/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 0.1.25-3af5e1f [2020-09-04 17:44:39,755 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:44:39,759 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:44:39,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:44:39,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:44:39,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:44:39,793 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:44:39,795 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:44:39,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:44:39,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:44:39,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:44:39,801 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:44:39,801 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:44:39,803 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:44:39,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:44:39,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:44:39,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:44:39,807 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:44:39,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:44:39,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:44:39,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:44:39,815 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:44:39,816 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:44:39,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:44:39,821 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:44:39,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:44:39,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:44:39,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:44:39,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 17:44:39,848 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:44:39,848 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:44:39,850 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:44:39,850 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:44:39,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:44:39,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:44:39,851 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:44:39,852 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:44:39,852 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:44:39,852 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:44:39,852 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:44:39,853 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:44:39,853 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:44:39,853 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:44:39,853 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:44:39,854 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:44:39,855 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:44:39,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:44:39,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:44:39,855 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:44:39,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:44:39,856 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:44:39,856 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:44:40,300 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:44:40,323 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:44:40,328 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:44:40,330 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:44:40,331 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:44:40,332 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-2.c [2020-09-04 17:44:40,427 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f7618cd2/222682666c634eca8c986d0d8ddf5004/FLAGa7d88f679 [2020-09-04 17:44:40,960 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:44:40,961 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/heavy-2.c [2020-09-04 17:44:40,969 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f7618cd2/222682666c634eca8c986d0d8ddf5004/FLAGa7d88f679 [2020-09-04 17:44:41,287 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8f7618cd2/222682666c634eca8c986d0d8ddf5004 [2020-09-04 17:44:41,300 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:44:41,302 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:44:41,303 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:44:41,303 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:44:41,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:44:41,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:44:41" (1/1) ... [2020-09-04 17:44:41,312 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38dfc093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:41, skipping insertion in model container [2020-09-04 17:44:41,312 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:44:41" (1/1) ... [2020-09-04 17:44:41,321 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:44:41,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:44:41,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:44:41,600 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:44:41,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:44:41,698 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:44:41,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:41 WrapperNode [2020-09-04 17:44:41,699 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:44:41,700 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:44:41,700 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:44:41,700 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:44:41,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:41" (1/1) ... [2020-09-04 17:44:41,783 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:41" (1/1) ... [2020-09-04 17:44:41,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:41" (1/1) ... [2020-09-04 17:44:41,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:41" (1/1) ... [2020-09-04 17:44:41,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:41" (1/1) ... [2020-09-04 17:44:41,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:41" (1/1) ... [2020-09-04 17:44:41,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:41" (1/1) ... [2020-09-04 17:44:41,810 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:44:41,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:44:41,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:44:41,811 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:44:41,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:44:41,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:44:41,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:44:41,887 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:44:41,887 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:44:41,888 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:44:41,888 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 17:44:41,888 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 17:44:41,888 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:44:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 17:44:41,889 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-09-04 17:44:41,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:44:41,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 17:44:42,168 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:44:42,169 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 17:44:42,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:44:42 BoogieIcfgContainer [2020-09-04 17:44:42,174 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:44:42,176 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:44:42,176 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:44:42,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:44:42,180 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:44:41" (1/3) ... [2020-09-04 17:44:42,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b986c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:44:42, skipping insertion in model container [2020-09-04 17:44:42,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:44:41" (2/3) ... [2020-09-04 17:44:42,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70b986c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:44:42, skipping insertion in model container [2020-09-04 17:44:42,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:44:42" (3/3) ... [2020-09-04 17:44:42,185 INFO L109 eAbstractionObserver]: Analyzing ICFG heavy-2.c [2020-09-04 17:44:42,198 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:44:42,208 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:44:42,231 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:44:42,261 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:44:42,261 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:44:42,262 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:44:42,262 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:44:42,262 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:44:42,262 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:44:42,262 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:44:42,262 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:44:42,282 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-09-04 17:44:42,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 17:44:42,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:42,295 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] [2020-09-04 17:44:42,296 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:42,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:42,302 INFO L82 PathProgramCache]: Analyzing trace with hash 245897808, now seen corresponding path program 1 times [2020-09-04 17:44:42,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:42,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723063647] [2020-09-04 17:44:42,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:42,380 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:42,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:42,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723063647] [2020-09-04 17:44:42,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:42,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 17:44:42,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063786388] [2020-09-04 17:44:42,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 17:44:42,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:42,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 17:44:42,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 17:44:42,591 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-09-04 17:44:42,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:42,787 INFO L93 Difference]: Finished difference Result 98 states and 117 transitions. [2020-09-04 17:44:42,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 17:44:42,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-09-04 17:44:42,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:42,802 INFO L225 Difference]: With dead ends: 98 [2020-09-04 17:44:42,802 INFO L226 Difference]: Without dead ends: 56 [2020-09-04 17:44:42,807 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 [2020-09-04 17:44:42,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-04 17:44:42,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 39. [2020-09-04 17:44:42,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 17:44:42,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-09-04 17:44:42,861 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 20 [2020-09-04 17:44:42,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:42,861 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-09-04 17:44:42,861 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 17:44:42,861 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-09-04 17:44:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-04 17:44:42,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:42,863 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] [2020-09-04 17:44:42,863 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:44:42,863 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:42,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:42,864 INFO L82 PathProgramCache]: Analyzing trace with hash 245856485, now seen corresponding path program 1 times [2020-09-04 17:44:42,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:42,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009862392] [2020-09-04 17:44:42,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:42,867 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:42,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:42,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:42,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009862392] [2020-09-04 17:44:42,980 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:42,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 17:44:42,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270953861] [2020-09-04 17:44:42,981 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 17:44:42,981 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:42,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 17:44:42,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 17:44:42,982 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 4 states. [2020-09-04 17:44:43,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:43,171 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2020-09-04 17:44:43,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 17:44:43,172 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-09-04 17:44:43,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:43,174 INFO L225 Difference]: With dead ends: 88 [2020-09-04 17:44:43,175 INFO L226 Difference]: Without dead ends: 85 [2020-09-04 17:44:43,176 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 [2020-09-04 17:44:43,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-04 17:44:43,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 40. [2020-09-04 17:44:43,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-04 17:44:43,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2020-09-04 17:44:43,190 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 20 [2020-09-04 17:44:43,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:43,190 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2020-09-04 17:44:43,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 17:44:43,191 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2020-09-04 17:44:43,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 17:44:43,192 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:43,192 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] [2020-09-04 17:44:43,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:44:43,193 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:43,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:43,193 INFO L82 PathProgramCache]: Analyzing trace with hash 352436069, now seen corresponding path program 1 times [2020-09-04 17:44:43,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:43,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1716574079] [2020-09-04 17:44:43,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:43,220 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:43,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:43,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:43,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1716574079] [2020-09-04 17:44:43,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:43,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 17:44:43,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631415730] [2020-09-04 17:44:43,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 17:44:43,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:43,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 17:44:43,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 17:44:43,313 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 4 states. [2020-09-04 17:44:43,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:43,483 INFO L93 Difference]: Finished difference Result 100 states and 110 transitions. [2020-09-04 17:44:43,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 17:44:43,484 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-09-04 17:44:43,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:43,486 INFO L225 Difference]: With dead ends: 100 [2020-09-04 17:44:43,486 INFO L226 Difference]: Without dead ends: 78 [2020-09-04 17:44:43,487 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 [2020-09-04 17:44:43,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-04 17:44:43,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 41. [2020-09-04 17:44:43,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-04 17:44:43,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-09-04 17:44:43,496 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 26 [2020-09-04 17:44:43,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:43,497 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-09-04 17:44:43,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 17:44:43,497 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-09-04 17:44:43,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-04 17:44:43,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:43,499 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] [2020-09-04 17:44:43,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:44:43,499 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:43,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:43,500 INFO L82 PathProgramCache]: Analyzing trace with hash -80258988, now seen corresponding path program 1 times [2020-09-04 