/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 23:08:55,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:08:55,280 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:08:55,318 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:08:55,319 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:08:55,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:08:55,332 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:08:55,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:08:55,339 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:08:55,342 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:08:55,343 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:08:55,344 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:08:55,345 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:08:55,347 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:08:55,350 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:08:55,352 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:08:55,353 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:08:55,355 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:08:55,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:08:55,367 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:08:55,369 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:08:55,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:08:55,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:08:55,372 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:08:55,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:08:55,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:08:55,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:08:55,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:08:55,408 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:08:55,419 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:08:55,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:08:55,421 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:08:55,421 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:08:55,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:08:55,422 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:08:55,422 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:08:55,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:08:55,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:08:55,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:08:55,423 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:08:55,423 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:08:55,423 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:08:55,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:08:55,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:08:55,424 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:08:55,424 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:08:55,424 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:08:55,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:08:55,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:08:55,425 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:08:55,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:08:55,425 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-09-04 23:08:55,902 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:08:55,925 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:08:55,931 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:08:55,933 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:08:55,934 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:08:55,935 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-04 23:08:56,024 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd45f7e79/d4e3ed0380e348398f9199e6f88eb6c2/FLAGc691c4861 [2020-09-04 23:08:56,583 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:08:56,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-04 23:08:56,592 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd45f7e79/d4e3ed0380e348398f9199e6f88eb6c2/FLAGc691c4861 [2020-09-04 23:08:56,911 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd45f7e79/d4e3ed0380e348398f9199e6f88eb6c2 [2020-09-04 23:08:56,926 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:08:56,928 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:08:56,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:08:56,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:08:56,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:08:56,935 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:08:56" (1/1) ... [2020-09-04 23:08:56,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ee08e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:08:56, skipping insertion in model container [2020-09-04 23:08:56,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:08:56" (1/1) ... [2020-09-04 23:08:56,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:08:56,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:08:57,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:08:57,213 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:08:57,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:08:57,253 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:08:57,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:08:57 WrapperNode [2020-09-04 23:08:57,254 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:08:57,255 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:08:57,255 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:08:57,255 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:08:57,345 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:08:57" (1/1) ... [2020-09-04 23:08:57,345 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:08:57" (1/1) ... [2020-09-04 23:08:57,355 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:08:57" (1/1) ... [2020-09-04 23:08:57,355 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:08:57" (1/1) ... [2020-09-04 23:08:57,364 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:08:57" (1/1) ... [2020-09-04 23:08:57,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:08:57" (1/1) ... [2020-09-04 23:08:57,374 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:08:57" (1/1) ... [2020-09-04 23:08:57,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:08:57,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:08:57,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:08:57,378 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:08:57,379 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:08:57" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 23:08:57,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:08:57,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:08:57,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:08:57,455 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-04 23:08:57,456 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:08:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 23:08:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:08:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:08:57,457 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-04 23:08:57,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 23:08:57,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 23:08:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:08:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 23:08:57,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 23:08:57,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 23:08:57,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:08:57,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:08:57,823 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:08:57,823 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 23:08:57,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:08:57 BoogieIcfgContainer [2020-09-04 23:08:57,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:08:57,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:08:57,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:08:57,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:08:57,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:08:56" (1/3) ... [2020-09-04 23:08:57,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505ea79c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:08:57, skipping insertion in model container [2020-09-04 23:08:57,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:08:57" (2/3) ... [2020-09-04 23:08:57,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@505ea79c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:08:57, skipping insertion in model container [2020-09-04 23:08:57,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:08:57" (3/3) ... [2020-09-04 23:08:57,838 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-09-04 23:08:57,849 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:08:57,858 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:08:57,878 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:08:57,902 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:08:57,902 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:08:57,902 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:08:57,902 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:08:57,902 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:08:57,902 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:08:57,903 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:08:57,903 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:08:57,920 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-04 23:08:57,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 23:08:57,932 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:08:57,933 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-09-04 23:08:57,933 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:08:57,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:08:57,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1392671971, now seen corresponding path program 1 times [2020-09-04 23:08:57,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:08:57,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932029535] [2020-09-04 23:08:57,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:08:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:58,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:08:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:58,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:08:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:08:58,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932029535] [2020-09-04 23:08:58,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:08:58,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 23:08:58,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867274240] [2020-09-04 23:08:58,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 23:08:58,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:08:58,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 23:08:58,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 23:08:58,247 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-09-04 23:08:58,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:08:58,500 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-04 23:08:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 23:08:58,503 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-04 23:08:58,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:08:58,520 INFO L225 Difference]: With dead ends: 94 [2020-09-04 23:08:58,520 INFO L226 Difference]: Without dead ends: 53 [2020-09-04 23:08:58,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:08:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-04 23:08:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-09-04 23:08:58,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-04 23:08:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-09-04 23:08:58,586 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-09-04 23:08:58,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:08:58,587 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-09-04 23:08:58,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 23:08:58,587 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-09-04 23:08:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 23:08:58,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:08:58,589 INFO L422 BasicCegarLoop]: trace histogram [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, 1] [2020-09-04 23:08:58,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:08:58,590 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:08:58,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:08:58,591 INFO L82 PathProgramCache]: Analyzing trace with hash 31734745, now seen corresponding path program 1 times [2020-09-04 23:08:58,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:08:58,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906461686] [2020-09-04 23:08:58,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:08:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:58,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:08:58,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:58,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:08:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:58,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:08:58,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906461686] [2020-09-04 23:08:58,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:08:58,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 23:08:58,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469171438] [2020-09-04 23:08:58,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 23:08:58,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:08:58,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 23:08:58,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:08:58,811 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 7 states. [2020-09-04 23:08:59,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:08:59,105 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2020-09-04 23:08:59,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 23:08:59,106 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-09-04 23:08:59,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:08:59,107 INFO L225 Difference]: With dead ends: 81 [2020-09-04 23:08:59,108 INFO L226 Difference]: Without dead ends: 54 [2020-09-04 23:08:59,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:08:59,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-04 23:08:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-09-04 23:08:59,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-04 23:08:59,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-04 23:08:59,123 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-04 23:08:59,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:08:59,124 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-04 23:08:59,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 23:08:59,124 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-04 23:08:59,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-04 23:08:59,126 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:08:59,126 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:08:59,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:08:59,127 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:08:59,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:08:59,127 INFO L82 PathProgramCache]: Analyzing trace with hash -579567659, now seen corresponding path program 1 times [2020-09-04 23:08:59,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:08:59,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110055496] [2020-09-04 23:08:59,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:08:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:59,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:08:59,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:59,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:08:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:59,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:08:59,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110055496] [2020-09-04 23:08:59,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:08:59,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 23:08:59,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162621493] [2020-09-04 23:08:59,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 23:08:59,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:08:59,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 23:08:59,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:08:59,468 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 9 states. [2020-09-04 23:08:59,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:08:59,791 INFO L93 Difference]: Finished difference Result 87 states and 95 transitions. [2020-09-04 23:08:59,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-04 23:08:59,791 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-09-04 23:08:59,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:08:59,793 INFO L225 Difference]: With dead ends: 87 [2020-09-04 23:08:59,793 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 23:08:59,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:08:59,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 23:08:59,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-09-04 23:08:59,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-04 23:08:59,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-09-04 23:08:59,807 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-09-04 23:08:59,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:08:59,807 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-09-04 23:08:59,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 23:08:59,808 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-09-04 23:08:59,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 23:08:59,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:08:59,809 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:08:59,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:08:59,810 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:08:59,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:08:59,810 INFO L82 PathProgramCache]: Analyzing trace with hash 556324561, now seen corresponding path program 2 times [2020-09-04 23:08:59,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:08:59,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200619796] [2020-09-04 23:08:59,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:08:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:59,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:08:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:59,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:08:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:08:59,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-04 23:08:59,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200619796] [2020-09-04 23:08:59,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:08:59,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 23:08:59,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556207025] [2020-09-04 23:08:59,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 23:08:59,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:08:59,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 23:08:59,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 23:08:59,930 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 5 states. [2020-09-04 23:09:00,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:00,096 INFO L93 Difference]: Finished difference Result 86 states and 95 transitions. [2020-09-04 23:09:00,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 23:09:00,097 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-09-04 23:09:00,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:00,099 INFO L225 Difference]: With dead ends: 86 [2020-09-04 23:09:00,100 INFO L226 Difference]: Without dead ends: 71 [2020-09-04 23:09:00,100 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:09:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-04 23:09:00,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2020-09-04 23:09:00,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 23:09:00,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-09-04 23:09:00,116 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 41 [2020-09-04 23:09:00,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:00,117 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-09-04 23:09:00,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 23:09:00,117 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-09-04 23:09:00,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-04 23:09:00,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:00,118 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:00,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:09:00,119 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:00,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:00,119 INFO L82 PathProgramCache]: Analyzing trace with hash 272366111, now