020-07-21 19:42:02,088 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 201 transitions. Word has length 463 [2020-07-21 19:42:02,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:42:02,089 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 201 transitions. [2020-07-21 19:42:02,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:42:02,089 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 201 transitions. [2020-07-21 19:42:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-07-21 19:42:02,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:42:02,097 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 38, 38, 35, 32, 22, 22, 22, 22, 22, 22, 22, 19, 19, 19, 19, 19, 19, 19, 16, 10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:42:02,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:02,313 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:42:02,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:42:02,314 INFO L82 PathProgramCache]: Analyzing trace with hash 198773854, now seen corresponding path program 8 times [2020-07-21 19:42:02,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:42:02,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944207716] [2020-07-21 19:42:02,315 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:02,879 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:42:02,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:42:02,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:42:02,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:42:03,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9471 backedges. 304 proven. 948 refuted. 0 times theorem prover too weak. 8219 trivial. 0 not checked. [2020-07-21 19:42:03,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:42:05,574 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:06,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:06,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:06,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:06,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:06,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:06,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:06,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:06,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9471 backedges. 306 proven. 962 refuted. 0 times theorem prover too weak. 8203 trivial. 0 not checked. [2020-07-21 19:42:07,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944207716] [2020-07-21 19:42:07,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:42:07,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:42:07,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555688799] [2020-07-21 19:42:07,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:42:07,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:42:07,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:42:07,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:42:07,026 INFO L87 Difference]: Start difference. First operand 117 states and 201 transitions. Second operand 17 states. [2020-07-21 19:42:07,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:42:07,374 INFO L93 Difference]: Finished difference Result 164 states and 328 transitions. [2020-07-21 19:42:07,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:42:07,375 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 572 [2020-07-21 19:42:07,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:42:07,380 INFO L225 Difference]: With dead ends: 164 [2020-07-21 19:42:07,380 INFO L226 Difference]: Without dead ends: 155 [2020-07-21 19:42:07,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1149 GetRequests, 1115 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:42:07,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-07-21 19:42:07,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 129. [2020-07-21 19:42:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-21 19:42:07,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 240 transitions. [2020-07-21 19:42:07,401 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 240 transitions. Word has length 572 [2020-07-21 19:42:07,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:42:07,402 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 240 transitions. [2020-07-21 19:42:07,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:42:07,402 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 240 transitions. [2020-07-21 19:42:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 19:42:07,409 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:42:07,409 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 34, 34, 26, 26, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:42:07,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:07,623 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:42:07,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:42:07,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1718758431, now seen corresponding path program 9 times [2020-07-21 19:42:07,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:42:07,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682869819] [2020-07-21 19:42:07,626 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:08,182 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:42:08,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:42:08,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:42:08,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:42:08,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7086 backedges. 339 proven. 894 refuted. 0 times theorem prover too weak. 5853 trivial. 0 not checked. [2020-07-21 19:42:08,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:42:10,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:10,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:11,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:11,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:11,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:12,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:12,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:12,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:12,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:12,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7086 backedges. 341 proven. 913 refuted. 0 times theorem prover too weak. 5832 trivial. 0 not checked. [2020-07-21 19:42:12,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682869819] [2020-07-21 19:42:12,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:42:12,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:42:12,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002581497] [2020-07-21 19:42:12,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:42:12,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:42:12,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:42:12,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:42:12,772 INFO L87 Difference]: Start difference. First operand 129 states and 240 transitions. Second operand 19 states. [2020-07-21 19:42:13,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:42:13,183 INFO L93 Difference]: Finished difference Result 172 states and 344 transitions. [2020-07-21 19:42:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:42:13,185 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 497 [2020-07-21 19:42:13,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:42:13,189 INFO L225 Difference]: With dead ends: 172 [2020-07-21 19:42:13,189 INFO L226 Difference]: Without dead ends: 163 [2020-07-21 19:42:13,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 961 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:42:13,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-21 19:42:13,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 125. [2020-07-21 19:42:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-07-21 19:42:13,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 225 transitions. [2020-07-21 19:42:13,211 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 225 transitions. Word has length 497 [2020-07-21 19:42:13,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:42:13,212 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 225 transitions. [2020-07-21 19:42:13,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:42:13,212 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 225 transitions. [2020-07-21 19:42:13,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-07-21 19:42:13,218 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:42:13,218 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 23, 21, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:42:13,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:13,433 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:42:13,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:42:13,434 INFO L82 PathProgramCache]: Analyzing trace with hash 439841979, now seen corresponding path program 10 times [2020-07-21 19:42:13,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:42:13,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393393794] [2020-07-21 19:42:13,436 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:13,919 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:42:13,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:42:13,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 874 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:42:13,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:42:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4327 backedges. 269 proven. 538 refuted. 0 times theorem prover too weak. 3520 trivial. 0 not checked. [2020-07-21 19:42:14,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:42:15,781 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:15,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:16,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:16,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:16,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:16,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:16,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:16,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:16,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:16,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:16,745 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4327 backedges. 269 proven. 554 refuted. 0 times theorem prover too weak. 3504 trivial. 0 not checked. [2020-07-21 19:42:16,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393393794] [2020-07-21 19:42:16,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:42:16,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:42:16,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447191253] [2020-07-21 19:42:16,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:42:17,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:42:17,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:42:17,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:42:17,000 INFO L87 Difference]: Start difference. First operand 125 states and 225 transitions. Second operand 17 states. [2020-07-21 19:42:17,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:42:17,315 INFO L93 Difference]: Finished difference Result 184 states and 375 transitions. [2020-07-21 19:42:17,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:42:17,317 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 393 [2020-07-21 19:42:17,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:42:17,321 INFO L225 Difference]: With dead ends: 184 [2020-07-21 19:42:17,321 INFO L226 Difference]: Without dead ends: 175 [2020-07-21 19:42:17,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 791 GetRequests, 757 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:42:17,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-07-21 19:42:17,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 122. [2020-07-21 19:42:17,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-21 19:42:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 215 transitions. [2020-07-21 19:42:17,342 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 215 transitions. Word has length 393 [2020-07-21 19:42:17,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:42:17,343 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 215 transitions. [2020-07-21 19:42:17,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:42:17,343 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 215 transitions. [2020-07-21 19:42:17,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-07-21 19:42:17,349 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:42:17,349 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 23, 22, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:42:17,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:17,564 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:42:17,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:42:17,565 INFO L82 PathProgramCache]: Analyzing trace with hash 14714015, now seen corresponding path program 11 times [2020-07-21 19:42:17,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:42:17,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929575578] [2020-07-21 19:42:17,566 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:18,047 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:42:18,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:42:18,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:42:18,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:42:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 248 proven. 448 refuted. 0 times theorem prover too weak. 3652 trivial. 0 not checked. [2020-07-21 19:42:18,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:42:19,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:19,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:19,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:20,107 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:20,162 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:20,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:20,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:20,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 248 proven. 458 refuted. 0 times theorem prover too weak. 3642 trivial. 0 not checked. [2020-07-21 19:42:20,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929575578] [2020-07-21 19:42:20,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:42:20,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:42:20,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115498712] [2020-07-21 19:42:20,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:42:20,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:42:20,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:42:20,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:42:20,646 INFO L87 Difference]: Start difference. First operand 122 states and 215 transitions. Second operand 15 states. [2020-07-21 19:42:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:42:20,942 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-07-21 19:42:20,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:42:20,943 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 394 [2020-07-21 19:42:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:42:20,948 INFO L225 Difference]: With dead ends: 212 [2020-07-21 19:42:20,949 INFO L226 Difference]: Without dead ends: 203 [2020-07-21 19:42:20,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 792 GetRequests, 763 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:42:20,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-07-21 19:42:20,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 124. [2020-07-21 19:42:20,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-07-21 19:42:20,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 224 transitions. [2020-07-21 19:42:20,976 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 224 transitions. Word has length 394 [2020-07-21 19:42:20,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:42:20,976 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 224 transitions. [2020-07-21 19:42:20,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:42:20,976 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 224 transitions. [2020-07-21 19:42:20,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-21 19:42:20,982 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:42:20,983 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 26, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:42:21,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:21,200 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:42:21,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:42:21,201 INFO L82 PathProgramCache]: Analyzing trace with hash -290324045, now seen corresponding path program 12 times [2020-07-21 19:42:21,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:42:21,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936045820] [2020-07-21 19:42:21,202 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:21,760 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:42:21,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:42:21,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 1054 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:42:21,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:42:22,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6388 backedges. 642 proven. 697 refuted. 0 times theorem prover too weak. 5049 trivial. 0 not checked. [2020-07-21 19:42:22,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:42:25,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:25,839 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:26,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:26,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:26,720 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:26,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:26,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:27,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:27,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:27,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:27,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:27,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6388 backedges. 642 proven. 730 refuted. 0 times theorem prover too weak. 5016 trivial. 0 not checked. [2020-07-21 19:42:27,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936045820] [2020-07-21 19:42:27,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:42:27,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:42:27,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750617717] [2020-07-21 19:42:27,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:42:27,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:42:27,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:42:27,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:42:27,823 INFO L87 Difference]: Start difference. First operand 124 states and 224 transitions. Second operand 21 states. [2020-07-21 19:42:28,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:42:28,442 INFO L93 Difference]: Finished difference Result 158 states and 288 transitions. [2020-07-21 19:42:28,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:42:28,443 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 474 [2020-07-21 19:42:28,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:42:28,446 INFO L225 Difference]: With dead ends: 158 [2020-07-21 19:42:28,447 INFO L226 Difference]: Without dead ends: 140 [2020-07-21 19:42:28,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 911 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:42:28,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-21 19:42:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 132. [2020-07-21 19:42:28,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-21 19:42:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 234 transitions. [2020-07-21 19:42:28,469 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 234 transitions. Word has length 474 [2020-07-21 19:42:28,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:42:28,469 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 234 transitions. [2020-07-21 19:42:28,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:42:28,469 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 234 transitions. [2020-07-21 19:42:28,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-07-21 19:42:28,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:42:28,476 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 24, 22, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:42:28,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:28,690 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:42:28,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:42:28,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1063001062, now seen corresponding path program 13 times [2020-07-21 19:42:28,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:42:28,692 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980165976] [2020-07-21 19:42:28,693 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:29,324 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:42:29,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:42:29,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:42:29,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:42:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4655 backedges. 289 proven. 555 refuted. 0 times theorem prover too weak. 3811 trivial. 0 not checked. [2020-07-21 19:42:29,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:42:31,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:31,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:31,971 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:32,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:32,141 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:32,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:32,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:32,651 INFO L134 CoverageAnalysis]: Checked inductivity of 4655 backedges. 291 proven. 567 refuted. 0 times theorem prover too weak. 3797 trivial. 0 not checked. [2020-07-21 19:42:32,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980165976] [2020-07-21 19:42:32,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:42:32,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:42:32,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619606506] [2020-07-21 19:42:32,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:42:32,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:42:32,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:42:32,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:42:32,653 INFO L87 Difference]: Start difference. First operand 132 states and 234 transitions. Second operand 17 states. [2020-07-21 19:42:33,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:42:33,012 INFO L93 Difference]: Finished difference Result 173 states and 322 transitions. [2020-07-21 19:42:33,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:42:33,014 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 407 [2020-07-21 19:42:33,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:42:33,017 INFO L225 Difference]: With dead ends: 173 [2020-07-21 19:42:33,017 INFO L226 Difference]: Without dead ends: 164 [2020-07-21 19:42:33,019 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 785 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:42:33,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-21 19:42:33,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 130. [2020-07-21 19:42:33,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-21 19:42:33,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 225 transitions. [2020-07-21 19:42:33,039 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 225 transitions. Word has length 407 [2020-07-21 19:42:33,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:42:33,039 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 225 transitions. [2020-07-21 19:42:33,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:42:33,039 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 225 transitions. [2020-07-21 19:42:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-07-21 19:42:33,045 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:42:33,046 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 24, 24, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:42:33,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:33,259 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:42:33,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:42:33,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1145336142, now seen corresponding path program 14 times [2020-07-21 19:42:33,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:42:33,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803175477] [2020-07-21 19:42:33,261 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:33,801 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:42:33,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:42:33,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:42:33,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:42:34,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5296 backedges. 399 proven. 665 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2020-07-21 19:42:34,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:42:36,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:36,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:37,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:37,389 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:37,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:37,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:37,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:37,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:37,732 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:38,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5296 backedges. 403 proven. 685 refuted. 0 times theorem prover too weak. 4208 trivial. 0 not checked. [2020-07-21 19:42:38,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803175477] [2020-07-21 19:42:38,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:42:38,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:42:38,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371263635] [2020-07-21 19:42:38,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:42:38,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:42:38,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:42:38,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:42:38,015 INFO L87 Difference]: Start difference. First operand 130 states and 225 transitions. Second operand 19 states. [2020-07-21 19:42:38,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:42:38,483 INFO L93 Difference]: Finished difference Result 187 states and 350 transitions. [2020-07-21 19:42:38,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:42:38,484 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 433 [2020-07-21 19:42:38,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:42:38,487 INFO L225 Difference]: With dead ends: 187 [2020-07-21 19:42:38,487 INFO L226 Difference]: Without dead ends: 156 [2020-07-21 19:42:38,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 872 GetRequests, 833 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:42:38,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-21 19:42:38,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 147. [2020-07-21 19:42:38,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-07-21 19:42:38,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 268 transitions. [2020-07-21 19:42:38,505 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 268 transitions. Word has length 433 [2020-07-21 19:42:38,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:42:38,505 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 268 transitions. [2020-07-21 19:42:38,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:42:38,506 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 268 transitions. [2020-07-21 19:42:38,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-07-21 19:42:38,511 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:42:38,511 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 21, 21, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 8, 8, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:42:38,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:38,727 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:42:38,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:42:38,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1789968983, now seen corresponding path program 15 times [2020-07-21 19:42:38,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:42:38,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154226694] [2020-07-21 19:42:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:39,266 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:42:39,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:42:39,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:42:39,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:42:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3748 backedges. 394 proven. 369 refuted. 0 times theorem prover too weak. 2985 trivial. 0 not checked. [2020-07-21 19:42:39,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:42:40,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:41,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:41,367 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:41,596 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:41,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:41,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:41,711 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:41,777 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:41,778 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:41,933 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 3748 backedges. 396 proven. 383 refuted. 0 times theorem prover too weak. 2969 trivial. 0 not checked. [2020-07-21 19:42:42,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154226694] [2020-07-21 19:42:42,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:42:42,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:42:42,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529954748] [2020-07-21 19:42:42,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:42:42,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:42:42,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:42:42,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:42:42,373 INFO L87 Difference]: Start difference. First operand 147 states and 268 transitions. Second operand 17 states. [2020-07-21 19:42:42,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:42:42,736 INFO L93 Difference]: Finished difference Result 213 states and 459 transitions. [2020-07-21 19:42:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:42:42,737 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 367 [2020-07-21 19:42:42,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:42:42,743 INFO L225 Difference]: With dead ends: 213 [2020-07-21 19:42:42,743 INFO L226 Difference]: Without dead ends: 204 [2020-07-21 19:42:42,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 705 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:42:42,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-21 19:42:42,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 173. [2020-07-21 19:42:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-07-21 19:42:42,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 352 transitions. [2020-07-21 19:42:42,770 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 352 transitions. Word has length 367 [2020-07-21 19:42:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:42:42,770 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 352 transitions. [2020-07-21 19:42:42,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:42:42,771 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 352 transitions. [2020-07-21 19:42:42,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2020-07-21 19:42:42,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:42:42,779 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 22, 21, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:42:42,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:42,993 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:42:42,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:42:42,994 INFO L82 PathProgramCache]: Analyzing trace with hash -329415166, now seen corresponding path program 16 times [2020-07-21 19:42:42,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:42:42,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2068547705] [2020-07-21 19:42:42,995 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:43,554 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:42:43,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:42:43,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 899 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:42:43,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:42:43,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4597 backedges. 497 proven. 475 refuted. 0 times theorem prover too weak. 3625 trivial. 0 not checked. [2020-07-21 19:42:43,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:42:45,878 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:46,397 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:46,739 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:46,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:47,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:47,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:47,291 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 4597 backedges. 501 proven. 492 refuted. 0 times theorem prover too weak. 3604 trivial. 