17:44:43,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:43,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851752742] [2020-09-04 17:44:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:43,513 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:43,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:43,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851752742] [2020-09-04 17:44:43,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:43,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 17:44:43,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028066922] [2020-09-04 17:44:43,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 17:44:43,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:43,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 17:44:43,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 17:44:43,591 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 4 states. [2020-09-04 17:44:43,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:43,730 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2020-09-04 17:44:43,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 17:44:43,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-09-04 17:44:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:43,731 INFO L225 Difference]: With dead ends: 79 [2020-09-04 17:44:43,732 INFO L226 Difference]: Without dead ends: 56 [2020-09-04 17:44:43,732 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 [2020-09-04 17:44:43,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-04 17:44:43,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2020-09-04 17:44:43,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 17:44:43,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-04 17:44:43,741 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 32 [2020-09-04 17:44:43,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:43,741 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-04 17:44:43,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 17:44:43,741 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-04 17:44:43,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 17:44:43,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:43,743 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] [2020-09-04 17:44:43,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:44:43,743 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:43,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:43,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1305862455, now seen corresponding path program 1 times [2020-09-04 17:44:43,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:43,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371001972] [2020-09-04 17:44:43,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:43,763 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:43,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:43,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371001972] [2020-09-04 17:44:43,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:43,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 17:44:43,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912248976] [2020-09-04 17:44:43,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 17:44:43,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:43,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 17:44:43,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:44:43,964 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 6 states. [2020-09-04 17:44:44,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:44,115 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2020-09-04 17:44:44,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 17:44:44,116 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-09-04 17:44:44,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:44,117 INFO L225 Difference]: With dead ends: 89 [2020-09-04 17:44:44,117 INFO L226 Difference]: Without dead ends: 65 [2020-09-04 17:44:44,118 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 [2020-09-04 17:44:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-04 17:44:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2020-09-04 17:44:44,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 17:44:44,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2020-09-04 17:44:44,127 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 41 [2020-09-04 17:44:44,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:44,128 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2020-09-04 17:44:44,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 17:44:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2020-09-04 17:44:44,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-04 17:44:44,130 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:44,130 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] [2020-09-04 17:44:44,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:44:44,130 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:44,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:44,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1372608588, now seen corresponding path program 2 times [2020-09-04 17:44:44,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:44,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800507629] [2020-09-04 17:44:44,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:44,155 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:44,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:44,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800507629] [2020-09-04 17:44:44,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:44,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 17:44:44,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670151901] [2020-09-04 17:44:44,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 17:44:44,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:44,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 17:44:44,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-04 17:44:44,340 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand 8 states. [2020-09-04 17:44:44,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:44,567 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2020-09-04 17:44:44,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 17:44:44,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 50 [2020-09-04 17:44:44,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:44,569 INFO L225 Difference]: With dead ends: 107 [2020-09-04 17:44:44,569 INFO L226 Difference]: Without dead ends: 74 [2020-09-04 17:44:44,570 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 [2020-09-04 17:44:44,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-04 17:44:44,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-09-04 17:44:44,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 17:44:44,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-09-04 17:44:44,580 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 50 [2020-09-04 17:44:44,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:44,580 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-09-04 17:44:44,580 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 17:44:44,581 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-09-04 17:44:44,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-04 17:44:44,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:44,582 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] [2020-09-04 17:44:44,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 17:44:44,583 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:44,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:44,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1219437097, now seen corresponding path program 3 times [2020-09-04 17:44:44,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:44,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202105647] [2020-09-04 17:44:44,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:44,599 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:44,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:44,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202105647] [2020-09-04 17:44:44,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:44,804 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 17:44:44,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887204493] [2020-09-04 17:44:44,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 17:44:44,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:44,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 17:44:44,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-09-04 17:44:44,808 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 10 states. [2020-09-04 17:44:45,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:45,198 INFO L93 Difference]: Finished difference Result 125 states and 130 transitions. [2020-09-04 17:44:45,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 17:44:45,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 59 [2020-09-04 17:44:45,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:45,200 INFO L225 Difference]: With dead ends: 125 [2020-09-04 17:44:45,200 INFO L226 Difference]: Without dead ends: 83 [2020-09-04 17:44:45,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-04 17:44:45,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-04 17:44:45,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 69. [2020-09-04 17:44:45,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-04 17:44:45,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2020-09-04 17:44:45,220 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 59 [2020-09-04 17:44:45,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:45,222 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2020-09-04 17:44:45,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 17:44:45,223 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2020-09-04 17:44:45,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-04 17:44:45,225 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:45,225 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] [2020-09-04 17:44:45,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 17:44:45,225 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:45,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:45,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1194778388, now seen corresponding path program 4 times [2020-09-04 17:44:45,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:45,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564300608] [2020-09-04 17:44:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:45,270 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:45,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:45,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564300608] [2020-09-04 17:44:45,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:45,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-04 17:44:45,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556486915] [2020-09-04 17:44:45,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 17:44:45,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:45,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 17:44:45,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-09-04 17:44:45,563 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand 12 states. [2020-09-04 17:44:45,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:45,986 INFO L93 Difference]: Finished difference Result 143 states and 148 transitions. [2020-09-04 17:44:45,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-04 17:44:45,987 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 68 [2020-09-04 17:44:45,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:45,988 INFO L225 Difference]: With dead ends: 143 [2020-09-04 17:44:45,988 INFO L226 Difference]: Without dead ends: 92 [2020-09-04 17:44:45,989 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 [2020-09-04 17:44:45,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-04 17:44:45,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2020-09-04 17:44:45,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-04 17:44:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2020-09-04 17:44:46,000 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 68 [2020-09-04 17:44:46,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:46,001 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2020-09-04 17:44:46,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 17:44:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2020-09-04 17:44:46,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-09-04 17:44:46,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:46,002 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] [2020-09-04 17:44:46,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 17:44:46,003 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:46,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:46,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1191054729, now seen corresponding path program 5 times [2020-09-04 17:44:46,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:46,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644410423] [2020-09-04 17:44:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:46,029 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:46,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:46,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644410423] [2020-09-04 17:44:46,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:46,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 17:44:46,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683102942] [2020-09-04 17:44:46,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 17:44:46,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:46,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 17:44:46,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-09-04 17:44:46,311 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 14 states. [2020-09-04 17:44:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:46,789 INFO L93 Difference]: Finished difference Result 161 states and 166 transitions. [2020-09-04 17:44:46,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 17:44:46,789 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 77 [2020-09-04 17:44:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:46,791 INFO L225 Difference]: With dead ends: 161 [2020-09-04 17:44:46,791 INFO L226 Difference]: Without dead ends: 101 [2020-09-04 17:44:46,792 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 [2020-09-04 17:44:46,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-04 17:44:46,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 87. [2020-09-04 17:44:46,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-04 17:44:46,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-09-04 17:44:46,812 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 77 [2020-09-04 17:44:46,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:46,813 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-09-04 17:44:46,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 17:44:46,818 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-09-04 17:44:46,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 17:44:46,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:46,824 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] [2020-09-04 17:44:46,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 17:44:46,824 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:46,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:46,825 INFO L82 PathProgramCache]: Analyzing trace with hash 123928180, now seen corresponding path program 6 times [2020-09-04 17:44:46,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:46,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120309953] [2020-09-04 17:44:46,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:46,875 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:47,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:47,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:47,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120309953] [2020-09-04 17:44:47,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:47,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-04 17:44:47,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042031687] [2020-09-04 17:44:47,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 17:44:47,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:47,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 17:44:47,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-09-04 17:44:47,209 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 16 states. [2020-09-04 17:44:47,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:47,953 INFO L93 Difference]: Finished difference Result 179 states and 184 transitions. [2020-09-04 17:44:47,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 17:44:47,954 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-09-04 17:44:47,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:47,955 INFO L225 Difference]: With dead ends: 179 [2020-09-04 17:44:47,955 INFO L226 Difference]: Without dead ends: 110 [2020-09-04 17:44:47,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2020-09-04 17:44:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-04 17:44:47,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 96. [2020-09-04 17:44:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-04 17:44:47,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2020-09-04 17:44:47,975 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 86 [2020-09-04 