seen corresponding path program 1 times [2020-09-04 23:09:00,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:00,120 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038396336] [2020-09-04 23:09:00,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:00,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:00,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:00,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:00,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-04 23:09:00,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038396336] [2020-09-04 23:09:00,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:00,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 23:09:00,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417143501] [2020-09-04 23:09:00,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 23:09:00,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:00,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 23:09:00,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:09:00,249 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2020-09-04 23:09:00,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:00,455 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2020-09-04 23:09:00,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 23:09:00,456 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 48 [2020-09-04 23:09:00,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:00,457 INFO L225 Difference]: With dead ends: 95 [2020-09-04 23:09:00,458 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 23:09:00,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:09:00,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 23:09:00,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-09-04 23:09:00,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-04 23:09:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-09-04 23:09:00,470 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 48 [2020-09-04 23:09:00,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:00,470 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-09-04 23:09:00,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 23:09:00,471 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-09-04 23:09:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-04 23:09:00,472 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:00,472 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:00,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 23:09:00,473 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:00,473 INFO L82 PathProgramCache]: Analyzing trace with hash 92742417, now seen corresponding path program 2 times [2020-09-04 23:09:00,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:00,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338241666] [2020-09-04 23:09:00,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:00,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:00,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:00,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:00,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338241666] [2020-09-04 23:09:00,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:00,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 23:09:00,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434635922] [2020-09-04 23:09:00,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 23:09:00,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:00,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 23:09:00,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-04 23:09:00,870 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 11 states. [2020-09-04 23:09:01,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:01,290 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2020-09-04 23:09:01,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-04 23:09:01,297 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 55 [2020-09-04 23:09:01,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:01,299 INFO L225 Difference]: With dead ends: 113 [2020-09-04 23:09:01,299 INFO L226 Difference]: Without dead ends: 76 [2020-09-04 23:09:01,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-09-04 23:09:01,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-04 23:09:01,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-09-04 23:09:01,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-04 23:09:01,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-09-04 23:09:01,310 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-09-04 23:09:01,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:01,310 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-09-04 23:09:01,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 23:09:01,311 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-09-04 23:09:01,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-04 23:09:01,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:01,312 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:01,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 23:09:01,313 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:01,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:01,313 INFO L82 PathProgramCache]: Analyzing trace with hash 809903117, now seen corresponding path program 3 times [2020-09-04 23:09:01,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:01,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112857633] [2020-09-04 23:09:01,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:01,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:01,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:01,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:01,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112857633] [2020-09-04 23:09:01,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:01,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-04 23:09:01,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496403656] [2020-09-04 23:09:01,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 23:09:01,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:01,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 23:09:01,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-04 23:09:01,749 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 13 states. [2020-09-04 23:09:02,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:02,204 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2020-09-04 23:09:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 23:09:02,204 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-09-04 23:09:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:02,206 INFO L225 Difference]: With dead ends: 119 [2020-09-04 23:09:02,206 INFO L226 Difference]: Without dead ends: 82 [2020-09-04 23:09:02,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-09-04 23:09:02,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-04 23:09:02,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-09-04 23:09:02,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-04 23:09:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-09-04 23:09:02,218 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 61 [2020-09-04 23:09:02,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:02,219 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-09-04 23:09:02,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 23:09:02,219 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-09-04 23:09:02,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-04 23:09:02,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:02,223 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:02,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 23:09:02,223 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:02,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:02,224 INFO L82 PathProgramCache]: Analyzing trace with hash 577206281, now seen corresponding path program 4 times [2020-09-04 23:09:02,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:02,224 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083744628] [2020-09-04 23:09:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:02,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:02,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:02,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083744628] [2020-09-04 23:09:02,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:02,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-04 23:09:02,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58422309] [2020-09-04 23:09:02,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 23:09:02,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:02,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 23:09:02,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:09:02,705 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 15 states. [2020-09-04 23:09:03,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:03,324 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2020-09-04 23:09:03,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 23:09:03,325 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-09-04 23:09:03,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:03,327 INFO L225 Difference]: With dead ends: 125 [2020-09-04 23:09:03,327 INFO L226 Difference]: Without dead ends: 88 [2020-09-04 23:09:03,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-09-04 23:09:03,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-04 23:09:03,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-09-04 23:09:03,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 23:09:03,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-09-04 23:09:03,347 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 67 [2020-09-04 23:09:03,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:03,347 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-09-04 23:09:03,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 23:09:03,348 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-09-04 23:09:03,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-09-04 23:09:03,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:03,349 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:03,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 23:09:03,349 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:03,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash -274669819, now seen corresponding path program 5 times [2020-09-04 23:09:03,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:03,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29064493] [2020-09-04 23:09:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:03,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:03,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:03,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:04,020 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:04,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29064493] [2020-09-04 23:09:04,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:04,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-04 23:09:04,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617881390] [2020-09-04 23:09:04,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 23:09:04,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:04,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 23:09:04,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-09-04 23:09:04,031 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 17 states. [2020-09-04 23:09:04,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:04,680 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2020-09-04 23:09:04,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 23:09:04,681 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-09-04 23:09:04,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:04,683 INFO L225 Difference]: With dead ends: 131 [2020-09-04 23:09:04,683 INFO L226 Difference]: Without dead ends: 94 [2020-09-04 23:09:04,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-09-04 23:09:04,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-04 23:09:04,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-09-04 23:09:04,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-04 23:09:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-09-04 23:09:04,710 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 73 [2020-09-04 23:09:04,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:04,710 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-09-04 23:09:04,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 23:09:04,710 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-09-04 23:09:04,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 23:09:04,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:04,714 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:04,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 23:09:04,714 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:04,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:04,715 INFO L82 PathProgramCache]: Analyzing trace with hash -61335295, now seen corresponding path program 6 times [2020-09-04 23:09:04,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:04,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605038493] [2020-09-04 23:09:04,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:04,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:04,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:04,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:04,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:05,492 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:05,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605038493] [2020-09-04 23:09:05,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:05,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-04 23:09:05,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821892958] [2020-09-04 23:09:05,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 23:09:05,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:05,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 23:09:05,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-09-04 23:09:05,496 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 19 states. [2020-09-04 23:09:06,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:06,405 INFO L93 Difference]: Finished difference Result 137 states and 147 transitions. [2020-09-04 23:09:06,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-04 23:09:06,405 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 79 [2020-09-04 23:09:06,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:06,406 INFO L225 Difference]: With dead ends: 137 [2020-09-04 23:09:06,407 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 23:09:06,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 23:09:06,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 23:09:06,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-09-04 23:09:06,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-04 23:09:06,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-09-04 23:09:06,421 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 79 [2020-09-04 23:09:06,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:06,422 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-09-04 23:09:06,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 23:09:06,422 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-09-04 23:09:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-04 23:09:06,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:06,431 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:06,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 23:09:06,431 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:06,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1180506627, now seen corresponding path program 7 times [2020-09-04 23:09:06,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:06,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015951877] [2020-09-04 23:09:06,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:06,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:06,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:06,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:07,318 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:07,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015951877] [2020-09-04 23:09:07,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:07,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-04 23:09:07,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184877493] [2020-09-04 23:09:07,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 23:09:07,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:07,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 23:09:07,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-09-04 23:09:07,320 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 21 states. [2020-09-04 23:09:08,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:08,281 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2020-09-04 23:09:08,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-04 23:09:08,282 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 85 [2020-09-04 23:09:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:08,283 INFO L225 Difference]: With dead ends: 143 [2020-09-04 23:09:08,283 INFO L226 Difference]: Without dead ends: 106 [2020-09-04 23:09:08,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 23:09:08,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-04 23:09:08,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-09-04 23:09:08,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-04 23:09:08,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-09-04 23:09:08,299 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 85 [2020-09-04 23:09:08,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:08,300 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-09-04 23:09:08,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 23:09:08,300 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-09-04 23:09:08,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-04 23:09:08,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:08,306 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:08,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 23:09:08,306 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1632044537, now seen corresponding path program 8 times [2020-09-04 23:09:08,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:08,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833804885] [2020-09-04 23:09:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:08,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:08,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:08,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:08,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:09,341 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:09,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833804885] [2020-09-04 23:09:09,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:09,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-04 23:09:09,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386268101] [2020-09-04 23:09:09,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 23:09:09,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:09,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 23:09:09,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-09-04 23:09:09,344 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 23 states. [2020-09-04 23:09:10,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:10,446 INFO L93 Difference]: Finished difference Result 149 states and 159 transitions. [2020-09-04 23:09:10,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-04 23:09:10,447 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 91 [2020-09-04 23:09:10,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:10,449 INFO L225 Difference]: With dead ends: 149 [2020-09-04 23:09:10,449 INFO L226 Difference]: Without dead ends: 112 [2020-09-04 23:09:10,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2020-09-04 23:09:10,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-04 23:09:10,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-09-04 23:09:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-04 23:09:10,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-09-04 23:09:10,465 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 91 [2020-09-04 23:09:10,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:10,466 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-09-04 23:09:10,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 23:09:10,466 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-09-04 23:09:10,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-04 23:09:10,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:10,468 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:10,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 23:09:10,468 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:10,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:10,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1313195787, now