/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/heavy-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:45:19,963 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:45:19,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:45:20,005 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:45:20,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:45:20,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:45:20,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:45:20,019 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:45:20,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:45:20,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:45:20,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:45:20,025 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:45:20,025 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:45:20,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:45:20,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:45:20,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:45:20,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:45:20,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:45:20,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:45:20,044 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:45:20,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:45:20,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:45:20,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:45:20,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:45:20,060 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:45:20,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:45:20,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:45:20,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:45:20,079 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:45:20,092 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:45:20,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:45:20,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:45:20,094 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:45:20,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:45:20,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:45:20,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:45:20,095 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:45:20,095 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:45:20,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:45:20,096 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:45:20,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:45:20,097 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:45:20,097 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:45:20,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:45:20,098 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:45:20,098 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:45:20,098 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:45:20,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:45:20,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:45:20,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:45:20,099 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:45:20,099 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:45:20,415 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:45:20,437 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:45:20,441 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:45:20,448 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:45:20,449 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:45:20,450 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2020-08-22 19:45:20,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ea907de0/bb6e36092ac94a13bf18d57c7c27e9f2/FLAG50bba2c26 [2020-08-22 19:45:20,937 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:45:20,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-2.c [2020-08-22 19:45:20,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ea907de0/bb6e36092ac94a13bf18d57c7c27e9f2/FLAG50bba2c26 [2020-08-22 19:45:21,314 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ea907de0/bb6e36092ac94a13bf18d57c7c27e9f2 [2020-08-22 19:45:21,325 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:45:21,327 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:45:21,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:45:21,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:45:21,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:45:21,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:45:21" (1/1) ... [2020-08-22 19:45:21,335 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7759fc44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:21, skipping insertion in model container [2020-08-22 19:45:21,335 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:45:21" (1/1) ... [2020-08-22 19:45:21,343 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:45:21,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:45:21,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:45:21,549 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:45:21,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:45:21,709 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:45:21,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:21 WrapperNode [2020-08-22 19:45:21,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:45:21,710 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:45:21,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:45:21,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:45:21,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:21" (1/1) ... [2020-08-22 19:45:21,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:21" (1/1) ... [2020-08-22 19:45:21,733 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:21" (1/1) ... [2020-08-22 19:45:21,734 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:21" (1/1) ... [2020-08-22 19:45:21,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:21" (1/1) ... [2020-08-22 19:45:21,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:21" (1/1) ... [2020-08-22 19:45:21,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:21" (1/1) ... [2020-08-22 19:45:21,763 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:45:21,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:45:21,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:45:21,764 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:45:21,765 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:45:21,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:45:21,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:45:21,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:45:21,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:45:21,818 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:45:21,818 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:45:21,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:45:21,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:45:21,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:45:21,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-08-22 19:45:21,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:45:21,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:45:22,083 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:45:22,083 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 19:45:22,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:45:22 BoogieIcfgContainer [2020-08-22 19:45:22,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:45:22,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:45:22,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:45:22,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:45:22,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:45:21" (1/3) ... [2020-08-22 19:45:22,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e43c876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:45:22, skipping insertion in model container [2020-08-22 19:45:22,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:21" (2/3) ... [2020-08-22 19:45:22,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e43c876 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:45:22, skipping insertion in model container [2020-08-22 19:45:22,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:45:22" (3/3) ... [2020-08-22 19:45:22,104 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2020-08-22 19:45:22,118 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:45:22,125 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:45:22,153 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:45:22,178 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:45:22,178 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:45:22,178 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:45:22,178 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:45:22,178 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:45:22,179 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:45:22,179 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:45:22,179 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:45:22,193 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-22 19:45:22,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 19:45:22,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:22,202 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] [2020-08-22 19:45:22,202 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:22,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:22,208 INFO L82 PathProgramCache]: Analyzing trace with hash 245897808, now seen corresponding path program 1 times [2020-08-22 19:45:22,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:22,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570140241] [2020-08-22 19:45:22,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:22,265 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:22,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:22,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570140241] [2020-08-22 19:45:22,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:22,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:45:22,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357755233] [2020-08-22 19:45:22,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:45:22,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:22,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:45:22,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:45:22,442 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-22 19:45:22,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:22,595 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2020-08-22 19:45:22,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:45:22,597 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 19:45:22,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:22,607 INFO L225 Difference]: With dead ends: 98 [2020-08-22 19:45:22,608 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 19:45:22,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:45:22,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 19:45:22,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2020-08-22 19:45:22,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 19:45:22,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-22 19:45:22,649 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 20 [2020-08-22 19:45:22,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:22,650 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-22 19:45:22,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:45:22,650 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-22 19:45:22,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 19:45:22,651 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:22,651 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] [2020-08-22 19:45:22,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:45:22,652 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:22,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:22,652 INFO L82 PathProgramCache]: Analyzing trace with hash 245856485, now seen corresponding path program 1 times [2020-08-22 19:45:22,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:22,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239710974] [2020-08-22 19:45:22,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:22,656 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:22,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:22,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:22,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:22,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239710974] [2020-08-22 19:45:22,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:22,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:45:22,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555268028] [2020-08-22 19:45:22,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:45:22,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:22,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:45:22,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:45:22,759 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 4 states. [2020-08-22 19:45:22,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:22,958 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-08-22 19:45:22,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:45:22,959 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-08-22 19:45:22,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:22,961 INFO L225 Difference]: With dead ends: 88 [2020-08-22 19:45:22,961 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 19:45:22,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:45:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 19:45:22,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 40. [2020-08-22 19:45:22,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 19:45:22,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-08-22 19:45:22,991 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 20 [2020-08-22 19:45:22,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:22,992 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-08-22 19:45:22,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:45:22,992 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-08-22 19:45:22,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 19:45:22,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:22,995 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] [2020-08-22 19:45:22,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:45:22,995 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:22,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:22,996 INFO L82 PathProgramCache]: Analyzing trace with hash 352436069, now seen corresponding path program 1 times [2020-08-22 19:45:22,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:22,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291371426] [2020-08-22 19:45:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:23,025 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:23,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:23,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:23,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:23,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:23,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291371426] [2020-08-22 19:45:23,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:23,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:45:23,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473334576] [2020-08-22 19:45:23,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:45:23,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:23,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:45:23,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:45:23,124 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 4 states. [2020-08-22 19:45:23,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:23,291 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-08-22 19:45:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:45:23,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-08-22 19:45:23,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:23,294 INFO L225 Difference]: With dead ends: 100 [2020-08-22 19:45:23,294 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 19:45:23,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:45:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 19:45:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 41. [2020-08-22 19:45:23,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 19:45:23,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-08-22 19:45:23,303 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 26 [2020-08-22 19:45:23,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:23,304 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-08-22 19:45:23,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:45:23,304 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-08-22 19:45:23,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 19:45:23,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:23,305 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] [2020-08-22 19:45:23,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:45:23,306 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:23,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:23,306 INFO L82 PathProgramCache]: Analyzing trace with hash -80258988, now seen corresponding path program 1 times [2020-08-22 19:45:23,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:23,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458127005] [2020-08-22 19:45:23,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:23,318 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:23,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:23,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:23,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458127005] [2020-08-22 19:45:23,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:23,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:45:23,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755486060] [2020-08-22 19:45:23,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:45:23,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:23,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:45:23,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:45:23,384 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 4 states. [2020-08-22 19:45:23,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:23,491 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-08-22 19:45:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:45:23,492 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-08-22 19:45:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:23,493 INFO L225 Difference]: With dead ends: 79 [2020-08-22 19:45:23,493 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 19:45:23,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:45:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 19:45:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2020-08-22 19:45:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 19:45:23,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-08-22 19:45:23,501 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 32 [2020-08-22 19:45:23,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:23,502 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-08-22 19:45:23,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:45:23,502 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-08-22 19:45:23,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 19:45:23,503 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:23,503 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, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:23,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:45:23,504 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:23,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:23,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1305862455, now