17:44:47,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:47,976 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2020-09-04 17:44:47,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 17:44:47,980 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2020-09-04 17:44:47,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-04 17:44:47,982 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:47,985 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] [2020-09-04 17:44:47,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 17:44:47,985 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:47,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:47,986 INFO L82 PathProgramCache]: Analyzing trace with hash -359457001, now seen corresponding path program 7 times [2020-09-04 17:44:47,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:47,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769556668] [2020-09-04 17:44:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:48,018 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:48,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:48,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:48,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769556668] [2020-09-04 17:44:48,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:48,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-04 17:44:48,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482989235] [2020-09-04 17:44:48,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 17:44:48,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:48,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 17:44:48,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2020-09-04 17:44:48,413 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand 18 states. [2020-09-04 17:44:49,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:49,227 INFO L93 Difference]: Finished difference Result 197 states and 202 transitions. [2020-09-04 17:44:49,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 17:44:49,228 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-09-04 17:44:49,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:49,229 INFO L225 Difference]: With dead ends: 197 [2020-09-04 17:44:49,229 INFO L226 Difference]: Without dead ends: 119 [2020-09-04 17:44:49,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=941, Unknown=0, NotChecked=0, Total=1056 [2020-09-04 17:44:49,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-04 17:44:49,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 105. [2020-09-04 17:44:49,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-04 17:44:49,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2020-09-04 17:44:49,240 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 95 [2020-09-04 17:44:49,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:49,240 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2020-09-04 17:44:49,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 17:44:49,241 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2020-09-04 17:44:49,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-09-04 17:44:49,242 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:49,242 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] [2020-09-04 17:44:49,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 17:44:49,243 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:49,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:49,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1447691732, now seen corresponding path program 8 times [2020-09-04 17:44:49,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:49,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939476455] [2020-09-04 17:44:49,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:49,287 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:49,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:49,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939476455] [2020-09-04 17:44:49,712 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:49,712 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-09-04 17:44:49,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015756064] [2020-09-04 17:44:49,713 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 17:44:49,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:49,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 17:44:49,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2020-09-04 17:44:49,714 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand 20 states. [2020-09-04 17:44:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:50,790 INFO L93 Difference]: Finished difference Result 215 states and 220 transitions. [2020-09-04 17:44:50,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 17:44:50,791 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 104 [2020-09-04 17:44:50,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:50,792 INFO L225 Difference]: With dead ends: 215 [2020-09-04 17:44:50,792 INFO L226 Difference]: Without dead ends: 128 [2020-09-04 17:44:50,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=1202, Unknown=0, NotChecked=0, Total=1332 [2020-09-04 17:44:50,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-04 17:44:50,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2020-09-04 17:44:50,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-04 17:44:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2020-09-04 17:44:50,803 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 104 [2020-09-04 17:44:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:50,803 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2020-09-04 17:44:50,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 17:44:50,803 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2020-09-04 17:44:50,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-04 17:44:50,804 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:50,805 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] [2020-09-04 17:44:50,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 17:44:50,805 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:50,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:50,806 INFO L82 PathProgramCache]: Analyzing trace with hash 221143991, now seen corresponding path program 9 times [2020-09-04 17:44:50,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:50,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [378275483] [2020-09-04 17:44:50,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:50,849 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:51,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:51,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [378275483] [2020-09-04 17:44:51,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:51,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-09-04 17:44:51,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109915894] [2020-09-04 17:44:51,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 17:44:51,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:51,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 17:44:51,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-09-04 17:44:51,414 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand 22 states. [2020-09-04 17:44:52,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:52,666 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2020-09-04 17:44:52,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 17:44:52,666 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 113 [2020-09-04 17:44:52,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:52,668 INFO L225 Difference]: With dead ends: 233 [2020-09-04 17:44:52,668 INFO L226 Difference]: Without dead ends: 137 [2020-09-04 17:44:52,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=145, Invalid=1495, Unknown=0, NotChecked=0, Total=1640 [2020-09-04 17:44:52,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-04 17:44:52,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 123. [2020-09-04 17:44:52,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-09-04 17:44:52,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-09-04 17:44:52,678 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 113 [2020-09-04 17:44:52,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:52,678 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-09-04 17:44:52,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 17:44:52,678 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-09-04 17:44:52,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-09-04 17:44:52,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:52,680 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] [2020-09-04 17:44:52,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 17:44:52,680 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:52,680 INFO L82 PathProgramCache]: Analyzing trace with hash 570553652, now seen corresponding path program 10 times [2020-09-04 17:44:52,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:52,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428258375] [2020-09-04 17:44:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:52,714 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:53,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:53,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:53,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428258375] [2020-09-04 17:44:53,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:53,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-09-04 17:44:53,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672279822] [2020-09-04 17:44:53,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 17:44:53,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:53,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 17:44:53,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-09-04 17:44:53,295 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 24 states. [2020-09-04 17:44:54,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:54,868 INFO L93 Difference]: Finished difference Result 251 states and 256 transitions. [2020-09-04 17:44:54,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 17:44:54,872 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 122 [2020-09-04 17:44:54,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:54,873 INFO L225 Difference]: With dead ends: 251 [2020-09-04 17:44:54,873 INFO L226 Difference]: Without dead ends: 146 [2020-09-04 17:44:54,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=160, Invalid=1820, Unknown=0, NotChecked=0, Total=1980 [2020-09-04 17:44:54,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-04 17:44:54,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 132. [2020-09-04 17:44:54,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-04 17:44:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2020-09-04 17:44:54,884 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 122 [2020-09-04 17:44:54,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:54,885 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2020-09-04 17:44:54,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 17:44:54,885 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2020-09-04 17:44:54,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-04 17:44:54,886 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:54,887 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] [2020-09-04 17:44:54,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 17:44:54,887 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:54,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:54,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1417822121, now seen corresponding path program 11 times [2020-09-04 17:44:54,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:54,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803232128] [2020-09-04 17:44:54,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:54,926 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:55,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:55,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:55,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:55,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803232128] [2020-09-04 17:44:55,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:55,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-09-04 17:44:55,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830884228] [2020-09-04 17:44:55,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 17:44:55,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:55,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 17:44:55,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-09-04 17:44:55,640 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand 26 states. [2020-09-04 17:44:57,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:44:57,429 INFO L93 Difference]: Finished difference Result 269 states and 274 transitions. [2020-09-04 17:44:57,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 17:44:57,430 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 131 [2020-09-04 17:44:57,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:44:57,432 INFO L225 Difference]: With dead ends: 269 [2020-09-04 17:44:57,432 INFO L226 Difference]: Without dead ends: 155 [2020-09-04 17:44:57,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=175, Invalid=2177, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 17:44:57,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-04 17:44:57,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 141. [2020-09-04 17:44:57,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-09-04 17:44:57,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 143 transitions. [2020-09-04 17:44:57,442 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 143 transitions. Word has length 131 [2020-09-04 17:44:57,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:44:57,442 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 143 transitions. [2020-09-04 17:44:57,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 17:44:57,442 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 143 transitions. [2020-09-04 17:44:57,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-09-04 17:44:57,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:44:57,444 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] [2020-09-04 17:44:57,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 17:44:57,444 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:44:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:44:57,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1059114132, now seen corresponding path program 12 times [2020-09-04 17:44:57,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:44:57,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792941897] [2020-09-04 17:44:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:44:57,490 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:44:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:58,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:44:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:44:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:44:58,213 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792941897] [2020-09-04 17:44:58,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:44:58,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-09-04 17:44:58,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343252257] [2020-09-04 17:44:58,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 17:44:58,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:44:58,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 17:44:58,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=691, Unknown=0, NotChecked=0, Total=756 [2020-09-04 17:44:58,215 INFO L87 Difference]: Start difference. First operand 141 states and 143 transitions. Second operand 28 states. [2020-09-04 17:45:00,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:00,296 INFO L93 Difference]: Finished difference Result 287 states and 292 transitions. [2020-09-04 17:45:00,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 17:45:00,297 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 140 [2020-09-04 17:45:00,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:00,299 INFO L225 Difference]: With dead ends: 287 [2020-09-04 17:45:00,299 INFO L226 Difference]: Without dead ends: 164 [2020-09-04 17:45:00,300 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 [2020-09-04 17:45:00,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-09-04 17:45:00,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 150. [2020-09-04 17:45:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-09-04 17:45:00,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2020-09-04 17:45:00,309 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 140 [2020-09-04 17:45:00,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:00,309 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2020-09-04 17:45:00,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 17:45:00,310 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2020-09-04 17:45:00,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-09-04 17:45:00,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:00,311 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] [2020-09-04 17:45:00,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 17:45:00,312 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:00,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:00,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1179962121, now seen corresponding path program 13 times [2020-09-04 17:45:00,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:00,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718026335] [2020-09-04 