seen corresponding path program 9 times [2020-09-04 23:09:10,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:10,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733714711] [2020-09-04 23:09:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:10,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:10,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:10,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:11,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733714711] [2020-09-04 23:09:11,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:11,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-04 23:09:11,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168264009] [2020-09-04 23:09:11,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-04 23:09:11,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:11,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-04 23:09:11,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-09-04 23:09:11,583 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 25 states. [2020-09-04 23:09:12,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:12,918 INFO L93 Difference]: Finished difference Result 155 states and 165 transitions. [2020-09-04 23:09:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-04 23:09:12,919 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2020-09-04 23:09:12,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:12,921 INFO L225 Difference]: With dead ends: 155 [2020-09-04 23:09:12,921 INFO L226 Difference]: Without dead ends: 118 [2020-09-04 23:09:12,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=611, Invalid=1551, Unknown=0, NotChecked=0, Total=2162 [2020-09-04 23:09:12,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-04 23:09:12,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-09-04 23:09:12,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-04 23:09:12,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-09-04 23:09:12,933 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 97 [2020-09-04 23:09:12,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:12,934 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-09-04 23:09:12,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-04 23:09:12,934 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-09-04 23:09:12,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-04 23:09:12,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:12,935 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:12,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 23:09:12,936 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:12,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:12,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1440596239, now seen corresponding path program 10 times [2020-09-04 23:09:12,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:12,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173979154] [2020-09-04 23:09:12,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:12,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:13,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:13,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:13,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:13,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:14,197 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:14,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173979154] [2020-09-04 23:09:14,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:14,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-04 23:09:14,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743731509] [2020-09-04 23:09:14,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-04 23:09:14,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:14,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-04 23:09:14,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-09-04 23:09:14,199 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 27 states. [2020-09-04 23:09:15,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:15,556 INFO L93 Difference]: Finished difference Result 161 states and 171 transitions. [2020-09-04 23:09:15,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-04 23:09:15,557 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 103 [2020-09-04 23:09:15,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:15,558 INFO L225 Difference]: With dead ends: 161 [2020-09-04 23:09:15,558 INFO L226 Difference]: Without dead ends: 124 [2020-09-04 23:09:15,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=725, Invalid=1825, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 23:09:15,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-04 23:09:15,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-09-04 23:09:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-09-04 23:09:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-09-04 23:09:15,575 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 103 [2020-09-04 23:09:15,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:15,575 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-09-04 23:09:15,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-04 23:09:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-09-04 23:09:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-09-04 23:09:15,577 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:15,577 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:15,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 23:09:15,577 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:15,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:15,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1179965421, now seen corresponding path program 11 times [2020-09-04 23:09:15,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:15,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144164439] [2020-09-04 23:09:15,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:15,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:15,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:15,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:17,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144164439] [2020-09-04 23:09:17,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:17,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-04 23:09:17,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887959078] [2020-09-04 23:09:17,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-04 23:09:17,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:17,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-04 23:09:17,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-09-04 23:09:17,010 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 29 states. [2020-09-04 23:09:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:18,518 INFO L93 Difference]: Finished difference Result 167 states and 177 transitions. [2020-09-04 23:09:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-04 23:09:18,519 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 109 [2020-09-04 23:09:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:18,520 INFO L225 Difference]: With dead ends: 167 [2020-09-04 23:09:18,521 INFO L226 Difference]: Without dead ends: 130 [2020-09-04 23:09:18,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=849, Invalid=2121, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 23:09:18,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-04 23:09:18,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-09-04 23:09:18,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-09-04 23:09:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-09-04 23:09:18,535 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 109 [2020-09-04 23:09:18,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:18,535 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-09-04 23:09:18,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-04 23:09:18,535 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-09-04 23:09:18,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-04 23:09:18,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:18,537 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:18,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 23:09:18,537 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:18,537 INFO L82 PathProgramCache]: Analyzing trace with hash 987218921, now seen corresponding path program 12 times [2020-09-04 23:09:18,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:18,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876094124] [2020-09-04 23:09:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:18,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:18,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:18,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:18,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:20,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876094124] [2020-09-04 23:09:20,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:20,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-04 23:09:20,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189655808] [2020-09-04 23:09:20,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-04 23:09:20,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:20,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-04 23:09:20,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-09-04 23:09:20,165 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 31 states. [2020-09-04 23:09:21,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:21,911 INFO L93 Difference]: Finished difference Result 173 states and 183 transitions. [2020-09-04 23:09:21,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-04 23:09:21,912 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 115 [2020-09-04 23:09:21,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:21,913 INFO L225 Difference]: With dead ends: 173 [2020-09-04 23:09:21,913 INFO L226 Difference]: Without dead ends: 136 [2020-09-04 23:09:21,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=983, Invalid=2439, Unknown=0, NotChecked=0, Total=3422 [2020-09-04 23:09:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-04 23:09:21,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-09-04 23:09:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-04 23:09:21,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-09-04 23:09:21,929 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 115 [2020-09-04 23:09:21,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:21,930 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-09-04 23:09:21,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-04 23:09:21,930 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-09-04 23:09:21,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-04 23:09:21,931 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:21,931 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:21,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 23:09:21,932 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:21,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:21,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1327447323, now seen corresponding path program 13 times [2020-09-04 23:09:21,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:21,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115062946] [2020-09-04 23:09:21,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:22,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:22,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:23,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115062946] [2020-09-04 23:09:23,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:23,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-04 23:09:23,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887473349] [2020-09-04 23:09:23,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-04 23:09:23,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:23,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-04 23:09:23,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 23:09:23,725 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 33 states. [2020-09-04 23:09:25,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:25,677 INFO L93 Difference]: Finished difference Result 179 states and 189 transitions. [2020-09-04 23:09:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-04 23:09:25,678 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 121 [2020-09-04 23:09:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:25,680 INFO L225 Difference]: With dead ends: 179 [2020-09-04 23:09:25,680 INFO L226 Difference]: Without dead ends: 142 [2020-09-04 23:09:25,682 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1127, Invalid=2779, Unknown=0, NotChecked=0, Total=3906 [2020-09-04 23:09:25,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-04 23:09:25,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-09-04 23:09:25,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-09-04 23:09:25,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-09-04 23:09:25,695 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2020-09-04 23:09:25,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:25,695 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-09-04 23:09:25,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-04 23:09:25,696 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-09-04 23:09:25,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-09-04 23:09:25,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:25,697 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:25,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 23:09:25,697 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:25,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:25,698 INFO L82 PathProgramCache]: Analyzing trace with hash 39163105, now seen corresponding path program 14 times [2020-09-04 23:09:25,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:25,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937592979] [2020-09-04 23:09:25,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:25,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:25,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:25,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:27,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937592979] [2020-09-04 23:09:27,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:27,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-04 23:09:27,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761811958] [2020-09-04 23:09:27,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-04 23:09:27,433 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:27,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-04 23:09:27,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 23:09:27,434 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 35 states. [2020-09-04 23:09:29,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:29,504 INFO L93 Difference]: Finished difference Result 185 states and 195 transitions. [2020-09-04 23:09:29,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-04 23:09:29,505 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 127 [2020-09-04 23:09:29,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:29,507 INFO L225 Difference]: With dead ends: 185 [2020-09-04 23:09:29,507 INFO L226 Difference]: Without dead ends: 148 [2020-09-04 23:09:29,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1281, Invalid=3141, Unknown=0, NotChecked=0, Total=4422 [2020-09-04 23:09:29,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-04 23:09:29,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-09-04 23:09:29,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-09-04 23:09:29,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-09-04 23:09:29,524 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 127 [2020-09-04 23:09:29,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:29,525 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-09-04 23:09:29,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-04 23:09:29,525 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-09-04 23:09:29,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-09-04 23:09:29,526 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:29,526 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:29,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 23:09:29,527 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:29,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:29,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1976302045, now seen corresponding path program 15 times [2020-09-04 23:09:29,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:29,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036485333] [2020-09-04 23:09:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:29,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:29,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:29,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:29,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:31,534 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 645 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:31,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036485333] [2020-09-04 23:09:31,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:31,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-04 23:09:31,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415252634] [2020-09-04 23:09:31,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-04 23:09:31,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:31,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-04 23:09:31,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-09-04 23:09:31,537 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 37 states. [2020-09-04 23:09:33,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:33,711 INFO L93 Difference]: Finished difference Result 191 states and 201 transitions. [2020-09-04 23:09:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-04 23:09:33,711 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 133 [2020-09-04 23:09:33,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:33,713 INFO L225 Difference]: With dead ends: 191 [2020-09-04 23:09:33,713 INFO L226 Difference]: Without dead ends: 154 [2020-09-04 23:09:33,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1445, Invalid=3525, Unknown=0, NotChecked=0, Total=4970 [2020-09-04 23:09:33,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-04 23:09:33,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-09-04 23:09:33,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-04 23:09:33,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-09-04 23:09:33,732 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 133 [2020-09-04 23:09:33,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:33,732 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-09-04 23:09:33,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-04 23:09:33,733 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-09-04 23:09:33,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-09-04 23:09:33,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:33,734 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:33,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 23:09:33,735 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:33,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:33,735 INFO L82 PathProgramCache]: Analyzing trace with hash -91639335, now seen corresponding path program 16 times [2020-09-04 23:09:33,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:33,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421504594] [2020-09-04 23:09:33,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:33,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:33,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:33,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:36,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421504594] [2020-09-04 23:09:36,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:36,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-09-04 23:09:36,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224772153] [2020-09-04 23:09:36,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-04 23:09:36,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:36,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-04 23:09:36,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 23:09:36,032 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 39 states. [2020-09-04 23:09:38,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:38,443 INFO L93 Difference]: Finished difference Result 197 states and 207 transitions. [2020-09-04 23:09:38,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-04 23:09:38,444 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 139 [2020-09-04 23:09:38,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:38,445 INFO L225 Difference]: With dead ends: 197 [2020-09-04 23:09:38,445 INFO L226 Difference]: Without dead ends: 160 [2020-09-04 23:09:38,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1619, Invalid=3931, Unknown=0, NotChecked=0, Total=5550 [2020-09-04 23:09:38,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-04 23:09:38,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-09-04 23:09:38,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-09-04 23:09:38,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-09-04 23:09:38,464 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 139 [2020-09-04 23:09:38,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:38,465 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-09-04 23:09:38,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-04 23:09:38,465 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-09-04 23:09:38,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-09-04 23:09:38,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:38,467 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:38,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 23:09:38,467 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:38,468 INFO L82 PathProgramCache]: Analyzing trace with hash -461079339, now seen corresponding path program 17 times [2020-09-04 23:09:38,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:38,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163587213] [2020-09-04 23:09:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:38,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:38,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:38,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:38,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:38,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 833 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:40,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163587213] [2020-09-04 23:09:40,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:40,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-04 23:09:40,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556294950] [2020-09-04 23:09:40,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-04 23:09:40,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:40,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-04 23:09:40,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 23:09:40,991 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 41 states. [2020-09-04 23:09:43,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:43,749 INFO L93 Difference]: Finished difference Result 203 states and 213 transitions. [2020-09-04 23:09:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-04 23:09:43,750 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 145 [2020-09-04 23:09:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:43,752 INFO L225 Difference]: With dead ends: 203 [2020-09-04 23:09:43,752 INFO L226 Difference]: Without dead ends: 166 [2020-09-04 23:09:43,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1803, Invalid=4359, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 23:09:43,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-09-04 23:09:43,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-09-04 23:09:43,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-04 23:09:43,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2020-09-04 23:09:43,771 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 145 [2020-09-04 23:09:43,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:43,771 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2020-09-04 23:09:43,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-04 23:09:43,771 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2020-09-04 23:09:43,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-04 23:09:43,772 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:43,772 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:43,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 23:09:43,772 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:43,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:43,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1469965615, now seen corresponding path program 18 times [2020-09-04 23:09:43,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:43,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079311421] [2020-09-04 23:09:43,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:43,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:43,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:43,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 936 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:46,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079311421] [2020-09-04 23:09:46,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:46,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-09-04 23:09:46,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885310986] [2020-09-04 23:09:46,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-09-04 23:09:46,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:46,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-09-04 23:09:46,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2020-09-04 23:09:46,457 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand 43 states. [2020-09-04 23:09:49,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:49,544 INFO L93 Difference]: Finished difference Result 209 states and 219 transitions. [2020-09-04 23:09:49,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-04 23:09:49,547 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 151 [2020-09-04 23:09:49,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:49,548 INFO L225 Difference]: With dead ends: 209 [2020-09-04 23:09:49,549 INFO L226 Difference]: Without dead ends: 172 [2020-09-04 23:09:49,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1997, Invalid=4809, Unknown=0, NotChecked=0, Total=6806 [2020-09-04 23:09:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-09-04 23:09:49,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-09-04 23:09:49,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-04 23:09:49,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-09-04 23:09:49,567 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 151 [2020-09-04 23:09:49,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:49,568 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-09-04 23:09:49,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-09-04 23:09:49,568 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-09-04 23:09:49,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-09-04 23:09:49,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:49,569 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:49,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 23:09:49,570 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:49,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:49,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1753723955, now seen corresponding path program 19 times [2020-09-04 23:09:49,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:49,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628989477] [2020-09-04 23:09:49,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:49,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:49,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:49,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 1045 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:52,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628989477] [2020-09-04 23:09:52,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:52,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-09-04 23:09:52,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494872048] [2020-09-04 23:09:52,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-04 23:09:52,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:52,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-04 23:09:52,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2020-09-04 23:09:52,441 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 45 states. [2020-09-04 23:09:55,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:09:55,464 INFO L93 Difference]: Finished difference Result 215 states and 225 transitions. [2020-09-04 23:09:55,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-09-04 23:09:55,465 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 157 [2020-09-04 23:09:55,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:09:55,466 INFO L225 Difference]: With dead ends: 215 [2020-09-04 23:09:55,466 INFO L226 Difference]: Without dead ends: 178 [2020-09-04 23:09:55,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2201, Invalid=5281, Unknown=0, NotChecked=0, Total=7482 [2020-09-04 23:09:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-09-04 23:09:55,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-09-04 23:09:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-09-04 23:09:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2020-09-04 23:09:55,484 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 157 [2020-09-04 23:09:55,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:09:55,484 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2020-09-04 23:09:55,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-04 23:09:55,484 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2020-09-04 23:09:55,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-09-04 23:09:55,485 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:09:55,485 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:09:55,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-04 23:09:55,485 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:09:55,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:09:55,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1681076279, now seen corresponding path program 20 times [2020-09-04 23:09:55,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:09:55,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12173179] [2020-09-04 23:09:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:09:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:55,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:09:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:55,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:09:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:09:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 1160 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:09:58,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12173179] [2020-09-04 23:09:58,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:09:58,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-09-04 23:09:58,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107837115] [2020-09-04 23:09:58,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-09-04 23:09:58,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:09:58,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-09-04 23:09:58,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2020-09-04 23:09:58,659 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand 47 states. [2020-09-04 23:10:02,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:02,300 INFO L93 Difference]: Finished difference Result 221 states and 231 transitions. [2020-09-04 23:10:02,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-09-04 23:10:02,301 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 163 [2020-09-04 23:10:02,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:02,303 INFO L225 Difference]: With dead ends: 221 [2020-09-04 23:10:02,303 INFO L226 Difference]: Without dead ends: 184 [2020-09-04 23:10:02,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2415, Invalid=5775, Unknown=0, NotChecked=0, Total=8190 [2020-09-04 23:10:02,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-09-04 23:10:02,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-09-04 23:10:02,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-09-04 23:10:02,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2020-09-04 23:10:02,326 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 163 [2020-09-04 23:10:02,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:02,327 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2020-09-04 23:10:02,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-09-04 23:10:02,327 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2020-09-04 23:10:02,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-09-04 23:10:02,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:02,328 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:02,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-04 23:10:02,328 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:02,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:02,329 INFO L82 PathProgramCache]: Analyzing trace with hash -199924027, now seen corresponding path program 21 times [2020-09-04 23:10:02,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:02,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527929775] [2020-09-04 23:10:02,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:02,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:02,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:02,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:10:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:05,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 0 proven. 1281 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:10:05,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527929775] [2020-09-04 23:10:05,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:05,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-09-04 23:10:05,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042230410] [2020-09-04 23:10:05,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-09-04 23:10:05,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:05,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-09-04 23:10:05,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 23:10:05,737 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand 49 states. [2020-09-04 23:10:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:09,520 INFO L93 Difference]: Finished difference Result 227 states and 237 transitions. [2020-09-04 23:10:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-09-04 23:10:09,521 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 169 [2020-09-04 23:10:09,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:09,524 INFO L225 Difference]: With dead ends: 227 [2020-09-04 23:10:09,524 INFO L226 Difference]: Without dead ends: 190 [2020-09-04 23:10:09,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2639, Invalid=6291, Unknown=0, NotChecked=0, Total=8930 [2020-09-04 23:10:09,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-04 23:10:09,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-09-04 23:10:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-04 23:10:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2020-09-04 23:10:09,542 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 169 [2020-09-04 23:10:09,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:09,542 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2020-09-04 23:10:09,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-09-04 23:10:09,542 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2020-09-04 23:10:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-09-04 23:10:09,543 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:09,543 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:09,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-04 23:10:09,543 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:09,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:09,544 INFO L82 PathProgramCache]: Analyzing trace with hash -273166143, now seen corresponding path program 22 times [2020-09-04 23:10:09,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:09,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084361549] [2020-09-04 23:10:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:09,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:09,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:09,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:10:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:13,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 0 proven. 1408 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:10:13,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084361549] [2020-09-04 23:10:13,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:13,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-09-04 23:10:13,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810769447] [2020-09-04 23:10:13,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-09-04 23:10:13,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:13,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-09-04 23:10:13,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 23:10:13,266 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 51 states. [2020-09-04 23:10:17,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:17,212 INFO L93 Difference]: Finished difference Result 233 states and 243 transitions. [2020-09-04 23:10:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-09-04 23:10:17,213 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 175 [2020-09-04 23:10:17,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:17,215 INFO L225 Difference]: With dead ends: 233 [2020-09-04 23:10:17,215 INFO L226 Difference]: Without dead ends: 196 [2020-09-04 23:10:17,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2873, Invalid=6829, Unknown=0, NotChecked=0, Total=9702 [2020-09-04 23:10:17,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-09-04 23:10:17,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-09-04 23:10:17,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-09-04 23:10:17,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 197 transitions. [2020-09-04 23:10:17,243 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 197 transitions. Word has length 175 [2020-09-04 23:10:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:17,244 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 197 transitions. [2020-09-04 23:10:17,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-09-04 23:10:17,244 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 197 transitions. [2020-09-04 23:10:17,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-04 23:10:17,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:17,245 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:17,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-04 23:10:17,246 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:17,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:17,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1429615171, now seen corresponding path program 23 times [2020-09-04 23:10:17,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:17,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676959754] [2020-09-04 23:10:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:17,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:17,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:17,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:10:17,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1541 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:10:21,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676959754] [2020-09-04 23:10:21,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:21,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-09-04 23:10:21,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664656050] [2020-09-04 23:10:21,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-09-04 23:10:21,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:21,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-09-04 23:10:21,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=2077, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 23:10:21,233 INFO L87 Difference]: Start difference. First operand 192 states and 197 transitions. Second operand 53 states. [2020-09-04 23:10:25,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:25,420 INFO L93 Difference]: Finished difference Result 239 states and 249 transitions. [2020-09-04 23:10:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-09-04 23:10:25,421 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 181 [2020-09-04 23:10:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:25,423 INFO L225 Difference]: With dead ends: 239 [2020-09-04 23:10:25,423 INFO L226 Difference]: Without dead ends: 202 [2020-09-04 23:10:25,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=3117, Invalid=7389, Unknown=0, NotChecked=0, Total=10506 [2020-09-04 23:10:25,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-09-04 23:10:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-09-04 23:10:25,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-09-04 23:10:25,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2020-09-04 23:10:25,450 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 181 [2020-09-04 23:10:25,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:25,451 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2020-09-04 23:10:25,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-09-04 23:10:25,451 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2020-09-04 23:10:25,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-09-04 23:10:25,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:25,452 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:25,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-04 23:10:25,452 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:25,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:25,453 INFO L82 PathProgramCache]: Analyzing trace with hash -904847943, now seen corresponding path program 24 times [2020-09-04 23:10:25,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:25,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684077134] [2020-09-04 23:10:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:25,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:25,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:10:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:29,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1689 backedges. 