seen corresponding path program 1 times [2020-08-22 19:45:23,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:23,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670793030] [2020-08-22 19:45:23,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:23,516 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:23,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:23,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:23,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670793030] [2020-08-22 19:45:23,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:23,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:45:23,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400087749] [2020-08-22 19:45:23,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:45:23,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:23,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:45:23,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:45:23,668 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 6 states. [2020-08-22 19:45:23,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:23,817 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-08-22 19:45:23,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 19:45:23,818 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-08-22 19:45:23,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:23,819 INFO L225 Difference]: With dead ends: 89 [2020-08-22 19:45:23,819 INFO L226 Difference]: Without dead ends: 65 [2020-08-22 19:45:23,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:45:23,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-08-22 19:45:23,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2020-08-22 19:45:23,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 19:45:23,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-08-22 19:45:23,828 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 41 [2020-08-22 19:45:23,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:23,828 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-08-22 19:45:23,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:45:23,829 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-08-22 19:45:23,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 19:45:23,830 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:23,830 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2020-08-22 19:45:23,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:45:23,831 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:23,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:23,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1372608588, now seen corresponding path program 2 times [2020-08-22 19:45:23,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:23,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661350254] [2020-08-22 19:45:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:23,845 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:23,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:23,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:23,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:23,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661350254] [2020-08-22 19:45:23,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:23,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:45:23,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201184846] [2020-08-22 19:45:23,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:45:23,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:23,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:45:23,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:45:23,996 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 8 states. [2020-08-22 19:45:24,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:24,231 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2020-08-22 19:45:24,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 19:45:24,231 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-08-22 19:45:24,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:24,233 INFO L225 Difference]: With dead ends: 107 [2020-08-22 19:45:24,233 INFO L226 Difference]: Without dead ends: 74 [2020-08-22 19:45:24,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-08-22 19:45:24,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-22 19:45:24,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-08-22 19:45:24,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 19:45:24,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-08-22 19:45:24,244 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 50 [2020-08-22 19:45:24,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:24,244 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-08-22 19:45:24,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:45:24,244 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-08-22 19:45:24,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 19:45:24,245 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:24,246 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:24,246 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:45:24,246 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:24,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:24,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1219437097, now seen corresponding path program 3 times [2020-08-22 19:45:24,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:24,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103120638] [2020-08-22 19:45:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:24,264 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:24,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:24,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103120638] [2020-08-22 19:45:24,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:24,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:45:24,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351603507] [2020-08-22 19:45:24,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:45:24,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:24,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:45:24,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:45:24,432 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 10 states. [2020-08-22 19:45:24,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:24,728 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2020-08-22 19:45:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 19:45:24,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-08-22 19:45:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:24,730 INFO L225 Difference]: With dead ends: 125 [2020-08-22 19:45:24,730 INFO L226 Difference]: Without dead ends: 83 [2020-08-22 19:45:24,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-08-22 19:45:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-08-22 19:45:24,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 69. [2020-08-22 19:45:24,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 19:45:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-08-22 19:45:24,746 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 59 [2020-08-22 19:45:24,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:24,749 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-08-22 19:45:24,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:45:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-08-22 19:45:24,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 19:45:24,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:24,751 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:24,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:45:24,752 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:24,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:24,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1194778388, now seen corresponding path program 4 times [2020-08-22 19:45:24,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:24,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142017447] [2020-08-22 19:45:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:24,787 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:24,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:24,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:24,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142017447] [2020-08-22 19:45:24,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:24,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:45:24,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708741797] [2020-08-22 19:45:24,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:45:24,998 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:24,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:45:24,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:45:24,999 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 12 states. [2020-08-22 19:45:25,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:25,400 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2020-08-22 19:45:25,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 19:45:25,401 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-08-22 19:45:25,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:25,404 INFO L225 Difference]: With dead ends: 143 [2020-08-22 19:45:25,404 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 19:45:25,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-08-22 19:45:25,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 19:45:25,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2020-08-22 19:45:25,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 19:45:25,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-08-22 19:45:25,425 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2020-08-22 19:45:25,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:25,426 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-08-22 19:45:25,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:45:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-08-22 19:45:25,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 19:45:25,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:25,428 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:25,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:45:25,429 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:25,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:25,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1191054729, now seen corresponding path program 5 times [2020-08-22 19:45:25,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:25,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798344877] [2020-08-22 19:45:25,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:25,473 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:25,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:25,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:25,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798344877] [2020-08-22 19:45:25,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:25,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:45:25,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092108728] [2020-08-22 19:45:25,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:45:25,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:25,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:45:25,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:45:25,770 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 14 states. [2020-08-22 19:45:26,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:26,222 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2020-08-22 19:45:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 19:45:26,222 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-08-22 19:45:26,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:26,224 INFO L225 Difference]: With dead ends: 161 [2020-08-22 19:45:26,224 INFO L226 Difference]: Without dead ends: 101 [2020-08-22 19:45:26,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-08-22 19:45:26,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-22 19:45:26,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2020-08-22 19:45:26,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 19:45:26,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-08-22 19:45:26,241 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 77 [2020-08-22 19:45:26,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:26,245 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-08-22 19:45:26,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:45:26,245 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-08-22 19:45:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 19:45:26,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:26,252 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:26,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 19:45:26,253 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:26,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:26,253 INFO L82 PathProgramCache]: Analyzing trace with hash 123928180, now seen corresponding path program 6 times [2020-08-22 19:45:26,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:26,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126414089] [2020-08-22 19:45:26,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:26,281 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:26,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:26,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:26,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:26,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126414089] [2020-08-22 19:45:26,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:26,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-22 19:45:26,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130179461] [2020-08-22 19:45:26,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 19:45:26,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:26,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 19:45:26,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-08-22 19:45:26,569 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 16 states. [2020-08-22 19:45:27,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:27,185 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2020-08-22 19:45:27,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 19:45:27,185 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-22 19:45:27,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:27,186 INFO L225 Difference]: With dead ends: 179 [2020-08-22 19:45:27,187 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 19:45:27,188 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2020-08-22 19:45:27,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 19:45:27,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-08-22 19:45:27,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 19:45:27,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-08-22 19:45:27,204 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 86 [2020-08-22 19:45:27,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:27,205 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-08-22 19:45:27,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 19:45:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-08-22 19:45:27,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-22 19:45:27,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:27,209 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:27,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 19:45:27,210 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:27,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:27,210 INFO L82 PathProgramCache]: Analyzing trace with hash -359457001, now seen corresponding path program 7 times [2020-08-22 19:45:27,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:27,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531284753] [2020-08-22 19:45:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:27,247 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:27,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:27,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:27,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531284753] [2020-08-22 19:45:27,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:27,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-22 19:45:27,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449995878] [2020-08-22 19:45:27,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 19:45:27,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:27,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 19:45:27,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-08-22 19:45:27,614 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 18 states. [2020-08-22 19:45:28,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:28,390 INFO L93 Difference]: Finished difference Result 197 states and 202 transitions. [2020-08-22 19:45:28,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 19:45:28,390 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-22 19:45:28,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:28,391 INFO L225 Difference]: With dead ends: 197 [2020-08-22 19:45:28,392 INFO L226 Difference]: Without dead ends: 119 [2020-08-22 19:45:28,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 19:45:28,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-08-22 19:45:28,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2020-08-22 19:45:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 19:45:28,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-08-22 19:45:28,403 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 95 [2020-08-22 19:45:28,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:28,403 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-08-22 19:45:28,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 19:45:28,404 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-08-22 19:45:28,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-22 19:45:28,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:28,405 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:28,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 19:45:28,406 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:28,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:28,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1447691732, now seen corresponding path program 8 times [2020-08-22 19:45:28,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:28,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953316849] [2020-08-22 19:45:28,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:28,447 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:28,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:28,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953316849] [2020-08-22 19:45:28,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:28,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-08-22 19:45:28,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619726288] [2020-08-22 19:45:28,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 19:45:28,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:28,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 19:45:28,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-08-22 19:45:28,799 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 20 states. [2020-08-22 19:45:29,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:29,760 INFO L93 Difference]: Finished difference Result 215 states and 220 transitions. [2020-08-22 19:45:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 19:45:29,760 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 104 [2020-08-22 19:45:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:29,761 INFO L225 Difference]: With dead ends: 215 [2020-08-22 19:45:29,762 INFO L226 Difference]: Without dead ends: 128 [2020-08-22 