0 not checked. [2020-07-21 19:42:47,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2068547705] [2020-07-21 19:42:47,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:42:47,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:42:47,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612473454] [2020-07-21 19:42:47,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:42:47,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:42:47,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:42:47,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:42:47,791 INFO L87 Difference]: Start difference. First operand 173 states and 352 transitions. Second operand 19 states. [2020-07-21 19:42:48,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:42:48,205 INFO L93 Difference]: Finished difference Result 232 states and 509 transitions. [2020-07-21 19:42:48,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:42:48,206 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 404 [2020-07-21 19:42:48,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:42:48,212 INFO L225 Difference]: With dead ends: 232 [2020-07-21 19:42:48,212 INFO L226 Difference]: Without dead ends: 223 [2020-07-21 19:42:48,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 814 GetRequests, 775 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:42:48,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-21 19:42:48,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 166. [2020-07-21 19:42:48,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-07-21 19:42:48,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 322 transitions. [2020-07-21 19:42:48,239 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 322 transitions. Word has length 404 [2020-07-21 19:42:48,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:42:48,240 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 322 transitions. [2020-07-21 19:42:48,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:42:48,240 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 322 transitions. [2020-07-21 19:42:48,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-07-21 19:42:48,246 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:42:48,247 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 24, 24, 22, 20, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 10, 7, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:42:48,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:48,462 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:42:48,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:42:48,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1659683269, now seen corresponding path program 17 times [2020-07-21 19:42:48,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:42:48,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371541987] [2020-07-21 19:42:48,464 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:49,035 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:42:49,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:42:49,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:42:49,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:42:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3777 backedges. 395 proven. 349 refuted. 0 times theorem prover too weak. 3033 trivial. 0 not checked. [2020-07-21 19:42:49,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:42:50,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:50,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:51,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:51,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:51,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:51,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:51,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:51,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:51,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:51,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:52,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3777 backedges. 397 proven. 361 refuted. 0 times theorem prover too weak. 3019 trivial. 0 not checked. [2020-07-21 19:42:52,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371541987] [2020-07-21 19:42:52,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:42:52,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:42:52,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366426554] [2020-07-21 19:42:52,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:42:52,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:42:52,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:42:52,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:42:52,246 INFO L87 Difference]: Start difference. First operand 166 states and 322 transitions. Second operand 17 states. [2020-07-21 19:42:52,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:42:52,603 INFO L93 Difference]: Finished difference Result 258 states and 586 transitions. [2020-07-21 19:42:52,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:42:52,605 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 367 [2020-07-21 19:42:52,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:42:52,610 INFO L225 Difference]: With dead ends: 258 [2020-07-21 19:42:52,610 INFO L226 Difference]: Without dead ends: 249 [2020-07-21 19:42:52,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 739 GetRequests, 705 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:42:52,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-07-21 19:42:52,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 161. [2020-07-21 19:42:52,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-07-21 19:42:52,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 302 transitions. [2020-07-21 19:42:52,637 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 302 transitions. Word has length 367 [2020-07-21 19:42:52,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:42:52,637 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 302 transitions. [2020-07-21 19:42:52,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:42:52,637 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 302 transitions. [2020-07-21 19:42:52,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2020-07-21 19:42:52,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:42:52,643 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 24, 24, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 9, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:42:52,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:52,858 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:42:52,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:42:52,859 INFO L82 PathProgramCache]: Analyzing trace with hash -2139086591, now seen corresponding path program 18 times [2020-07-21 19:42:52,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:42:52,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648748189] [2020-07-21 19:42:52,860 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:53,451 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:42:53,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:42:53,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:42:53,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:42:53,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4992 backedges. 356 proven. 391 refuted. 0 times theorem prover too weak. 4245 trivial. 0 not checked. [2020-07-21 19:42:53,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:42:55,101 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:55,308 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:55,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:55,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:55,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:55,523 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:55,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:55,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:55,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:42:56,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4992 backedges. 356 proven. 403 refuted. 0 times theorem prover too weak. 4233 trivial. 0 not checked. [2020-07-21 19:42:56,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648748189] [2020-07-21 19:42:56,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:42:56,289 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:42:56,289 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138411643] [2020-07-21 19:42:56,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:42:56,290 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:42:56,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:42:56,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:42:56,291 INFO L87 Difference]: Start difference. First operand 161 states and 302 transitions. Second operand 15 states. [2020-07-21 19:42:56,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:42:56,707 INFO L93 Difference]: Finished difference Result 292 states and 718 transitions. [2020-07-21 19:42:56,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:42:56,710 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 421 [2020-07-21 19:42:56,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:42:56,718 INFO L225 Difference]: With dead ends: 292 [2020-07-21 19:42:56,718 INFO L226 Difference]: Without dead ends: 283 [2020-07-21 19:42:56,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 846 GetRequests, 817 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:42:56,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-07-21 19:42:56,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 163. [2020-07-21 19:42:56,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-07-21 19:42:56,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 311 transitions. [2020-07-21 19:42:56,763 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 311 transitions. Word has length 421 [2020-07-21 19:42:56,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:42:56,764 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 311 transitions. [2020-07-21 19:42:56,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:42:56,765 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 311 transitions. [2020-07-21 19:42:56,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2020-07-21 19:42:56,775 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:42:56,775 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 38, 38, 31, 30, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 12, 10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:42:56,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:56,989 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:42:56,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:42:56,990 INFO L82 PathProgramCache]: Analyzing trace with hash 126536110, now seen corresponding path program 19 times [2020-07-21 19:42:56,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:42:56,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662467265] [2020-07-21 19:42:56,991 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:42:57,612 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:42:57,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:42:57,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:42:57,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:42:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 8436 backedges. 585 proven. 793 refuted. 0 times theorem prover too weak. 7058 trivial. 0 not checked. [2020-07-21 19:42:57,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:43:00,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:01,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:01,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:01,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:01,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:01,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:01,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:01,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:01,799 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:01,857 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:02,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:02,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8436 backedges. 585 proven. 819 refuted. 0 times theorem prover too weak. 7032 trivial. 0 not checked. [2020-07-21 19:43:02,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662467265] [2020-07-21 19:43:02,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:43:02,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:43:02,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193618806] [2020-07-21 19:43:02,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:43:02,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:02,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:43:02,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:43:02,459 INFO L87 Difference]: Start difference. First operand 163 states and 311 transitions. Second operand 19 states. [2020-07-21 19:43:02,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:02,915 INFO L93 Difference]: Finished difference Result 227 states and 477 transitions. [2020-07-21 19:43:02,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:43:02,917 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 542 [2020-07-21 19:43:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:02,921 INFO L225 Difference]: With dead ends: 227 [2020-07-21 19:43:02,921 INFO L226 Difference]: Without dead ends: 209 [2020-07-21 19:43:02,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1090 GetRequests, 1051 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:43:02,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-07-21 19:43:02,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 154. [2020-07-21 19:43:02,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-07-21 19:43:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 302 transitions. [2020-07-21 19:43:02,943 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 302 transitions. Word has length 542 [2020-07-21 19:43:02,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:02,944 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 302 transitions. [2020-07-21 19:43:02,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:43:02,944 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 302 transitions. [2020-07-21 19:43:02,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-07-21 19:43:02,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:02,949 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 23, 22, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 9, 8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:43:03,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:03,163 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:03,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:03,164 INFO L82 PathProgramCache]: Analyzing trace with hash 972979631, now seen corresponding path program 20 times [2020-07-21 19:43:03,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:03,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718166625] [2020-07-21 19:43:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:03,722 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:43:03,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:03,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 876 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:43:03,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:03,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 431 proven. 377 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2020-07-21 19:43:03,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:43:05,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:05,569 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:05,898 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:06,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:06,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:06,274 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:06,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:06,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:06,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:07,012 INFO L134 CoverageAnalysis]: Checked inductivity of 4348 backedges. 431 proven. 393 refuted. 0 times theorem prover too weak. 3524 trivial. 0 not checked. [2020-07-21 19:43:07,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718166625] [2020-07-21 19:43:07,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:43:07,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:43:07,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208403882] [2020-07-21 19:43:07,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:43:07,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:07,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:43:07,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:43:07,015 INFO L87 Difference]: Start difference. First operand 154 states and 302 transitions. Second operand 17 states. [2020-07-21 19:43:07,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:07,373 INFO L93 Difference]: Finished difference Result 214 states and 460 transitions. [2020-07-21 19:43:07,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:43:07,375 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 394 [2020-07-21 19:43:07,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:07,377 INFO L225 Difference]: With dead ends: 214 [2020-07-21 19:43:07,378 INFO L226 Difference]: Without dead ends: 205 [2020-07-21 19:43:07,379 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 793 GetRequests, 759 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:43:07,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-21 19:43:07,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 149. [2020-07-21 19:43:07,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-21 19:43:07,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 284 transitions. [2020-07-21 19:43:07,395 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 284 transitions. Word has length 394 [2020-07-21 19:43:07,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:07,396 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 284 transitions. [2020-07-21 19:43:07,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:43:07,396 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 284 transitions. [2020-07-21 19:43:07,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 19:43:07,399 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:07,399 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 27, 26, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 11, 10, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:43:07,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:07,600 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:07,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:07,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1482126225, now seen corresponding path program 21 times [2020-07-21 19:43:07,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:07,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148741960] [2020-07-21 19:43:07,602 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:08,155 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:43:08,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:08,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:43:08,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5744 backedges. 676 proven. 292 refuted. 0 times theorem prover too weak. 4776 trivial. 0 not checked. [2020-07-21 19:43:08,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:43:09,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:09,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:10,217 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:10,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:10,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:10,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:10,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:10,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:10,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 5744 backedges. 680 proven. 304 refuted. 0 times theorem prover too weak. 4760 trivial. 0 not checked. [2020-07-21 19:43:11,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148741960] [2020-07-21 19:43:11,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:43:11,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:43:11,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124807089] [2020-07-21 19:43:11,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:43:11,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:11,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:43:11,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:43:11,915 INFO L87 Difference]: Start difference. First operand 149 states and 284 transitions. Second operand 17 states. [2020-07-21 19:43:12,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:12,323 INFO L93 Difference]: Finished difference Result 228 states and 520 transitions. [2020-07-21 19:43:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:43:12,324 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 450 [2020-07-21 19:43:12,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:12,329 INFO L225 Difference]: With dead ends: 228 [2020-07-21 19:43:12,330 INFO L226 Difference]: Without dead ends: 213 [2020-07-21 19:43:12,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 905 GetRequests, 871 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:43:12,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-07-21 19:43:12,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 182. [2020-07-21 19:43:12,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-07-21 19:43:12,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 388 transitions. [2020-07-21 19:43:12,357 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 388 transitions. Word has length 450 [2020-07-21 19:43:12,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:12,357 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 388 transitions. [2020-07-21 19:43:12,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:43:12,358 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 388 transitions. [2020-07-21 19:43:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 458 [2020-07-21 19:43:12,363 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:12,363 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 30, 30, 24, 24, 18, 18, 18, 18, 18, 18, 18, 15, 15, 15, 15, 15, 15, 15, 13, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:43:12,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:12,564 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:12,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:12,565 INFO L82 PathProgramCache]: Analyzing trace with hash 2064571546, now seen corresponding path program 22 times [2020-07-21 19:43:12,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:12,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231755479] [2020-07-21 19:43:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:13,202 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:43:13,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:13,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 1017 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:43:13,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5988 backedges. 435 proven. 392 refuted. 0 times theorem prover too weak. 5161 trivial. 0 not checked. [2020-07-21 19:43:13,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:43:15,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:15,317 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:15,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:15,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:15,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:15,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:15,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5988 backedges. 437 proven. 400 refuted. 0 times theorem prover too weak. 5151 trivial. 0 not checked. [2020-07-21 19:43:16,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231755479] [2020-07-21 19:43:16,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:43:16,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:43:16,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682382522] [2020-07-21 19:43:16,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:43:16,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:16,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:43:16,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:43:16,472 INFO L87 Difference]: Start difference. First operand 182 states and 388 transitions. Second operand 15 states. [2020-07-21 19:43:16,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:16,789 INFO L93 Difference]: Finished difference Result 284 states and 694 transitions. [2020-07-21 19:43:16,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:43:16,791 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 457 [2020-07-21 19:43:16,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:16,796 INFO L225 Difference]: With dead ends: 284 [2020-07-21 19:43:16,797 INFO L226 Difference]: Without dead ends: 275 [2020-07-21 19:43:16,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 889 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:43:16,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-07-21 19:43:16,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 192. [2020-07-21 19:43:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-21 19:43:16,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 437 transitions. [2020-07-21 19:43:16,828 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 437 transitions. Word has length 457 [2020-07-21 19:43:16,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:16,829 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 437 transitions. [2020-07-21 19:43:16,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:43:16,829 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 437 transitions. [2020-07-21 19:43:16,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2020-07-21 19:43:16,836 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:16,836 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 30, 30, 23, 22, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 13, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:43:17,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:17,050 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:17,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:17,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1276266743, now seen corresponding path program 23 times [2020-07-21 19:43:17,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:17,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665716736] [2020-07-21 19:43:17,052 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:17,681 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:43:17,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:17,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 984 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:43:17,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 517 proven. 401 refuted. 0 times theorem prover too weak. 4650 trivial. 0 not checked. [2020-07-21 19:43:17,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:43:19,783 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:19,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:20,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:20,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:20,313 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:20,444 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:20,445 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:20,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:20,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:20,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:20,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 521 proven. 411 refuted. 0 times theorem prover too weak. 4636 trivial. 0 not checked. [2020-07-21 19:43:21,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665716736] [2020-07-21 19:43:21,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:43:21,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:43:21,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536138821] [2020-07-21 19:43:21,468 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:43:21,468 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:21,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:43:21,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:43:21,469 INFO L87 Difference]: Start difference. First operand 192 states and 437 transitions. Second operand 17 states. [2020-07-21 19:43:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:21,830 INFO L93 Difference]: Finished difference Result 231 states and 526 transitions. [2020-07-21 19:43:21,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:43:21,832 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 442 [2020-07-21 19:43:21,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:21,837 INFO L225 Difference]: With dead ends: 231 [2020-07-21 19:43:21,837 INFO L226 Difference]: Without dead ends: 222 [2020-07-21 19:43:21,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 855 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:43:21,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-07-21 19:43:21,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 182. [2020-07-21 19:43:21,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-07-21 19:43:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 392 transitions. [2020-07-21 19:43:21,863 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 392 transitions. Word has length 442 [2020-07-21 19:43:21,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:21,863 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 392 transitions. [2020-07-21 19:43:21,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:43:21,864 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 392 transitions. [2020-07-21 19:43:21,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-07-21 19:43:21,871 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:21,872 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 32, 32, 27, 25, 20, 20, 20, 20, 20, 20, 20, 16, 16, 16, 16, 16, 16, 16, 16, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:43:22,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:22,085 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:22,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:22,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1050807325, now seen corresponding path program 24 times [2020-07-21 19:43:22,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:22,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800378567] [2020-07-21 19:43:22,086 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:22,711 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:43:22,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:22,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:43:22,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:22,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7155 backedges. 707 proven. 550 refuted. 0 times theorem prover too weak. 5898 trivial. 0 not checked. [2020-07-21 19:43:22,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:43:25,496 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:26,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:26,360 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:26,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:26,606 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:26,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:26,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:26,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:26,790 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:26,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:26,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:27,142 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:27,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7155 backedges. 709 proven. 572 refuted. 0 times theorem prover too weak. 5874 trivial. 0 not checked. [2020-07-21 19:43:27,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800378567] [2020-07-21 19:43:27,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:43:27,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:43:27,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773244321] [2020-07-21 19:43:27,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:43:27,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:27,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:43:27,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:43:27,748 INFO L87 Difference]: Start difference. First operand 182 states and 392 transitions. Second operand 19 states. [2020-07-21 19:43:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:28,338 INFO L93 Difference]: Finished difference Result 227 states and 505 transitions. [2020-07-21 19:43:28,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:43:28,339 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 497 [2020-07-21 19:43:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:28,343 INFO L225 Difference]: With dead ends: 227 [2020-07-21 19:43:28,343 INFO L226 Difference]: Without dead ends: 209 [2020-07-21 19:43:28,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 961 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:43:28,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-07-21 19:43:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 197. [2020-07-21 19:43:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-07-21 19:43:28,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2020-07-21 19:43:28,367 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 497 [2020-07-21 19:43:28,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:28,368 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2020-07-21 19:43:28,368 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:43:28,368 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2020-07-21 19:43:28,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-07-21 19:43:28,373 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:28,374 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 32, 32, 25, 25, 20, 20, 20, 20, 20, 20, 20, 16, 16, 16, 16, 16, 16, 16, 16, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:43:28,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:28,575 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:28,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:28,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1706474269, now seen corresponding path program 25 times [2020-07-21 19:43:28,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:28,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854970966] [2020-07-21 19:43:28,577 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:29,234 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:43:29,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:29,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 1102 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:43:29,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7104 backedges. 884 proven. 349 refuted. 0 times theorem prover too weak. 5871 trivial. 0 not checked. [2020-07-21 19:43:29,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:43:31,451 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:32,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:32,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:32,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:32,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:32,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:32,685 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:32,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:32,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:32,915 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:32,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:33,232 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:34,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7104 backedges. 