0 proven. 1680 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:10:29,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684077134] [2020-09-04 23:10:29,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:29,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-09-04 23:10:29,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479771073] [2020-09-04 23:10:29,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-09-04 23:10:29,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:29,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-09-04 23:10:29,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=2238, Unknown=0, NotChecked=0, Total=2970 [2020-09-04 23:10:29,752 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 55 states. [2020-09-04 23:10:34,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:34,249 INFO L93 Difference]: Finished difference Result 245 states and 255 transitions. [2020-09-04 23:10:34,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-09-04 23:10:34,250 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 187 [2020-09-04 23:10:34,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:34,252 INFO L225 Difference]: With dead ends: 245 [2020-09-04 23:10:34,252 INFO L226 Difference]: Without dead ends: 208 [2020-09-04 23:10:34,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=3371, Invalid=7971, Unknown=0, NotChecked=0, Total=11342 [2020-09-04 23:10:34,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-09-04 23:10:34,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-09-04 23:10:34,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-04 23:10:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 209 transitions. [2020-09-04 23:10:34,284 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 209 transitions. Word has length 187 [2020-09-04 23:10:34,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:34,284 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 209 transitions. [2020-09-04 23:10:34,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-09-04 23:10:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 209 transitions. [2020-09-04 23:10:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-09-04 23:10:34,285 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:34,286 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:34,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-04 23:10:34,286 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:34,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:34,286 INFO L82 PathProgramCache]: Analyzing trace with hash 922976437, now seen corresponding path program 25 times [2020-09-04 23:10:34,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:34,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870804993] [2020-09-04 23:10:34,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:34,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:34,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:34,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:10:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:38,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 0 proven. 1825 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:10:38,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870804993] [2020-09-04 23:10:38,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:38,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-09-04 23:10:38,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486947797] [2020-09-04 23:10:38,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-09-04 23:10:38,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:38,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-09-04 23:10:38,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2020-09-04 23:10:38,913 INFO L87 Difference]: Start difference. First operand 204 states and 209 transitions. Second operand 57 states. [2020-09-04 23:10:43,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:43,843 INFO L93 Difference]: Finished difference Result 251 states and 261 transitions. [2020-09-04 23:10:43,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-09-04 23:10:43,843 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 193 [2020-09-04 23:10:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:43,845 INFO L225 Difference]: With dead ends: 251 [2020-09-04 23:10:43,845 INFO L226 Difference]: Without dead ends: 214 [2020-09-04 23:10:43,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3635, Invalid=8575, Unknown=0, NotChecked=0, Total=12210 [2020-09-04 23:10:43,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-09-04 23:10:43,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-09-04 23:10:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-09-04 23:10:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 215 transitions. [2020-09-04 23:10:43,881 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 215 transitions. Word has length 193 [2020-09-04 23:10:43,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:43,882 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 215 transitions. [2020-09-04 23:10:43,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-09-04 23:10:43,883 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 215 transitions. [2020-09-04 23:10:43,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-09-04 23:10:43,885 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:43,885 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:43,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-04 23:10:43,886 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:43,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:43,886 INFO L82 PathProgramCache]: Analyzing trace with hash -607734095, now seen corresponding path program 26 times [2020-09-04 23:10:43,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:43,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383014359] [2020-09-04 23:10:43,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:44,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:44,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:10:44,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1976 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:10:48,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383014359] [2020-09-04 23:10:48,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:48,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-09-04 23:10:48,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365097431] [2020-09-04 23:10:48,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-09-04 23:10:48,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:48,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-09-04 23:10:48,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=2578, Unknown=0, NotChecked=0, Total=3422 [2020-09-04 23:10:48,946 INFO L87 Difference]: Start difference. First operand 210 states and 215 transitions. Second operand 59 states. [2020-09-04 23:10:54,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:10:54,216 INFO L93 Difference]: Finished difference Result 257 states and 267 transitions. [2020-09-04 23:10:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-09-04 23:10:54,217 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 199 [2020-09-04 23:10:54,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:10:54,219 INFO L225 Difference]: With dead ends: 257 [2020-09-04 23:10:54,219 INFO L226 Difference]: Without dead ends: 220 [2020-09-04 23:10:54,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=3909, Invalid=9201, Unknown=0, NotChecked=0, Total=13110 [2020-09-04 23:10:54,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-04 23:10:54,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-09-04 23:10:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-09-04 23:10:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2020-09-04 23:10:54,248 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 199 [2020-09-04 23:10:54,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:10:54,248 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2020-09-04 23:10:54,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-09-04 23:10:54,248 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2020-09-04 23:10:54,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-09-04 23:10:54,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:10:54,249 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:10:54,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-04 23:10:54,249 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:10:54,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:10:54,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1597013933, now seen corresponding path program 27 times [2020-09-04 23:10:54,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:10:54,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855675479] [2020-09-04 23:10:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:10:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:54,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:10:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:54,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:10:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:10:59,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 0 proven. 2133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:10:59,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855675479] [2020-09-04 23:10:59,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:10:59,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-09-04 23:10:59,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703306695] [2020-09-04 23:10:59,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-09-04 23:10:59,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:10:59,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-09-04 23:10:59,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=2757, Unknown=0, NotChecked=0, Total=3660 [2020-09-04 23:10:59,592 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand 61 states. [2020-09-04 23:11:05,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:05,052 INFO L93 Difference]: Finished difference Result 263 states and 273 transitions. [2020-09-04 23:11:05,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-09-04 23:11:05,053 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 205 [2020-09-04 23:11:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:05,055 INFO L225 Difference]: With dead ends: 263 [2020-09-04 23:11:05,056 INFO L226 Difference]: Without dead ends: 226 [2020-09-04 23:11:05,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=4193, Invalid=9849, Unknown=0, NotChecked=0, Total=14042 [2020-09-04 23:11:05,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-09-04 23:11:05,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-09-04 23:11:05,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-09-04 23:11:05,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 227 transitions. [2020-09-04 23:11:05,088 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 227 transitions. Word has length 205 [2020-09-04 23:11:05,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:05,088 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 227 transitions. [2020-09-04 23:11:05,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-09-04 23:11:05,088 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 227 transitions. [2020-09-04 23:11:05,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-09-04 23:11:05,090 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:05,090 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:05,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-04 23:11:05,091 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:05,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:05,091 INFO L82 PathProgramCache]: Analyzing trace with hash -523854935, now seen corresponding path program 28 times [2020-09-04 23:11:05,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:05,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808559329] [2020-09-04 23:11:05,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:05,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:05,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:05,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:11:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:10,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 0 proven. 2296 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:11:10,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808559329] [2020-09-04 23:11:10,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:10,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-09-04 23:11:10,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250481717] [2020-09-04 23:11:10,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-09-04 23:11:10,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:10,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-09-04 23:11:10,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=2942, Unknown=0, NotChecked=0, Total=3906 [2020-09-04 23:11:10,654 INFO L87 Difference]: Start difference. First operand 222 states and 227 transitions. Second operand 63 states. [2020-09-04 23:11:16,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:16,524 INFO L93 Difference]: Finished difference Result 269 states and 279 transitions. [2020-09-04 23:11:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-09-04 23:11:16,525 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 211 [2020-09-04 23:11:16,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:16,527 INFO L225 Difference]: With dead ends: 269 [2020-09-04 23:11:16,527 INFO L226 Difference]: Without dead ends: 232 [2020-09-04 23:11:16,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=4487, Invalid=10519, Unknown=0, NotChecked=0, Total=15006 [2020-09-04 23:11:16,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-09-04 23:11:16,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2020-09-04 23:11:16,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-09-04 23:11:16,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 233 transitions. [2020-09-04 23:11:16,552 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 233 transitions. Word has length 211 [2020-09-04 23:11:16,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:16,553 INFO L479 AbstractCegarLoop]: Abstraction has 228 states and 233 transitions. [2020-09-04 23:11:16,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-09-04 23:11:16,553 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 233 transitions. [2020-09-04 23:11:16,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-09-04 23:11:16,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:16,555 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:16,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-04 23:11:16,555 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:16,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:16,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1262564699, now seen corresponding path program 29 times [2020-09-04 23:11:16,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:16,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924363353] [2020-09-04 23:11:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:16,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:16,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:16,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:11:16,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 0 proven. 2465 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:11:22,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924363353] [2020-09-04 23:11:22,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:22,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-09-04 23:11:22,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786181676] [2020-09-04 23:11:22,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-09-04 23:11:22,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:22,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-09-04 23:11:22,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=3133, Unknown=0, NotChecked=0, Total=4160 [2020-09-04 23:11:22,480 INFO L87 Difference]: Start difference. First operand 228 states and 233 transitions. Second operand 65 states. [2020-09-04 23:11:28,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:28,744 INFO L93 Difference]: Finished difference Result 275 states and 285 transitions. [2020-09-04 23:11:28,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-09-04 23:11:28,745 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 217 [2020-09-04 23:11:28,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:28,746 INFO L225 Difference]: With dead ends: 275 [2020-09-04 23:11:28,746 INFO L226 Difference]: Without dead ends: 238 [2020-09-04 23:11:28,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=4791, Invalid=11211, Unknown=0, NotChecked=0, Total=16002 [2020-09-04 23:11:28,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-09-04 23:11:28,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2020-09-04 23:11:28,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-09-04 23:11:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 239 transitions. [2020-09-04 23:11:28,784 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 239 transitions. Word has length 217 [2020-09-04 23:11:28,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:28,784 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 239 transitions. [2020-09-04 23:11:28,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-09-04 23:11:28,785 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 239 transitions. [2020-09-04 23:11:28,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-09-04 23:11:28,786 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:28,787 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:28,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-04 23:11:28,787 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:28,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:28,787 INFO L82 PathProgramCache]: Analyzing trace with hash 536792225, now seen corresponding path program 30 times [2020-09-04 23:11:28,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:28,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66744674] [2020-09-04 23:11:28,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:28,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:28,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:11:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 2649 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:11:35,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66744674] [2020-09-04 23:11:35,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:35,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-09-04 23:11:35,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502984798] [2020-09-04 23:11:35,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-09-04 23:11:35,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:35,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-09-04 23:11:35,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=3330, Unknown=0, NotChecked=0, Total=4422 [2020-09-04 23:11:35,148 INFO L87 Difference]: Start difference. First operand 234 states and 239 transitions. Second operand 67 states. [2020-09-04 23:11:41,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:41,887 INFO L93 Difference]: Finished difference Result 281 states and 291 transitions. [2020-09-04 23:11:41,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-09-04 23:11:41,889 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 223 [2020-09-04 23:11:41,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:41,890 INFO L225 Difference]: With dead ends: 281 [2020-09-04 23:11:41,890 INFO L226 Difference]: Without dead ends: 244 [2020-09-04 23:11:41,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3063 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=5105, Invalid=11925, Unknown=0, NotChecked=0, Total=17030 [2020-09-04 23:11:41,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-04 23:11:41,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2020-09-04 23:11:41,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-09-04 23:11:41,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2020-09-04 23:11:41,920 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 223 [2020-09-04 23:11:41,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:41,920 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2020-09-04 23:11:41,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-09-04 23:11:41,921 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2020-09-04 23:11:41,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-09-04 23:11:41,922 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:41,922 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:41,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-04 23:11:41,922 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:41,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:41,922 INFO L82 PathProgramCache]: Analyzing trace with hash 337404317, now seen corresponding path program 31 times [2020-09-04 23:11:41,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:41,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093346003] [2020-09-04 23:11:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:42,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:42,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:42,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:11:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 0 proven. 