19:45:29,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=1202, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 19:45:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-08-22 19:45:29,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2020-08-22 19:45:29,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 19:45:29,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-08-22 19:45:29,779 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 104 [2020-08-22 19:45:29,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:29,779 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-08-22 19:45:29,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 19:45:29,780 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-08-22 19:45:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 19:45:29,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:29,781 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:29,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 19:45:29,781 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:29,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:29,783 INFO L82 PathProgramCache]: Analyzing trace with hash 221143991, now seen corresponding path program 9 times [2020-08-22 19:45:29,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:29,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554269940] [2020-08-22 19:45:29,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:29,827 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:30,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:30,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:30,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554269940] [2020-08-22 19:45:30,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:30,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-08-22 19:45:30,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44089494] [2020-08-22 19:45:30,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 19:45:30,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:30,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 19:45:30,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-08-22 19:45:30,283 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 22 states. [2020-08-22 19:45:31,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:31,323 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2020-08-22 19:45:31,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 19:45:31,324 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 113 [2020-08-22 19:45:31,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:31,325 INFO L225 Difference]: With dead ends: 233 [2020-08-22 19:45:31,325 INFO L226 Difference]: Without dead ends: 137 [2020-08-22 19:45:31,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=1495, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 19:45:31,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-22 19:45:31,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 123. [2020-08-22 19:45:31,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-22 19:45:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-08-22 19:45:31,334 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 113 [2020-08-22 19:45:31,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:31,334 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-08-22 19:45:31,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 19:45:31,335 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-08-22 19:45:31,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-22 19:45:31,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:31,336 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:31,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 19:45:31,336 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:31,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:31,337 INFO L82 PathProgramCache]: Analyzing trace with hash 570553652, now seen corresponding path program 10 times [2020-08-22 19:45:31,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:31,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498547268] [2020-08-22 19:45:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:31,370 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:31,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:31,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:31,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:31,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498547268] [2020-08-22 19:45:31,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:31,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-08-22 19:45:31,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112892767] [2020-08-22 19:45:31,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 19:45:31,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:31,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 19:45:31,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-08-22 19:45:31,863 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 24 states. [2020-08-22 19:45:33,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:33,118 INFO L93 Difference]: Finished difference Result 251 states and 256 transitions. [2020-08-22 19:45:33,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 19:45:33,122 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 122 [2020-08-22 19:45:33,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:33,123 INFO L225 Difference]: With dead ends: 251 [2020-08-22 19:45:33,123 INFO L226 Difference]: Without dead ends: 146 [2020-08-22 19:45:33,124 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 19:45:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-22 19:45:33,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2020-08-22 19:45:33,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 19:45:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-08-22 19:45:33,132 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 122 [2020-08-22 19:45:33,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:33,133 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-08-22 19:45:33,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 19:45:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-08-22 19:45:33,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 19:45:33,134 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:33,134 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:33,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 19:45:33,135 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:33,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:33,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1417822121, now seen corresponding path program 11 times [2020-08-22 19:45:33,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:33,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067786076] [2020-08-22 19:45:33,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:33,170 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:33,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:33,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067786076] [2020-08-22 19:45:33,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:33,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-08-22 19:45:33,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850474088] [2020-08-22 19:45:33,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 19:45:33,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:33,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 19:45:33,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-08-22 19:45:33,727 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 26 states. [2020-08-22 19:45:35,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:35,169 INFO L93 Difference]: Finished difference Result 269 states and 274 transitions. [2020-08-22 19:45:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 19:45:35,170 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 131 [2020-08-22 19:45:35,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:35,172 INFO L225 Difference]: With dead ends: 269 [2020-08-22 19:45:35,172 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 19:45:35,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=175, Invalid=2177, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 19:45:35,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 19:45:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2020-08-22 19:45:35,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-08-22 19:45:35,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-08-22 19:45:35,189 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 131 [2020-08-22 19:45:35,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:35,189 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-08-22 19:45:35,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 19:45:35,189 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-08-22 19:45:35,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-22 19:45:35,190 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:35,191 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:35,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 19:45:35,191 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:35,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:35,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1059114132, now seen corresponding path program 12 times [2020-08-22 19:45:35,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:35,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713729380] [2020-08-22 19:45:35,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:35,242 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:35,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:35,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:36,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713729380] [2020-08-22 19:45:36,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:36,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-08-22 19:45:36,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27087631] [2020-08-22 19:45:36,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 19:45:36,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:36,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 19:45:36,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-08-22 19:45:36,030 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 28 states. [2020-08-22 19:45:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:37,872 INFO L93 Difference]: Finished difference Result 287 states and 292 transitions. [2020-08-22 19:45:37,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 19:45:37,873 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 140 [2020-08-22 19:45:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:37,875 INFO L225 Difference]: With dead ends: 287 [2020-08-22 19:45:37,875 INFO L226 Difference]: Without dead ends: 164 [2020-08-22 19:45:37,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=190, Invalid=2566, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 19:45:37,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-08-22 19:45:37,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 150. [2020-08-22 19:45:37,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-22 19:45:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-08-22 19:45:37,885 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 140 [2020-08-22 19:45:37,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:37,885 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-08-22 19:45:37,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 19:45:37,885 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-08-22 19:45:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-08-22 19:45:37,887 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:37,887 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:37,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 19:45:37,887 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:37,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:37,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1179962121, now seen corresponding path program 13 times [2020-08-22 19:45:37,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:37,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078819215] [2020-08-22 19:45:37,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:37,951 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:38,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:38,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078819215] [2020-08-22 19:45:38,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:38,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-08-22 19:45:38,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668395848] [2020-08-22 19:45:38,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 19:45:38,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:38,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 19:45:38,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-08-22 19:45:38,657 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 30 states. [2020-08-22 19:45:40,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:40,576 INFO L93 Difference]: Finished difference Result 305 states and 310 transitions. [2020-08-22 19:45:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 19:45:40,577 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 149 [2020-08-22 19:45:40,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:40,578 INFO L225 Difference]: With dead ends: 305 [2020-08-22 19:45:40,578 INFO L226 Difference]: Without dead ends: 173 [2020-08-22 19:45:40,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=205, Invalid=2987, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 19:45:40,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-22 19:45:40,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 159. [2020-08-22 19:45:40,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-08-22 19:45:40,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2020-08-22 19:45:40,590 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 149 [2020-08-22 19:45:40,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:40,590 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2020-08-22 19:45:40,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 19:45:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2020-08-22 19:45:40,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-08-22 19:45:40,591 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:40,592 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:40,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 19:45:40,592 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:40,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:40,593 INFO L82 PathProgramCache]: Analyzing trace with hash -927167500, now seen corresponding path program 14 times [2020-08-22 19:45:40,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:40,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497501451] [2020-08-22 19:45:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:40,662 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:40,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:41,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:41,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497501451] [2020-08-22 19:45:41,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:41,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-08-22 19:45:41,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615659186] [2020-08-22 19:45:41,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 19:45:41,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:41,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 19:45:41,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-08-22 19:45:41,495 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 32 states. [2020-08-22 19:45:43,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:43,661 INFO L93 Difference]: Finished difference Result 323 states and 328 transitions. [2020-08-22 19:45:43,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 19:45:43,665 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 158 [2020-08-22 19:45:43,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:43,666 INFO L225 Difference]: With dead ends: 323 [2020-08-22 19:45:43,666 INFO L226 Difference]: Without dead ends: 182 [2020-08-22 19:45:43,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=220, Invalid=3440, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 19:45:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-08-22 19:45:43,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 168. [2020-08-22 19:45:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 19:45:43,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2020-08-22 19:45:43,680 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 158 [2020-08-22 19:45:43,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:43,681 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2020-08-22 19:45:43,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 19:45:43,681 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2020-08-22 19:45:43,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-08-22 19:45:43,683 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:43,683 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:43,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 19:45:43,685 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:43,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:43,685 INFO L82 PathProgramCache]: Analyzing trace with hash 895533463, now seen corresponding path program 15 times [2020-08-22 19:45:43,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:43,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187313041] [2020-08-22 19:45:43,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:43,747 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:44,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:44,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:44,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187313041] [2020-08-22 19:45:44,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:44,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-08-22 19:45:44,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021776322] [2020-08-22 19:45:44,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 19:45:44,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:44,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 19:45:44,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 19:45:44,635 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 34 states. [2020-08-22 19:45:47,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:47,099 INFO L93 Difference]: Finished difference Result 341 states and 346 transitions. [2020-08-22 19:45:47,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-08-22 19:45:47,100 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 167 [2020-08-22 19:45:47,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:47,102 INFO L225 Difference]: With dead ends: 341 [2020-08-22 19:45:47,102 INFO L226 Difference]: Without dead ends: 191 [2020-08-22 19:45:47,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=235, Invalid=3925, Unknown=0, NotChecked=0, Total=4160 [2020-08-22 19:45:47,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-08-22 19:45:47,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 177. [2020-08-22 19:45:47,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-22 19:45:47,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2020-08-22 19:45:47,114 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 167 [2020-08-22 19:45:47,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:47,115 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2020-08-22 19:45:47,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 19:45:47,115 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2020-08-22 19:45:47,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-08-22 19:45:47,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:47,117 