888 proven. 366 refuted. 0 times theorem prover too weak. 5850 trivial. 0 not checked. [2020-07-21 19:43:34,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854970966] [2020-07-21 19:43:34,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:43:34,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:43:34,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311743163] [2020-07-21 19:43:34,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:43:34,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:34,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:43:34,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:43:34,446 INFO L87 Difference]: Start difference. First operand 197 states and 443 transitions. Second operand 19 states. [2020-07-21 19:43:34,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:34,911 INFO L93 Difference]: Finished difference Result 258 states and 635 transitions. [2020-07-21 19:43:34,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:43:34,913 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 495 [2020-07-21 19:43:34,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:34,917 INFO L225 Difference]: With dead ends: 258 [2020-07-21 19:43:34,917 INFO L226 Difference]: Without dead ends: 243 [2020-07-21 19:43:34,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 996 GetRequests, 957 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:43:34,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-21 19:43:34,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 195. [2020-07-21 19:43:34,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-07-21 19:43:34,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 409 transitions. [2020-07-21 19:43:34,945 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 409 transitions. Word has length 495 [2020-07-21 19:43:34,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:34,946 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 409 transitions. [2020-07-21 19:43:34,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:43:34,946 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 409 transitions. [2020-07-21 19:43:34,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-07-21 19:43:34,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:34,953 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 23, 23, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 9, 8, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:43:35,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:35,167 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:35,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:35,167 INFO L82 PathProgramCache]: Analyzing trace with hash 2022204424, now seen corresponding path program 26 times [2020-07-21 19:43:35,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:35,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [24469798] [2020-07-21 19:43:35,168 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:35,809 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:43:35,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:35,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:43:35,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 389 proven. 315 refuted. 0 times theorem prover too weak. 3958 trivial. 0 not checked. [2020-07-21 19:43:35,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:43:37,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:37,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:37,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:37,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:37,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:37,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:37,744 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:37,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:37,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:38,015 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 4662 backedges. 389 proven. 325 refuted. 0 times theorem prover too weak. 3948 trivial. 0 not checked. [2020-07-21 19:43:38,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [24469798] [2020-07-21 19:43:38,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:43:38,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:43:38,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593019559] [2020-07-21 19:43:38,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:43:38,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:38,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:43:38,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:43:38,437 INFO L87 Difference]: Start difference. First operand 195 states and 409 transitions. Second operand 15 states. [2020-07-21 19:43:38,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:38,697 INFO L93 Difference]: Finished difference Result 293 states and 684 transitions. [2020-07-21 19:43:38,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:43:38,698 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 407 [2020-07-21 19:43:38,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:38,703 INFO L225 Difference]: With dead ends: 293 [2020-07-21 19:43:38,703 INFO L226 Difference]: Without dead ends: 284 [2020-07-21 19:43:38,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 789 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:43:38,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-07-21 19:43:38,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 192. [2020-07-21 19:43:38,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-21 19:43:38,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 399 transitions. [2020-07-21 19:43:38,723 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 399 transitions. Word has length 407 [2020-07-21 19:43:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:38,723 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 399 transitions. [2020-07-21 19:43:38,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:43:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 399 transitions. [2020-07-21 19:43:38,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-21 19:43:38,728 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:38,728 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 26, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:43:38,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:38,929 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:38,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:38,930 INFO L82 PathProgramCache]: Analyzing trace with hash 136070156, now seen corresponding path program 27 times [2020-07-21 19:43:38,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:38,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633225469] [2020-07-21 19:43:38,931 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:39,589 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:43:39,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:39,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:43:39,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 676 proven. 230 refuted. 0 times theorem prover too weak. 4471 trivial. 0 not checked. [2020-07-21 19:43:39,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:43:41,084 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:41,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:41,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:41,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:41,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:41,884 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:41,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:42,147 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 678 proven. 244 refuted. 0 times theorem prover too weak. 4455 trivial. 0 not checked. [2020-07-21 19:43:42,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633225469] [2020-07-21 19:43:42,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:43:42,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:43:42,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363744139] [2020-07-21 19:43:42,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:43:42,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:42,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:43:42,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:43:42,921 INFO L87 Difference]: Start difference. First operand 192 states and 399 transitions. Second operand 17 states. [2020-07-21 19:43:43,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:43,242 INFO L93 Difference]: Finished difference Result 306 states and 757 transitions. [2020-07-21 19:43:43,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:43:43,243 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 436 [2020-07-21 19:43:43,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:43,249 INFO L225 Difference]: With dead ends: 306 [2020-07-21 19:43:43,249 INFO L226 Difference]: Without dead ends: 291 [2020-07-21 19:43:43,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 843 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:43:43,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-07-21 19:43:43,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 187. [2020-07-21 19:43:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-21 19:43:43,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 375 transitions. [2020-07-21 19:43:43,273 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 375 transitions. Word has length 436 [2020-07-21 19:43:43,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:43,273 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 375 transitions. [2020-07-21 19:43:43,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:43:43,274 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 375 transitions. [2020-07-21 19:43:43,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-21 19:43:43,277 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:43,278 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 24, 24, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 9, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:43:43,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:43,478 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:43,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:43,479 INFO L82 PathProgramCache]: Analyzing trace with hash -443177628, now seen corresponding path program 28 times [2020-07-21 19:43:43,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:43,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2021610615] [2020-07-21 19:43:43,480 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:44,125 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:43:44,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:44,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:43:44,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4708 backedges. 568 proven. 161 refuted. 0 times theorem prover too weak. 3979 trivial. 0 not checked. [2020-07-21 19:43:44,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:43:45,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:45,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:45,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:45,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:45,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:45,806 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:45,867 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:46,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4708 backedges. 570 proven. 169 refuted. 0 times theorem prover too weak. 3969 trivial. 0 not checked. [2020-07-21 19:43:46,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2021610615] [2020-07-21 19:43:46,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:43:46,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:43:46,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136792002] [2020-07-21 19:43:46,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:43:46,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:46,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:43:46,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:43:46,832 INFO L87 Difference]: Start difference. First operand 187 states and 375 transitions. Second operand 15 states. [2020-07-21 19:43:47,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:47,136 INFO L93 Difference]: Finished difference Result 331 states and 885 transitions. [2020-07-21 19:43:47,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:43:47,137 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 409 [2020-07-21 19:43:47,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:47,143 INFO L225 Difference]: With dead ends: 331 [2020-07-21 19:43:47,143 INFO L226 Difference]: Without dead ends: 316 [2020-07-21 19:43:47,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 793 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:43:47,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-07-21 19:43:47,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 189. [2020-07-21 19:43:47,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-21 19:43:47,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 388 transitions. [2020-07-21 19:43:47,173 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 388 transitions. Word has length 409 [2020-07-21 19:43:47,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:47,174 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 388 transitions. [2020-07-21 19:43:47,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:43:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 388 transitions. [2020-07-21 19:43:47,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 19:43:47,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:47,181 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 29, 28, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 11, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:43:47,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:47,395 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:47,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:47,396 INFO L82 PathProgramCache]: Analyzing trace with hash 626977665, now seen corresponding path program 29 times [2020-07-21 19:43:47,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:47,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221971044] [2020-07-21 19:43:47,397 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:48,060 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:43:48,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:48,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:43:48,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:48,262 INFO L134 CoverageAnalysis]: Checked inductivity of 7192 backedges. 894 proven. 369 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2020-07-21 19:43:48,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:43:50,163 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:50,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:51,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:51,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:51,470 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:51,533 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:51,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:51,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 7192 backedges. 896 proven. 391 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2020-07-21 19:43:52,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221971044] [2020-07-21 19:43:52,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:43:52,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:43:52,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799761695] [2020-07-21 19:43:52,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:43:52,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:52,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:43:52,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:43:52,644 INFO L87 Difference]: Start difference. First operand 189 states and 388 transitions. Second operand 19 states. [2020-07-21 19:43:53,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:53,072 INFO L93 Difference]: Finished difference Result 256 states and 522 transitions. [2020-07-21 19:43:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:43:53,073 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 502 [2020-07-21 19:43:53,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:53,078 INFO L225 Difference]: With dead ends: 256 [2020-07-21 19:43:53,078 INFO L226 Difference]: Without dead ends: 241 [2020-07-21 19:43:53,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 971 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:43:53,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-07-21 19:43:53,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 206. [2020-07-21 19:43:53,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-21 19:43:53,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 417 transitions. [2020-07-21 19:43:53,104 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 417 transitions. Word has length 502 [2020-07-21 19:43:53,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:53,105 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 417 transitions. [2020-07-21 19:43:53,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:43:53,105 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 417 transitions. [2020-07-21 19:43:53,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 19:43:53,112 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:53,112 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 29, 26, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 13, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:43:53,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:53,326 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:53,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:53,327 INFO L82 PathProgramCache]: Analyzing trace with hash -842873781, now seen corresponding path program 30 times [2020-07-21 19:43:53,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:53,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776658700] [2020-07-21 19:43:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:53,983 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:43:53,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:53,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:43:53,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6455 backedges. 745 proven. 259 refuted. 0 times theorem prover too weak. 5451 trivial. 0 not checked. [2020-07-21 19:43:54,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:43:55,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:56,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:56,035 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:56,220 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:56,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:56,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:56,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:56,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:56,549 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:56,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:43:57,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6455 backedges. 749 proven. 271 refuted. 0 times theorem prover too weak. 5435 trivial. 0 not checked. [2020-07-21 19:43:57,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776658700] [2020-07-21 19:43:57,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:43:57,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:43:57,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956640295] [2020-07-21 19:43:57,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:43:57,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:43:57,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:43:57,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:43:57,652 INFO L87 Difference]: Start difference. First operand 206 states and 417 transitions. Second operand 17 states. [2020-07-21 19:43:57,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:43:57,990 INFO L93 Difference]: Finished difference Result 240 states and 483 transitions. [2020-07-21 19:43:57,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:43:57,992 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 476 [2020-07-21 19:43:57,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:43:57,996 INFO L225 Difference]: With dead ends: 240 [2020-07-21 19:43:57,996 INFO L226 Difference]: Without dead ends: 225 [2020-07-21 19:43:57,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 923 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:43:57,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-07-21 19:43:58,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 201. [2020-07-21 19:43:58,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-07-21 19:43:58,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 401 transitions. [2020-07-21 19:43:58,015 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 401 transitions. Word has length 476 [2020-07-21 19:43:58,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:43:58,015 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 401 transitions. [2020-07-21 19:43:58,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:43:58,015 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 401 transitions. [2020-07-21 19:43:58,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 19:43:58,020 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:43:58,020 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 30, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 13, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:43:58,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:58,221 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:43:58,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:43:58,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1676826726, now seen corresponding path program 31 times [2020-07-21 19:43:58,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:43:58,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255912263] [2020-07-21 19:43:58,223 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:43:58,915 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:43:58,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:43:58,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:43:58,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:43:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6842 backedges. 717 proven. 320 refuted. 0 times theorem prover too weak. 5805 trivial. 0 not checked. [2020-07-21 19:43:59,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:44:00,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:01,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:01,355 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:01,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:01,541 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:01,542 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:01,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:01,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6842 backedges. 721 proven. 330 refuted. 0 times theorem prover too weak. 5791 trivial. 0 not checked. [2020-07-21 19:44:02,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255912263] [2020-07-21 19:44:02,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:44:02,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:44:02,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527654858] [2020-07-21 19:44:02,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:44:02,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:02,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:44:02,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:44:02,750 INFO L87 Difference]: Start difference. First operand 201 states and 401 transitions. Second operand 17 states. [2020-07-21 19:44:03,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:03,112 INFO L93 Difference]: Finished difference Result 286 states and 589 transitions. [2020-07-21 19:44:03,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:44:03,113 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 490 [2020-07-21 19:44:03,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:03,119 INFO L225 Difference]: With dead ends: 286 [2020-07-21 19:44:03,119 INFO L226 Difference]: Without dead ends: 271 [2020-07-21 19:44:03,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 985 GetRequests, 951 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:44:03,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-07-21 19:44:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 194. [2020-07-21 19:44:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-07-21 19:44:03,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 368 transitions. [2020-07-21 19:44:03,149 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 368 transitions. Word has length 490 [2020-07-21 19:44:03,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:03,150 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 368 transitions. [2020-07-21 19:44:03,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:44:03,150 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 368 transitions. [2020-07-21 19:44:03,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-07-21 19:44:03,154 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:03,155 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 29, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:03,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:03,356 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:03,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:03,357 INFO L82 PathProgramCache]: Analyzing trace with hash -2140732382, now seen corresponding path program 32 times [2020-07-21 19:44:03,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:03,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546953389] [2020-07-21 19:44:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:04,032 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:44:04,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:04,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:44:04,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6813 backedges. 854 proven. 257 refuted. 0 times theorem prover too weak. 5702 trivial. 0 not checked. [2020-07-21 19:44:04,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:44:05,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:06,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:06,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:06,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:06,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:06,540 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:06,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:06,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:06,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:06,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:07,026 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6813 backedges. 854 proven. 277 refuted. 0 times theorem prover too weak. 5682 trivial. 0 not checked. [2020-07-21 19:44:07,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546953389] [2020-07-21 19:44:07,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:44:07,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:44:07,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197168174] [2020-07-21 19:44:07,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:44:07,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:07,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:44:07,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:44:07,885 INFO L87 Difference]: Start difference. First operand 194 states and 368 transitions. Second operand 17 states. [2020-07-21 19:44:08,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:08,340 INFO L93 Difference]: Finished difference Result 282 states and 593 transitions. [2020-07-21 19:44:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:44:08,342 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 489 [2020-07-21 19:44:08,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:08,346 INFO L225 Difference]: With dead ends: 282 [2020-07-21 19:44:08,346 INFO L226 Difference]: Without dead ends: 261 [2020-07-21 19:44:08,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 949 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:44:08,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-07-21 19:44:08,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 214. [2020-07-21 19:44:08,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-07-21 19:44:08,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 420 transitions. [2020-07-21 19:44:08,370 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 420 transitions. Word has length 489 [2020-07-21 19:44:08,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:08,371 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 420 transitions. [2020-07-21 19:44:08,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:44:08,371 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 420 transitions. [2020-07-21 19:44:08,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-07-21 19:44:08,377 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:08,378 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 25, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:08,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:08,586 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:08,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:08,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2112133106, now seen corresponding path program 33 times [2020-07-21 19:44:08,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:08,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179491402] [2020-07-21 19:44:08,588 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:09,276 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:44:09,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:09,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:44:09,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6031 backedges. 930 proven. 211 refuted. 0 times theorem prover too weak. 4890 trivial. 0 not checked. [2020-07-21 19:44:09,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:44:11,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:12,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:12,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:12,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:12,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:12,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:12,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:12,648 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:12,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:12,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:12,758 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:12,811 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:13,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:13,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6031 backedges. 934 proven. 233 refuted. 0 times theorem prover too weak. 4864 trivial. 0 not checked. [2020-07-21 19:44:13,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179491402] [2020-07-21 19:44:13,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:44:13,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-21 19:44:13,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840449251] [2020-07-21 19:44:13,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 19:44:13,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:13,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 19:44:13,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:44:13,966 INFO L87 Difference]: Start difference. First operand 214 states and 420 transitions. Second operand 20 states. [2020-07-21 19:44:14,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:14,433 INFO L93 Difference]: Finished difference Result 317 states and 709 transitions. [2020-07-21 19:44:14,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:44:14,435 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 461 [2020-07-21 19:44:14,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:14,440 INFO L225 Difference]: With dead ends: 317 [2020-07-21 19:44:14,440 INFO L226 Difference]: Without dead ends: 302 [2020-07-21 19:44:14,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 889 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-21 19:44:14,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-07-21 19:44:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 219. [2020-07-21 19:44:14,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-07-21 19:44:14,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 448 transitions. [2020-07-21 19:44:14,460 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 448 transitions. Word has length 461 [2020-07-21 19:44:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:14,460 INFO L479 AbstractCegarLoop]: Abstraction has 219 states and 448 transitions. [2020-07-21 19:44:14,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 19:44:14,461 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 448 transitions. [2020-07-21 19:44:14,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-21 19:44:14,464 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:14,465 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 35, 29, 19, 19, 19, 19, 19, 19, 19, 18, 17, 17, 17, 17, 17, 17, 17, 10, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:14,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:14,666 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:14,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:14,667 INFO L82 PathProgramCache]: Analyzing trace with hash 318820515, now seen corresponding path program 34 times [2020-07-21 19:44:14,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:14,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656878352] [2020-07-21 19:44:14,668 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:15,470 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:44:15,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:15,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:44:15,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 7421 backedges. 294 proven. 983 refuted. 0 times theorem prover too weak. 6144 trivial. 0 not checked. [2020-07-21 19:44:15,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:44:18,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:18,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:19,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:19,276 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:19,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:19,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:19,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:19,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:20,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:20,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:20,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:20,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:20,196 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:20,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 7421 backedges. 