17:45:00,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:00,372 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:01,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:01,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:01,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718026335] [2020-09-04 17:45:01,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:01,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-09-04 17:45:01,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714568009] [2020-09-04 17:45:01,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 17:45:01,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:01,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 17:45:01,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-09-04 17:45:01,398 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand 30 states. [2020-09-04 17:45:03,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:03,851 INFO L93 Difference]: Finished difference Result 305 states and 310 transitions. [2020-09-04 17:45:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-04 17:45:03,852 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 149 [2020-09-04 17:45:03,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:03,853 INFO L225 Difference]: With dead ends: 305 [2020-09-04 17:45:03,853 INFO L226 Difference]: Without dead ends: 173 [2020-09-04 17:45:03,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=205, Invalid=2987, Unknown=0, NotChecked=0, Total=3192 [2020-09-04 17:45:03,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-09-04 17:45:03,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 159. [2020-09-04 17:45:03,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-09-04 17:45:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2020-09-04 17:45:03,863 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 149 [2020-09-04 17:45:03,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:03,864 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2020-09-04 17:45:03,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 17:45:03,864 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2020-09-04 17:45:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-09-04 17:45:03,865 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:03,865 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] [2020-09-04 17:45:03,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 17:45:03,866 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:03,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:03,866 INFO L82 PathProgramCache]: Analyzing trace with hash -927167500, now seen corresponding path program 14 times [2020-09-04 17:45:03,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:03,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1903267982] [2020-09-04 17:45:03,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:03,928 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:04,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:04,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:04,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1903267982] [2020-09-04 17:45:04,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:04,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-09-04 17:45:04,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697090522] [2020-09-04 17:45:04,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 17:45:04,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:04,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 17:45:04,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-09-04 17:45:04,928 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 32 states. [2020-09-04 17:45:07,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:07,743 INFO L93 Difference]: Finished difference Result 323 states and 328 transitions. [2020-09-04 17:45:07,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-04 17:45:07,744 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 158 [2020-09-04 17:45:07,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:07,746 INFO L225 Difference]: With dead ends: 323 [2020-09-04 17:45:07,746 INFO L226 Difference]: Without dead ends: 182 [2020-09-04 17:45:07,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=220, Invalid=3440, Unknown=0, NotChecked=0, Total=3660 [2020-09-04 17:45:07,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-09-04 17:45:07,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 168. [2020-09-04 17:45:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-09-04 17:45:07,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 170 transitions. [2020-09-04 17:45:07,760 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 170 transitions. Word has length 158 [2020-09-04 17:45:07,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:07,760 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 170 transitions. [2020-09-04 17:45:07,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 17:45:07,760 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 170 transitions. [2020-09-04 17:45:07,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-09-04 17:45:07,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:07,762 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] [2020-09-04 17:45:07,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 17:45:07,762 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:07,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:07,763 INFO L82 PathProgramCache]: Analyzing trace with hash 895533463, now seen corresponding path program 15 times [2020-09-04 17:45:07,763 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:07,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353042684] [2020-09-04 17:45:07,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:07,851 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:08,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:08,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:08,913 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353042684] [2020-09-04 17:45:08,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:08,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-09-04 17:45:08,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607018465] [2020-09-04 17:45:08,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 17:45:08,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:08,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 17:45:08,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1042, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 17:45:08,915 INFO L87 Difference]: Start difference. First operand 168 states and 170 transitions. Second operand 34 states. [2020-09-04 17:45:11,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:11,965 INFO L93 Difference]: Finished difference Result 341 states and 346 transitions. [2020-09-04 17:45:11,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-04 17:45:11,966 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 167 [2020-09-04 17:45:11,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:11,968 INFO L225 Difference]: With dead ends: 341 [2020-09-04 17:45:11,968 INFO L226 Difference]: Without dead ends: 191 [2020-09-04 17:45:11,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=235, Invalid=3925, Unknown=0, NotChecked=0, Total=4160 [2020-09-04 17:45:11,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-09-04 17:45:11,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 177. [2020-09-04 17:45:11,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-04 17:45:11,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 179 transitions. [2020-09-04 17:45:11,977 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 179 transitions. Word has length 167 [2020-09-04 17:45:11,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:11,978 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 179 transitions. [2020-09-04 17:45:11,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 17:45:11,978 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 179 transitions. [2020-09-04 17:45:11,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-04 17:45:11,979 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:11,979 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] [2020-09-04 17:45:11,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 17:45:11,980 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:11,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:11,980 INFO L82 PathProgramCache]: Analyzing trace with hash -2140458156, now seen corresponding path program 16 times [2020-09-04 17:45:11,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:11,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509456035] [2020-09-04 17:45:11,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:12,020 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:13,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:13,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:13,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509456035] [2020-09-04 17:45:13,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:13,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-09-04 17:45:13,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872977664] [2020-09-04 17:45:13,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 17:45:13,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:13,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 17:45:13,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 17:45:13,268 INFO L87 Difference]: Start difference. First operand 177 states and 179 transitions. Second operand 36 states. [2020-09-04 17:45:16,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:16,726 INFO L93 Difference]: Finished difference Result 359 states and 364 transitions. [2020-09-04 17:45:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-04 17:45:16,728 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 176 [2020-09-04 17:45:16,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:16,730 INFO L225 Difference]: With dead ends: 359 [2020-09-04 17:45:16,730 INFO L226 Difference]: Without dead ends: 200 [2020-09-04 17:45:16,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=250, Invalid=4442, Unknown=0, NotChecked=0, Total=4692 [2020-09-04 17:45:16,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-04 17:45:16,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 186. [2020-09-04 17:45:16,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-09-04 17:45:16,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 188 transitions. [2020-09-04 17:45:16,742 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 188 transitions. Word has length 176 [2020-09-04 17:45:16,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:16,743 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 188 transitions. [2020-09-04 17:45:16,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 17:45:16,743 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 188 transitions. [2020-09-04 17:45:16,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-09-04 17:45:16,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:16,744 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] [2020-09-04 17:45:16,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 17:45:16,745 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:16,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:16,745 INFO L82 PathProgramCache]: Analyzing trace with hash -976722377, now seen corresponding path program 17 times [2020-09-04 17:45:16,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:16,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860130016] [2020-09-04 17:45:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:16,830 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:18,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:18,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:18,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860130016] [2020-09-04 17:45:18,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:18,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-09-04 17:45:18,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362482080] [2020-09-04 17:45:18,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 17:45:18,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:18,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 17:45:18,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1316, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 17:45:18,221 INFO L87 Difference]: Start difference. First operand 186 states and 188 transitions. Second operand 38 states. [2020-09-04 17:45:22,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:22,010 INFO L93 Difference]: Finished difference Result 377 states and 382 transitions. [2020-09-04 17:45:22,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-09-04 17:45:22,011 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 185 [2020-09-04 17:45:22,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:22,013 INFO L225 Difference]: With dead ends: 377 [2020-09-04 17:45:22,013 INFO L226 Difference]: Without dead ends: 209 [2020-09-04 17:45:22,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=265, Invalid=4991, Unknown=0, NotChecked=0, Total=5256 [2020-09-04 17:45:22,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-09-04 17:45:22,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 195. [2020-09-04 17:45:22,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-09-04 17:45:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2020-09-04 17:45:22,024 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 185 [2020-09-04 17:45:22,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:22,025 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2020-09-04 17:45:22,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 17:45:22,025 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2020-09-04 17:45:22,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-09-04 17:45:22,026 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:22,026 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] [2020-09-04 17:45:22,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 17:45:22,027 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:22,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:22,027 INFO L82 PathProgramCache]: Analyzing trace with hash 776127156, now seen corresponding path program 18 times [2020-09-04 17:45:22,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:22,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917844853] [2020-09-04 17:45:22,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:22,112 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:23,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:23,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:23,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917844853] [2020-09-04 17:45:23,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:23,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-09-04 17:45:23,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654337901] [2020-09-04 17:45:23,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 17:45:23,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:23,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 17:45:23,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 17:45:23,590 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 40 states. [2020-09-04 17:45:27,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:27,826 INFO L93 Difference]: Finished difference Result 395 states and 400 transitions. [2020-09-04 17:45:27,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-09-04 17:45:27,831 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 194 [2020-09-04 17:45:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:27,832 INFO L225 Difference]: With dead ends: 395 [2020-09-04 17:45:27,833 INFO L226 Difference]: Without dead ends: 218 [2020-09-04 17:45:27,835 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=280, Invalid=5572, Unknown=0, NotChecked=0, Total=5852 [2020-09-04 17:45:27,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-09-04 17:45:27,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 204. [2020-09-04 17:45:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-09-04 17:45:27,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 206 transitions. [2020-09-04 17:45:27,846 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 206 transitions. Word has length 194 [2020-09-04 17:45:27,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:27,847 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 206 transitions. [2020-09-04 17:45:27,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 17:45:27,847 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 206 transitions. [2020-09-04 17:45:27,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-09-04 17:45:27,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:27,848 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] [2020-09-04 17:45:27,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 17:45:27,849 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:27,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:27,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1535910615, now seen corresponding path program 19 times [2020-09-04 17:45:27,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:27,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591504798] [2020-09-04 17:45:27,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:27,944 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:27,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:29,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:29,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591504798] [2020-09-04 