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:47,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 19:45:47,117 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:47,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:47,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2140458156, now seen corresponding path program 16 times [2020-08-22 19:45:47,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:47,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667330554] [2020-08-22 19:45:47,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:47,169 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:48,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:48,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667330554] [2020-08-22 19:45:48,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:48,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-08-22 19:45:48,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106575990] [2020-08-22 19:45:48,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 19:45:48,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:48,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 19:45:48,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 19:45:48,179 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 36 states. [2020-08-22 19:45:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:50,911 INFO L93 Difference]: Finished difference Result 359 states and 364 transitions. [2020-08-22 19:45:50,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-22 19:45:50,916 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 176 [2020-08-22 19:45:50,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:50,917 INFO L225 Difference]: With dead ends: 359 [2020-08-22 19:45:50,918 INFO L226 Difference]: Without dead ends: 200 [2020-08-22 19:45:50,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=250, Invalid=4442, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 19:45:50,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-08-22 19:45:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 186. [2020-08-22 19:45:50,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 19:45:50,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2020-08-22 19:45:50,940 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 176 [2020-08-22 19:45:50,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:50,940 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2020-08-22 19:45:50,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 19:45:50,940 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2020-08-22 19:45:50,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-08-22 19:45:50,943 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:50,943 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:50,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 19:45:50,944 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:50,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:50,945 INFO L82 PathProgramCache]: Analyzing trace with hash -976722377, now seen corresponding path program 17 times [2020-08-22 19:45:50,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:50,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438790218] [2020-08-22 19:45:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:51,037 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:52,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:52,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:52,120 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438790218] [2020-08-22 19:45:52,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:52,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-08-22 19:45:52,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241176342] [2020-08-22 19:45:52,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 19:45:52,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:52,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 19:45:52,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 19:45:52,122 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 38 states. [2020-08-22 19:45:55,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:55,085 INFO L93 Difference]: Finished difference Result 377 states and 382 transitions. [2020-08-22 19:45:55,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-08-22 19:45:55,085 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 185 [2020-08-22 19:45:55,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:55,087 INFO L225 Difference]: With dead ends: 377 [2020-08-22 19:45:55,087 INFO L226 Difference]: Without dead ends: 209 [2020-08-22 19:45:55,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=265, Invalid=4991, Unknown=0, NotChecked=0, Total=5256 [2020-08-22 19:45:55,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-08-22 19:45:55,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 195. [2020-08-22 19:45:55,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-08-22 19:45:55,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2020-08-22 19:45:55,099 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 185 [2020-08-22 19:45:55,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:55,100 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2020-08-22 19:45:55,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 19:45:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2020-08-22 19:45:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-08-22 19:45:55,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:55,102 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:55,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 19:45:55,102 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:55,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:55,103 INFO L82 PathProgramCache]: Analyzing trace with hash 776127156, now seen corresponding path program 18 times [2020-08-22 19:45:55,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:55,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394271356] [2020-08-22 19:45:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:55,177 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:56,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:56,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:45:56,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394271356] [2020-08-22 19:45:56,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:56,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-08-22 19:45:56,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538122633] [2020-08-22 19:45:56,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 19:45:56,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:56,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 19:45:56,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 19:45:56,412 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 40 states. [2020-08-22 19:45:59,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:59,811 INFO L93 Difference]: Finished difference Result 395 states and 400 transitions. [2020-08-22 19:45:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-08-22 19:45:59,814 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 194 [2020-08-22 19:45:59,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:59,816 INFO L225 Difference]: With dead ends: 395 [2020-08-22 19:45:59,816 INFO L226 Difference]: Without dead ends: 218 [2020-08-22 19:45:59,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=280, Invalid=5572, Unknown=0, NotChecked=0, Total=5852 [2020-08-22 19:45:59,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-08-22 19:45:59,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 204. [2020-08-22 19:45:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 19:45:59,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2020-08-22 19:45:59,832 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 194 [2020-08-22 19:45:59,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:59,832 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2020-08-22 19:45:59,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 19:45:59,833 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2020-08-22 19:45:59,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-08-22 19:45:59,834 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:59,834 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:59,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 19:45:59,835 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:59,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:59,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1535910615, now seen corresponding path program 19 times [2020-08-22 19:45:59,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:59,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789278210] [2020-08-22 19:45:59,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:59,913 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:01,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:01,271 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789278210] [2020-08-22 19:46:01,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:01,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-08-22 19:46:01,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490331432] [2020-08-22 19:46:01,272 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 19:46:01,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:01,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 19:46:01,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1622, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 19:46:01,274 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand 42 states. [2020-08-22 19:46:05,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:05,010 INFO L93 Difference]: Finished difference Result 413 states and 418 transitions. [2020-08-22 19:46:05,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-08-22 19:46:05,011 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 203 [2020-08-22 19:46:05,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:05,012 INFO L225 Difference]: With dead ends: 413 [2020-08-22 19:46:05,013 INFO L226 Difference]: Without dead ends: 227 [2020-08-22 19:46:05,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=295, Invalid=6185, Unknown=0, NotChecked=0, Total=6480 [2020-08-22 19:46:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-08-22 19:46:05,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 213. [2020-08-22 19:46:05,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-08-22 19:46:05,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2020-08-22 19:46:05,026 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 203 [2020-08-22 19:46:05,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:05,026 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2020-08-22 19:46:05,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 19:46:05,026 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2020-08-22 19:46:05,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-08-22 19:46:05,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:05,028 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:05,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 19:46:05,028 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:05,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash 14236180, now seen corresponding path program 20 times [2020-08-22 19:46:05,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:05,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137601526] [2020-08-22 19:46:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:05,195 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:06,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:06,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137601526] [2020-08-22 19:46:06,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:06,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-08-22 19:46:06,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305796096] [2020-08-22 19:46:06,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 19:46:06,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:06,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 19:46:06,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 19:46:06,636 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand 44 states. [2020-08-22 19:46:10,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:10,693 INFO L93 Difference]: Finished difference Result 431 states and 436 transitions. [2020-08-22 19:46:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-08-22 19:46:10,693 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 212 [2020-08-22 19:46:10,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:10,694 INFO L225 Difference]: With dead ends: 431 [2020-08-22 19:46:10,694 INFO L226 Difference]: Without dead ends: 236 [2020-08-22 19:46:10,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=310, Invalid=6830, Unknown=0, NotChecked=0, Total=7140 [2020-08-22 19:46:10,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-22 19:46:10,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 222. [2020-08-22 19:46:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-08-22 19:46:10,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 224 transitions. [2020-08-22 19:46:10,707 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 224 transitions. Word has length 212 [2020-08-22 19:46:10,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:10,707 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 224 transitions. [2020-08-22 19:46:10,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 19:46:10,707 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 224 transitions. [2020-08-22 19:46:10,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-08-22 19:46:10,708 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:10,709 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:10,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 19:46:10,709 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:10,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:10,709 INFO L82 PathProgramCache]: Analyzing trace with hash -791283849, now seen corresponding path program 21 times [2020-08-22 19:46:10,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:10,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904069882] [2020-08-22 19:46:10,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:10,800 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:10,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:12,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:12,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904069882] [2020-08-22 19:46:12,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:12,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-08-22 19:46:12,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039051938] [2020-08-22 19:46:12,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 19:46:12,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:12,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 19:46:12,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1960, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 19:46:12,332 INFO L87 Difference]: Start difference. First operand 222 states and 224 transitions. Second operand 46 states. [2020-08-22 19:46:16,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:16,912 INFO L93 Difference]: Finished difference Result 449 states and 454 transitions. [2020-08-22 19:46:16,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-08-22 19:46:16,913 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 221 [2020-08-22 19:46:16,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:16,914 INFO L225 Difference]: With dead ends: 449 [2020-08-22 19:46:16,914 INFO L226 Difference]: Without dead ends: 245 [2020-08-22 19:46:16,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=325, Invalid=7507, Unknown=0, NotChecked=0, Total=7832 [2020-08-22 19:46:16,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-08-22 19:46:16,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 231. [2020-08-22 19:46:16,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-08-22 19:46:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2020-08-22 19:46:16,923 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 221 [2020-08-22 19:46:16,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:16,924 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2020-08-22 19:46:16,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 19:46:16,924 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2020-08-22 19:46:16,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-08-22 19:46:16,925 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:16,925 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:16,925 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 19:46:16,925 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:16,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:16,925 INFO L82 PathProgramCache]: Analyzing trace with hash -314271372, now seen corresponding path program 22 times [2020-08-22 19:46:16,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:16,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902201237] [2020-08-22 19:46:16,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:17,007 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:18,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:18,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902201237] [2020-08-22 19:46:18,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:18,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-08-22 19:46:18,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777286946] [2020-08-22 19:46:18,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 19:46:18,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:18,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 19:46:18,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 19:46:18,826 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 48 states. [2020-08-22 19:46:23,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:23,686 INFO L93 Difference]: Finished difference Result 467 states and 472 transitions. [2020-08-22 19:46:23,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-08-22 19:46:23,687 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 230 [2020-08-22 19:46:23,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:23,689 INFO L225 Difference]: With dead ends: 467 [2020-08-22 19:46:23,689 INFO L226 Difference]: Without dead ends: 254 [2020-08-22 19:46:23,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=340, Invalid=8216, Unknown=0, NotChecked=0, Total=8556 [2020-08-22 19:46:23,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-08-22 19:46:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 240. [2020-08-22 19:46:23,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-22 19:46:23,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2020-08-22 19:46:23,701 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 230 [2020-08-22 19:46:23,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:23,702 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2020-08-22 19:46:23,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 19:46:23,702 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2020-08-22 19:46:23,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-08-22 19:46:23,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:23,703 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:23,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 19:46:23,704 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:23,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:23,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1991252969, now seen corresponding path program 23 times [2020-08-22 19:46:23,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:23,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051217442] [2020-08-22 19:46:23,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:23,820 