2821 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:11:48,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093346003] [2020-09-04 23:11:48,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:11:48,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-09-04 23:11:48,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484523200] [2020-09-04 23:11:48,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-09-04 23:11:48,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:11:48,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-09-04 23:11:48,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2020-09-04 23:11:48,759 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand 69 states. [2020-09-04 23:11:56,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:11:56,004 INFO L93 Difference]: Finished difference Result 287 states and 297 transitions. [2020-09-04 23:11:56,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-09-04 23:11:56,006 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 229 [2020-09-04 23:11:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:11:56,007 INFO L225 Difference]: With dead ends: 287 [2020-09-04 23:11:56,007 INFO L226 Difference]: Without dead ends: 250 [2020-09-04 23:11:56,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=5429, Invalid=12661, Unknown=0, NotChecked=0, Total=18090 [2020-09-04 23:11:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-04 23:11:56,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2020-09-04 23:11:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-09-04 23:11:56,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2020-09-04 23:11:56,035 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 229 [2020-09-04 23:11:56,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:11:56,035 INFO L479 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2020-09-04 23:11:56,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-09-04 23:11:56,035 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2020-09-04 23:11:56,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-09-04 23:11:56,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:11:56,036 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:11:56,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-04 23:11:56,037 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:11:56,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:11:56,037 INFO L82 PathProgramCache]: Analyzing trace with hash -346207847, now seen corresponding path program 32 times [2020-09-04 23:11:56,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:11:56,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841344386] [2020-09-04 23:11:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:11:56,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:56,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:11:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:11:56,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:11:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3017 backedges. 0 proven. 3008 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:12:03,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841344386] [2020-09-04 23:12:03,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:03,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-09-04 23:12:03,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818958028] [2020-09-04 23:12:03,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-09-04 23:12:03,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:03,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-09-04 23:12:03,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=3742, Unknown=0, NotChecked=0, Total=4970 [2020-09-04 23:12:03,402 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 71 states. [2020-09-04 23:12:11,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:11,733 INFO L93 Difference]: Finished difference Result 293 states and 303 transitions. [2020-09-04 23:12:11,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-09-04 23:12:11,734 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 235 [2020-09-04 23:12:11,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:11,736 INFO L225 Difference]: With dead ends: 293 [2020-09-04 23:12:11,736 INFO L226 Difference]: Without dead ends: 256 [2020-09-04 23:12:11,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=5763, Invalid=13419, Unknown=0, NotChecked=0, Total=19182 [2020-09-04 23:12:11,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-09-04 23:12:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-09-04 23:12:11,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-09-04 23:12:11,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 257 transitions. [2020-09-04 23:12:11,774 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 257 transitions. Word has length 235 [2020-09-04 23:12:11,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:11,774 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 257 transitions. [2020-09-04 23:12:11,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-09-04 23:12:11,774 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 257 transitions. [2020-09-04 23:12:11,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-09-04 23:12:11,776 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:11,777 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:11,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-04 23:12:11,777 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:11,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:11,777 INFO L82 PathProgramCache]: Analyzing trace with hash 615990421, now seen corresponding path program 33 times [2020-09-04 23:12:11,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:11,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551425915] [2020-09-04 23:12:11,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:11,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:11,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:12:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3201 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:12:19,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551425915] [2020-09-04 23:12:19,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:19,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-09-04 23:12:19,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557947811] [2020-09-04 23:12:19,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-09-04 23:12:19,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:19,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-09-04 23:12:19,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=3957, Unknown=0, NotChecked=0, Total=5256 [2020-09-04 23:12:19,756 INFO L87 Difference]: Start difference. First operand 252 states and 257 transitions. Second operand 73 states. [2020-09-04 23:12:28,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:28,258 INFO L93 Difference]: Finished difference Result 299 states and 309 transitions. [2020-09-04 23:12:28,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-09-04 23:12:28,259 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 241 [2020-09-04 23:12:28,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:28,262 INFO L225 Difference]: With dead ends: 299 [2020-09-04 23:12:28,262 INFO L226 Difference]: Without dead ends: 262 [2020-09-04 23:12:28,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=6107, Invalid=14199, Unknown=0, NotChecked=0, Total=20306 [2020-09-04 23:12:28,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-09-04 23:12:28,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2020-09-04 23:12:28,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-04 23:12:28,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 263 transitions. [2020-09-04 23:12:28,309 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 263 transitions. Word has length 241 [2020-09-04 23:12:28,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:28,310 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 263 transitions. [2020-09-04 23:12:28,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-09-04 23:12:28,310 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 263 transitions. [2020-09-04 23:12:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-09-04 23:12:28,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:28,312 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:28,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-04 23:12:28,312 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:28,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:28,313 INFO L82 PathProgramCache]: Analyzing trace with hash 533729937, now seen corresponding path program 34 times [2020-09-04 23:12:28,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:28,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232340437] [2020-09-04 23:12:28,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:28,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:28,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:28,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:12:28,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3409 backedges. 0 proven. 3400 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:12:37,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232340437] [2020-09-04 23:12:37,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:37,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-09-04 23:12:37,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414148437] [2020-09-04 23:12:37,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-09-04 23:12:37,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:37,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-09-04 23:12:37,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1372, Invalid=4178, Unknown=0, NotChecked=0, Total=5550 [2020-09-04 23:12:37,206 INFO L87 Difference]: Start difference. First operand 258 states and 263 transitions. Second operand 75 states. [2020-09-04 23:12:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:12:46,574 INFO L93 Difference]: Finished difference Result 305 states and 315 transitions. [2020-09-04 23:12:46,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-09-04 23:12:46,575 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 247 [2020-09-04 23:12:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:12:46,576 INFO L225 Difference]: With dead ends: 305 [2020-09-04 23:12:46,576 INFO L226 Difference]: Without dead ends: 268 [2020-09-04 23:12:46,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=6461, Invalid=15001, Unknown=0, NotChecked=0, Total=21462 [2020-09-04 23:12:46,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-09-04 23:12:46,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2020-09-04 23:12:46,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-09-04 23:12:46,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 269 transitions. [2020-09-04 23:12:46,625 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 269 transitions. Word has length 247 [2020-09-04 23:12:46,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:12:46,625 INFO L479 AbstractCegarLoop]: Abstraction has 264 states and 269 transitions. [2020-09-04 23:12:46,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-09-04 23:12:46,625 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 269 transitions. [2020-09-04 23:12:46,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-09-04 23:12:46,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:12:46,627 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:12:46,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-04 23:12:46,627 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:12:46,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:12:46,628 INFO L82 PathProgramCache]: Analyzing trace with hash -654478451, now seen corresponding path program 35 times [2020-09-04 23:12:46,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:12:46,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807541401] [2020-09-04 23:12:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:12:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:46,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:12:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:46,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:12:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:12:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3614 backedges. 0 proven. 3605 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:12:55,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807541401] [2020-09-04 23:12:55,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:12:55,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-09-04 23:12:55,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293799172] [2020-09-04 23:12:55,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-09-04 23:12:55,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:12:55,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-09-04 23:12:55,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1447, Invalid=4405, Unknown=0, NotChecked=0, Total=5852 [2020-09-04 23:12:55,916 INFO L87 Difference]: Start difference. First operand 264 states and 269 transitions. Second operand 77 states. [2020-09-04 23:13:06,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:06,016 INFO L93 Difference]: Finished difference Result 311 states and 321 transitions. [2020-09-04 23:13:06,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-09-04 23:13:06,018 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 253 [2020-09-04 23:13:06,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:06,019 INFO L225 Difference]: With dead ends: 311 [2020-09-04 23:13:06,019 INFO L226 Difference]: Without dead ends: 274 [2020-09-04 23:13:06,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=6825, Invalid=15825, Unknown=0, NotChecked=0, Total=22650 [2020-09-04 23:13:06,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-09-04 23:13:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2020-09-04 23:13:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-09-04 23:13:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 275 transitions. [2020-09-04 23:13:06,076 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 275 transitions. Word has length 253 [2020-09-04 23:13:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:06,077 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 275 transitions. [2020-09-04 23:13:06,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-09-04 23:13:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 275 transitions. [2020-09-04 23:13:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-09-04 23:13:06,078 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:06,079 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:06,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-04 23:13:06,079 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:06,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:06,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1522194551, now seen corresponding path program 36 times [2020-09-04 23:13:06,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:06,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1508545736] [2020-09-04 23:13:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:06,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:06,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:06,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:13:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 0 proven. 3816 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:13:16,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1508545736] [2020-09-04 23:13:16,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:16,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-09-04 23:13:16,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360891236] [2020-09-04 23:13:16,224 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-09-04 23:13:16,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:16,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-09-04 23:13:16,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 23:13:16,225 INFO L87 Difference]: Start difference. First operand 270 states and 275 transitions. Second operand 79 states. [2020-09-04 23:13:27,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:27,384 INFO L93 Difference]: Finished difference Result 317 states and 327 transitions. [2020-09-04 23:13:27,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-09-04 23:13:27,386 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 259 [2020-09-04 23:13:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:27,387 INFO L225 Difference]: With dead ends: 317 [2020-09-04 23:13:27,388 INFO L226 Difference]: Without dead ends: 280 [2020-09-04 23:13:27,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=7199, Invalid=16671, Unknown=0, NotChecked=0, Total=23870 [2020-09-04 23:13:27,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-04 23:13:27,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2020-09-04 23:13:27,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-09-04 23:13:27,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 281 transitions. [2020-09-04 23:13:27,425 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 281 transitions. Word has length 259 [2020-09-04 23:13:27,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:27,425 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 281 transitions. [2020-09-04 23:13:27,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-09-04 23:13:27,425 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 281 transitions. [2020-09-04 23:13:27,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-09-04 23:13:27,427 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:27,427 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:27,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-04 23:13:27,427 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:27,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:27,428 INFO L82 PathProgramCache]: Analyzing trace with hash -295899515, now seen corresponding path program 37 times [2020-09-04 23:13:27,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:27,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8882177] [2020-09-04 23:13:27,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:27,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:27,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:13:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4042 backedges. 0 proven. 