17:45:29,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:29,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-09-04 17:45:29,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766123013] [2020-09-04 17:45:29,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 17:45:29,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:29,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 17:45:29,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1622, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 17:45:29,620 INFO L87 Difference]: Start difference. First operand 204 states and 206 transitions. Second operand 42 states. [2020-09-04 17:45:34,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:34,345 INFO L93 Difference]: Finished difference Result 413 states and 418 transitions. [2020-09-04 17:45:34,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-09-04 17:45:34,346 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 203 [2020-09-04 17:45:34,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:34,348 INFO L225 Difference]: With dead ends: 413 [2020-09-04 17:45:34,348 INFO L226 Difference]: Without dead ends: 227 [2020-09-04 17:45:34,351 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=295, Invalid=6185, Unknown=0, NotChecked=0, Total=6480 [2020-09-04 17:45:34,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-09-04 17:45:34,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 213. [2020-09-04 17:45:34,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-09-04 17:45:34,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 215 transitions. [2020-09-04 17:45:34,361 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 215 transitions. Word has length 203 [2020-09-04 17:45:34,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:34,361 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 215 transitions. [2020-09-04 17:45:34,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 17:45:34,362 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 215 transitions. [2020-09-04 17:45:34,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-09-04 17:45:34,363 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:34,363 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] [2020-09-04 17:45:34,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-04 17:45:34,363 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:34,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:34,364 INFO L82 PathProgramCache]: Analyzing trace with hash 14236180, now seen corresponding path program 20 times [2020-09-04 17:45:34,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:34,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323805199] [2020-09-04 17:45:34,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:34,545 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:34,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:36,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:36,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:36,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323805199] [2020-09-04 17:45:36,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:36,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-09-04 17:45:36,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081456193] [2020-09-04 17:45:36,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 17:45:36,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:36,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 17:45:36,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 17:45:36,378 INFO L87 Difference]: Start difference. First operand 213 states and 215 transitions. Second operand 44 states. [2020-09-04 17:45:41,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:41,562 INFO L93 Difference]: Finished difference Result 431 states and 436 transitions. [2020-09-04 17:45:41,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-09-04 17:45:41,565 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 212 [2020-09-04 17:45:41,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:41,567 INFO L225 Difference]: With dead ends: 431 [2020-09-04 17:45:41,567 INFO L226 Difference]: Without dead ends: 236 [2020-09-04 17:45:41,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=310, Invalid=6830, Unknown=0, NotChecked=0, Total=7140 [2020-09-04 17:45:41,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-09-04 17:45:41,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 222. [2020-09-04 17:45:41,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-09-04 17:45:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 224 transitions. [2020-09-04 17:45:41,581 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 224 transitions. Word has length 212 [2020-09-04 17:45:41,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:41,582 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 224 transitions. [2020-09-04 17:45:41,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 17:45:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 224 transitions. [2020-09-04 17:45:41,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-09-04 17:45:41,583 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:41,583 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] [2020-09-04 17:45:41,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-04 17:45:41,584 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:41,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:41,584 INFO L82 PathProgramCache]: Analyzing trace with hash -791283849, now seen corresponding path program 21 times [2020-09-04 17:45:41,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:41,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237233261] [2020-09-04 17:45:41,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:41,745 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:43,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:43,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:43,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237233261] [2020-09-04 17:45:43,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:43,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-09-04 17:45:43,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207074249] [2020-09-04 17:45:43,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-04 17:45:43,722 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:43,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-04 17:45:43,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1960, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 17:45:43,723 INFO L87 Difference]: Start difference. First operand 222 states and 224 transitions. Second operand 46 states. [2020-09-04 17:45:49,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:49,473 INFO L93 Difference]: Finished difference Result 449 states and 454 transitions. [2020-09-04 17:45:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-09-04 17:45:49,473 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 221 [2020-09-04 17:45:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:49,475 INFO L225 Difference]: With dead ends: 449 [2020-09-04 17:45:49,475 INFO L226 Difference]: Without dead ends: 245 [2020-09-04 17:45:49,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=325, Invalid=7507, Unknown=0, NotChecked=0, Total=7832 [2020-09-04 17:45:49,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-04 17:45:49,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 231. [2020-09-04 17:45:49,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-09-04 17:45:49,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2020-09-04 17:45:49,488 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 221 [2020-09-04 17:45:49,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:49,488 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2020-09-04 17:45:49,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-04 17:45:49,489 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2020-09-04 17:45:49,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-09-04 17:45:49,490 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:49,490 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] [2020-09-04 17:45:49,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-04 17:45:49,490 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:49,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:49,491 INFO L82 PathProgramCache]: Analyzing trace with hash -314271372, now seen corresponding path program 22 times [2020-09-04 17:45:49,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:49,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308632567] [2020-09-04 17:45:49,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:49,567 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:51,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:51,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308632567] [2020-09-04 17:45:51,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:51,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-09-04 17:45:51,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488950425] [2020-09-04 17:45:51,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-04 17:45:51,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:51,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-04 17:45:51,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 17:45:51,792 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 48 states. [2020-09-04 17:45:58,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:58,041 INFO L93 Difference]: Finished difference Result 467 states and 472 transitions. [2020-09-04 17:45:58,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-09-04 17:45:58,041 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 230 [2020-09-04 17:45:58,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:58,043 INFO L225 Difference]: With dead ends: 467 [2020-09-04 17:45:58,043 INFO L226 Difference]: Without dead ends: 254 [2020-09-04 17:45:58,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=340, Invalid=8216, Unknown=0, NotChecked=0, Total=8556 [2020-09-04 17:45:58,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-04 17:45:58,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 240. [2020-09-04 17:45:58,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-09-04 17:45:58,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 242 transitions. [2020-09-04 17:45:58,056 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 242 transitions. Word has length 230 [2020-09-04 17:45:58,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:58,056 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 242 transitions. [2020-09-04 17:45:58,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-09-04 17:45:58,057 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 242 transitions. [2020-09-04 17:45:58,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-09-04 17:45:58,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:58,058 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] [2020-09-04 17:45:58,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-04 17:45:58,059 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:58,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:58,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1991252969, now seen corresponding path program 23 times [2020-09-04 17:45:58,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:58,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832299131] [2020-09-04 17:45:58,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:58,187 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:00,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:00,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832299131] [2020-09-04 17:46:00,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:00,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-09-04 17:46:00,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990827537] [2020-09-04 17:46:00,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-09-04 17:46:00,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:00,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-09-04 17:46:00,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2020-09-04 17:46:00,626 INFO L87 Difference]: Start difference. First operand 240 states and 242 transitions. Second operand 50 states. [2020-09-04 17:46:07,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:07,509 INFO L93 Difference]: Finished difference Result 485 states and 490 transitions. [2020-09-04 17:46:07,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-09-04 17:46:07,510 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 239 [2020-09-04 17:46:07,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:07,512 INFO L225 Difference]: With dead ends: 485 [2020-09-04 17:46:07,512 INFO L226 Difference]: Without dead ends: 263 [2020-09-04 17:46:07,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=355, Invalid=8957, Unknown=0, NotChecked=0, Total=9312 [2020-09-04 17:46:07,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-09-04 17:46:07,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 249. [2020-09-04 17:46:07,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-09-04 17:46:07,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 251 transitions. [2020-09-04 17:46:07,525 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 251 transitions. Word has length 239 [2020-09-04 17:46:07,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:07,526 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 251 transitions. [2020-09-04 17:46:07,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-09-04 17:46:07,526 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 251 transitions. [2020-09-04 17:46:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-09-04 17:46:07,527 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:07,528 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] [2020-09-04 17:46:07,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-04 17:46:07,528 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:07,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:07,528 INFO L82 PathProgramCache]: Analyzing trace with hash 253419732, now seen corresponding path program 24 times [2020-09-04 17:46:07,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:07,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081801844] [2020-09-04 17:46:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:07,661 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:10,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:10,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:10,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:10,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081801844] [2020-09-04 17:46:10,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:10,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-09-04 17:46:10,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069800641] [2020-09-04 17:46:10,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-09-04 17:46:10,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:10,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-09-04 17:46:10,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 17:46:10,280 INFO L87 Difference]: Start difference. First operand 249 states and 251 transitions. Second operand 52 states. [2020-09-04 17:46:17,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:17,839 INFO L93 Difference]: Finished difference Result 503 states and 508 transitions. [2020-09-04 17:46:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-09-04 17:46:17,839 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 248 [2020-09-04 17:46:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:17,841 INFO L225 Difference]: With dead ends: 503 [2020-09-04 17:46:17,842 INFO L226 Difference]: Without dead ends: 272 [2020-09-04 17:46:17,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=370, Invalid=9730, Unknown=0, NotChecked=0, Total=10100 [2020-09-04 17:46:17,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-09-04 17:46:17,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 258. [2020-09-04 17:46:17,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-09-04 17:46:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 260 transitions. [2020-09-04 17:46:17,856 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 260 transitions. Word has length 248 [2020-09-04 17:46:17,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:17,856 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 260 transitions. [2020-09-04 17:46:17,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-09-04 17:46:17,856 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 260 transitions. [2020-09-04 17:46:17,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-09-04 17:46:17,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:17,858 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] [2020-09-04 17:46:17,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-04 17:46:17,858 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:17,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:17,859 INFO L82 PathProgramCache]: Analyzing trace with hash 304343223, now seen corresponding path program 25 times [2020-09-04 17:46:17,859 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:17,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743950436] [2020-09-04 17:46:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:18,109 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:20,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:20,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743950436] [2020-09-04 