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:23,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:25,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:25,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:25,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:25,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051217442] [2020-08-22 19:46:25,890 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:25,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-08-22 19:46:25,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707797663] [2020-08-22 19:46:25,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-22 19:46:25,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:25,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-22 19:46:25,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 19:46:25,892 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand 50 states. [2020-08-22 19:46:31,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:31,221 INFO L93 Difference]: Finished difference Result 485 states and 490 transitions. [2020-08-22 19:46:31,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-08-22 19:46:31,223 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 239 [2020-08-22 19:46:31,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:31,224 INFO L225 Difference]: With dead ends: 485 [2020-08-22 19:46:31,225 INFO L226 Difference]: Without dead ends: 263 [2020-08-22 19:46:31,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=355, Invalid=8957, Unknown=0, NotChecked=0, Total=9312 [2020-08-22 19:46:31,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-08-22 19:46:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 249. [2020-08-22 19:46:31,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-08-22 19:46:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 251 transitions. [2020-08-22 19:46:31,235 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 251 transitions. Word has length 239 [2020-08-22 19:46:31,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:31,235 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 251 transitions. [2020-08-22 19:46:31,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-22 19:46:31,235 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 251 transitions. [2020-08-22 19:46:31,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-08-22 19:46:31,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:31,237 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:31,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 19:46:31,237 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:31,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:31,238 INFO L82 PathProgramCache]: Analyzing trace with hash 253419732, now seen corresponding path program 24 times [2020-08-22 19:46:31,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:31,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1056717097] [2020-08-22 19:46:31,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:31,357 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:33,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:33,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:33,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1056717097] [2020-08-22 19:46:33,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:33,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-08-22 19:46:33,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358965548] [2020-08-22 19:46:33,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-22 19:46:33,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:33,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-22 19:46:33,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 19:46:33,423 INFO L87 Difference]: Start difference. First operand 249 states and 251 transitions. Second operand 52 states. [2020-08-22 19:46:39,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:39,241 INFO L93 Difference]: Finished difference Result 503 states and 508 transitions. [2020-08-22 19:46:39,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-08-22 19:46:39,241 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 248 [2020-08-22 19:46:39,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:39,243 INFO L225 Difference]: With dead ends: 503 [2020-08-22 19:46:39,243 INFO L226 Difference]: Without dead ends: 272 [2020-08-22 19:46:39,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=370, Invalid=9730, Unknown=0, NotChecked=0, Total=10100 [2020-08-22 19:46:39,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-08-22 19:46:39,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 258. [2020-08-22 19:46:39,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-08-22 19:46:39,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 260 transitions. [2020-08-22 19:46:39,256 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 260 transitions. Word has length 248 [2020-08-22 19:46:39,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:39,257 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 260 transitions. [2020-08-22 19:46:39,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-22 19:46:39,257 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 260 transitions. [2020-08-22 19:46:39,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-08-22 19:46:39,259 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:39,259 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:39,259 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 19:46:39,259 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:39,259 INFO L82 PathProgramCache]: Analyzing trace with hash 304343223, now seen corresponding path program 25 times [2020-08-22 19:46:39,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:39,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026195827] [2020-08-22 19:46:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:39,684 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:39,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:41,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:42,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:42,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026195827] [2020-08-22 19:46:42,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:42,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-08-22 19:46:42,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888806352] [2020-08-22 19:46:42,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-08-22 19:46:42,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:42,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-08-22 19:46:42,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2732, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 19:46:42,029 INFO L87 Difference]: Start difference. First operand 258 states and 260 transitions. Second operand 54 states. [2020-08-22 19:46:48,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:48,125 INFO L93 Difference]: Finished difference Result 521 states and 526 transitions. [2020-08-22 19:46:48,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-08-22 19:46:48,131 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 257 [2020-08-22 19:46:48,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:48,133 INFO L225 Difference]: With dead ends: 521 [2020-08-22 19:46:48,133 INFO L226 Difference]: Without dead ends: 281 [2020-08-22 19:46:48,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=385, Invalid=10535, Unknown=0, NotChecked=0, Total=10920 [2020-08-22 19:46:48,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-08-22 19:46:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 267. [2020-08-22 19:46:48,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-08-22 19:46:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 269 transitions. [2020-08-22 19:46:48,144 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 269 transitions. Word has length 257 [2020-08-22 19:46:48,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:48,145 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 269 transitions. [2020-08-22 19:46:48,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-08-22 19:46:48,145 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 269 transitions. [2020-08-22 19:46:48,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-08-22 19:46:48,147 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:48,147 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:48,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 19:46:48,147 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:48,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:48,148 INFO L82 PathProgramCache]: Analyzing trace with hash 141692980, now seen corresponding path program 26 times [2020-08-22 19:46:48,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:48,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348150604] [2020-08-22 19:46:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:48,341 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:50,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:46:50,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:46:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:46:50,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348150604] [2020-08-22 19:46:50,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:50,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-08-22 19:46:50,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869436186] [2020-08-22 19:46:50,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-08-22 19:46:50,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:50,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-08-22 19:46:50,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2945, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 19:46:50,888 INFO L87 Difference]: Start difference. First operand 267 states and 269 transitions. Second operand 56 states. [2020-08-22 19:46:57,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:57,587 INFO L93 Difference]: Finished difference Result 539 states and 544 transitions. [2020-08-22 19:46:57,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-08-22 19:46:57,588 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 266 [2020-08-22 19:46:57,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:57,589 INFO L225 Difference]: With dead ends: 539 [2020-08-22 19:46:57,590 INFO L226 Difference]: Without dead ends: 290 [2020-08-22 19:46:57,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=400, Invalid=11372, Unknown=0, NotChecked=0, Total=11772 [2020-08-22 19:46:57,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-08-22 19:46:57,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 276. [2020-08-22 19:46:57,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-08-22 19:46:57,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 278 transitions. [2020-08-22 19:46:57,603 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 278 transitions. Word has length 266 [2020-08-22 19:46:57,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:57,603 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 278 transitions. [2020-08-22 19:46:57,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-08-22 19:46:57,603 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 278 transitions. [2020-08-22 19:46:57,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-08-22 19:46:57,605 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:57,605 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:57,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 19:46:57,606 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:57,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:57,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1040448169, now seen corresponding path program 27 times [2020-08-22 19:46:57,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:57,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889894602] [2020-08-22 19:46:57,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:57,728 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:46:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:00,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:00,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:00,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889894602] [2020-08-22 19:47:00,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:00,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2020-08-22 19:47:00,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899634059] [2020-08-22 19:47:00,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-08-22 19:47:00,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:00,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-08-22 19:47:00,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=3166, Unknown=0, NotChecked=0, Total=3306 [2020-08-22 19:47:00,348 INFO L87 Difference]: Start difference. First operand 276 states and 278 transitions. Second operand 58 states. [2020-08-22 19:47:07,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:07,536 INFO L93 Difference]: Finished difference Result 557 states and 562 transitions. [2020-08-22 19:47:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-08-22 19:47:07,537 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 275 [2020-08-22 19:47:07,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:07,538 INFO L225 Difference]: With dead ends: 557 [2020-08-22 19:47:07,538 INFO L226 Difference]: Without dead ends: 299 [2020-08-22 19:47:07,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=415, Invalid=12241, Unknown=0, NotChecked=0, Total=12656 [2020-08-22 19:47:07,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-08-22 19:47:07,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 285. [2020-08-22 19:47:07,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-08-22 19:47:07,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 287 transitions. [2020-08-22 19:47:07,549 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 287 transitions. Word has length 275 [2020-08-22 19:47:07,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:07,549 INFO L479 AbstractCegarLoop]: Abstraction has 285 states and 287 transitions. [2020-08-22 19:47:07,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-08-22 19:47:07,549 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 287 transitions. [2020-08-22 19:47:07,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-08-22 19:47:07,550 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:07,551 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:07,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 19:47:07,551 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:07,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:07,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1642080148, now seen corresponding path program 28 times [2020-08-22 19:47:07,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:07,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768251038] [2020-08-22 19:47:07,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:07,653 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:07,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:10,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:10,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768251038] [2020-08-22 19:47:10,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:10,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-08-22 19:47:10,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315173667] [2020-08-22 19:47:10,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-08-22 19:47:10,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:10,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-08-22 19:47:10,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 19:47:10,551 INFO L87 Difference]: Start difference. First operand 285 states and 287 transitions. Second operand 60 states. [2020-08-22 19:47:18,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:18,190 INFO L93 Difference]: Finished difference Result 575 states and 580 transitions. [2020-08-22 19:47:18,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-08-22 19:47:18,191 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 284 [2020-08-22 19:47:18,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:18,193 INFO L225 Difference]: With dead ends: 575 [2020-08-22 19:47:18,193 INFO L226 Difference]: Without dead ends: 308 [2020-08-22 19:47:18,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=430, Invalid=13142, Unknown=0, NotChecked=0, Total=13572 [2020-08-22 19:47:18,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-08-22 19:47:18,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 294. [2020-08-22 19:47:18,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-08-22 19:47:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 296 transitions. [2020-08-22 19:47:18,207 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 296 transitions. Word has length 284 [2020-08-22 19:47:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:18,207 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 296 transitions. [2020-08-22 19:47:18,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-08-22 19:47:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 296 transitions. [2020-08-22 19:47:18,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-08-22 19:47:18,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:18,209 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:18,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 19:47:18,210 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:18,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:18,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1493318135, now seen corresponding path program 29 times [2020-08-22 19:47:18,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:18,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011033606] [2020-08-22 19:47:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:18,406 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:21,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:21,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011033606] [2020-08-22 19:47:21,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:21,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2020-08-22 19:47:21,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637112524] [2020-08-22 19:47:21,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-08-22 19:47:21,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:21,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-08-22 19:47:21,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3632, Unknown=0, NotChecked=0, Total=3782 [2020-08-22 19:47:21,519 INFO L87 Difference]: Start difference. First operand 294 states and 296 transitions. Second operand 62 states. [2020-08-22 19:47:29,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:29,659 INFO L93 Difference]: Finished difference Result 593 states and 598 transitions. [2020-08-22 19:47:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-08-22 19:47:29,659 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 293 [2020-08-22 19:47:29,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:29,661 INFO L225 Difference]: With dead ends: 593 [2020-08-22 19:47:29,661 INFO L226 Difference]: Without dead ends: 317 [2020-08-22 19:47:29,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=445, Invalid=14075, Unknown=0, NotChecked=0, Total=14520 [2020-08-22 19:47:29,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-08-22 19:47:29,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 303. [2020-08-22 19:47:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-08-22 19:47:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 305 transitions. [2020-08-22 19:47:29,676 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 305 transitions. Word has length 293 [2020-08-22 19:47:29,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:29,676 INFO L479 AbstractCegarLoop]: Abstraction has 303 states and 305 transitions. [2020-08-22 