298 proven. 1005 refuted. 0 times theorem prover too weak. 6118 trivial. 0 not checked. [2020-07-21 19:44:20,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656878352] [2020-07-21 19:44:20,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:44:20,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:44:20,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540759583] [2020-07-21 19:44:20,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:44:20,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:20,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:44:20,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:44:20,444 INFO L87 Difference]: Start difference. First operand 219 states and 448 transitions. Second operand 19 states. [2020-07-21 19:44:20,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:20,965 INFO L93 Difference]: Finished difference Result 329 states and 732 transitions. [2020-07-21 19:44:20,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:44:20,967 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 509 [2020-07-21 19:44:20,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:20,973 INFO L225 Difference]: With dead ends: 329 [2020-07-21 19:44:20,973 INFO L226 Difference]: Without dead ends: 263 [2020-07-21 19:44:20,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1024 GetRequests, 985 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:44:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-07-21 19:44:20,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 228. [2020-07-21 19:44:20,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-07-21 19:44:21,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 458 transitions. [2020-07-21 19:44:21,001 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 458 transitions. Word has length 509 [2020-07-21 19:44:21,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:21,001 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 458 transitions. [2020-07-21 19:44:21,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:44:21,002 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 458 transitions. [2020-07-21 19:44:21,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-07-21 19:44:21,007 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:21,007 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 27, 26, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 12, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:21,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:21,221 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:21,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:21,222 INFO L82 PathProgramCache]: Analyzing trace with hash 694398943, now seen corresponding path program 35 times [2020-07-21 19:44:21,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:21,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182525794] [2020-07-21 19:44:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:21,958 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:44:21,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:21,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:44:21,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5744 backedges. 247 proven. 864 refuted. 0 times theorem prover too weak. 4633 trivial. 0 not checked. [2020-07-21 19:44:22,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:44:24,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:24,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:25,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:25,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:26,154 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:26,155 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:26,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:26,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:26,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:26,682 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:26,712 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:26,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5744 backedges. 255 proven. 880 refuted. 0 times theorem prover too weak. 4609 trivial. 0 not checked. [2020-07-21 19:44:26,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182525794] [2020-07-21 19:44:26,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:44:26,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:44:26,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694865850] [2020-07-21 19:44:26,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:44:26,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:26,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:44:26,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:44:26,835 INFO L87 Difference]: Start difference. First operand 228 states and 458 transitions. Second operand 19 states. [2020-07-21 19:44:27,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:27,390 INFO L93 Difference]: Finished difference Result 452 states and 948 transitions. [2020-07-21 19:44:27,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:44:27,392 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 450 [2020-07-21 19:44:27,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:27,398 INFO L225 Difference]: With dead ends: 452 [2020-07-21 19:44:27,398 INFO L226 Difference]: Without dead ends: 251 [2020-07-21 19:44:27,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 867 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:44:27,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-07-21 19:44:27,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 225. [2020-07-21 19:44:27,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-07-21 19:44:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 435 transitions. [2020-07-21 19:44:27,419 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 435 transitions. Word has length 450 [2020-07-21 19:44:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:27,420 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 435 transitions. [2020-07-21 19:44:27,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:44:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 435 transitions. [2020-07-21 19:44:27,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 19:44:27,424 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:27,424 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 31, 25, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 15, 8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:27,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:27,638 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:27,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:27,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1674925279, now seen corresponding path program 36 times [2020-07-21 19:44:27,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:27,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820916859] [2020-07-21 19:44:27,640 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:28,381 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:44:28,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:28,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:44:28,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:28,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6489 backedges. 347 proven. 684 refuted. 0 times theorem prover too weak. 5458 trivial. 0 not checked. [2020-07-21 19:44:28,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:44:30,797 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:30,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:31,550 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:31,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:31,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:31,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:31,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:31,904 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:31,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:31,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:32,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:32,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:32,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6489 backedges. 353 proven. 696 refuted. 0 times theorem prover too weak. 5440 trivial. 0 not checked. [2020-07-21 19:44:32,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820916859] [2020-07-21 19:44:32,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:44:32,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:44:32,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74037666] [2020-07-21 19:44:32,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:44:32,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:32,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:44:32,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:44:32,462 INFO L87 Difference]: Start difference. First operand 225 states and 435 transitions. Second operand 17 states. [2020-07-21 19:44:32,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:32,857 INFO L93 Difference]: Finished difference Result 294 states and 559 transitions. [2020-07-21 19:44:32,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:44:32,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 477 [2020-07-21 19:44:32,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:32,862 INFO L225 Difference]: With dead ends: 294 [2020-07-21 19:44:32,862 INFO L226 Difference]: Without dead ends: 274 [2020-07-21 19:44:32,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 925 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:44:32,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-07-21 19:44:32,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 228. [2020-07-21 19:44:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-07-21 19:44:32,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 438 transitions. [2020-07-21 19:44:32,884 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 438 transitions. Word has length 477 [2020-07-21 19:44:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:32,884 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 438 transitions. [2020-07-21 19:44:32,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:44:32,884 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 438 transitions. [2020-07-21 19:44:32,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-07-21 19:44:32,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:32,891 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 31, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 14, 9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:33,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:33,106 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:33,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:33,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1690936334, now seen corresponding path program 37 times [2020-07-21 19:44:33,106 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:33,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135644571] [2020-07-21 19:44:33,107 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:33,864 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:44:33,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:33,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 1091 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:44:33,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:34,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6872 backedges. 481 proven. 582 refuted. 0 times theorem prover too weak. 5809 trivial. 0 not checked. [2020-07-21 19:44:34,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:44:36,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:36,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:37,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:37,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:37,306 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:37,307 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:37,350 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:37,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:37,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6872 backedges. 485 proven. 596 refuted. 0 times theorem prover too weak. 5791 trivial. 0 not checked. [2020-07-21 19:44:38,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2135644571] [2020-07-21 19:44:38,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:44:38,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:44:38,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270113117] [2020-07-21 19:44:38,101 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:44:38,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:38,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:44:38,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:44:38,102 INFO L87 Difference]: Start difference. First operand 228 states and 438 transitions. Second operand 17 states. [2020-07-21 19:44:38,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:38,523 INFO L93 Difference]: Finished difference Result 339 states and 664 transitions. [2020-07-21 19:44:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:44:38,525 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 491 [2020-07-21 19:44:38,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:38,530 INFO L225 Difference]: With dead ends: 339 [2020-07-21 19:44:38,530 INFO L226 Difference]: Without dead ends: 318 [2020-07-21 19:44:38,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 987 GetRequests, 953 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:44:38,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-07-21 19:44:38,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 225. [2020-07-21 19:44:38,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-07-21 19:44:38,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 435 transitions. [2020-07-21 19:44:38,554 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 435 transitions. Word has length 491 [2020-07-21 19:44:38,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:38,554 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 435 transitions. [2020-07-21 19:44:38,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:44:38,554 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 435 transitions. [2020-07-21 19:44:38,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-07-21 19:44:38,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:38,558 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 28, 25, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:38,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:38,759 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:38,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:38,759 INFO L82 PathProgramCache]: Analyzing trace with hash -653087044, now seen corresponding path program 38 times [2020-07-21 19:44:38,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:38,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503988341] [2020-07-21 19:44:38,760 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:39,511 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:44:39,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:39,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:44:39,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:39,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6058 backedges. 515 proven. 477 refuted. 0 times theorem prover too weak. 5066 trivial. 0 not checked. [2020-07-21 19:44:39,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:44:42,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:42,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:42,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:42,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:42,692 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:42,693 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:42,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:42,909 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:42,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:43,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:43,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 6058 backedges. 519 proven. 491 refuted. 0 times theorem prover too weak. 5048 trivial. 0 not checked. [2020-07-21 19:44:43,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503988341] [2020-07-21 19:44:43,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:44:43,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:44:43,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309962983] [2020-07-21 19:44:43,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:44:43,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:43,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:44:43,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:44:43,834 INFO L87 Difference]: Start difference. First operand 225 states and 435 transitions. Second operand 17 states. [2020-07-21 19:44:44,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:44,296 INFO L93 Difference]: Finished difference Result 284 states and 554 transitions. [2020-07-21 19:44:44,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:44:44,297 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 462 [2020-07-21 19:44:44,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:44,302 INFO L225 Difference]: With dead ends: 284 [2020-07-21 19:44:44,302 INFO L226 Difference]: Without dead ends: 269 [2020-07-21 19:44:44,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 929 GetRequests, 895 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:44:44,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-07-21 19:44:44,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 217. [2020-07-21 19:44:44,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-07-21 19:44:44,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 417 transitions. [2020-07-21 19:44:44,322 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 417 transitions. Word has length 462 [2020-07-21 19:44:44,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:44,322 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 417 transitions. [2020-07-21 19:44:44,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:44:44,322 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 417 transitions. [2020-07-21 19:44:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2020-07-21 19:44:44,325 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:44,325 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 27, 27, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:44,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:44,526 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:44,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:44,527 INFO L82 PathProgramCache]: Analyzing trace with hash 238192671, now seen corresponding path program 39 times [2020-07-21 19:44:44,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:44,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134304993] [2020-07-21 19:44:44,528 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:45,353 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:44:45,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:45,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 1002 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:44:45,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:45,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5758 backedges. 735 proven. 230 refuted. 0 times theorem prover too weak. 4793 trivial. 0 not checked. [2020-07-21 19:44:45,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:44:47,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:47,546 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:47,859 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:47,994 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:48,066 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:48,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:48,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:48,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 5758 backedges. 739 proven. 244 refuted. 0 times theorem prover too weak. 4775 trivial. 0 not checked. [2020-07-21 19:44:49,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134304993] [2020-07-21 19:44:49,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:44:49,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:44:49,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876714771] [2020-07-21 19:44:49,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:44:49,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:49,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:44:49,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:44:49,446 INFO L87 Difference]: Start difference. First operand 217 states and 417 transitions. Second operand 17 states. [2020-07-21 19:44:49,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:49,851 INFO L93 Difference]: Finished difference Result 311 states and 584 transitions. [2020-07-21 19:44:49,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:44:49,851 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 451 [2020-07-21 19:44:49,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:49,856 INFO L225 Difference]: With dead ends: 311 [2020-07-21 19:44:49,857 INFO L226 Difference]: Without dead ends: 296 [2020-07-21 19:44:49,858 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 907 GetRequests, 873 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:44:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-07-21 19:44:49,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 208. [2020-07-21 19:44:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-21 19:44:49,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 384 transitions. [2020-07-21 19:44:49,875 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 384 transitions. Word has length 451 [2020-07-21 19:44:49,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:49,875 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 384 transitions. [2020-07-21 19:44:49,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:44:49,876 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 384 transitions. [2020-07-21 19:44:49,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-21 19:44:49,879 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:49,879 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 27, 25, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 12, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:50,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:50,080 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:50,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:50,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1846663377, now seen corresponding path program 40 times [2020-07-21 19:44:50,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:50,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1679459873] [2020-07-21 19:44:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:50,866 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:44:50,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:50,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:44:50,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:51,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5719 backedges. 810 proven. 133 refuted. 0 times theorem prover too weak. 4776 trivial. 0 not checked. [2020-07-21 19:44:51,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:44:52,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:52,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:52,995 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:53,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:53,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:53,379 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:53,462 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:53,602 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:54,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:55,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5719 backedges. 816 proven. 141 refuted. 0 times theorem prover too weak. 4762 trivial. 0 not checked. [2020-07-21 19:44:55,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1679459873] [2020-07-21 19:44:55,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:44:55,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:44:55,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040058007] [2020-07-21 19:44:55,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:44:55,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:44:55,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:44:55,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:44:55,084 INFO L87 Difference]: Start difference. First operand 208 states and 384 transitions. Second operand 17 states. [2020-07-21 19:44:55,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:44:55,509 INFO L93 Difference]: Finished difference Result 241 states and 443 transitions. [2020-07-21 19:44:55,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:44:55,510 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 449 [2020-07-21 19:44:55,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:44:55,514 INFO L225 Difference]: With dead ends: 241 [2020-07-21 19:44:55,514 INFO L226 Difference]: Without dead ends: 228 [2020-07-21 19:44:55,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 869 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:44:55,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-21 19:44:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 208. [2020-07-21 19:44:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-07-21 19:44:55,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 370 transitions. [2020-07-21 19:44:55,532 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 370 transitions. Word has length 449 [2020-07-21 19:44:55,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:44:55,532 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 370 transitions. [2020-07-21 19:44:55,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:44:55,532 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 370 transitions. [2020-07-21 19:44:55,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-21 19:44:55,536 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:44:55,536 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:44:55,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:55,737 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:44:55,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:44:55,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1538486435, now seen corresponding path program 41 times [2020-07-21 19:44:55,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:44:55,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045606410] [2020-07-21 19:44:55,739 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:44:56,541 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:44:56,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:44:56,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:44:56,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:44:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 671 proven. 157 refuted. 0 times theorem prover too weak. 5625 trivial. 0 not checked. [2020-07-21 19:44:56,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:44:58,001 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:58,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:58,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:58,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:58,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:58,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:44:59,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6453 backedges. 673 proven. 165 refuted. 0 times theorem prover too weak. 5615 trivial. 0 not checked. [2020-07-21 19:45:00,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045606410] [2020-07-21 19:45:00,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:45:00,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:45:00,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584857382] [2020-07-21 19:45:00,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:45:00,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:45:00,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:45:00,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:45:00,342 INFO L87 Difference]: Start difference. First operand 208 states and 370 transitions. Second operand 15 states. [2020-07-21 19:45:00,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:45:00,687 INFO L93 Difference]: Finished difference Result 256 states and 459 transitions. [2020-07-21 19:45:00,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:45:00,689 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 476 [2020-07-21 19:45:00,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:45:00,693 INFO L225 Difference]: With dead ends: 256 [2020-07-21 19:45:00,693 INFO L226 Difference]: Without dead ends: 243 [2020-07-21 19:45:00,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 927 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:45:00,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-07-21 19:45:00,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 203. [2020-07-21 19:45:00,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-07-21 19:45:00,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 356 transitions. [2020-07-21 19:45:00,711 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 356 transitions. Word has length 476 [2020-07-21 19:45:00,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:45:00,712 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 356 transitions. [2020-07-21 19:45:00,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:45:00,712 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 356 transitions. [2020-07-21 19:45:00,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2020-07-21 19:45:00,717 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:45:00,717 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 28, 28, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 10, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:45:00,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:00,919 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:45:00,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:45:00,920 INFO L82 PathProgramCache]: Analyzing trace with hash -227402005, now seen corresponding path program 42 times [2020-07-21 19:45:00,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:45:00,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037185308] [2020-07-21 19:45:00,921 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:01,715 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:45:01,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:45:01,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 1060 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:45:01,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:45:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 904 proven. 127 refuted. 0 times theorem prover too weak. 5449 trivial. 0 not checked. [2020-07-21 19:45:01,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:45:03,610 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:03,611 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:04,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:04,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:04,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:04,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:04,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:04,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:04,490 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:04,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:04,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:05,238 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:06,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6480 backedges. 904 proven. 145 refuted. 0 times theorem prover too weak. 5431 trivial. 0 not checked. [2020-07-21 19:45:06,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037185308] [2020-07-21 19:45:06,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:45:06,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:45:06,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872271576] [2020-07-21 19:45:06,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:45:06,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:45:06,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:45:06,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:45:06,373 INFO L87 Difference]: Start difference. First operand 203 states and 356 transitions. Second operand 17 states. [2020-07-21 19:45:06,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:45:06,856 INFO L93 Difference]: Finished difference Result 216 states and 368 transitions. [2020-07-21 19:45:06,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:45:06,857 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 477 [2020-07-21 19:45:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:45:06,860 INFO L225 Difference]: With dead ends: 216 [2020-07-21 19:45:06,860 INFO L226 Difference]: Without dead ends: 203 [2020-07-21 19:45:06,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 959 GetRequests, 925 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:45:06,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-07-21 19:45:06,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 194. [2020-07-21 19:45:06,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-07-21 19:45:06,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 337 transitions. [2020-07-21 19:45:06,876 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 337 transitions. Word has length 477 [2020-07-21 19:45:06,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:45:06,876 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 337 transitions. [2020-07-21 19:45:06,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:45:06,876 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 337 transitions. [2020-07-21 19:45:06,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 19:45:06,879 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:45:06,880 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:45:07,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:07,081 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:45:07,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:45:07,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1307627476, now seen corresponding path program 43 times [2020-07-21 19:45:07,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:45:07,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382979448] [2020-07-21 19:45:07,082 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:07,887 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:45:07,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:45:07,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:45:07,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:45:08,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 604 proven. 