17:46:20,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:20,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-09-04 17:46:20,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828909797] [2020-09-04 17:46:20,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-09-04 17:46:20,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:20,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-09-04 17:46:20,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2732, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 17:46:20,911 INFO L87 Difference]: Start difference. First operand 258 states and 260 transitions. Second operand 54 states. [2020-09-04 17:46:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:28,978 INFO L93 Difference]: Finished difference Result 521 states and 526 transitions. [2020-09-04 17:46:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-09-04 17:46:28,978 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 257 [2020-09-04 17:46:28,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:28,980 INFO L225 Difference]: With dead ends: 521 [2020-09-04 17:46:28,980 INFO L226 Difference]: Without dead ends: 281 [2020-09-04 17:46:28,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=385, Invalid=10535, Unknown=0, NotChecked=0, Total=10920 [2020-09-04 17:46:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-09-04 17:46:28,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 267. [2020-09-04 17:46:28,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-09-04 17:46:28,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 269 transitions. [2020-09-04 17:46:28,994 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 269 transitions. Word has length 257 [2020-09-04 17:46:28,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:28,994 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 269 transitions. [2020-09-04 17:46:28,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-09-04 17:46:28,994 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 269 transitions. [2020-09-04 17:46:28,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-09-04 17:46:28,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:28,996 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] [2020-09-04 17:46:28,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-04 17:46:28,997 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:28,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:28,997 INFO L82 PathProgramCache]: Analyzing trace with hash 141692980, now seen corresponding path program 26 times [2020-09-04 17:46:28,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:28,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515103225] [2020-09-04 17:46:28,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:29,185 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:32,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:32,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:32,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515103225] [2020-09-04 17:46:32,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:32,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-09-04 17:46:32,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391818456] [2020-09-04 17:46:32,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-09-04 17:46:32,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:32,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-09-04 17:46:32,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2945, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 17:46:32,198 INFO L87 Difference]: Start difference. First operand 267 states and 269 transitions. Second operand 56 states. [2020-09-04 17:46:41,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:41,146 INFO L93 Difference]: Finished difference Result 539 states and 544 transitions. [2020-09-04 17:46:41,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-09-04 17:46:41,147 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 266 [2020-09-04 17:46:41,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:41,149 INFO L225 Difference]: With dead ends: 539 [2020-09-04 17:46:41,149 INFO L226 Difference]: Without dead ends: 290 [2020-09-04 17:46:41,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=400, Invalid=11372, Unknown=0, NotChecked=0, Total=11772 [2020-09-04 17:46:41,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-04 17:46:41,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 276. [2020-09-04 17:46:41,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-09-04 17:46:41,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 278 transitions. [2020-09-04 17:46:41,162 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 278 transitions. Word has length 266 [2020-09-04 17:46:41,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:41,163 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 278 transitions. [2020-09-04 17:46:41,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-09-04 17:46:41,163 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 278 transitions. [2020-09-04 17:46:41,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-09-04 17:46:41,165 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:41,165 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] [2020-09-04 17:46:41,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-04 17:46:41,165 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:41,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:41,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1040448169, now seen corresponding path program 27 times [2020-09-04 17:46:41,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:41,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855034693] [2020-09-04 17:46:41,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:41,301 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:44,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:44,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:44,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855034693] [2020-09-04 17:46:44,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:44,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2020-09-04 17:46:44,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042871027] [2020-09-04 17:46:44,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-09-04 17:46:44,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:44,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-09-04 17:46:44,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=3166, Unknown=0, NotChecked=0, Total=3306 [2020-09-04 17:46:44,498 INFO L87 Difference]: Start difference. First operand 276 states and 278 transitions. Second operand 58 states. [2020-09-04 17:46:54,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:54,262 INFO L93 Difference]: Finished difference Result 557 states and 562 transitions. [2020-09-04 17:46:54,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-09-04 17:46:54,263 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 275 [2020-09-04 17:46:54,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:54,264 INFO L225 Difference]: With dead ends: 557 [2020-09-04 17:46:54,264 INFO L226 Difference]: Without dead ends: 299 [2020-09-04 17:46:54,266 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=415, Invalid=12241, Unknown=0, NotChecked=0, Total=12656 [2020-09-04 17:46:54,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-09-04 17:46:54,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 285. [2020-09-04 17:46:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-09-04 17:46:54,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 287 transitions. [2020-09-04 17:46:54,277 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 287 transitions. Word has length 275 [2020-09-04 17:46:54,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:54,278 INFO L479 AbstractCegarLoop]: Abstraction has 285 states and 287 transitions. [2020-09-04 17:46:54,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-09-04 17:46:54,278 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 287 transitions. [2020-09-04 17:46:54,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-09-04 17:46:54,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:54,280 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] [2020-09-04 17:46:54,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-04 17:46:54,280 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:54,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:54,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1642080148, now seen corresponding path program 28 times [2020-09-04 17:46:54,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:54,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829918645] [2020-09-04 17:46:54,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:54,421 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:57,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:57,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829918645] [2020-09-04 17:46:57,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:57,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-09-04 17:46:57,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120686472] [2020-09-04 17:46:57,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-09-04 17:46:57,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:57,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-09-04 17:46:57,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=3395, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 17:46:57,922 INFO L87 Difference]: Start difference. First operand 285 states and 287 transitions. Second operand 60 states. [2020-09-04 17:47:08,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:08,429 INFO L93 Difference]: Finished difference Result 575 states and 580 transitions. [2020-09-04 17:47:08,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-09-04 17:47:08,430 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 284 [2020-09-04 17:47:08,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:08,431 INFO L225 Difference]: With dead ends: 575 [2020-09-04 17:47:08,431 INFO L226 Difference]: Without dead ends: 308 [2020-09-04 17:47:08,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=430, Invalid=13142, Unknown=0, NotChecked=0, Total=13572 [2020-09-04 17:47:08,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-09-04 17:47:08,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 294. [2020-09-04 17:47:08,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-09-04 17:47:08,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 296 transitions. [2020-09-04 17:47:08,446 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 296 transitions. Word has length 284 [2020-09-04 17:47:08,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:08,447 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 296 transitions. [2020-09-04 17:47:08,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-09-04 17:47:08,447 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 296 transitions. [2020-09-04 17:47:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-09-04 17:47:08,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:08,449 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] [2020-09-04 17:47:08,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-04 17:47:08,449 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:08,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:08,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1493318135, now seen corresponding path program 29 times [2020-09-04 17:47:08,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:08,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188273375] [2020-09-04 17:47:08,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:08,652 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:12,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:47:12,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188273375] [2020-09-04 17:47:12,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:12,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2020-09-04 17:47:12,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296519123] [2020-09-04 17:47:12,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-09-04 17:47:12,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:12,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-09-04 17:47:12,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=3632, Unknown=0, NotChecked=0, Total=3782 [2020-09-04 17:47:12,448 INFO L87 Difference]: Start difference. First operand 294 states and 296 transitions. Second operand 62 states. [2020-09-04 17:47:23,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:23,851 INFO L93 Difference]: Finished difference Result 593 states and 598 transitions. [2020-09-04 17:47:23,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-09-04 17:47:23,852 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 293 [2020-09-04 17:47:23,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:23,853 INFO L225 Difference]: With dead ends: 593 [2020-09-04 17:47:23,853 INFO L226 Difference]: Without dead ends: 317 [2020-09-04 17:47:23,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=445, Invalid=14075, Unknown=0, NotChecked=0, Total=14520 [2020-09-04 17:47:23,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-09-04 17:47:23,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 303. [2020-09-04 17:47:23,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 303 states. [2020-09-04 17:47:23,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 305 transitions. [2020-09-04 17:47:23,868 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 305 transitions. Word has length 293 [2020-09-04 17:47:23,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:23,868 INFO L479 AbstractCegarLoop]: Abstraction has 303 states and 305 transitions. [2020-09-04 17:47:23,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-09-04 17:47:23,868 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 305 transitions. [2020-09-04 17:47:23,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2020-09-04 17:47:23,870 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:23,870 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] [2020-09-04 17:47:23,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-04 17:47:23,871 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:23,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:23,871 INFO L82 PathProgramCache]: Analyzing trace with hash -361027852, now seen corresponding path program 30 times [2020-09-04 17:47:23,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:23,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973254284] [2020-09-04 17:47:23,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:24,073 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:24,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:28,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:28,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:47:28,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973254284] [2020-09-04 17:47:28,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:28,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-09-04 17:47:28,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731231034] [2020-09-04 17:47:28,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-09-04 17:47:28,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:28,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-09-04 17:47:28,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=3877, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 17:47:28,239 INFO L87 Difference]: Start difference. First operand 303 states and 305 transitions. Second operand 64 states. [2020-09-04 17:47:40,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:40,663 INFO L93 Difference]: Finished difference Result 611 states and 616 transitions. [2020-09-04 17:47:40,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-09-04 17:47:40,663 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 302 [2020-09-04 17:47:40,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:40,665 INFO L225 Difference]: With dead ends: 611 [2020-09-04 17:47:40,665 INFO L226 Difference]: Without dead ends: 326 [2020-09-04 17:47:40,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=460, Invalid=15040, Unknown=0, NotChecked=0, Total=15500 [2020-09-04 17:47:40,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2020-09-04 17:47:40,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 312. [2020-09-04 17:47:40,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-09-04 17:47:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 314 transitions. [2020-09-04 17:47:40,679 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 314 transitions. Word has length 302 [2020-09-04 17:47:40,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:40,679 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 314 transitions. [2020-09-04 17:47:40,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-09-04 17:47:40,680 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 314 transitions. [2020-09-04 17:47:40,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-09-04 17:47:40,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:40,682 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] [2020-09-04 17:47:40,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-04 17:47:40,682 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:40,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:40,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1595898217, now seen corresponding path program 31 times [2020-09-04 17:47:40,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:40,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952928385] [2020-09-04 