19:47:29,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-08-22 19:47:29,676 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 305 transitions. [2020-08-22 19:47:29,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-08-22 19:47:29,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:29,678 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:29,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 19:47:29,678 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:29,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:29,679 INFO L82 PathProgramCache]: Analyzing trace with hash -361027852, now seen corresponding path program 30 times [2020-08-22 19:47:29,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:29,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599956275] [2020-08-22 19:47:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:29,868 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:33,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:33,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:33,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599956275] [2020-08-22 19:47:33,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:33,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-08-22 19:47:33,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957239933] [2020-08-22 19:47:33,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-08-22 19:47:33,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:33,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-08-22 19:47:33,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3877, Unknown=0, NotChecked=0, Total=4032 [2020-08-22 19:47:33,250 INFO L87 Difference]: Start difference. First operand 303 states and 305 transitions. Second operand 64 states. [2020-08-22 19:47:41,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:41,902 INFO L93 Difference]: Finished difference Result 611 states and 616 transitions. [2020-08-22 19:47:41,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-08-22 19:47:41,903 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 302 [2020-08-22 19:47:41,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:41,904 INFO L225 Difference]: With dead ends: 611 [2020-08-22 19:47:41,904 INFO L226 Difference]: Without dead ends: 326 [2020-08-22 19:47:41,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=460, Invalid=15040, Unknown=0, NotChecked=0, Total=15500 [2020-08-22 19:47:41,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-08-22 19:47:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 312. [2020-08-22 19:47:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-08-22 19:47:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 314 transitions. [2020-08-22 19:47:41,917 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 314 transitions. Word has length 302 [2020-08-22 19:47:41,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:41,917 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 314 transitions. [2020-08-22 19:47:41,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-08-22 19:47:41,917 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 314 transitions. [2020-08-22 19:47:41,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-08-22 19:47:41,919 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:41,919 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:41,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 19:47:41,920 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:41,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1595898217, now seen corresponding path program 31 times [2020-08-22 19:47:41,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:41,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691605653] [2020-08-22 19:47:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:42,158 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:42,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:45,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:45,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691605653] [2020-08-22 19:47:45,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:45,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2020-08-22 19:47:45,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610929559] [2020-08-22 19:47:45,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-08-22 19:47:45,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:45,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-08-22 19:47:45,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=4130, Unknown=0, NotChecked=0, Total=4290 [2020-08-22 19:47:45,811 INFO L87 Difference]: Start difference. First operand 312 states and 314 transitions. Second operand 66 states. [2020-08-22 19:47:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:55,099 INFO L93 Difference]: Finished difference Result 629 states and 634 transitions. [2020-08-22 19:47:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-08-22 19:47:55,100 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 311 [2020-08-22 19:47:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:55,101 INFO L225 Difference]: With dead ends: 629 [2020-08-22 19:47:55,101 INFO L226 Difference]: Without dead ends: 335 [2020-08-22 19:47:55,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=475, Invalid=16037, Unknown=0, NotChecked=0, Total=16512 [2020-08-22 19:47:55,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-08-22 19:47:55,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 321. [2020-08-22 19:47:55,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-08-22 19:47:55,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 323 transitions. [2020-08-22 19:47:55,116 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 323 transitions. Word has length 311 [2020-08-22 19:47:55,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:55,116 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 323 transitions. [2020-08-22 19:47:55,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-08-22 19:47:55,116 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 323 transitions. [2020-08-22 19:47:55,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-08-22 19:47:55,118 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:55,118 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:55,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 19:47:55,119 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:55,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:55,119 INFO L82 PathProgramCache]: Analyzing trace with hash 400100948, now seen corresponding path program 32 times [2020-08-22 19:47:55,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:55,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100547724] [2020-08-22 19:47:55,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:55,356 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:55,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:59,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:59,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100547724] [2020-08-22 19:47:59,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:59,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2020-08-22 19:47:59,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973335859] [2020-08-22 19:47:59,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-08-22 19:47:59,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:59,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-08-22 19:47:59,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=4391, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 19:47:59,320 INFO L87 Difference]: Start difference. First operand 321 states and 323 transitions. Second operand 68 states. [2020-08-22 19:48:09,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:09,088 INFO L93 Difference]: Finished difference Result 647 states and 652 transitions. [2020-08-22 19:48:09,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-08-22 19:48:09,089 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 320 [2020-08-22 19:48:09,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:09,091 INFO L225 Difference]: With dead ends: 647 [2020-08-22 19:48:09,092 INFO L226 Difference]: Without dead ends: 344 [2020-08-22 19:48:09,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=490, Invalid=17066, Unknown=0, NotChecked=0, Total=17556 [2020-08-22 19:48:09,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-08-22 19:48:09,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 330. [2020-08-22 19:48:09,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-08-22 19:48:09,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 332 transitions. [2020-08-22 19:48:09,106 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 332 transitions. Word has length 320 [2020-08-22 19:48:09,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:09,107 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 332 transitions. [2020-08-22 19:48:09,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-08-22 19:48:09,107 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 332 transitions. [2020-08-22 19:48:09,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-08-22 19:48:09,109 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:09,109 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:09,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 19:48:09,109 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:09,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:09,110 INFO L82 PathProgramCache]: Analyzing trace with hash 213969719, now seen corresponding path program 33 times [2020-08-22 19:48:09,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:09,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881415272] [2020-08-22 19:48:09,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:09,351 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:13,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:13,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881415272] [2020-08-22 19:48:13,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:13,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2020-08-22 19:48:13,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361825156] [2020-08-22 19:48:13,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-08-22 19:48:13,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:13,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-08-22 19:48:13,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=4660, Unknown=0, NotChecked=0, Total=4830 [2020-08-22 19:48:13,576 INFO L87 Difference]: Start difference. First operand 330 states and 332 transitions. Second operand 70 states. [2020-08-22 19:48:24,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:24,012 INFO L93 Difference]: Finished difference Result 665 states and 670 transitions. [2020-08-22 19:48:24,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-08-22 19:48:24,013 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 329 [2020-08-22 19:48:24,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:24,014 INFO L225 Difference]: With dead ends: 665 [2020-08-22 19:48:24,014 INFO L226 Difference]: Without dead ends: 353 [2020-08-22 19:48:24,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=505, Invalid=18127, Unknown=0, NotChecked=0, Total=18632 [2020-08-22 19:48:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-08-22 19:48:24,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 339. [2020-08-22 19:48:24,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-08-22 19:48:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 341 transitions. [2020-08-22 19:48:24,045 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 341 transitions. Word has length 329 [2020-08-22 19:48:24,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:24,046 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 341 transitions. [2020-08-22 19:48:24,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-08-22 19:48:24,046 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 341 transitions. [2020-08-22 19:48:24,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-08-22 19:48:24,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:24,048 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:24,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 19:48:24,049 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:24,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:24,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1712315828, now seen corresponding path program 34 times [2020-08-22 19:48:24,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:24,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581833675] [2020-08-22 19:48:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:24,207 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:28,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:28,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581833675] [2020-08-22 19:48:28,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:28,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2020-08-22 19:48:28,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985853305] [2020-08-22 19:48:28,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-08-22 19:48:28,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:28,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-08-22 19:48:28,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4937, Unknown=0, NotChecked=0, Total=5112 [2020-08-22 19:48:28,794 INFO L87 Difference]: Start difference. First operand 339 states and 341 transitions. Second operand 72 states. [2020-08-22 19:48:40,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:40,275 INFO L93 Difference]: Finished difference Result 683 states and 688 transitions. [2020-08-22 19:48:40,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-08-22 19:48:40,276 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 338 [2020-08-22 19:48:40,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:40,277 INFO L225 Difference]: With dead ends: 683 [2020-08-22 19:48:40,278 INFO L226 Difference]: Without dead ends: 362 [2020-08-22 19:48:40,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=520, Invalid=19220, Unknown=0, NotChecked=0, Total=19740 [2020-08-22 19:48:40,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-22 19:48:40,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 348. [2020-08-22 19:48:40,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-08-22 19:48:40,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 350 transitions. [2020-08-22 19:48:40,293 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 350 transitions. Word has length 338 [2020-08-22 19:48:40,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:40,294 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 350 transitions. [2020-08-22 19:48:40,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-08-22 19:48:40,294 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 350 transitions. [2020-08-22 19:48:40,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-08-22 19:48:40,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:40,296 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:40,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 19:48:40,296 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:40,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:40,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1498245079, now seen corresponding path program 35 times [2020-08-22 19:48:40,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:40,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127396320] [2020-08-22 19:48:40,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:40,743 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:40,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:45,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:45,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127396320] [2020-08-22 19:48:45,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:45,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2020-08-22 19:48:45,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045075889] [2020-08-22 19:48:45,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-08-22 19:48:45,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:45,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-08-22 19:48:45,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=5222, Unknown=0, NotChecked=0, Total=5402 [2020-08-22 19:48:45,598 INFO L87 Difference]: Start difference. First operand 348 states and 350 transitions. Second operand 74 states. [2020-08-22 19:48:57,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:57,885 INFO L93 Difference]: Finished difference Result 701 states and 706 transitions. [2020-08-22 19:48:57,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2020-08-22 19:48:57,886 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 347 [2020-08-22 19:48:57,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:57,888 INFO L225 Difference]: With dead ends: 701 [2020-08-22 19:48:57,888 INFO L226 Difference]: Without dead ends: 371 [2020-08-22 19:48:57,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=535, Invalid=20345, Unknown=0, NotChecked=0, Total=20880 [2020-08-22 19:48:57,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-08-22 19:48:57,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 357. [2020-08-22 19:48:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-08-22 19:48:57,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 359 transitions. [2020-08-22 19:48:57,903 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 359 transitions. Word has length 347 [2020-08-22 19:48:57,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:57,904 INFO L479 AbstractCegarLoop]: Abstraction has 357 states and 359 transitions. [2020-08-22 19:48:57,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-08-22 19:48:57,904 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 359 transitions. [2020-08-22 19:48:57,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2020-08-22 19:48:57,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:57,906 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:48:57,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 19:48:57,906 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:57,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:57,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1212836588, now seen corresponding path program 36 times [2020-08-22 19:48:57,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:57,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682924491] [2020-08-22 19:48:57,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:58,043 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:58,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:03,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:03,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:03,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:03,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682924491] [2020-08-22 19:49:03,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:03,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2020-08-22 19:49:03,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203671177] [2020-08-22 19:49:03,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-08-22 19:49:03,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:03,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-08-22 19:49:03,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=5515, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 19:49:03,328 INFO L87 Difference]: Start difference. First operand 357 states and 359 transitions. Second operand 76 states. [2020-08-22 19:49:16,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:16,793 INFO L93 Difference]: Finished difference Result 719 states and 724 transitions. [2020-08-22 19:49:16,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-08-22 19:49:16,793 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 356 [2020-08-22 