4033 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:13:38,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8882177] [2020-09-04 23:13:38,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:13:38,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-09-04 23:13:38,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789829657] [2020-09-04 23:13:38,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-09-04 23:13:38,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:13:38,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-09-04 23:13:38,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=4877, Unknown=0, NotChecked=0, Total=6480 [2020-09-04 23:13:38,578 INFO L87 Difference]: Start difference. First operand 276 states and 281 transitions. Second operand 81 states. [2020-09-04 23:13:50,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:13:50,629 INFO L93 Difference]: Finished difference Result 323 states and 333 transitions. [2020-09-04 23:13:50,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-09-04 23:13:50,631 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 265 [2020-09-04 23:13:50,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:13:50,633 INFO L225 Difference]: With dead ends: 323 [2020-09-04 23:13:50,633 INFO L226 Difference]: Without dead ends: 286 [2020-09-04 23:13:50,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=7583, Invalid=17539, Unknown=0, NotChecked=0, Total=25122 [2020-09-04 23:13:50,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-09-04 23:13:50,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-09-04 23:13:50,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-09-04 23:13:50,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 287 transitions. [2020-09-04 23:13:50,672 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 287 transitions. Word has length 265 [2020-09-04 23:13:50,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:13:50,672 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 287 transitions. [2020-09-04 23:13:50,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-09-04 23:13:50,672 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 287 transitions. [2020-09-04 23:13:50,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-09-04 23:13:50,675 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:13:50,675 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:13:50,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-04 23:13:50,675 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:13:50,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:13:50,676 INFO L82 PathProgramCache]: Analyzing trace with hash -290813823, now seen corresponding path program 38 times [2020-09-04 23:13:50,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:13:50,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672849964] [2020-09-04 23:13:50,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:13:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:50,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:13:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:13:50,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:13:50,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:03,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4265 backedges. 0 proven. 4256 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:14:03,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672849964] [2020-09-04 23:14:03,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:03,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-09-04 23:14:03,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192690711] [2020-09-04 23:14:03,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-09-04 23:14:03,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:03,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-09-04 23:14:03,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5122, Unknown=0, NotChecked=0, Total=6806 [2020-09-04 23:14:03,021 INFO L87 Difference]: Start difference. First operand 282 states and 287 transitions. Second operand 83 states. [2020-09-04 23:14:16,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:16,897 INFO L93 Difference]: Finished difference Result 329 states and 339 transitions. [2020-09-04 23:14:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-09-04 23:14:16,898 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 271 [2020-09-04 23:14:16,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:16,900 INFO L225 Difference]: With dead ends: 329 [2020-09-04 23:14:16,900 INFO L226 Difference]: Without dead ends: 292 [2020-09-04 23:14:16,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=7977, Invalid=18429, Unknown=0, NotChecked=0, Total=26406 [2020-09-04 23:14:16,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-09-04 23:14:16,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2020-09-04 23:14:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-09-04 23:14:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 293 transitions. [2020-09-04 23:14:16,951 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 293 transitions. Word has length 271 [2020-09-04 23:14:16,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:16,951 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 293 transitions. [2020-09-04 23:14:16,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-09-04 23:14:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 293 transitions. [2020-09-04 23:14:16,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-09-04 23:14:16,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:16,954 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:16,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-04 23:14:16,954 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:16,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:16,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1833153917, now seen corresponding path program 39 times [2020-09-04 23:14:16,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:16,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372810432] [2020-09-04 23:14:16,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:17,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:17,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:17,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:14:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4494 backedges. 0 proven. 4485 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:14:30,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372810432] [2020-09-04 23:14:30,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:14:30,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-09-04 23:14:30,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946723612] [2020-09-04 23:14:30,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-09-04 23:14:30,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:14:30,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-09-04 23:14:30,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=5373, Unknown=0, NotChecked=0, Total=7140 [2020-09-04 23:14:30,726 INFO L87 Difference]: Start difference. First operand 288 states and 293 transitions. Second operand 85 states. [2020-09-04 23:14:45,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:14:45,793 INFO L93 Difference]: Finished difference Result 335 states and 345 transitions. [2020-09-04 23:14:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-09-04 23:14:45,795 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 277 [2020-09-04 23:14:45,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:14:45,796 INFO L225 Difference]: With dead ends: 335 [2020-09-04 23:14:45,797 INFO L226 Difference]: Without dead ends: 298 [2020-09-04 23:14:45,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=8381, Invalid=19341, Unknown=0, NotChecked=0, Total=27722 [2020-09-04 23:14:45,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-09-04 23:14:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2020-09-04 23:14:45,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-09-04 23:14:45,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 299 transitions. [2020-09-04 23:14:45,857 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 299 transitions. Word has length 277 [2020-09-04 23:14:45,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:14:45,858 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 299 transitions. [2020-09-04 23:14:45,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-09-04 23:14:45,858 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 299 transitions. [2020-09-04 23:14:45,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-09-04 23:14:45,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:14:45,861 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:14:45,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-09-04 23:14:45,861 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:14:45,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:14:45,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2045654393, now seen corresponding path program 40 times [2020-09-04 23:14:45,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:14:45,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579309987] [2020-09-04 23:14:45,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:14:45,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:14:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:14:46,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:14:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4729 backedges. 0 proven. 4720 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:15:01,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579309987] [2020-09-04 23:15:01,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:01,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-09-04 23:15:01,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024639173] [2020-09-04 23:15:01,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-09-04 23:15:01,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:01,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-09-04 23:15:01,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=5630, Unknown=0, NotChecked=0, Total=7482 [2020-09-04 23:15:01,026 INFO L87 Difference]: Start difference. First operand 294 states and 299 transitions. Second operand 87 states. [2020-09-04 23:15:19,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:19,267 INFO L93 Difference]: Finished difference Result 341 states and 351 transitions. [2020-09-04 23:15:19,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-09-04 23:15:19,269 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 283 [2020-09-04 23:15:19,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:19,270 INFO L225 Difference]: With dead ends: 341 [2020-09-04 23:15:19,271 INFO L226 Difference]: Without dead ends: 304 [2020-09-04 23:15:19,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 29.5s TimeCoverageRelationStatistics Valid=8795, Invalid=20275, Unknown=0, NotChecked=0, Total=29070 [2020-09-04 23:15:19,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-09-04 23:15:19,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2020-09-04 23:15:19,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-09-04 23:15:19,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 305 transitions. [2020-09-04 23:15:19,351 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 305 transitions. Word has length 283 [2020-09-04 23:15:19,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:19,351 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 305 transitions. [2020-09-04 23:15:19,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-09-04 23:15:19,351 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 305 transitions. [2020-09-04 23:15:19,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-09-04 23:15:19,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:19,354 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:19,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-09-04 23:15:19,354 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:19,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:19,354 INFO L82 PathProgramCache]: Analyzing trace with hash 689948789, now seen corresponding path program 41 times [2020-09-04 23:15:19,355 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:19,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196455148] [2020-09-04 23:15:19,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:19,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:19,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:19,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:15:19,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:36,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4961 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:15:36,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196455148] [2020-09-04 23:15:36,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:36,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-09-04 23:15:36,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068176104] [2020-09-04 23:15:36,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-09-04 23:15:36,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:36,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-09-04 23:15:36,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=5893, Unknown=0, NotChecked=0, Total=7832 [2020-09-04 23:15:36,554 INFO L87 Difference]: Start difference. First operand 300 states and 305 transitions. Second operand 89 states. [2020-09-04 23:15:56,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:56,945 INFO L93 Difference]: Finished difference Result 347 states and 357 transitions. [2020-09-04 23:15:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-09-04 23:15:56,947 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 289 [2020-09-04 23:15:56,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:56,949 INFO L225 Difference]: With dead ends: 347 [2020-09-04 23:15:56,950 INFO L226 Difference]: Without dead ends: 310 [2020-09-04 23:15:56,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5538 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=9219, Invalid=21231, Unknown=0, NotChecked=0, Total=30450 [2020-09-04 23:15:56,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-09-04 23:15:57,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2020-09-04 23:15:57,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-09-04 23:15:57,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 311 transitions. [2020-09-04 23:15:57,003 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 311 transitions. Word has length 289 [2020-09-04 23:15:57,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:57,003 INFO L479 AbstractCegarLoop]: Abstraction has 306 states and 311 transitions. [2020-09-04 23:15:57,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-09-04 23:15:57,004 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 311 transitions. [2020-09-04 23:15:57,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-09-04 23:15:57,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:57,005 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:57,006 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-09-04 23:15:57,006 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:57,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:57,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1342058097, now seen corresponding path program 42 times [2020-09-04 23:15:57,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:57,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907773978] [2020-09-04 23:15:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:57,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:57,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:15:57,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:02,409 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:16:16,964 INFO L134 CoverageAnalysis]: Checked inductivity of 5217 backedges. 0 proven. 5208 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:16:16,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907773978] [2020-09-04 23:16:16,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:16:16,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2020-09-04 23:16:16,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647306544] [2020-09-04 23:16:16,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-09-04 23:16:16,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:16:16,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-09-04 23:16:16,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2028, Invalid=6162, Unknown=0, NotChecked=0, Total=8190 [2020-09-04 23:16:16,966 INFO L87 Difference]: Start difference. First operand 306 states and 311 transitions. Second operand 91 states. [2020-09-04 23:16:38,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:16:38,081 INFO L93 Difference]: Finished difference Result 353 states and 363 transitions. [2020-09-04 23:16:38,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-09-04 23:16:38,084 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 295 [2020-09-04 23:16:38,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:16:38,086 INFO L225 Difference]: With dead ends: 353 [2020-09-04 23:16:38,086 INFO L226 Difference]: Without dead ends: 316 [2020-09-04 23:16:38,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=9653, Invalid=22209, Unknown=0, NotChecked=0, Total=31862 [2020-09-04 23:16:38,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-09-04 23:16:38,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2020-09-04 23:16:38,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-09-04 23:16:38,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 317 transitions. [2020-09-04 23:16:38,161 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 317 transitions. Word has length 295 [2020-09-04 23:16:38,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:16:38,161 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 317 transitions. [2020-09-04 23:16:38,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-09-04 23:16:38,161 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 317 transitions. [2020-09-04 23:16:38,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-09-04 23:16:38,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:16:38,164 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:16:38,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-09-04 23:16:38,164 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:16:38,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:16:38,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1079977837, now seen corresponding path program 43 times [2020-09-04 23:16:38,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:16:38,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066219312] [2020-09-04 23:16:38,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:16:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:38,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:16:38,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:16:38,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:16:38,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5470 backedges. 0 proven. 5461 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:17:01,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066219312] [2020-09-04 23:17:01,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:01,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-09-04 23:17:01,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95110240] [2020-09-04 23:17:01,136 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-09-04 23:17:01,136 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:01,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-09-04 23:17:01,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2020-09-04 23:17:01,137 INFO L87 Difference]: Start difference. First operand 312 states and 317 transitions. Second operand 93 states. [2020-09-04 23:17:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:17:27,346 INFO L93 Difference]: Finished difference Result 359 states and 369 transitions. [2020-09-04 23:17:27,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-09-04 23:17:27,350 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 301 [2020-09-04 23:17:27,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:17:27,352 INFO L225 Difference]: With dead ends: 359 [2020-09-04 23:17:27,353 INFO L226 Difference]: Without dead ends: 322 [2020-09-04 23:17:27,355 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6066 ImplicationChecksByTransitivity, 44.1s TimeCoverageRelationStatistics Valid=10097, Invalid=23209, Unknown=0, NotChecked=0, Total=33306 [2020-09-04 23:17:27,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-09-04 23:17:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2020-09-04 23:17:27,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-09-04 23:17:27,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 323 transitions. [2020-09-04 23:17:27,426 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 323 transitions. Word has length 301 [2020-09-04 23:17:27,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:17:27,427 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 323 transitions. [2020-09-04 23:17:27,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-09-04 23:17:27,427 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 323 transitions. [2020-09-04 23:17:27,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-09-04 23:17:27,429 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:17:27,430 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:17:27,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-09-04 23:17:27,430 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:17:27,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:17:27,431 INFO L82 PathProgramCache]: Analyzing trace with hash -2067238039, now seen corresponding path program 44 times [2020-09-04 23:17:27,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:17:27,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899131252] [2020-09-04 23:17:27,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:17:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:27,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:17:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:27,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:17:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:17:35,407 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:17:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5729 backedges. 