17:47:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:40,932 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:45,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:47:45,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952928385] [2020-09-04 17:47:45,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:45,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2020-09-04 17:47:45,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307523943] [2020-09-04 17:47:45,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-09-04 17:47:45,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:45,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-09-04 17:47:45,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=4130, Unknown=0, NotChecked=0, Total=4290 [2020-09-04 17:47:45,298 INFO L87 Difference]: Start difference. First operand 312 states and 314 transitions. Second operand 66 states. [2020-09-04 17:47:58,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:58,695 INFO L93 Difference]: Finished difference Result 629 states and 634 transitions. [2020-09-04 17:47:58,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-09-04 17:47:58,696 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 311 [2020-09-04 17:47:58,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:58,698 INFO L225 Difference]: With dead ends: 629 [2020-09-04 17:47:58,699 INFO L226 Difference]: Without dead ends: 335 [2020-09-04 17:47:58,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=475, Invalid=16037, Unknown=0, NotChecked=0, Total=16512 [2020-09-04 17:47:58,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-09-04 17:47:58,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 321. [2020-09-04 17:47:58,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-09-04 17:47:58,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 323 transitions. [2020-09-04 17:47:58,712 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 323 transitions. Word has length 311 [2020-09-04 17:47:58,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:58,713 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 323 transitions. [2020-09-04 17:47:58,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-09-04 17:47:58,713 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 323 transitions. [2020-09-04 17:47:58,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-09-04 17:47:58,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:58,715 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] [2020-09-04 17:47:58,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-04 17:47:58,715 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:58,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:58,716 INFO L82 PathProgramCache]: Analyzing trace with hash 400100948, now seen corresponding path program 32 times [2020-09-04 17:47:58,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:58,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136448610] [2020-09-04 17:47:58,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:58,947 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:03,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:48:03,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136448610] [2020-09-04 17:48:03,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:03,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2020-09-04 17:48:03,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478262183] [2020-09-04 17:48:03,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-09-04 17:48:03,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:03,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-09-04 17:48:03,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=4391, Unknown=0, NotChecked=0, Total=4556 [2020-09-04 17:48:03,600 INFO L87 Difference]: Start difference. First operand 321 states and 323 transitions. Second operand 68 states. [2020-09-04 17:48:17,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:17,820 INFO L93 Difference]: Finished difference Result 647 states and 652 transitions. [2020-09-04 17:48:17,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-09-04 17:48:17,821 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 320 [2020-09-04 17:48:17,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:17,823 INFO L225 Difference]: With dead ends: 647 [2020-09-04 17:48:17,823 INFO L226 Difference]: Without dead ends: 344 [2020-09-04 17:48:17,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=490, Invalid=17066, Unknown=0, NotChecked=0, Total=17556 [2020-09-04 17:48:17,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-09-04 17:48:17,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 330. [2020-09-04 17:48:17,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-09-04 17:48:17,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 332 transitions. [2020-09-04 17:48:17,838 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 332 transitions. Word has length 320 [2020-09-04 17:48:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:17,838 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 332 transitions. [2020-09-04 17:48:17,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-09-04 17:48:17,838 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 332 transitions. [2020-09-04 17:48:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-09-04 17:48:17,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:17,841 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] [2020-09-04 17:48:17,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-04 17:48:17,841 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:17,841 INFO L82 PathProgramCache]: Analyzing trace with hash 213969719, now seen corresponding path program 33 times [2020-09-04 17:48:17,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:17,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891859710] [2020-09-04 17:48:17,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:18,184 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:23,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:23,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:48:23,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891859710] [2020-09-04 17:48:23,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:23,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2020-09-04 17:48:23,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972535693] [2020-09-04 17:48:23,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-09-04 17:48:23,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:23,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-09-04 17:48:23,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=4660, Unknown=0, NotChecked=0, Total=4830 [2020-09-04 17:48:23,184 INFO L87 Difference]: Start difference. First operand 330 states and 332 transitions. Second operand 70 states. [2020-09-04 17:48:38,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:38,517 INFO L93 Difference]: Finished difference Result 665 states and 670 transitions. [2020-09-04 17:48:38,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-09-04 17:48:38,518 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 329 [2020-09-04 17:48:38,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:38,519 INFO L225 Difference]: With dead ends: 665 [2020-09-04 17:48:38,519 INFO L226 Difference]: Without dead ends: 353 [2020-09-04 17:48:38,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=505, Invalid=18127, Unknown=0, NotChecked=0, Total=18632 [2020-09-04 17:48:38,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-09-04 17:48:38,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 339. [2020-09-04 17:48:38,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-09-04 17:48:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 341 transitions. [2020-09-04 17:48:38,535 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 341 transitions. Word has length 329 [2020-09-04 17:48:38,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:38,536 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 341 transitions. [2020-09-04 17:48:38,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-09-04 17:48:38,536 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 341 transitions. [2020-09-04 17:48:38,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-09-04 17:48:38,538 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:38,539 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] [2020-09-04 17:48:38,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-04 17:48:38,539 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:38,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:38,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1712315828, now seen corresponding path program 34 times [2020-09-04 17:48:38,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:38,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564013158] [2020-09-04 17:48:38,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:38,685 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:43,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:43,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:48:43,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564013158] [2020-09-04 17:48:43,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:43,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2020-09-04 17:48:43,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920287035] [2020-09-04 17:48:43,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-09-04 17:48:43,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:43,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-09-04 17:48:43,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=4937, Unknown=0, NotChecked=0, Total=5112 [2020-09-04 17:48:43,990 INFO L87 Difference]: Start difference. First operand 339 states and 341 transitions. Second operand 72 states. [2020-09-04 17:49:00,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:00,531 INFO L93 Difference]: Finished difference Result 683 states and 688 transitions. [2020-09-04 17:49:00,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-09-04 17:49:00,532 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 338 [2020-09-04 17:49:00,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:00,534 INFO L225 Difference]: With dead ends: 683 [2020-09-04 17:49:00,534 INFO L226 Difference]: Without dead ends: 362 [2020-09-04 17:49:00,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=520, Invalid=19220, Unknown=0, NotChecked=0, Total=19740 [2020-09-04 17:49:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-09-04 17:49:00,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 348. [2020-09-04 17:49:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-09-04 17:49:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 350 transitions. [2020-09-04 17:49:00,549 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 350 transitions. Word has length 338 [2020-09-04 17:49:00,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:00,549 INFO L479 AbstractCegarLoop]: Abstraction has 348 states and 350 transitions. [2020-09-04 17:49:00,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-09-04 17:49:00,550 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 350 transitions. [2020-09-04 17:49:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-09-04 17:49:00,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:00,552 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] [2020-09-04 17:49:00,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-04 17:49:00,552 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:00,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:00,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1498245079, now seen corresponding path program 35 times [2020-09-04 17:49:00,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:00,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700705293] [2020-09-04 17:49:00,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:01,012 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:01,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:06,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:06,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:06,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700705293] [2020-09-04 17:49:06,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:06,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2020-09-04 17:49:06,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893829838] [2020-09-04 17:49:06,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-09-04 17:49:06,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:06,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-09-04 17:49:06,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=5222, Unknown=0, NotChecked=0, Total=5402 [2020-09-04 17:49:06,637 INFO L87 Difference]: Start difference. First operand 348 states and 350 transitions. Second operand 74 states. [2020-09-04 17:49:24,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:24,288 INFO L93 Difference]: Finished difference Result 701 states and 706 transitions. [2020-09-04 17:49:24,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2020-09-04 17:49:24,289 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 347 [2020-09-04 17:49:24,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:24,291 INFO L225 Difference]: With dead ends: 701 [2020-09-04 17:49:24,291 INFO L226 Difference]: Without dead ends: 371 [2020-09-04 17:49:24,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=535, Invalid=20345, Unknown=0, NotChecked=0, Total=20880 [2020-09-04 17:49:24,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2020-09-04 17:49:24,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 357. [2020-09-04 17:49:24,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-09-04 17:49:24,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 359 transitions. [2020-09-04 17:49:24,306 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 359 transitions. Word has length 347 [2020-09-04 17:49:24,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:24,306 INFO L479 AbstractCegarLoop]: Abstraction has 357 states and 359 transitions. [2020-09-04 17:49:24,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-09-04 17:49:24,307 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 359 transitions. [2020-09-04 17:49:24,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2020-09-04 17:49:24,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:24,309 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] [2020-09-04 17:49:24,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-04 17:49:24,309 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:24,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:24,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1212836588, now seen corresponding path program 36 times [2020-09-04 17:49:24,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:24,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139096915] [2020-09-04 17:49:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:24,442 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:30,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:30,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:30,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139096915] [2020-09-04 17:49:30,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:30,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2020-09-04 17:49:30,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850149175] [2020-09-04 17:49:30,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-09-04 17:49:30,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:30,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-09-04 17:49:30,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=5515, Unknown=0, NotChecked=0, Total=5700 [2020-09-04 17:49:30,529 INFO L87 Difference]: Start difference. First operand 357 states and 359 transitions. Second operand 76 states. [2020-09-04 17:49:49,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:49,763 INFO L93 Difference]: Finished difference Result 719 states and 724 transitions. [2020-09-04 17:49:49,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-09-04 17:49:49,764 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 356 [2020-09-04 17:49:49,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:49,765 INFO L225 Difference]: With dead ends: 719 [2020-09-04 17:49:49,765 INFO L226 Difference]: Without dead ends: 380 [2020-09-04 17:49:49,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=550, Invalid=21502, Unknown=0, NotChecked=0, Total=22052 [2020-09-04 17:49:49,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-09-04 17:49:49,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 366. [2020-09-04 17:49:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-09-04 17:49:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 368 transitions. [2020-09-04 17:49:49,784 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 368 transitions. Word has length 356 [2020-09-04 17:49:49,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:49,785 INFO L479 AbstractCegarLoop]: Abstraction has 366 states and 368 transitions. [2020-09-04 17:49:49,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-09-04 17:49:49,785 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 368 transitions. [2020-09-04 17:49:49,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-09-04 17:49:49,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:49,788 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] [2020-09-04 17:49:49,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-04 17:49:49,788 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:49,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:49,788 