19:49:16,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:16,795 INFO L225 Difference]: With dead ends: 719 [2020-08-22 19:49:16,795 INFO L226 Difference]: Without dead ends: 380 [2020-08-22 19:49:16,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=550, Invalid=21502, Unknown=0, NotChecked=0, Total=22052 [2020-08-22 19:49:16,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-22 19:49:16,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 366. [2020-08-22 19:49:16,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-08-22 19:49:16,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 368 transitions. [2020-08-22 19:49:16,812 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 368 transitions. Word has length 356 [2020-08-22 19:49:16,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:16,813 INFO L479 AbstractCegarLoop]: Abstraction has 366 states and 368 transitions. [2020-08-22 19:49:16,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-08-22 19:49:16,813 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 368 transitions. [2020-08-22 19:49:16,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-08-22 19:49:16,815 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:16,815 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:49:16,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 19:49:16,815 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:16,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:16,816 INFO L82 PathProgramCache]: Analyzing trace with hash 749730935, now seen corresponding path program 37 times [2020-08-22 19:49:16,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:16,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [248098166] [2020-08-22 19:49:16,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:17,022 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:17,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:22,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:22,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:22,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [248098166] [2020-08-22 19:49:22,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:22,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2020-08-22 19:49:22,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957852496] [2020-08-22 19:49:22,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-08-22 19:49:22,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:22,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-08-22 19:49:22,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5816, Unknown=0, NotChecked=0, Total=6006 [2020-08-22 19:49:22,735 INFO L87 Difference]: Start difference. First operand 366 states and 368 transitions. Second operand 78 states. [2020-08-22 19:49:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:37,235 INFO L93 Difference]: Finished difference Result 737 states and 742 transitions. [2020-08-22 19:49:37,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2020-08-22 19:49:37,236 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 365 [2020-08-22 19:49:37,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:37,238 INFO L225 Difference]: With dead ends: 737 [2020-08-22 19:49:37,238 INFO L226 Difference]: Without dead ends: 389 [2020-08-22 19:49:37,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=565, Invalid=22691, Unknown=0, NotChecked=0, Total=23256 [2020-08-22 19:49:37,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-08-22 19:49:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 375. [2020-08-22 19:49:37,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-08-22 19:49:37,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 377 transitions. [2020-08-22 19:49:37,255 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 377 transitions. Word has length 365 [2020-08-22 19:49:37,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:37,255 INFO L479 AbstractCegarLoop]: Abstraction has 375 states and 377 transitions. [2020-08-22 19:49:37,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-08-22 19:49:37,255 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 377 transitions. [2020-08-22 19:49:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-08-22 19:49:37,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:37,258 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:49:37,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 19:49:37,258 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:37,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:37,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1243597708, now seen corresponding path program 38 times [2020-08-22 19:49:37,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:37,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510379733] [2020-08-22 19:49:37,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:37,546 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:43,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:43,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510379733] [2020-08-22 19:49:43,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:43,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2020-08-22 19:49:43,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949395845] [2020-08-22 19:49:43,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-08-22 19:49:43,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:43,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-08-22 19:49:43,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=6125, Unknown=0, NotChecked=0, Total=6320 [2020-08-22 19:49:43,687 INFO L87 Difference]: Start difference. First operand 375 states and 377 transitions. Second operand 80 states. [2020-08-22 19:49:59,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:59,726 INFO L93 Difference]: Finished difference Result 755 states and 760 transitions. [2020-08-22 19:49:59,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-08-22 19:49:59,727 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 374 [2020-08-22 19:49:59,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:59,728 INFO L225 Difference]: With dead ends: 755 [2020-08-22 19:49:59,729 INFO L226 Difference]: Without dead ends: 398 [2020-08-22 19:49:59,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=580, Invalid=23912, Unknown=0, NotChecked=0, Total=24492 [2020-08-22 19:49:59,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-08-22 19:49:59,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 384. [2020-08-22 19:49:59,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-08-22 19:49:59,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 386 transitions. [2020-08-22 19:49:59,747 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 386 transitions. Word has length 374 [2020-08-22 19:49:59,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:59,747 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 386 transitions. [2020-08-22 19:49:59,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-08-22 19:49:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 386 transitions. [2020-08-22 19:49:59,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-08-22 19:49:59,750 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:59,750 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:49:59,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 19:49:59,751 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:59,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:59,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1231902441, now seen corresponding path program 39 times [2020-08-22 19:49:59,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:59,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [554598319] [2020-08-22 19:49:59,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:00,003 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:06,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:06,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [554598319] [2020-08-22 19:50:06,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:06,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2020-08-22 19:50:06,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476013548] [2020-08-22 19:50:06,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-08-22 19:50:06,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:06,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-08-22 19:50:06,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=6442, Unknown=0, NotChecked=0, Total=6642 [2020-08-22 19:50:06,988 INFO L87 Difference]: Start difference. First operand 384 states and 386 transitions. Second operand 82 states. [2020-08-22 19:50:24,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:24,398 INFO L93 Difference]: Finished difference Result 773 states and 778 transitions. [2020-08-22 19:50:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2020-08-22 19:50:24,399 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 383 [2020-08-22 19:50:24,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:24,401 INFO L225 Difference]: With dead ends: 773 [2020-08-22 19:50:24,401 INFO L226 Difference]: Without dead ends: 407 [2020-08-22 19:50:24,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=595, Invalid=25165, Unknown=0, NotChecked=0, Total=25760 [2020-08-22 19:50:24,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-08-22 19:50:24,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 393. [2020-08-22 19:50:24,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-08-22 19:50:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 395 transitions. [2020-08-22 19:50:24,418 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 395 transitions. Word has length 383 [2020-08-22 19:50:24,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:24,419 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 395 transitions. [2020-08-22 19:50:24,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-08-22 19:50:24,419 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 395 transitions. [2020-08-22 19:50:24,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-08-22 19:50:24,421 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:24,422 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:24,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 19:50:24,422 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:24,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:24,422 INFO L82 PathProgramCache]: Analyzing trace with hash 807779284, now seen corresponding path program 40 times [2020-08-22 19:50:24,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:24,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861389095] [2020-08-22 19:50:24,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:24,692 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:31,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:32,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861389095] [2020-08-22 19:50:32,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:32,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2020-08-22 19:50:32,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229064196] [2020-08-22 19:50:32,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-08-22 19:50:32,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:32,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-08-22 19:50:32,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=6767, Unknown=0, NotChecked=0, Total=6972 [2020-08-22 19:50:32,017 INFO L87 Difference]: Start difference. First operand 393 states and 395 transitions. Second operand 84 states. [2020-08-22 19:50:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:51,587 INFO L93 Difference]: Finished difference Result 791 states and 796 transitions. [2020-08-22 19:50:51,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2020-08-22 19:50:51,589 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 392 [2020-08-22 19:50:51,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:51,591 INFO L225 Difference]: With dead ends: 791 [2020-08-22 19:50:51,591 INFO L226 Difference]: Without dead ends: 416 [2020-08-22 19:50:51,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=610, Invalid=26450, Unknown=0, NotChecked=0, Total=27060 [2020-08-22 19:50:51,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-08-22 19:50:51,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 402. [2020-08-22 19:50:51,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-08-22 19:50:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 404 transitions. [2020-08-22 19:50:51,612 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 404 transitions. Word has length 392 [2020-08-22 19:50:51,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:51,612 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 404 transitions. [2020-08-22 19:50:51,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-08-22 19:50:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 404 transitions. [2020-08-22 19:50:51,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-08-22 19:50:51,615 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:51,616 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:51,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 19:50:51,616 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:51,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:51,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1344236983, now seen corresponding path program 41 times [2020-08-22 19:50:51,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:51,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364634195] [2020-08-22 19:50:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:51,927 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:52,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:59,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:59,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364634195] [2020-08-22 19:50:59,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:59,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2020-08-22 19:50:59,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998958726] [2020-08-22 19:50:59,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-08-22 19:50:59,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:59,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-08-22 19:50:59,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=7100, Unknown=0, NotChecked=0, Total=7310 [2020-08-22 19:50:59,979 INFO L87 Difference]: Start difference. First operand 402 states and 404 transitions. Second operand 86 states. [2020-08-22 19:51:21,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:51:21,715 INFO L93 Difference]: Finished difference Result 809 states and 814 transitions. [2020-08-22 19:51:21,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2020-08-22 19:51:21,716 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 401 [2020-08-22 19:51:21,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:51:21,718 INFO L225 Difference]: With dead ends: 809 [2020-08-22 19:51:21,718 INFO L226 Difference]: Without dead ends: 425 [2020-08-22 19:51:21,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=625, Invalid=27767, Unknown=0, NotChecked=0, Total=28392 [2020-08-22 19:51:21,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-08-22 19:51:21,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 411. [2020-08-22 19:51:21,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-08-22 19:51:21,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 413 transitions. [2020-08-22 19:51:21,737 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 413 transitions. Word has length 401 [2020-08-22 19:51:21,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:51:21,738 INFO L479 AbstractCegarLoop]: Abstraction has 411 states and 413 transitions. [2020-08-22 19:51:21,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-08-22 19:51:21,738 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 413 transitions. [2020-08-22 19:51:21,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-08-22 19:51:21,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:51:21,741 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:51:21,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 19:51:21,741 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:51:21,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:51:21,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2090609460, now seen corresponding path program 42 times [2020-08-22 19:51:21,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:51:21,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178397765] [2020-08-22 19:51:21,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:51:22,053 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:51:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:30,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:51:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:51:30,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178397765] [2020-08-22 19:51:30,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:51:30,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2020-08-22 19:51:30,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424719980] [2020-08-22 19:51:30,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-08-22 19:51:30,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:51:30,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-08-22 19:51:30,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=7441, Unknown=0, NotChecked=0, Total=7656 [2020-08-22 19:51:30,941 INFO L87 Difference]: Start difference. First operand 411 states and 413 transitions. Second operand 88 states. [2020-08-22 19:51:55,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:51:55,671 INFO L93 Difference]: Finished difference Result 827 states and 832 transitions. [2020-08-22 19:51:55,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-08-22 19:51:55,672 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 410 [2020-08-22 19:51:55,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:51:55,674 INFO L225 Difference]: With dead ends: 827 [2020-08-22 19:51:55,674 INFO L226 Difference]: Without dead ends: 434 [2020-08-22 19:51:55,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=640, Invalid=29116, Unknown=0, NotChecked=0, Total=29756 [2020-08-22 19:51:55,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-08-22 19:51:55,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 420. [2020-08-22 19:51:55,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-08-22 19:51:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 422 transitions. [2020-08-22 19:51:55,692 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 422 transitions. Word has length 410 [2020-08-22 19:51:55,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:51:55,692 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 422 transitions. [2020-08-22 19:51:55,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-08-22 19:51:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 422 transitions. [2020-08-22 19:51:55,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-08-22 19:51:55,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:51:55,695 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:51:55,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 19:51:55,696 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:51:55,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:51:55,696 INFO L82 PathProgramCache]: Analyzing trace with hash 469781079, now seen corresponding path program 43 times [2020-08-22 19:51:55,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:51:55,697 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691405100] [2020-08-22 19:51:55,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:51:55,941 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:51:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:05,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:52:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:06,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:52:06,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691405100] [2020-08-22 