202 refuted. 0 times theorem prover too weak. 5276 trivial. 0 not checked. [2020-07-21 19:45:08,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:45:09,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:09,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:09,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:10,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:10,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:10,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:10,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:10,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:10,716 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 604 proven. 212 refuted. 0 times theorem prover too weak. 5266 trivial. 0 not checked. [2020-07-21 19:45:11,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382979448] [2020-07-21 19:45:11,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:45:11,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:45:11,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281969448] [2020-07-21 19:45:11,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:45:11,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:45:11,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:45:11,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:45:11,752 INFO L87 Difference]: Start difference. First operand 194 states and 337 transitions. Second operand 15 states. [2020-07-21 19:45:12,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:45:12,036 INFO L93 Difference]: Finished difference Result 222 states and 374 transitions. [2020-07-21 19:45:12,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:45:12,038 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 463 [2020-07-21 19:45:12,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:45:12,041 INFO L225 Difference]: With dead ends: 222 [2020-07-21 19:45:12,042 INFO L226 Difference]: Without dead ends: 207 [2020-07-21 19:45:12,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 901 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:45:12,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-07-21 19:45:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 191. [2020-07-21 19:45:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-07-21 19:45:12,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 332 transitions. [2020-07-21 19:45:12,057 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 332 transitions. Word has length 463 [2020-07-21 19:45:12,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:45:12,057 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 332 transitions. [2020-07-21 19:45:12,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:45:12,057 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 332 transitions. [2020-07-21 19:45:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-21 19:45:12,060 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:45:12,060 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:45:12,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:12,261 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:45:12,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:45:12,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1326629730, now seen corresponding path program 44 times [2020-07-21 19:45:12,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:45:12,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344734652] [2020-07-21 19:45:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:13,068 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:45:13,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:45:13,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 271 conjunts are in the unsatisfiable core [2020-07-21 19:45:13,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:45:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2020-07-21 19:45:14,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:45:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2020-07-21 19:45:25,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344734652] [2020-07-21 19:45:25,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:45:25,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 52 [2020-07-21 19:45:25,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781344056] [2020-07-21 19:45:25,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-21 19:45:25,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:45:25,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-21 19:45:25,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-07-21 19:45:25,504 INFO L87 Difference]: Start difference. First operand 191 states and 332 transitions. Second operand 52 states. [2020-07-21 19:45:28,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:45:28,449 INFO L93 Difference]: Finished difference Result 457 states and 1011 transitions. [2020-07-21 19:45:28,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-21 19:45:28,450 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 463 [2020-07-21 19:45:28,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:45:28,464 INFO L225 Difference]: With dead ends: 457 [2020-07-21 19:45:28,464 INFO L226 Difference]: Without dead ends: 450 [2020-07-21 19:45:28,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 932 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=153, Invalid=3269, Unknown=0, NotChecked=0, Total=3422 [2020-07-21 19:45:28,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-07-21 19:45:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 304. [2020-07-21 19:45:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-07-21 19:45:28,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 684 transitions. [2020-07-21 19:45:28,530 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 684 transitions. Word has length 463 [2020-07-21 19:45:28,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:45:28,530 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 684 transitions. [2020-07-21 19:45:28,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-21 19:45:28,530 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 684 transitions. [2020-07-21 19:45:28,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-07-21 19:45:28,540 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:45:28,541 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 29, 28, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 13, 9, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:45:28,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:28,746 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:45:28,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:45:28,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2079684088, now seen corresponding path program 45 times [2020-07-21 19:45:28,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:45:28,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325102835] [2020-07-21 19:45:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:29,580 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:45:29,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:45:29,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 1089 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:45:29,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:45:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6872 backedges. 394 proven. 827 refuted. 0 times theorem prover too weak. 5651 trivial. 0 not checked. [2020-07-21 19:45:29,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:45:33,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:33,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:34,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:35,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:35,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:35,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:35,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:35,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:35,695 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:35,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:35,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6872 backedges. 400 proven. 845 refuted. 0 times theorem prover too weak. 5627 trivial. 0 not checked. [2020-07-21 19:45:36,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325102835] [2020-07-21 19:45:36,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:45:36,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:45:36,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838792315] [2020-07-21 19:45:36,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:45:36,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:45:36,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:45:36,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:45:36,267 INFO L87 Difference]: Start difference. First operand 304 states and 684 transitions. Second operand 19 states. [2020-07-21 19:45:36,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:45:36,706 INFO L93 Difference]: Finished difference Result 361 states and 795 transitions. [2020-07-21 19:45:36,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:45:36,708 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 490 [2020-07-21 19:45:36,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:45:36,715 INFO L225 Difference]: With dead ends: 361 [2020-07-21 19:45:36,715 INFO L226 Difference]: Without dead ends: 344 [2020-07-21 19:45:36,718 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 947 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:45:36,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-07-21 19:45:36,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 309. [2020-07-21 19:45:36,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2020-07-21 19:45:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 700 transitions. [2020-07-21 19:45:36,767 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 700 transitions. Word has length 490 [2020-07-21 19:45:36,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:45:36,767 INFO L479 AbstractCegarLoop]: Abstraction has 309 states and 700 transitions. [2020-07-21 19:45:36,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:45:36,768 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 700 transitions. [2020-07-21 19:45:36,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-07-21 19:45:36,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:45:36,779 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 29, 28, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 11, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:45:36,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:36,992 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:45:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:45:36,993 INFO L82 PathProgramCache]: Analyzing trace with hash 282736823, now seen corresponding path program 46 times [2020-07-21 19:45:36,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:45:36,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025370408] [2020-07-21 19:45:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:37,877 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:45:37,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:45:37,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 1116 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:45:37,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:45:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 7192 backedges. 1077 proven. 186 refuted. 0 times theorem prover too weak. 5929 trivial. 0 not checked. [2020-07-21 19:45:38,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:45:40,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:40,706 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:41,417 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:41,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:41,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:41,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:42,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:42,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:42,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:42,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:42,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:42,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:44,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7192 backedges. 1077 proven. 210 refuted. 0 times theorem prover too weak. 5905 trivial. 0 not checked. [2020-07-21 19:45:44,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025370408] [2020-07-21 19:45:44,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:45:44,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:45:44,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304188343] [2020-07-21 19:45:44,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:45:44,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:45:44,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:45:44,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:45:44,325 INFO L87 Difference]: Start difference. First operand 309 states and 700 transitions. Second operand 19 states. [2020-07-21 19:45:45,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:45:45,071 INFO L93 Difference]: Finished difference Result 392 states and 894 transitions. [2020-07-21 19:45:45,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:45:45,073 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 502 [2020-07-21 19:45:45,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:45:45,082 INFO L225 Difference]: With dead ends: 392 [2020-07-21 19:45:45,082 INFO L226 Difference]: Without dead ends: 376 [2020-07-21 19:45:45,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 971 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:45:45,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-07-21 19:45:45,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 307. [2020-07-21 19:45:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-07-21 19:45:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 710 transitions. [2020-07-21 19:45:45,130 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 710 transitions. Word has length 502 [2020-07-21 19:45:45,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:45:45,131 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 710 transitions. [2020-07-21 19:45:45,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:45:45,131 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 710 transitions. [2020-07-21 19:45:45,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2020-07-21 19:45:45,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:45:45,140 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 35, 35, 28, 27, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 12, 11, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:45:45,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:45,352 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:45:45,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:45:45,353 INFO L82 PathProgramCache]: Analyzing trace with hash 876197022, now seen corresponding path program 47 times [2020-07-21 19:45:45,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:45:45,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440802479] [2020-07-21 19:45:45,354 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:46,232 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:45:46,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:45:46,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:45:46,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:45:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 7533 backedges. 969 proven. 145 refuted. 0 times theorem prover too weak. 6419 trivial. 0 not checked. [2020-07-21 19:45:46,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:45:48,382 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:48,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:48,805 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:49,124 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:49,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:49,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:49,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:49,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:49,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:49,689 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:50,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:52,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7533 backedges. 971 proven. 161 refuted. 0 times theorem prover too weak. 6401 trivial. 0 not checked. [2020-07-21 19:45:52,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440802479] [2020-07-21 19:45:52,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:45:52,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:45:52,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589699825] [2020-07-21 19:45:52,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:45:52,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:45:52,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:45:52,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:45:52,346 INFO L87 Difference]: Start difference. First operand 307 states and 710 transitions. Second operand 17 states. [2020-07-21 19:45:52,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:45:52,890 INFO L93 Difference]: Finished difference Result 373 states and 832 transitions. [2020-07-21 19:45:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:45:52,891 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 512 [2020-07-21 19:45:52,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:45:52,898 INFO L225 Difference]: With dead ends: 373 [2020-07-21 19:45:52,898 INFO L226 Difference]: Without dead ends: 360 [2020-07-21 19:45:52,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 995 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:45:52,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-07-21 19:45:52,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 299. [2020-07-21 19:45:52,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-07-21 19:45:52,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 670 transitions. [2020-07-21 19:45:52,947 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 670 transitions. Word has length 512 [2020-07-21 19:45:52,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:45:52,948 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 670 transitions. [2020-07-21 19:45:52,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:45:52,948 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 670 transitions. [2020-07-21 19:45:52,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2020-07-21 19:45:52,959 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:45:52,959 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 42, 42, 29, 27, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 16, 15, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:45:53,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:53,173 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:45:53,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:45:53,174 INFO L82 PathProgramCache]: Analyzing trace with hash -801964564, now seen corresponding path program 48 times [2020-07-21 19:45:53,175 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:45:53,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019022228] [2020-07-21 19:45:53,175 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:45:54,175 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:45:54,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:45:54,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:45:54,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:45:54,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9925 backedges. 399 proven. 1167 refuted. 0 times theorem prover too weak. 8359 trivial. 0 not checked. [2020-07-21 19:45:54,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:45:58,476 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:59,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:45:59,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:00,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:00,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:00,998 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:01,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:01,195 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:01,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:01,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:01,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:01,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:01,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9925 backedges. 405 proven. 1182 refuted. 0 times theorem prover too weak. 8338 trivial. 0 not checked. [2020-07-21 19:46:01,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019022228] [2020-07-21 19:46:01,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:01,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:46:01,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423518675] [2020-07-21 19:46:01,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:46:01,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:01,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:46:01,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:46:01,878 INFO L87 Difference]: Start difference. First operand 299 states and 670 transitions. Second operand 19 states. [2020-07-21 19:46:02,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:02,682 INFO L93 Difference]: Finished difference Result 413 states and 945 transitions. [2020-07-21 19:46:02,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:46:02,684 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 585 [2020-07-21 19:46:02,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:02,691 INFO L225 Difference]: With dead ends: 413 [2020-07-21 19:46:02,691 INFO L226 Difference]: Without dead ends: 332 [2020-07-21 19:46:02,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1176 GetRequests, 1137 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:46:02,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-07-21 19:46:02,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 308. [2020-07-21 19:46:02,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-07-21 19:46:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 679 transitions. [2020-07-21 19:46:02,739 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 679 transitions. Word has length 585 [2020-07-21 19:46:02,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:02,740 INFO L479 AbstractCegarLoop]: Abstraction has 308 states and 679 transitions. [2020-07-21 19:46:02,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:46:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 679 transitions. [2020-07-21 19:46:02,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2020-07-21 19:46:02,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:02,747 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 27, 27, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:02,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:02,948 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:02,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:02,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1615604379, now seen corresponding path program 49 times [2020-07-21 19:46:02,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:02,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720967377] [2020-07-21 19:46:02,949 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:03,958 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:46:03,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:03,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 19:46:03,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7846 backedges. 412 proven. 789 refuted. 0 times theorem prover too weak. 6645 trivial. 0 not checked. [2020-07-21 19:46:04,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:07,833 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:07,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:09,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:09,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:09,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:09,582 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:09,791 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:09,792 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:09,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:09,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:10,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:10,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:10,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7846 backedges. 414 proven. 801 refuted. 0 times theorem prover too weak. 6631 trivial. 0 not checked. [2020-07-21 19:46:10,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720967377] [2020-07-21 19:46:10,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:10,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 19:46:10,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919014168] [2020-07-21 19:46:10,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:46:10,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:10,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:46:10,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:46:10,626 INFO L87 Difference]: Start difference. First operand 308 states and 679 transitions. Second operand 19 states. [2020-07-21 19:46:11,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:11,131 INFO L93 Difference]: Finished difference Result 366 states and 760 transitions. [2020-07-21 19:46:11,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:46:11,134 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 523 [2020-07-21 19:46:11,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:11,139 INFO L225 Difference]: With dead ends: 366 [2020-07-21 19:46:11,139 INFO L226 Difference]: Without dead ends: 338 [2020-07-21 19:46:11,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1051 GetRequests, 1015 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:46:11,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-07-21 19:46:11,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 311. [2020-07-21 19:46:11,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 311 states. [2020-07-21 19:46:11,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 682 transitions. [2020-07-21 19:46:11,180 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 682 transitions. Word has length 523 [2020-07-21 19:46:11,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:11,181 INFO L479 AbstractCegarLoop]: Abstraction has 311 states and 682 transitions. [2020-07-21 19:46:11,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:46:11,181 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 682 transitions. [2020-07-21 19:46:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2020-07-21 19:46:11,191 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:11,191 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 27, 27, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 14, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:11,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:11,405 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:11,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:11,406 INFO L82 PathProgramCache]: Analyzing trace with hash 2040593419, now seen corresponding path program 50 times [2020-07-21 19:46:11,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:11,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769649697] [2020-07-21 19:46:11,407 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:12,320 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:46:12,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:12,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 1218 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:46:12,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 8622 backedges. 1108 proven. 275 refuted. 0 times theorem prover too weak. 7239 trivial. 0 not checked. [2020-07-21 19:46:12,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:15,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:15,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:16,328 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:16,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:16,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:16,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:17,082 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:17,083 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:17,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:17,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:17,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:17,364 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:17,526 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:18,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8622 backedges. 1108 proven. 301 refuted. 0 times theorem prover too weak. 7213 trivial. 0 not checked. [2020-07-21 19:46:20,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769649697] [2020-07-21 19:46:20,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:20,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:46:20,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858971212] [2020-07-21 19:46:20,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:46:20,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:20,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:46:20,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:46:20,246 INFO L87 Difference]: Start difference. First operand 311 states and 682 transitions. Second operand 19 states. [2020-07-21 19:46:20,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:20,953 INFO L93 Difference]: Finished difference Result 353 states and 756 transitions. [2020-07-21 19:46:20,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:46:20,953 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 547 [2020-07-21 19:46:20,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:20,960 INFO L225 Difference]: With dead ends: 353 [2020-07-21 19:46:20,960 INFO L226 Difference]: Without dead ends: 330 [2020-07-21 19:46:20,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1100 GetRequests, 1061 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:46:20,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-07-21 19:46:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 298. [2020-07-21 19:46:21,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-07-21 19:46:21,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 621 transitions. [2020-07-21 19:46:21,007 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 621 transitions. Word has length 547 [2020-07-21 19:46:21,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:21,008 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 621 transitions. [2020-07-21 19:46:21,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:46:21,008 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 621 transitions. [2020-07-21 19:46:21,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 19:46:21,016 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:21,017 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 34, 34, 27, 27, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 12, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:21,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:21,231 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:21,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:21,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1329398441, now seen corresponding path program 51 times [2020-07-21 19:46:21,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:21,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439086357] [2020-07-21 19:46:21,233 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:22,167 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:46:22,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:22,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 19:46:22,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 7138 backedges. 299 proven. 842 refuted. 0 times theorem prover too weak. 5997 trivial. 0 not checked. [2020-07-21 19:46:22,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:25,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:25,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:27,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:27,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:27,899 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:28,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:28,314 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:28,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:28,437 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:28,503 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:28,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7138 backedges. 303 proven. 852 refuted. 0 times theorem prover too weak. 5983 trivial. 0 not checked. [2020-07-21 19:46:28,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439086357] [2020-07-21 19:46:28,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:28,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 19:46:28,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917344632] [2020-07-21 19:46:28,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:46:28,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:28,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:46:28,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:46:28,698 INFO L87 Difference]: Start difference. First operand 298 states and 621 transitions. Second operand 19 states. [2020-07-21 19:46:29,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:29,154 INFO L93 Difference]: Finished difference Result 397 states and 842 transitions. [2020-07-21 19:46:29,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:46:29,155 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 499 [2020-07-21 19:46:29,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:29,162 INFO L225 Difference]: With dead ends: 397 [2020-07-21 19:46:29,162 INFO L226 Difference]: Without dead ends: 331 [2020-07-21 19:46:29,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1003 GetRequests, 967 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:46:29,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-07-21 19:46:29,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 298. [2020-07-21 19:46:29,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-07-21 19:46:29,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 621 transitions. [2020-07-21 19:46:29,202 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 621 transitions. Word has length 499 [2020-07-21 19:46:29,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:29,203 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 621 transitions. [2020-07-21 19:46:29,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:46:29,203 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 621 transitions. [2020-07-21 19:46:29,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 511 [2020-07-21 19:46:29,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:29,211 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 27, 26, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 11, 11, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:29,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:29,425 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:29,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:29,426 INFO L82 PathProgramCache]: Analyzing trace with hash -983011824, now seen corresponding path program 52 times [2020-07-21 19:46:29,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:29,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018075004] [2020-07-21 19:46:29,427 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:30,358 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:46:30,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:30,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 1135 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:46:30,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 7448 backedges. 