0 proven. 5720 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:17:53,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899131252] [2020-09-04 23:17:53,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:17:53,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2020-09-04 23:17:53,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271571118] [2020-09-04 23:17:53,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-09-04 23:17:53,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:17:53,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-09-04 23:17:53,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=6718, Unknown=0, NotChecked=0, Total=8930 [2020-09-04 23:17:53,191 INFO L87 Difference]: Start difference. First operand 318 states and 323 transitions. Second operand 95 states. [2020-09-04 23:18:22,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:18:22,626 INFO L93 Difference]: Finished difference Result 365 states and 375 transitions. [2020-09-04 23:18:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-09-04 23:18:22,629 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 307 [2020-09-04 23:18:22,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:18:22,631 INFO L225 Difference]: With dead ends: 365 [2020-09-04 23:18:22,632 INFO L226 Difference]: Without dead ends: 328 [2020-09-04 23:18:22,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6339 ImplicationChecksByTransitivity, 50.4s TimeCoverageRelationStatistics Valid=10551, Invalid=24231, Unknown=0, NotChecked=0, Total=34782 [2020-09-04 23:18:22,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-09-04 23:18:22,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2020-09-04 23:18:22,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-09-04 23:18:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 329 transitions. [2020-09-04 23:18:22,689 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 329 transitions. Word has length 307 [2020-09-04 23:18:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:18:22,690 INFO L479 AbstractCegarLoop]: Abstraction has 324 states and 329 transitions. [2020-09-04 23:18:22,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-09-04 23:18:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 329 transitions. [2020-09-04 23:18:22,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-09-04 23:18:22,691 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:18:22,692 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:18:22,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-09-04 23:18:22,692 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:18:22,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:18:22,692 INFO L82 PathProgramCache]: Analyzing trace with hash -1670393243, now seen corresponding path program 45 times [2020-09-04 23:18:22,692 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:18:22,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503388405] [2020-09-04 23:18:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:18:22,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:22,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:18:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:22,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:18:22,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:18:34,371 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:18:36,275 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:18:37,118 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:18:37,551 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:18:37,974 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:18:49,305 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:18:52,427 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:18:52,898 INFO L134 CoverageAnalysis]: Checked inductivity of 5994 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:18:52,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503388405] [2020-09-04 23:18:52,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:18:52,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2020-09-04 23:18:52,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094102563] [2020-09-04 23:18:52,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-09-04 23:18:52,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:18:52,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-09-04 23:18:52,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=7005, Unknown=0, NotChecked=0, Total=9312 [2020-09-04 23:18:52,902 INFO L87 Difference]: Start difference. First operand 324 states and 329 transitions. Second operand 97 states. [2020-09-04 23:19:27,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:19:27,788 INFO L93 Difference]: Finished difference Result 371 states and 381 transitions. [2020-09-04 23:19:27,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-09-04 23:19:27,792 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 313 [2020-09-04 23:19:27,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:19:27,793 INFO L225 Difference]: With dead ends: 371 [2020-09-04 23:19:27,794 INFO L226 Difference]: Without dead ends: 334 [2020-09-04 23:19:27,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6618 ImplicationChecksByTransitivity, 58.9s TimeCoverageRelationStatistics Valid=11015, Invalid=25275, Unknown=0, NotChecked=0, Total=36290 [2020-09-04 23:19:27,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-09-04 23:19:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2020-09-04 23:19:27,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-09-04 23:19:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 335 transitions. [2020-09-04 23:19:27,846 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 335 transitions. Word has length 313 [2020-09-04 23:19:27,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:19:27,846 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 335 transitions. [2020-09-04 23:19:27,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-09-04 23:19:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 335 transitions. [2020-09-04 23:19:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-09-04 23:19:27,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:19:27,849 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:19:27,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-09-04 23:19:27,850 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:19:27,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:19:27,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1220869023, now seen corresponding path program 46 times [2020-09-04 23:19:27,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:19:27,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145609547] [2020-09-04 23:19:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:19:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:28,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:19:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:28,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:19:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:19:28,567 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:28,718 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:28,853 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:29,008 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:29,297 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:29,621 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:29,806 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:29,996 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:30,198 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:30,377 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:30,577 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:30,956 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:31,414 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:31,642 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:31,873 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:32,557 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:32,818 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:33,086 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:33,345 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:33,627 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:34,424 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:35,008 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:35,282 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:35,576 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:35,901 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:36,539 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:37,182 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:37,513 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:37,850 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:38,873 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:39,258 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:39,625 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:40,730 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:41,104 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:41,847 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:42,273 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:42,673 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:43,478 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:44,338 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:45,223 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:46,364 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:46,849 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:47,310 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:47,799 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:48,758 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:50,805 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:51,379 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:51,966 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:52,577 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:53,167 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:53,762 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:54,367 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:54,978 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:55,584 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:56,200 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:56,762 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:57,410 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:58,067 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:58,720 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:19:59,377 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:00,028 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:00,695 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:01,366 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:02,051 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:02,782 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:03,512 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:04,250 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6265 backedges. 0 proven. 6256 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:20:04,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145609547] [2020-09-04 23:20:04,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:20:04,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2020-09-04 23:20:04,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35450264] [2020-09-04 23:20:04,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-09-04 23:20:04,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:20:04,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-09-04 23:20:04,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2404, Invalid=7298, Unknown=0, NotChecked=0, Total=9702 [2020-09-04 23:20:04,740 INFO L87 Difference]: Start difference. First operand 330 states and 335 transitions. Second operand 99 states. [2020-09-04 23:20:24,053 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-09-04 23:20:42,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:20:42,625 INFO L93 Difference]: Finished difference Result 377 states and 387 transitions. [2020-09-04 23:20:42,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2020-09-04 23:20:42,630 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 319 [2020-09-04 23:20:42,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:20:42,632 INFO L225 Difference]: With dead ends: 377 [2020-09-04 23:20:42,633 INFO L226 Difference]: Without dead ends: 340 [2020-09-04 23:20:42,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 70.3s TimeCoverageRelationStatistics Valid=11489, Invalid=26341, Unknown=0, NotChecked=0, Total=37830 [2020-09-04 23:20:42,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-09-04 23:20:42,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2020-09-04 23:20:42,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-09-04 23:20:42,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 341 transitions. [2020-09-04 23:20:42,686 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 341 transitions. Word has length 319 [2020-09-04 23:20:42,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:20:42,687 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 341 transitions. [2020-09-04 23:20:42,687 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-09-04 23:20:42,687 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 341 transitions. [2020-09-04 23:20:42,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-09-04 23:20:42,688 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:20:42,688 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:20:42,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-09-04 23:20:42,689 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:20:42,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:20:42,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1908394333, now seen corresponding path program 47 times [2020-09-04 23:20:42,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:20:42,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799197466] [2020-09-04 23:20:42,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:20:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:42,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:20:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:42,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 23:20:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:20:43,416 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:43,576 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:43,873 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:44,051 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:44,226 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:44,423 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:44,579 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:44,777 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:44,989 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:45,210 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:45,410 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:45,636 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:45,876 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:46,117 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:46,360 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:46,617 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:46,860 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:47,125 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:47,392 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:47,676 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:47,959 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:49,238 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:49,592 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:49,950 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:50,318 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:50,680 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:51,051 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:51,423 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:51,792 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:52,172 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:52,559 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:52,957 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:53,365 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:53,764 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:54,172 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:54,584 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:55,037 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:55,488 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:55,858 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:56,319 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:56,792 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:57,268 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:57,746 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:58,220 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:58,713 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:59,207 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:20:59,714 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:00,183 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:00,684 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:01,186 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:01,706 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:02,192 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:02,732 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:03,246 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:03,792 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:04,331 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:04,863 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:05,410 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:05,977 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:06,541 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:07,080 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:07,663 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:08,220 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:08,821 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:09,376 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:09,967 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:10,566 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:11,170 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:11,825 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:12,407 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:13,044 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:13,655 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:14,307 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:14,929 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:15,586 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:16,236 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:16,909 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:17,575 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:18,234 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:18,928 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:19,609 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:20,323 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:21,008 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:21,732 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:22,434 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:23,171 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:23,876 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:24,630 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:25,355 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-09-04 23:21:25,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6542 backedges. 0 proven. 6533 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:21:25,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799197466] [2020-09-04 23:21:25,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:21:25,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2020-09-04 23:21:25,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248780018] [2020-09-04 23:21:25,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-09-04 23:21:25,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:21:25,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-09-04 23:21:25,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2503, Invalid=7597, Unknown=0, NotChecked=0, Total=10100 [2020-09-04 23:21:25,877 INFO L87 Difference]: Start difference. First operand 336 states and 341 transitions. Second operand 101 states. [2020-09-04 23:21:27,450 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 30