19:52:06,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:52:06,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2020-08-22 19:52:06,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425731056] [2020-08-22 19:52:06,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-08-22 19:52:06,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:52:06,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-08-22 19:52:06,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=7790, Unknown=0, NotChecked=0, Total=8010 [2020-08-22 19:52:06,009 INFO L87 Difference]: Start difference. First operand 420 states and 422 transitions. Second operand 90 states. [2020-08-22 19:52:35,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:52:35,057 INFO L93 Difference]: Finished difference Result 845 states and 850 transitions. [2020-08-22 19:52:35,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-08-22 19:52:35,059 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 419 [2020-08-22 19:52:35,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:52:35,061 INFO L225 Difference]: With dead ends: 845 [2020-08-22 19:52:35,061 INFO L226 Difference]: Without dead ends: 443 [2020-08-22 19:52:35,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=655, Invalid=30497, Unknown=0, NotChecked=0, Total=31152 [2020-08-22 19:52:35,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-08-22 19:52:35,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 429. [2020-08-22 19:52:35,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-08-22 19:52:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 431 transitions. [2020-08-22 19:52:35,080 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 431 transitions. Word has length 419 [2020-08-22 19:52:35,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:52:35,080 INFO L479 AbstractCegarLoop]: Abstraction has 429 states and 431 transitions. [2020-08-22 19:52:35,080 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-08-22 19:52:35,081 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 431 transitions. [2020-08-22 19:52:35,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-08-22 19:52:35,083 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:52:35,084 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:52:35,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 19:52:35,084 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:52:35,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:52:35,084 INFO L82 PathProgramCache]: Analyzing trace with hash -673611116, now seen corresponding path program 44 times [2020-08-22 19:52:35,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:52:35,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393136014] [2020-08-22 19:52:35,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:52:35,432 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:52:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:46,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:52:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:46,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:52:46,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393136014] [2020-08-22 19:52:46,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:52:46,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2020-08-22 19:52:46,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483313985] [2020-08-22 19:52:46,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-08-22 19:52:46,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:52:46,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-08-22 19:52:46,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=8147, Unknown=0, NotChecked=0, Total=8372 [2020-08-22 19:52:46,545 INFO L87 Difference]: Start difference. First operand 429 states and 431 transitions. Second operand 92 states. [2020-08-22 19:53:20,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:53:20,906 INFO L93 Difference]: Finished difference Result 863 states and 868 transitions. [2020-08-22 19:53:20,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2020-08-22 19:53:20,908 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 428 [2020-08-22 19:53:20,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:53:20,911 INFO L225 Difference]: With dead ends: 863 [2020-08-22 19:53:20,911 INFO L226 Difference]: Without dead ends: 452 [2020-08-22 19:53:20,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3917 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=670, Invalid=31910, Unknown=0, NotChecked=0, Total=32580 [2020-08-22 19:53:20,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-08-22 19:53:20,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2020-08-22 19:53:20,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-08-22 19:53:20,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 440 transitions. [2020-08-22 19:53:20,931 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 440 transitions. Word has length 428 [2020-08-22 19:53:20,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:53:20,932 INFO L479 AbstractCegarLoop]: Abstraction has 438 states and 440 transitions. [2020-08-22 19:53:20,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-08-22 19:53:20,932 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 440 transitions. [2020-08-22 19:53:20,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-08-22 19:53:20,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:53:20,935 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:53:20,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 19:53:20,935 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:53:20,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:53:20,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1503707401, now seen corresponding path program 45 times [2020-08-22 19:53:20,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:53:20,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184442518] [2020-08-22 19:53:20,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:53:21,487 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:53:21,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:33,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:53:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:33,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:53:33,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184442518] [2020-08-22 19:53:33,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:53:33,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2020-08-22 19:53:33,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478774366] [2020-08-22 19:53:33,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-08-22 19:53:33,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:53:33,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-08-22 19:53:33,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=8512, Unknown=0, NotChecked=0, Total=8742 [2020-08-22 19:53:33,981 INFO L87 Difference]: Start difference. First operand 438 states and 440 transitions. Second operand 94 states. [2020-08-22 19:54:14,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:54:14,217 INFO L93 Difference]: Finished difference Result 881 states and 886 transitions. [2020-08-22 19:54:14,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2020-08-22 19:54:14,220 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 437 [2020-08-22 19:54:14,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:54:14,222 INFO L225 Difference]: With dead ends: 881 [2020-08-22 19:54:14,222 INFO L226 Difference]: Without dead ends: 461 [2020-08-22 19:54:14,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4096 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=685, Invalid=33355, Unknown=0, NotChecked=0, Total=34040 [2020-08-22 19:54:14,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-08-22 19:54:14,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 447. [2020-08-22 19:54:14,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-08-22 19:54:14,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 449 transitions. [2020-08-22 19:54:14,239 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 449 transitions. Word has length 437 [2020-08-22 19:54:14,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:54:14,240 INFO L479 AbstractCegarLoop]: Abstraction has 447 states and 449 transitions. [2020-08-22 19:54:14,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-08-22 19:54:14,240 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 449 transitions. [2020-08-22 19:54:14,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2020-08-22 19:54:14,243 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:54:14,243 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:54:14,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 19:54:14,243 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:54:14,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:54:14,244 INFO L82 PathProgramCache]: Analyzing trace with hash -990658060, now seen corresponding path program 46 times [2020-08-22 19:54:14,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:54:14,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919913331] [2020-08-22 19:54:14,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:54:14,567 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:54:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:54:28,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:54:28,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:54:28,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:54:28,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919913331] [2020-08-22 19:54:28,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:54:28,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2020-08-22 19:54:28,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502995755] [2020-08-22 19:54:28,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-08-22 19:54:28,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:54:28,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-08-22 19:54:28,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=8885, Unknown=0, NotChecked=0, Total=9120 [2020-08-22 19:54:28,686 INFO L87 Difference]: Start difference. First operand 447 states and 449 transitions. Second operand 96 states. [2020-08-22 19:55:15,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:55:15,231 INFO L93 Difference]: Finished difference Result 899 states and 904 transitions. [2020-08-22 19:55:15,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2020-08-22 19:55:15,235 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 446 [2020-08-22 19:55:15,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:55:15,237 INFO L225 Difference]: With dead ends: 899 [2020-08-22 19:55:15,237 INFO L226 Difference]: Without dead ends: 470 [2020-08-22 19:55:15,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4279 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=700, Invalid=34832, Unknown=0, NotChecked=0, Total=35532 [2020-08-22 19:55:15,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-08-22 19:55:15,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 456. [2020-08-22 19:55:15,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-22 19:55:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 458 transitions. [2020-08-22 19:55:15,253 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 458 transitions. Word has length 446 [2020-08-22 19:55:15,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:55:15,254 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 458 transitions. [2020-08-22 19:55:15,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-08-22 19:55:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 458 transitions. [2020-08-22 19:55:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2020-08-22 19:55:15,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:55:15,257 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:55:15,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 19:55:15,257 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:55:15,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:55:15,258 INFO L82 PathProgramCache]: Analyzing trace with hash -2065282153, now seen corresponding path program 47 times [2020-08-22 19:55:15,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:55:15,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051382799] [2020-08-22 19:55:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:55:15,477 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:55:15,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:31,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:55:31,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:55:31,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051382799] [2020-08-22 19:55:31,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:55:31,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2020-08-22 19:55:31,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673045926] [2020-08-22 19:55:31,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-08-22 19:55:31,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:55:31,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-08-22 19:55:31,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=9266, Unknown=0, NotChecked=0, Total=9506 [2020-08-22 19:55:31,778 INFO L87 Difference]: Start difference. First operand 456 states and 458 transitions. Second operand 98 states. [2020-08-22 19:56:25,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:56:25,538 INFO L93 Difference]: Finished difference Result 917 states and 922 transitions. [2020-08-22 19:56:25,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2020-08-22 19:56:25,540 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 455 [2020-08-22 19:56:25,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:56:25,543 INFO L225 Difference]: With dead ends: 917 [2020-08-22 19:56:25,543 INFO L226 Difference]: Without dead ends: 479 [2020-08-22 19:56:25,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4466 ImplicationChecksByTransitivity, 30.3s TimeCoverageRelationStatistics Valid=715, Invalid=36341, Unknown=0, NotChecked=0, Total=37056 [2020-08-22 19:56:25,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2020-08-22 19:56:25,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 465. [2020-08-22 19:56:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 465 states. [2020-08-22 19:56:25,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 467 transitions. [2020-08-22 19:56:25,559 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 467 transitions. Word has length 455 [2020-08-22 19:56:25,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:56:25,560 INFO L479 AbstractCegarLoop]: Abstraction has 465 states and 467 transitions. [2020-08-22 19:56:25,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-08-22 19:56:25,560 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 467 transitions. [2020-08-22 19:56:25,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-08-22 19:56:25,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:56:25,564 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:56:25,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 19:56:25,564 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:56:25,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:56:25,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1837164884, now seen corresponding path program 48 times [2020-08-22 19:56:25,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:56:25,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340753578] [2020-08-22 19:56:25,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:56:26,522 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:56:26,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:56:44,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:56:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:56:44,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:56:44,818 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340753578] [2020-08-22 19:56:44,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:56:44,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2020-08-22 19:56:44,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465598179] [2020-08-22 19:56:44,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-08-22 19:56:44,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:56:44,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-08-22 19:56:44,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=9655, Unknown=0, NotChecked=0, Total=9900 [2020-08-22 19:56:44,820 INFO L87 Difference]: Start difference. First operand 465 states and 467 transitions. Second operand 100 states. [2020-08-22 19:57:47,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:57:47,910 INFO L93 Difference]: Finished difference Result 935 states and 940 transitions. [2020-08-22 19:57:47,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2020-08-22 19:57:47,913 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 464 [2020-08-22 19:57:47,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:57:47,916 INFO L225 Difference]: With dead ends: 935 [2020-08-22 19:57:47,916 INFO L226 Difference]: Without dead ends: 488 [2020-08-22 19:57:47,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4657 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=730, Invalid=37882, Unknown=0, NotChecked=0, Total=38612 [2020-08-22 19:57:47,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2020-08-22 19:57:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 474. [2020-08-22 19:57:47,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2020-08-22 19:57:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 476 transitions. [2020-08-22 19:57:47,932 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 476 transitions. Word has length 464 [2020-08-22 19:57:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:57:47,934 INFO L479 AbstractCegarLoop]: Abstraction has 474 states and 476 transitions. [2020-08-22 19:57:47,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-08-22 19:57:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 476 transitions. [2020-08-22 19:57:47,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-08-22 19:57:47,938 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:57:47,938 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:57:47,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 19:57:47,938 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:57:47,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:57:47,939 INFO L82 PathProgramCache]: Analyzing trace with hash -155226057, now seen corresponding path program 49 times [2020-08-22 19:57:47,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:57:47,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006938646] [2020-08-22 19:57:47,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:57:48,144 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:57:48,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:58:09,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:58:09,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:58:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:58:09,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006938646] [2020-08-22 19:58:09,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:58:09,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2020-08-22 19:58:09,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940145611] [2020-08-22 19:58:09,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-08-22 19:58:09,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:58:09,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-08-22 19:58:09,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=10052, Unknown=0, NotChecked=0, Total=10302 [2020-08-22 19:58:09,524 INFO L87 Difference]: Start difference. First operand 474 states and 476 transitions. Second operand 102 states.