763 proven. 133 refuted. 0 times theorem prover too weak. 6552 trivial. 0 not checked. [2020-07-21 19:46:30,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:32,458 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:32,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:32,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:32,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:32,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:32,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:33,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:33,022 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:33,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:33,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:33,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 7448 backedges. 765 proven. 141 refuted. 0 times theorem prover too weak. 6542 trivial. 0 not checked. [2020-07-21 19:46:35,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018075004] [2020-07-21 19:46:35,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:35,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:46:35,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359856987] [2020-07-21 19:46:35,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:46:35,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:35,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:46:35,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:46:35,437 INFO L87 Difference]: Start difference. First operand 298 states and 621 transitions. Second operand 15 states. [2020-07-21 19:46:35,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:35,902 INFO L93 Difference]: Finished difference Result 346 states and 735 transitions. [2020-07-21 19:46:35,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:46:35,905 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 510 [2020-07-21 19:46:35,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:35,911 INFO L225 Difference]: With dead ends: 346 [2020-07-21 19:46:35,911 INFO L226 Difference]: Without dead ends: 330 [2020-07-21 19:46:35,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1024 GetRequests, 995 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:46:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-07-21 19:46:35,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 289. [2020-07-21 19:46:35,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-07-21 19:46:35,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 606 transitions. [2020-07-21 19:46:35,940 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 606 transitions. Word has length 510 [2020-07-21 19:46:35,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:35,941 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 606 transitions. [2020-07-21 19:46:35,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:46:35,941 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 606 transitions. [2020-07-21 19:46:35,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-21 19:46:35,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:35,946 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 34, 34, 28, 27, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 11, 11, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:36,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:36,147 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:36,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:36,148 INFO L82 PathProgramCache]: Analyzing trace with hash -76829709, now seen corresponding path program 53 times [2020-07-21 19:46:36,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:36,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295478068] [2020-07-21 19:46:36,149 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:37,158 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:46:37,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:37,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-21 19:46:37,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 7165 backedges. 788 proven. 119 refuted. 0 times theorem prover too weak. 6258 trivial. 0 not checked. [2020-07-21 19:46:37,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:39,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:39,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:39,530 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:39,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:39,642 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:39,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:39,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:40,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:42,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7165 backedges. 788 proven. 133 refuted. 0 times theorem prover too weak. 6244 trivial. 0 not checked. [2020-07-21 19:46:42,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295478068] [2020-07-21 19:46:42,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:42,117 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-21 19:46:42,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680457365] [2020-07-21 19:46:42,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-21 19:46:42,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:42,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-21 19:46:42,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-21 19:46:42,118 INFO L87 Difference]: Start difference. First operand 289 states and 606 transitions. Second operand 15 states. [2020-07-21 19:46:42,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:42,571 INFO L93 Difference]: Finished difference Result 305 states and 622 transitions. [2020-07-21 19:46:42,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 19:46:42,572 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 500 [2020-07-21 19:46:42,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:42,575 INFO L225 Difference]: With dead ends: 305 [2020-07-21 19:46:42,575 INFO L226 Difference]: Without dead ends: 292 [2020-07-21 19:46:42,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 975 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-21 19:46:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-07-21 19:46:42,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 286. [2020-07-21 19:46:42,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-07-21 19:46:42,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 600 transitions. [2020-07-21 19:46:42,603 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 600 transitions. Word has length 500 [2020-07-21 19:46:42,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:42,604 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 600 transitions. [2020-07-21 19:46:42,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-21 19:46:42,604 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 600 transitions. [2020-07-21 19:46:42,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 19:46:42,609 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:42,609 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 27, 27, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 11, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:42,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:42,810 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:42,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:42,811 INFO L82 PathProgramCache]: Analyzing trace with hash 24076713, now seen corresponding path program 54 times [2020-07-21 19:46:42,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:42,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485482917] [2020-07-21 19:46:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:43,764 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:46:43,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:43,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 19:46:43,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 7122 backedges. 406 proven. 904 refuted. 0 times theorem prover too weak. 5812 trivial. 0 not checked. [2020-07-21 19:46:44,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:48,010 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-21 19:46:48,309 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:49,757 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:50,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:50,338 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:50,826 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:50,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:51,070 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:51,071 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:51,235 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:51,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:51,507 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7122 backedges. 405 proven. 926 refuted. 0 times theorem prover too weak. 5791 trivial. 0 not checked. [2020-07-21 19:46:51,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485482917] [2020-07-21 19:46:51,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:46:51,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 19:46:51,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142899906] [2020-07-21 19:46:51,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:46:51,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:46:51,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:46:51,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:46:51,863 INFO L87 Difference]: Start difference. First operand 286 states and 600 transitions. Second operand 21 states. [2020-07-21 19:46:52,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:46:52,480 INFO L93 Difference]: Finished difference Result 350 states and 731 transitions. [2020-07-21 19:46:52,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:46:52,481 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 499 [2020-07-21 19:46:52,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:46:52,488 INFO L225 Difference]: With dead ends: 350 [2020-07-21 19:46:52,488 INFO L226 Difference]: Without dead ends: 333 [2020-07-21 19:46:52,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 963 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 19:46:52,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-07-21 19:46:52,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 286. [2020-07-21 19:46:52,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-07-21 19:46:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 600 transitions. [2020-07-21 19:46:52,518 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 600 transitions. Word has length 499 [2020-07-21 19:46:52,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:46:52,519 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 600 transitions. [2020-07-21 19:46:52,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:46:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 600 transitions. [2020-07-21 19:46:52,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2020-07-21 19:46:52,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:46:52,524 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 27, 27, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:46:52,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:52,725 INFO L427 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:46:52,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:46:52,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1864588169, now seen corresponding path program 55 times [2020-07-21 19:46:52,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:46:52,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474058185] [2020-07-21 19:46:52,726 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:46:53,689 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:46:53,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:46:53,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 19:46:53,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:46:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7846 backedges. 599 proven. 602 refuted. 0 times theorem prover too weak. 6645 trivial. 0 not checked. [2020-07-21 19:46:54,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:46:58,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:58,282 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:58,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:59,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:59,042 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:59,233 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:59,234 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:59,375 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:59,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:46:59,572 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:00,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7846 backedges. 599 proven. 616 refuted. 0 times theorem prover too weak. 6631 trivial. 0 not checked. [2020-07-21 19:47:00,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474058185] [2020-07-21 19:47:00,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:47:00,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 19:47:00,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503665635] [2020-07-21 19:47:00,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:47:00,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:47:00,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:47:00,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:47:00,936 INFO L87 Difference]: Start difference. First operand 286 states and 600 transitions. Second operand 19 states. [2020-07-21 19:47:01,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:47:01,669 INFO L93 Difference]: Finished difference Result 316 states and 637 transitions. [2020-07-21 19:47:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:47:01,672 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 523 [2020-07-21 19:47:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:47:01,677 INFO L225 Difference]: With dead ends: 316 [2020-07-21 19:47:01,677 INFO L226 Difference]: Without dead ends: 304 [2020-07-21 19:47:01,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1051 GetRequests, 1015 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:47:01,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-07-21 19:47:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 289. [2020-07-21 19:47:01,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-07-21 19:47:01,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 607 transitions. [2020-07-21 19:47:01,705 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 607 transitions. Word has length 523 [2020-07-21 19:47:01,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:47:01,705 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 607 transitions. [2020-07-21 19:47:01,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:47:01,706 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 607 transitions. [2020-07-21 19:47:01,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-21 19:47:01,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:47:01,711 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 35, 35, 27, 27, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:47:01,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:47:01,912 INFO L427 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:47:01,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:47:01,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1005554592, now seen corresponding path program 56 times [2020-07-21 19:47:01,913 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:47:01,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297048601] [2020-07-21 19:47:01,914 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:47:02,892 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:47:02,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:47:02,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 19:47:02,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:47:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7506 backedges. 476 proven. 508 refuted. 0 times theorem prover too weak. 6522 trivial. 0 not checked. [2020-07-21 19:47:03,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:47:06,612 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:06,968 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:07,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:07,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:07,426 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:07,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:07,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7506 backedges. 476 proven. 518 refuted. 0 times theorem prover too weak. 6512 trivial. 0 not checked. [2020-07-21 19:47:08,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297048601] [2020-07-21 19:47:08,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:47:08,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 19:47:08,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631977065] [2020-07-21 19:47:08,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:47:08,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:47:08,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:47:08,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:47:08,771 INFO L87 Difference]: Start difference. First operand 289 states and 607 transitions. Second operand 17 states. [2020-07-21 19:47:09,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:47:09,326 INFO L93 Difference]: Finished difference Result 349 states and 685 transitions. [2020-07-21 19:47:09,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:47:09,329 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 511 [2020-07-21 19:47:09,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:47:09,334 INFO L225 Difference]: With dead ends: 349 [2020-07-21 19:47:09,334 INFO L226 Difference]: Without dead ends: 332 [2020-07-21 19:47:09,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1026 GetRequests, 995 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:47:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-07-21 19:47:09,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 289. [2020-07-21 19:47:09,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-07-21 19:47:09,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 607 transitions. [2020-07-21 19:47:09,377 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 607 transitions. Word has length 511 [2020-07-21 19:47:09,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:47:09,377 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 607 transitions. [2020-07-21 19:47:09,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:47:09,377 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 607 transitions. [2020-07-21 19:47:09,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2020-07-21 19:47:09,383 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:47:09,383 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 27, 27, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 11, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:47:09,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:47:09,584 INFO L427 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:47:09,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:47:09,585 INFO L82 PathProgramCache]: Analyzing trace with hash 803202537, now seen corresponding path program 57 times [2020-07-21 19:47:09,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:47:09,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743022683] [2020-07-21 19:47:09,586 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:47:10,558 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:47:10,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:47:10,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 19:47:10,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:47:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7846 backedges. 338 proven. 1044 refuted. 0 times theorem prover too weak. 6464 trivial. 0 not checked. [2020-07-21 19:47:11,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:47:16,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:16,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:17,830 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:17,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:18,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:19,275 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:19,556 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:19,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:19,733 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:19,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:20,261 INFO L134 CoverageAnalysis]: Checked inductivity of 7846 backedges. 337 proven. 1066 refuted. 0 times theorem prover too weak. 6443 trivial. 0 not checked. [2020-07-21 19:47:20,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743022683] [2020-07-21 19:47:20,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:47:20,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 19:47:20,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305551465] [2020-07-21 19:47:20,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:47:20,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:47:20,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:47:20,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:47:20,263 INFO L87 Difference]: Start difference. First operand 289 states and 607 transitions. Second operand 21 states. [2020-07-21 19:47:21,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:47:21,239 INFO L93 Difference]: Finished difference Result 364 states and 759 transitions. [2020-07-21 19:47:21,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:47:21,242 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 523 [2020-07-21 19:47:21,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:47:21,248 INFO L225 Difference]: With dead ends: 364 [2020-07-21 19:47:21,248 INFO L226 Difference]: Without dead ends: 298 [2020-07-21 19:47:21,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1052 GetRequests, 1011 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 19:47:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-07-21 19:47:21,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 284. [2020-07-21 19:47:21,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-07-21 19:47:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 579 transitions. [2020-07-21 19:47:21,279 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 579 transitions. Word has length 523 [2020-07-21 19:47:21,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:47:21,280 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 579 transitions. [2020-07-21 19:47:21,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:47:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 579 transitions. [2020-07-21 19:47:21,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 19:47:21,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:47:21,285 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 27, 27, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 11, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:47:21,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:47:21,486 INFO L427 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:47:21,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:47:21,487 INFO L82 PathProgramCache]: Analyzing trace with hash 181794939, now seen corresponding path program 58 times [2020-07-21 19:47:21,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:47:21,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375680151] [2020-07-21 19:47:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:47:22,478 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:47:22,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:47:22,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 19:47:22,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:47:22,745 INFO L134 CoverageAnalysis]: Checked inductivity of 7122 backedges. 277 proven. 1033 refuted. 0 times theorem prover too weak. 5812 trivial. 0 not checked. [2020-07-21 19:47:22,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:47:24,686 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-07-21 19:47:27,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:27,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:29,327 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:30,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:30,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:30,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:30,478 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:30,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:30,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:30,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:30,852 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:31,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7122 backedges. 278 proven. 1053 refuted. 0 times theorem prover too weak. 5791 trivial. 0 not checked. [2020-07-21 19:47:31,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375680151] [2020-07-21 19:47:31,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:47:31,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 19:47:31,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244604430] [2020-07-21 19:47:31,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:47:31,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:47:31,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:47:31,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:47:31,253 INFO L87 Difference]: Start difference. First operand 284 states and 579 transitions. Second operand 21 states. [2020-07-21 19:47:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:47:32,542 INFO L93 Difference]: Finished difference Result 461 states and 955 transitions. [2020-07-21 19:47:32,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:47:32,545 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 499 [2020-07-21 19:47:32,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:47:32,552 INFO L225 Difference]: With dead ends: 461 [2020-07-21 19:47:32,552 INFO L226 Difference]: Without dead ends: 287 [2020-07-21 19:47:32,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 963 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 19:47:32,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-07-21 19:47:32,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-07-21 19:47:32,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-07-21 19:47:32,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 564 transitions. [2020-07-21 19:47:32,595 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 564 transitions. Word has length 499 [2020-07-21 19:47:32,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:47:32,596 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 564 transitions. [2020-07-21 19:47:32,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:47:32,596 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 564 transitions. [2020-07-21 19:47:32,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 19:47:32,602 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:47:32,602 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:47:32,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:47:32,803 INFO L427 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:47:32,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:47:32,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2079145492, now seen corresponding path program 59 times [2020-07-21 19:47:32,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:47:32,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465659702] [2020-07-21 19:47:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:47:33,811 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:47:33,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:47:33,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 19:47:33,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:47:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 367 proven. 742 refuted. 0 times theorem prover too weak. 5657 trivial. 0 not checked. [2020-07-21 19:47:34,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:47:35,902 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-07-21 19:47:37,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:39,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:39,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:40,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:40,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:40,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:40,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:40,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:40,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 369 proven. 756 refuted. 0 times theorem prover too weak. 5641 trivial. 0 not checked. [2020-07-21 19:47:41,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465659702] [2020-07-21 19:47:41,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:47:41,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 19:47:41,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520520610] [2020-07-21 19:47:41,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:47:41,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:47:41,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:47:41,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:47:41,143 INFO L87 Difference]: Start difference. First operand 287 states and 564 transitions. Second operand 19 states. [2020-07-21 19:47:41,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:47:41,983 INFO L93 Difference]: Finished difference Result 383 states and 775 transitions. [2020-07-21 19:47:41,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:47:41,986 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-21 19:47:41,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:47:41,992 INFO L225 Difference]: With dead ends: 383 [2020-07-21 19:47:41,992 INFO L226 Difference]: Without dead ends: 356 [2020-07-21 19:47:41,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:47:41,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-07-21 19:47:42,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 284. [2020-07-21 19:47:42,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-07-21 19:47:42,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 559 transitions. [2020-07-21 19:47:42,023 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 559 transitions. Word has length 487 [2020-07-21 19:47:42,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:47:42,023 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 559 transitions. [2020-07-21 19:47:42,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:47:42,023 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 559 transitions. [2020-07-21 19:47:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 19:47:42,028 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:47:42,028 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 28, 27, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 12, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:47:42,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:47:42,229 INFO L427 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:47:42,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:47:42,230 INFO L82 PathProgramCache]: Analyzing trace with hash -456845704, now seen corresponding path program 60 times [2020-07-21 19:47:42,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:47:42,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297446995] [2020-07-21 19:47:42,231 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:47:43,219 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:47:43,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:47:43,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-21 19:47:43,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:47:43,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6817 backedges. 807 proven. 251 refuted. 0 times theorem prover too weak. 5759 trivial. 0 not checked. [2020-07-21 19:47:43,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:47:46,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:46,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:47,160 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:47,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:47,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:47,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:47,935 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:48,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:48,184 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:48,895 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6817 backedges. 809 proven. 267 refuted. 0 times theorem prover too weak. 5741 trivial. 0 not checked. [2020-07-21 19:47:50,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297446995] [2020-07-21 19:47:50,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:47:50,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-21 19:47:50,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950557725] [2020-07-21 19:47:50,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:47:50,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:47:50,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:47:50,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:47:50,542 INFO L87 Difference]: Start difference. First operand 284 states and 559 transitions. Second operand 17 states. [2020-07-21 19:47:50,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:47:50,950 INFO L93 Difference]: Finished difference Result 328 states and 613 transitions. [2020-07-21 19:47:50,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:47:50,950 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 488 [2020-07-21 19:47:50,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:47:50,955 INFO L225 Difference]: With dead ends: 328 [2020-07-21 19:47:50,955 INFO L226 Difference]: Without dead ends: 305 [2020-07-21 19:47:50,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 947 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:47:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-07-21 19:47:50,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 284. [2020-07-21 19:47:50,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-07-21 19:47:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 555 transitions. [2020-07-21 19:47:50,981 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 555 transitions. Word has length 488 [2020-07-21 19:47:50,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:47:50,981 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 555 transitions. [2020-07-21 19:47:50,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:47:50,982 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 555 transitions. [2020-07-21 19:47:50,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 19:47:50,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:47:50,986 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:47:51,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:47:51,187 INFO L427 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:47:51,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:47:51,188 INFO L82 PathProgramCache]: Analyzing trace with hash -855524837, now seen corresponding path program 61 times [2020-07-21 19:47:51,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:47:51,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112306358] [2020-07-21 19:47:51,189 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:47:52,239 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:47:52,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:47:52,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 19:47:52,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:47:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 847 proven. 232 refuted. 0 times theorem prover too weak. 5335 trivial. 0 not checked. [2020-07-21 19:47:52,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:47:55,033 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:55,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:55,851 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:56,183 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:56,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:56,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:56,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:57,299 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:47:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 845 proven. 250 refuted. 0 times theorem prover too weak. 5319 trivial. 0 not checked. [2020-07-21 19:47:58,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112306358] [2020-07-21 19:47:58,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:47:58,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 19:47:58,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695767762] [2020-07-21 19:47:58,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:47:58,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:47:58,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:47:58,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:47:58,681 INFO L87 Difference]: Start difference. First operand 284 states and 555 transitions. Second operand 19 states. [2020-07-21 19:47:59,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:47:59,310 INFO L93 Difference]: Finished difference Result 311 states and 589 transitions. [2020-07-21 19:47:59,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:47:59,311 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 475 [2020-07-21 19:47:59,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:47:59,315 INFO L225 Difference]: With dead ends: 311 [2020-07-21 19:47:59,315 INFO L226 Difference]: Without dead ends: 296 [2020-07-21 19:47:59,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 919 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:47:59,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-07-21 19:47:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 284. [2020-07-21 19:47:59,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-07-21 19:47:59,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 555 transitions. [2020-07-21 19:47:59,343 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 555 transitions. Word has length 475 [2020-07-21 19:47:59,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:47:59,344 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 555 transitions. [2020-07-21 19:47:59,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:47:59,344 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 555 transitions. [2020-07-21 19:47:59,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-21 19:47:59,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:47:59,349 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 27, 27, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 11, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:47:59,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:47:59,550 INFO L427 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:47:59,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:47:59,550 INFO L82 PathProgramCache]: Analyzing trace with hash -915524613, now seen corresponding path program 62 times [2020-07-21 19:47:59,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:47:59,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077715671] [2020-07-21 19:47:59,551 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:48:00,623 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:48:00,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:48:00,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 19:48:00,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:48:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7122 backedges. 727 proven. 233 refuted. 0 times theorem prover too weak. 6162 trivial. 0 not checked. [2020-07-21 19:48:00,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:48:02,664 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:02,665 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:03,370 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:03,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:03,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:03,710 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:03,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:03,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:04,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7122 backedges. 727 proven. 243 refuted. 0 times theorem prover too weak. 6152 trivial. 0 not checked. [2020-07-21 19:48:05,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077715671] [2020-07-21 19:48:05,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:48:05,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 19:48:05,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054783687] [2020-07-21 19:48:05,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:48:05,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:48:05,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:48:05,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:48:05,797 INFO L87 Difference]: Start difference. First operand 284 states and 555 transitions. Second operand 17 states. [2020-07-21 19:48:06,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:48:06,279 INFO L93 Difference]: Finished difference Result 323 states and 597 transitions. [2020-07-21 19:48:06,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:48:06,280 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 499 [2020-07-21 19:48:06,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:48:06,284 INFO L225 Difference]: With dead ends: 323 [2020-07-21 19:48:06,284 INFO L226 Difference]: Without dead ends: 308 [2020-07-21 19:48:06,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 971 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:48:06,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-07-21 19:48:06,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 281. [2020-07-21 19:48:06,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 281 states. [2020-07-21 19:48:06,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 548 transitions. [2020-07-21 19:48:06,310 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 548 transitions. Word has length 499 [2020-07-21 19:48:06,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:48:06,311 INFO L479 AbstractCegarLoop]: Abstraction has 281 states and 548 transitions. [2020-07-21 19:48:06,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:48:06,311 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 548 transitions. [2020-07-21 19:48:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 19:48:06,315 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:48:06,315 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:48:06,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:48:06,516 INFO L427 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:48:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:48:06,517 INFO L82 PathProgramCache]: Analyzing trace with hash 516830041, now seen corresponding path program 63 times [2020-07-21 19:48:06,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:48:06,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134527736] [2020-07-21 19:48:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:48:07,598 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:48:07,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:48:07,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 19:48:07,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:48:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 785 proven. 125 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2020-07-21 19:48:07,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:48:09,630 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:10,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:10,014 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:10,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:10,236 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:10,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:10,377 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:10,529 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:10,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:11,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 783 proven. 137 refuted. 0 times theorem prover too weak. 5506 trivial. 0 not checked. [2020-07-21 19:48:12,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134527736] [2020-07-21 19:48:12,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:48:12,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 19:48:12,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299961819] [2020-07-21 19:48:12,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:48:12,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:48:12,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:48:12,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:48:12,704 INFO L87 Difference]: Start difference. First operand 281 states and 548 transitions. Second operand 17 states. [2020-07-21 19:48:13,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:48:13,178 INFO L93 Difference]: Finished difference Result 291 states and 558 transitions. [2020-07-21 19:48:13,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:48:13,178 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-21 19:48:13,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:48:13,181 INFO L225 Difference]: With dead ends: 291 [2020-07-21 19:48:13,181 INFO L226 Difference]: Without dead ends: 278 [2020-07-21 19:48:13,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:48:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-07-21 19:48:13,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 275. [2020-07-21 19:48:13,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-07-21 19:48:13,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 539 transitions. [2020-07-21 19:48:13,208 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 539 transitions. Word has length 475 [2020-07-21 19:48:13,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:48:13,208 INFO L479 AbstractCegarLoop]: Abstraction has 275 states and 539 transitions. [2020-07-21 19:48:13,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:48:13,208 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 539 transitions. [2020-07-21 19:48:13,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 19:48:13,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:48:13,213 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:48:13,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:48:13,414 INFO L427 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:48:13,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:48:13,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1930362302, now seen corresponding path program 64 times [2020-07-21 19:48:13,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:48:13,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962890717] [2020-07-21 19:48:13,416 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:48:14,463 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:48:14,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:48:14,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 19:48:14,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:48:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 828 proven. 283 refuted. 0 times theorem prover too weak. 5655 trivial. 0 not checked. [2020-07-21 19:48:14,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:48:17,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:17,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:17,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:18,343 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:18,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:18,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:18,785 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:18,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:19,405 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 828 proven. 297 refuted. 0 times theorem prover too weak. 5641 trivial. 0 not checked. [2020-07-21 19:48:20,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962890717] [2020-07-21 19:48:20,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:48:20,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 19:48:20,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555877433] [2020-07-21 19:48:20,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:48:20,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:48:20,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:48:20,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:48:20,904 INFO L87 Difference]: Start difference. First operand 275 states and 539 transitions. Second operand 19 states. [2020-07-21 19:48:21,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:48:21,479 INFO L93 Difference]: Finished difference Result 362 states and 686 transitions. [2020-07-21 19:48:21,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:48:21,480 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-21 19:48:21,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:48:21,485 INFO L225 Difference]: With dead ends: 362 [2020-07-21 19:48:21,485 INFO L226 Difference]: Without dead ends: 347 [2020-07-21 19:48:21,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:48:21,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-07-21 19:48:21,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 283. [2020-07-21 19:48:21,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-07-21 19:48:21,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 553 transitions. [2020-07-21 19:48:21,522 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 553 transitions. Word has length 487 [2020-07-21 19:48:21,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:48:21,522 INFO L479 AbstractCegarLoop]: Abstraction has 283 states and 553 transitions. [2020-07-21 19:48:21,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:48:21,522 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 553 transitions. [2020-07-21 19:48:21,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 19:48:21,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:48:21,527 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:48:21,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:48:21,728 INFO L427 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:48:21,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:48:21,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1570124953, now seen corresponding path program 65 times [2020-07-21 19:48:21,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:48:21,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058140288] [2020-07-21 19:48:21,730 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:48:22,791 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:48:22,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:48:22,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 19:48:22,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:48:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 772 proven. 138 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2020-07-21 19:48:23,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:48:24,906 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:25,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:25,289 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:25,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:25,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:25,717 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:25,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:26,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:26,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 770 proven. 150 refuted. 0 times theorem prover too weak. 5506 trivial. 0 not checked. [2020-07-21 19:48:28,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058140288] [2020-07-21 19:48:28,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:48:28,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-21 19:48:28,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463882789] [2020-07-21 19:48:28,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-21 19:48:28,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:48:28,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-21 19:48:28,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-21 19:48:28,177 INFO L87 Difference]: Start difference. First operand 283 states and 553 transitions. Second operand 17 states. [2020-07-21 19:48:28,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:48:28,702 INFO L93 Difference]: Finished difference Result 359 states and 706 transitions. [2020-07-21 19:48:28,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-21 19:48:28,705 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-21 19:48:28,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:48:28,711 INFO L225 Difference]: With dead ends: 359 [2020-07-21 19:48:28,712 INFO L226 Difference]: Without dead ends: 346 [2020-07-21 19:48:28,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-21 19:48:28,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-07-21 19:48:28,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 280. [2020-07-21 19:48:28,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-07-21 19:48:28,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 550 transitions. [2020-07-21 19:48:28,740 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 550 transitions. Word has length 475 [2020-07-21 19:48:28,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:48:28,740 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 550 transitions. [2020-07-21 19:48:28,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-21 19:48:28,740 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 550 transitions. [2020-07-21 19:48:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-07-21 19:48:28,748 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:48:28,748 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 29, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:48:28,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:48:28,950 INFO L427 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:48:28,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:48:28,951 INFO L82 PathProgramCache]: Analyzing trace with hash -374601762, now seen corresponding path program 66 times [2020-07-21 19:48:28,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:48:28,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888859068] [2020-07-21 19:48:28,952 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:48:30,082 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:48:30,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:48:30,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:48:30,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:48:30,325 INFO L134 CoverageAnalysis]: Checked inductivity of 6137 backedges. 532 proven. 625 refuted. 0 times theorem prover too weak. 4980 trivial. 0 not checked. [2020-07-21 19:48:30,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:48:34,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:35,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:35,046 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:35,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:35,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:35,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:35,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:36,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:36,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:36,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:36,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:36,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:36,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6137 backedges. 534 proven. 649 refuted. 0 times theorem prover too weak. 4954 trivial. 0 not checked. [2020-07-21 19:48:37,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888859068] [2020-07-21 19:48:37,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:48:37,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:48:37,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603800572] [2020-07-21 19:48:37,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:48:37,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:48:37,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:48:37,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:48:37,484 INFO L87 Difference]: Start difference. First operand 280 states and 550 transitions. Second operand 19 states. [2020-07-21 19:48:38,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:48:38,181 INFO L93 Difference]: Finished difference Result 376 states and 716 transitions. [2020-07-21 19:48:38,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:48:38,185 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 465 [2020-07-21 19:48:38,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:48:38,192 INFO L225 Difference]: With dead ends: 376 [2020-07-21 19:48:38,192 INFO L226 Difference]: Without dead ends: 361 [2020-07-21 19:48:38,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 936 GetRequests, 897 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:48:38,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2020-07-21 19:48:38,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 280. [2020-07-21 19:48:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-07-21 19:48:38,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 550 transitions. [2020-07-21 19:48:38,221 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 550 transitions. Word has length 465 [2020-07-21 19:48:38,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:48:38,221 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 550 transitions. [2020-07-21 19:48:38,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:48:38,221 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 550 transitions. [2020-07-21 19:48:38,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 19:48:38,226 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:48:38,226 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:48:38,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:48:38,427 INFO L427 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:48:38,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:48:38,428 INFO L82 PathProgramCache]: Analyzing trace with hash 878879307, now seen corresponding path program 67 times [2020-07-21 19:48:38,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:48:38,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1742446293] [2020-07-21 19:48:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:48:39,497 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:48:39,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:48:39,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 19:48:39,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:48:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 578 proven. 662 refuted. 0 times theorem prover too weak. 5186 trivial. 0 not checked. [2020-07-21 19:48:39,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:48:44,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:44,525 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:45,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:45,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:46,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:46,219 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:46,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:46,619 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:46,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:47,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:47,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:47,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 575 proven. 686 refuted. 0 times theorem prover too weak. 5165 trivial. 0 not checked. [2020-07-21 19:48:48,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1742446293] [2020-07-21 19:48:48,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:48:48,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 19:48:48,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475154787] [2020-07-21 19:48:48,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:48:48,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:48:48,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:48:48,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:48:48,507 INFO L87 Difference]: Start difference. First operand 280 states and 550 transitions. Second operand 21 states. [2020-07-21 19:48:49,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:48:49,420 INFO L93 Difference]: Finished difference Result 382 states and 721 transitions. [2020-07-21 19:48:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:48:49,423 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 475 [2020-07-21 19:48:49,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:48:49,430 INFO L225 Difference]: With dead ends: 382 [2020-07-21 19:48:49,431 INFO L226 Difference]: Without dead ends: 367 [2020-07-21 19:48:49,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 915 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 19:48:49,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-07-21 19:48:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 273. [2020-07-21 19:48:49,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-07-21 19:48:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 530 transitions. [2020-07-21 19:48:49,458 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 530 transitions. Word has length 475 [2020-07-21 19:48:49,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:48:49,458 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 530 transitions. [2020-07-21 19:48:49,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:48:49,458 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 530 transitions. [2020-07-21 19:48:49,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-21 19:48:49,463 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:48:49,463 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 28, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 11, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:48:49,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:48:49,664 INFO L427 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:48:49,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:48:49,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2105555492, now seen corresponding path program 68 times [2020-07-21 19:48:49,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:48:49,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271676011] [2020-07-21 19:48:49,666 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:48:50,766 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:48:50,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:48:50,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-21 19:48:50,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:48:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6793 backedges. 876 proven. 351 refuted. 0 times theorem prover too weak. 5566 trivial. 0 not checked. [2020-07-21 19:48:51,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:48:54,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:54,500 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:55,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:55,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:56,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:56,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:56,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:57,164 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:57,165 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:57,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:57,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:57,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:48:57,972 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 6793 backedges. 880 proven. 371 refuted. 0 times theorem prover too weak. 5542 trivial. 0 not checked. [2020-07-21 19:49:00,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271676011] [2020-07-21 19:49:00,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:49:00,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-21 19:49:00,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664806227] [2020-07-21 19:49:00,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:49:00,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:49:00,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:49:00,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:49:00,235 INFO L87 Difference]: Start difference. First operand 273 states and 530 transitions. Second operand 19 states. [2020-07-21 19:49:01,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:49:01,192 INFO L93 Difference]: Finished difference Result 371 states and 718 transitions. [2020-07-21 19:49:01,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:49:01,193 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 488 [2020-07-21 19:49:01,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:49:01,200 INFO L225 Difference]: With dead ends: 371 [2020-07-21 19:49:01,200 INFO L226 Difference]: Without dead ends: 356 [2020-07-21 19:49:01,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 943 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-21 19:49:01,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-07-21 19:49:01,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 245. [2020-07-21 19:49:01,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-07-21 19:49:01,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 457 transitions. [2020-07-21 19:49:01,229 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 457 transitions. Word has length 488 [2020-07-21 19:49:01,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:49:01,229 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 457 transitions. [2020-07-21 19:49:01,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:49:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 457 transitions. [2020-07-21 19:49:01,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 19:49:01,234 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:49:01,234 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:49:01,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:01,435 INFO L427 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:49:01,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:49:01,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1193665794, now seen corresponding path program 69 times [2020-07-21 19:49:01,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:49:01,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [209223530] [2020-07-21 19:49:01,438 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:02,697 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:49:02,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:49:02,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 19:49:02,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:49:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 507 proven. 604 refuted. 0 times theorem prover too weak. 5655 trivial. 0 not checked. [2020-07-21 19:49:03,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:49:07,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:07,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:08,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:08,820 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:09,524 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:09,941 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:09,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:10,146 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:10,363 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:10,760 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:11,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 509 proven. 616 refuted. 0 times theorem prover too weak. 5641 trivial. 0 not checked. [2020-07-21 19:49:11,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [209223530] [2020-07-21 19:49:11,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:49:11,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 19:49:11,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453180868] [2020-07-21 19:49:11,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:49:11,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:49:11,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:49:11,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:49:11,938 INFO L87 Difference]: Start difference. First operand 245 states and 457 transitions. Second operand 19 states. [2020-07-21 19:49:12,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:49:12,767 INFO L93 Difference]: Finished difference Result 340 states and 629 transitions. [2020-07-21 19:49:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:49:12,772 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-21 19:49:12,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:49:12,779 INFO L225 Difference]: With dead ends: 340 [2020-07-21 19:49:12,779 INFO L226 Difference]: Without dead ends: 320 [2020-07-21 19:49:12,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:49:12,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-07-21 19:49:12,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 224. [2020-07-21 19:49:12,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-07-21 19:49:12,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 413 transitions. [2020-07-21 19:49:12,808 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 413 transitions. Word has length 487 [2020-07-21 19:49:12,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:49:12,809 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 413 transitions. [2020-07-21 19:49:12,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:49:12,809 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 413 transitions. [2020-07-21 19:49:12,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 19:49:12,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:49:12,813 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:49:13,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:13,015 INFO L427 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:49:13,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:49:13,015 INFO L82 PathProgramCache]: Analyzing trace with hash 997451538, now seen corresponding path program 70 times [2020-07-21 19:49:13,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:49:13,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186338350] [2020-07-21 19:49:13,016 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:14,167 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:49:14,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:49:14,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 19:49:14,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:49:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 521 proven. 588 refuted. 0 times theorem prover too weak. 5649 trivial. 0 not checked. [2020-07-21 19:49:14,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:49:16,882 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-07-21 19:49:20,007 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:20,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:21,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:22,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:22,099 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:22,330 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:22,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:22,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:23,077 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:24,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 519 proven. 606 refuted. 0 times theorem prover too weak. 5633 trivial. 0 not checked. [2020-07-21 19:49:24,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186338350] [2020-07-21 19:49:24,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:49:24,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 19:49:24,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767218573] [2020-07-21 19:49:24,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:49:24,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:49:24,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:49:24,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:49:24,433 INFO L87 Difference]: Start difference. First operand 224 states and 413 transitions. Second operand 19 states. [2020-07-21 19:49:25,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:49:25,491 INFO L93 Difference]: Finished difference Result 269 states and 511 transitions. [2020-07-21 19:49:25,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:49:25,497 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-21 19:49:25,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:49:25,503 INFO L225 Difference]: With dead ends: 269 [2020-07-21 19:49:25,503 INFO L226 Difference]: Without dead ends: 254 [2020-07-21 19:49:25,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:49:25,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-07-21 19:49:25,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 216. [2020-07-21 19:49:25,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-21 19:49:25,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 399 transitions. [2020-07-21 19:49:25,528 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 399 transitions. Word has length 487 [2020-07-21 19:49:25,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:49:25,528 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 399 transitions. [2020-07-21 19:49:25,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:49:25,528 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 399 transitions. [2020-07-21 19:49:25,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 19:49:25,532 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:49:25,533 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:49:25,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:25,734 INFO L427 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:49:25,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:49:25,735 INFO L82 PathProgramCache]: Analyzing trace with hash -323780864, now seen corresponding path program 71 times [2020-07-21 19:49:25,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:49:25,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039055022] [2020-07-21 19:49:25,736 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:26,907 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:49:26,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:49:26,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 19:49:26,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:49:27,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 904 proven. 372 refuted. 0 times theorem prover too weak. 5482 trivial. 0 not checked. [2020-07-21 19:49:27,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:49:32,523 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-07-21 19:49:32,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:32,573 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:34,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:34,394 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:35,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:35,555 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:36,205 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:36,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:36,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:36,688 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:37,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 901 proven. 396 refuted. 0 times theorem prover too weak. 5461 trivial. 0 not checked. [2020-07-21 19:49:39,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039055022] [2020-07-21 19:49:39,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:49:39,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 19:49:39,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499714378] [2020-07-21 19:49:39,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:49:39,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:49:39,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:49:39,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:49:39,789 INFO L87 Difference]: Start difference. First operand 216 states and 399 transitions. Second operand 21 states. [2020-07-21 19:49:41,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:49:41,054 INFO L93 Difference]: Finished difference Result 353 states and 658 transitions. [2020-07-21 19:49:41,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:49:41,054 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 487 [2020-07-21 19:49:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:49:41,062 INFO L225 Difference]: With dead ends: 353 [2020-07-21 19:49:41,062 INFO L226 Difference]: Without dead ends: 330 [2020-07-21 19:49:41,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 939 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 19:49:41,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-07-21 19:49:41,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 206. [2020-07-21 19:49:41,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-07-21 19:49:41,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 377 transitions. [2020-07-21 19:49:41,089 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 377 transitions. Word has length 487 [2020-07-21 19:49:41,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:49:41,090 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 377 transitions. [2020-07-21 19:49:41,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:49:41,090 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 377 transitions. [2020-07-21 19:49:41,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-21 19:49:41,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:49:41,094 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:49:41,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:41,295 INFO L427 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:49:41,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:49:41,296 INFO L82 PathProgramCache]: Analyzing trace with hash -351726736, now seen corresponding path program 72 times [2020-07-21 19:49:41,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:49:41,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144517025] [2020-07-21 19:49:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:42,490 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:49:42,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:49:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 19:49:42,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:49:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 792 proven. 317 refuted. 0 times theorem prover too weak. 5657 trivial. 0 not checked. [2020-07-21 19:49:42,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:49:46,843 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:46,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:48,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:48,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,020 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,021 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,731 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:49,965 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:50,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:49:53,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 792 proven. 333 refuted. 0 times theorem prover too weak. 5641 trivial. 0 not checked. [2020-07-21 19:49:53,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144517025] [2020-07-21 19:49:53,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:49:53,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 19:49:53,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367449046] [2020-07-21 19:49:53,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:49:53,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:49:53,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:49:53,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:49:53,209 INFO L87 Difference]: Start difference. First operand 206 states and 377 transitions. Second operand 19 states. [2020-07-21 19:49:54,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:49:54,164 INFO L93 Difference]: Finished difference Result 257 states and 470 transitions. [2020-07-21 19:49:54,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:49:54,165 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-21 19:49:54,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:49:54,169 INFO L225 Difference]: With dead ends: 257 [2020-07-21 19:49:54,170 INFO L226 Difference]: Without dead ends: 234 [2020-07-21 19:49:54,171 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:49:54,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-07-21 19:49:54,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 178. [2020-07-21 19:49:54,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-07-21 19:49:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 321 transitions. [2020-07-21 19:49:54,188 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 321 transitions. Word has length 487 [2020-07-21 19:49:54,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:49:54,189 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 321 transitions. [2020-07-21 19:49:54,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:49:54,189 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 321 transitions. [2020-07-21 19:49:54,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 19:49:54,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:49:54,193 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:49:54,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:54,408 INFO L427 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:49:54,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:49:54,409 INFO L82 PathProgramCache]: Analyzing trace with hash -582108663, now seen corresponding path program 73 times [2020-07-21 19:49:54,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:49:54,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080629938] [2020-07-21 19:49:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:49:55,593 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:49:55,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:49:55,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 19:49:55,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:49:55,962 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 930 proven. 151 refuted. 0 times theorem prover too weak. 5333 trivial. 0 not checked. [2020-07-21 19:49:55,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:49:59,971 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 34 [2020-07-21 19:50:00,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:00,921 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:00,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:01,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:02,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:02,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:02,413 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:02,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:04,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:07,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 928 proven. 167 refuted. 0 times theorem prover too weak. 5319 trivial. 0 not checked. [2020-07-21 19:50:07,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080629938] [2020-07-21 19:50:07,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:50:07,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-21 19:50:07,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535388429] [2020-07-21 19:50:07,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-21 19:50:07,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:50:07,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-21 19:50:07,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-21 19:50:07,254 INFO L87 Difference]: Start difference. First operand 178 states and 321 transitions. Second operand 19 states. [2020-07-21 19:50:08,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:50:08,422 INFO L93 Difference]: Finished difference Result 222 states and 399 transitions. [2020-07-21 19:50:08,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-21 19:50:08,422 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 475 [2020-07-21 19:50:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:50:08,426 INFO L225 Difference]: With dead ends: 222 [2020-07-21 19:50:08,427 INFO L226 Difference]: Without dead ends: 202 [2020-07-21 19:50:08,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 919 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-21 19:50:08,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-21 19:50:08,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 137. [2020-07-21 19:50:08,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-21 19:50:08,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 240 transitions. [2020-07-21 19:50:08,444 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 240 transitions. Word has length 475 [2020-07-21 19:50:08,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:50:08,444 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 240 transitions. [2020-07-21 19:50:08,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-21 19:50:08,445 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 240 transitions. [2020-07-21 19:50:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-21 19:50:08,448 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:50:08,448 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 28, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:50:08,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:50:08,649 INFO L427 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:50:08,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:50:08,650 INFO L82 PathProgramCache]: Analyzing trace with hash -477489234, now seen corresponding path program 74 times [2020-07-21 19:50:08,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:50:08,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108486425] [2020-07-21 19:50:08,651 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:50:09,863 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:50:09,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:50:09,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-21 19:50:09,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:50:10,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 228 proven. 1083 refuted. 0 times theorem prover too weak. 4798 trivial. 0 not checked. [2020-07-21 19:50:10,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:50:18,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:18,227 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:21,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:21,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:22,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:23,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:23,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:24,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:24,005 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:24,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:24,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:24,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:24,553 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:24,671 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:24,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 234 proven. 1110 refuted. 0 times theorem prover too weak. 4765 trivial. 0 not checked. [2020-07-21 19:50:24,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108486425] [2020-07-21 19:50:24,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:50:24,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-21 19:50:24,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201003053] [2020-07-21 19:50:24,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:50:24,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:50:24,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:50:24,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:50:24,804 INFO L87 Difference]: Start difference. First operand 137 states and 240 transitions. Second operand 21 states. [2020-07-21 19:50:26,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:50:26,345 INFO L93 Difference]: Finished difference Result 236 states and 444 transitions. [2020-07-21 19:50:26,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:50:26,351 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 464 [2020-07-21 19:50:26,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:50:26,355 INFO L225 Difference]: With dead ends: 236 [2020-07-21 19:50:26,356 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 19:50:26,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 891 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-21 19:50:26,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 19:50:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-07-21 19:50:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-21 19:50:26,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 189 transitions. [2020-07-21 19:50:26,371 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 189 transitions. Word has length 464 [2020-07-21 19:50:26,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:50:26,371 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 189 transitions. [2020-07-21 19:50:26,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:50:26,372 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 189 transitions. [2020-07-21 19:50:26,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 19:50:26,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:50:26,374 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:50:26,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:50:26,575 INFO L427 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:50:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:50:26,576 INFO L82 PathProgramCache]: Analyzing trace with hash 759223819, now seen corresponding path program 75 times [2020-07-21 19:50:26,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:50:26,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603043564] [2020-07-21 19:50:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:50:27,811 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:50:27,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:50:27,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-21 19:50:27,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:50:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 258 proven. 982 refuted. 0 times theorem prover too weak. 5186 trivial. 0 not checked. [2020-07-21 19:50:28,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:50:30,989 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 19:50:31,094 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 19:50:36,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:36,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:38,704 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:40,222 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:40,223 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:41,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:41,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:41,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:42,052 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:42,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:42,381 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:42,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 259 proven. 1002 refuted. 0 times theorem prover too weak. 5165 trivial. 0 not checked. [2020-07-21 19:50:42,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603043564] [2020-07-21 19:50:42,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:50:42,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-21 19:50:42,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382913726] [2020-07-21 19:50:42,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-21 19:50:42,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:50:42,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-21 19:50:42,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-21 19:50:42,559 INFO L87 Difference]: Start difference. First operand 134 states and 189 transitions. Second operand 21 states. [2020-07-21 19:50:44,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:50:44,150 INFO L93 Difference]: Finished difference Result 220 states and 301 transitions. [2020-07-21 19:50:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-21 19:50:44,158 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 475 [2020-07-21 19:50:44,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:50:44,162 INFO L225 Difference]: With dead ends: 220 [2020-07-21 19:50:44,162 INFO L226 Difference]: Without dead ends: 134 [2020-07-21 19:50:44,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 915 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-21 19:50:44,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-21 19:50:44,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2020-07-21 19:50:44,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-21 19:50:44,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2020-07-21 19:50:44,176 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 475 [2020-07-21 19:50:44,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:50:44,176 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2020-07-21 19:50:44,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-21 19:50:44,177 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2020-07-21 19:50:44,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-21 19:50:44,179 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 19:50:44,180 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 19:50:44,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:50:44,381 INFO L427 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 19:50:44,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 19:50:44,382 INFO L82 PathProgramCache]: Analyzing trace with hash -247769445, now seen corresponding path program 76 times [2020-07-21 19:50:44,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 19:50:44,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230537058] [2020-07-21 19:50:44,382 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:50:45,701 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 19:50:45,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 19:50:45,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-21 19:50:45,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 19:50:46,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 258 proven. 1140 refuted. 0 times theorem prover too weak. 5016 trivial. 0 not checked. [2020-07-21 19:50:46,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 19:50:48,184 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 19:50:48,694 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 19:50:48,802 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 19:50:48,923 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 19:50:49,042 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 19:50:49,705 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 19:50:49,834 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-21 19:50:49,975 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 19:50:50,122 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-21 19:50:50,266 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-21 19:50:50,397 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-21 19:50:50,608 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-07-21 19:50:54,758 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2020-07-21 19:50:55,174 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 19:50:55,285 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 19:50:55,405 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 19:50:55,872 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 19:50:56,001 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-07-21 19:50:56,130 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 19:50:56,273 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-21 19:50:56,398 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-21 19:50:56,510 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2020-07-21 19:50:56,620 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:50:56,789 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-07-21 19:50:56,871 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:56,872 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:50:59,965 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 19:51:00,071 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-07-21 19:51:00,189 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 19:51:00,305 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2020-07-21 19:51:00,425 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-21 19:51:00,532 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-21 19:51:00,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:51:00,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:51:03,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:51:03,198 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:51:04,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:51:04,601 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:51:05,577 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:51:05,578 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:51:06,181 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:51:06,182 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:51:06,567 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:51:06,568 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 19:51:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 255 proven. 1173 refuted. 0 times theorem prover too weak. 4986 trivial. 0 not checked. [2020-07-21 19:51:07,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230537058] [2020-07-21 19:51:07,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 19:51:07,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 23 [2020-07-21 19:51:07,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835954719] [2020-07-21 19:51:07,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-21 19:51:07,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 19:51:07,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-21 19:51:07,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-07-21 19:51:07,199 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand 23 states. [2020-07-21 19:51:09,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 19:51:09,107 INFO L93 Difference]: Finished difference Result 203 states and 251 transitions. [2020-07-21 19:51:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-21 19:51:09,115 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 475 [2020-07-21 19:51:09,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 19:51:09,117 INFO L225 Difference]: With dead ends: 203 [2020-07-21 19:51:09,118 INFO L226 Difference]: Without dead ends: 0 [2020-07-21 19:51:09,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 911 SyntacticMatches, 17 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2020-07-21 19:51:09,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-21 19:51:09,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-21 19:51:09,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-21 19:51:09,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-21 19:51:09,124 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 475 [2020-07-21 19:51:09,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 19:51:09,124 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-21 19:51:09,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-21 19:51:09,124 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-21 19:51:09,125 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-21 19:51:09,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 19:51:09,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-21 19:51:14,718 WARN L193 SmtUtils]: Spent 3.72 s on a formula simplification. DAG size of input: 405 DAG size of output: 139 [2020-07-21 19:51:21,468 WARN L193 SmtUtils]: Spent 6.74 s on a formula simplification. DAG size of input: 660 DAG size of output: 224 [2020-07-21 19:51:25,494 WARN L193 SmtUtils]: Spent 4.02 s on a formula simplification. DAG size of input: 549 DAG size of output: 201 [2020-07-21 19:51:29,175 WARN L193 SmtUtils]: Spent 3.68 s on a formula simplification. DAG size of input: 549 DAG size of output: 201 [2020-07-21 19:51:30,816 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification. DAG size of input: 374 DAG size of output: 149 [2020-07-21 19:51:36,800 WARN L193 SmtUtils]: Spent 5.98 s on a formula simplification. DAG size of input: 669 DAG size of output: 212 [2020-07-21 19:51:49,001 WARN L193 SmtUtils]: Spent 12.20 s on a formula simplification. DAG size of input: 818 DAG size of output: 290 [2020-07-21 19:52:01,011 WARN L193 SmtUtils]: Spent 12.00 s on a formula simplification. DAG size of input: 809 DAG size of output: 292 [2020-07-21 19:52:04,949 WARN L193 SmtUtils]: Spent 3.90 s on a formula simplification. DAG size of input: 549 DAG size of output: 201 [2020-07-21 19:52:17,692 WARN L193 SmtUtils]: Spent 12.74 s on a formula simplification. DAG size of input: 838 DAG size of output: 277 [2020-07-21 19:52:17,921 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 73 [2020-07-21 19:52:30,391 WARN L193 SmtUtils]: Spent 12.47 s on a formula simplification. DAG size of input: 822 DAG size of output: 283 [2020-07-21 19:52:43,188 WARN L193 SmtUtils]: Spent 12.79 s on a formula simplification. DAG size of input: 822 DAG size of output: 282 [2020-07-21 19:52:52,831 WARN L193 SmtUtils]: Spent 9.64 s on a formula simplification. DAG size of input: 763 DAG size of output: 257 [2020-07-21 19:53:04,282 WARN L193 SmtUtils]: Spent 11.44 s on a formula simplification. DAG size of input: 807 DAG size of output: 279 [2020-07-21 19:53:16,917 WARN L193 SmtUtils]: Spent 12.63 s on a formula simplification. DAG size of input: 820 DAG size of output: 282 [2020-07-21 19:53:22,612 WARN L193 SmtUtils]: Spent 5.69 s on a formula simplification. DAG size of input: 629 DAG size of output: 229 [2020-07-21 19:53:24,188 WARN L193 SmtUtils]: Spent 1.57 s on a formula simplification. DAG size of input: 388 DAG size of output: 146 [2020-07-21 19:53:28,980 WARN L193 SmtUtils]: Spent 4.79 s on a formula simplification. DAG size of input: 606 DAG size of output: 188 [2020-07-21 19:53:36,883 WARN L193 SmtUtils]: Spent 7.90 s on a formula simplification. DAG size of input: 716 DAG size of output: 238 [2020-07-21 19:53:41,653 WARN L193 SmtUtils]: Spent 4.77 s on a formula simplification. DAG size of input: 597 DAG size of output: 214 [2020-07-21 19:53:53,917 WARN L193 SmtUtils]: Spent 12.22 s on a formula simplification. DAG size of input: 800 DAG size of output: 291