INFO L82 PathProgramCache]: Analyzing trace with hash 749730935, now seen corresponding path program 37 times [2020-09-04 17:49:49,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:49,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649751373] [2020-09-04 17:49:49,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:50,008 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:56,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:56,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:49:56,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649751373] [2020-09-04 17:49:56,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:56,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2020-09-04 17:49:56,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551883927] [2020-09-04 17:49:56,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-09-04 17:49:56,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:56,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-09-04 17:49:56,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=5816, Unknown=0, NotChecked=0, Total=6006 [2020-09-04 17:49:56,583 INFO L87 Difference]: Start difference. First operand 366 states and 368 transitions. Second operand 78 states. [2020-09-04 17:50:17,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:50:17,442 INFO L93 Difference]: Finished difference Result 737 states and 742 transitions. [2020-09-04 17:50:17,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2020-09-04 17:50:17,443 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 365 [2020-09-04 17:50:17,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:50:17,445 INFO L225 Difference]: With dead ends: 737 [2020-09-04 17:50:17,445 INFO L226 Difference]: Without dead ends: 389 [2020-09-04 17:50:17,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=565, Invalid=22691, Unknown=0, NotChecked=0, Total=23256 [2020-09-04 17:50:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2020-09-04 17:50:17,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 375. [2020-09-04 17:50:17,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 375 states. [2020-09-04 17:50:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 377 transitions. [2020-09-04 17:50:17,460 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 377 transitions. Word has length 365 [2020-09-04 17:50:17,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:50:17,461 INFO L479 AbstractCegarLoop]: Abstraction has 375 states and 377 transitions. [2020-09-04 17:50:17,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-09-04 17:50:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 377 transitions. [2020-09-04 17:50:17,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-09-04 17:50:17,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:50:17,464 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] [2020-09-04 17:50:17,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-04 17:50:17,464 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:50:17,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:50:17,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1243597708, now seen corresponding path program 38 times [2020-09-04 17:50:17,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:50:17,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825632032] [2020-09-04 17:50:17,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:50:17,788 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:50:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:24,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:50:24,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:50:24,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825632032] [2020-09-04 17:50:24,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:50:24,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2020-09-04 17:50:24,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037287100] [2020-09-04 17:50:24,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-09-04 17:50:24,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:50:24,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-09-04 17:50:24,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=6125, Unknown=0, NotChecked=0, Total=6320 [2020-09-04 17:50:24,752 INFO L87 Difference]: Start difference. First operand 375 states and 377 transitions. Second operand 80 states. [2020-09-04 17:50:46,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:50:46,593 INFO L93 Difference]: Finished difference Result 755 states and 760 transitions. [2020-09-04 17:50:46,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-09-04 17:50:46,594 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 374 [2020-09-04 17:50:46,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:50:46,595 INFO L225 Difference]: With dead ends: 755 [2020-09-04 17:50:46,595 INFO L226 Difference]: Without dead ends: 398 [2020-09-04 17:50:46,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=580, Invalid=23912, Unknown=0, NotChecked=0, Total=24492 [2020-09-04 17:50:46,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-09-04 17:50:46,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 384. [2020-09-04 17:50:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-09-04 17:50:46,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 386 transitions. [2020-09-04 17:50:46,611 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 386 transitions. Word has length 374 [2020-09-04 17:50:46,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:50:46,611 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 386 transitions. [2020-09-04 17:50:46,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-09-04 17:50:46,612 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 386 transitions. [2020-09-04 17:50:46,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2020-09-04 17:50:46,614 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:50:46,614 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] [2020-09-04 17:50:46,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-04 17:50:46,614 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:50:46,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:50:46,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1231902441, now seen corresponding path program 39 times [2020-09-04 17:50:46,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:50:46,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600715725] [2020-09-04 17:50:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:50:46,890 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:50:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:54,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:50:54,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:50:54,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600715725] [2020-09-04 17:50:54,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:50:54,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2020-09-04 17:50:54,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047482614] [2020-09-04 17:50:54,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-09-04 17:50:54,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:50:54,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-09-04 17:50:54,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=6442, Unknown=0, NotChecked=0, Total=6642 [2020-09-04 17:50:54,237 INFO L87 Difference]: Start difference. First operand 384 states and 386 transitions. Second operand 82 states. [2020-09-04 17:51:17,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:51:17,557 INFO L93 Difference]: Finished difference Result 773 states and 778 transitions. [2020-09-04 17:51:17,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2020-09-04 17:51:17,558 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 383 [2020-09-04 17:51:17,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:51:17,560 INFO L225 Difference]: With dead ends: 773 [2020-09-04 17:51:17,560 INFO L226 Difference]: Without dead ends: 407 [2020-09-04 17:51:17,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=595, Invalid=25165, Unknown=0, NotChecked=0, Total=25760 [2020-09-04 17:51:17,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-09-04 17:51:17,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 393. [2020-09-04 17:51:17,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-09-04 17:51:17,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 395 transitions. [2020-09-04 17:51:17,578 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 395 transitions. Word has length 383 [2020-09-04 17:51:17,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:51:17,579 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 395 transitions. [2020-09-04 17:51:17,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-09-04 17:51:17,579 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 395 transitions. [2020-09-04 17:51:17,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2020-09-04 17:51:17,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:51:17,582 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] [2020-09-04 17:51:17,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-09-04 17:51:17,582 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:51:17,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:51:17,583 INFO L82 PathProgramCache]: Analyzing trace with hash 807779284, now seen corresponding path program 40 times [2020-09-04 17:51:17,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:51:17,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952103650] [2020-09-04 17:51:17,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:51:17,884 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:51:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:51:25,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:51:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:51:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:51:25,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952103650] [2020-09-04 17:51:25,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:51:25,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2020-09-04 17:51:25,821 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627438564] [2020-09-04 17:51:25,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-09-04 17:51:25,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:51:25,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-09-04 17:51:25,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=6767, Unknown=0, NotChecked=0, Total=6972 [2020-09-04 17:51:25,823 INFO L87 Difference]: Start difference. First operand 393 states and 395 transitions. Second operand 84 states. [2020-09-04 17:51:51,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:51:51,088 INFO L93 Difference]: Finished difference Result 791 states and 796 transitions. [2020-09-04 17:51:51,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2020-09-04 17:51:51,089 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 392 [2020-09-04 17:51:51,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:51:51,091 INFO L225 Difference]: With dead ends: 791 [2020-09-04 17:51:51,091 INFO L226 Difference]: Without dead ends: 416 [2020-09-04 17:51:51,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=610, Invalid=26450, Unknown=0, NotChecked=0, Total=27060 [2020-09-04 17:51:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-09-04 17:51:51,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 402. [2020-09-04 17:51:51,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-09-04 17:51:51,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 404 transitions. [2020-09-04 17:51:51,107 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 404 transitions. Word has length 392 [2020-09-04 17:51:51,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:51:51,108 INFO L479 AbstractCegarLoop]: Abstraction has 402 states and 404 transitions. [2020-09-04 17:51:51,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-09-04 17:51:51,108 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 404 transitions. [2020-09-04 17:51:51,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-09-04 17:51:51,111 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:51:51,111 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] [2020-09-04 17:51:51,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-09-04 17:51:51,112 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:51:51,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:51:51,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1344236983, now seen corresponding path program 41 times [2020-09-04 17:51:51,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:51:51,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132318234] [2020-09-04 17:51:51,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:51:51,409 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:51:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:51:59,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:51:59,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:52:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:52:00,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132318234] [2020-09-04 17:52:00,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:52:00,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2020-09-04 17:52:00,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843002092] [2020-09-04 17:52:00,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-09-04 17:52:00,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:52:00,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-09-04 17:52:00,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=7100, Unknown=0, NotChecked=0, Total=7310 [2020-09-04 17:52:00,008 INFO L87 Difference]: Start difference. First operand 402 states and 404 transitions. Second operand 86 states. [2020-09-04 17:52:27,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:52:27,480 INFO L93 Difference]: Finished difference Result 809 states and 814 transitions. [2020-09-04 17:52:27,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2020-09-04 17:52:27,481 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 401 [2020-09-04 17:52:27,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:52:27,483 INFO L225 Difference]: With dead ends: 809 [2020-09-04 17:52:27,483 INFO L226 Difference]: Without dead ends: 425 [2020-09-04 17:52:27,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=625, Invalid=27767, Unknown=0, NotChecked=0, Total=28392 [2020-09-04 17:52:27,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2020-09-04 17:52:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 411. [2020-09-04 17:52:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-09-04 17:52:27,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 413 transitions. [2020-09-04 17:52:27,497 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 413 transitions. Word has length 401 [2020-09-04 17:52:27,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:52:27,498 INFO L479 AbstractCegarLoop]: Abstraction has 411 states and 413 transitions. [2020-09-04 17:52:27,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-09-04 17:52:27,498 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 413 transitions. [2020-09-04 17:52:27,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-09-04 17:52:27,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:52:27,501 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] [2020-09-04 17:52:27,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-09-04 17:52:27,501 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:52:27,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:52:27,502 INFO L82 PathProgramCache]: Analyzing trace with hash 2090609460, now seen corresponding path program 42 times [2020-09-04 17:52:27,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:52:27,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881801851] [2020-09-04 17:52:27,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:52:27,796 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:52:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:52:37,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:52:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:52:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:52:37,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881801851] [2020-09-04 17:52:37,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:52:37,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2020-09-04 17:52:37,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730445201] [2020-09-04 17:52:37,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-09-04 17:52:37,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:52:37,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-09-04 17:52:37,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=7441, Unknown=0, NotChecked=0, Total=7656 [2020-09-04 17:52:37,305 INFO L87 Difference]: Start difference. First operand 411 states and 413 transitions. Second operand 88 states. [2020-09-04 17:53:07,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:53:07,584 INFO L93 Difference]: Finished difference Result 827 states and 832 transitions. [2020-09-04 17:53:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-09-04 17:53:07,586 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 410 [2020-09-04 17:53:07,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:53:07,588 INFO L225 Difference]: With dead ends: 827 [2020-09-04 17:53:07,588 INFO L226 Difference]: Without dead ends: 434 [2020-09-04 17:53:07,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3571 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=640, Invalid=29116, Unknown=0, NotChecked=0, Total=29756 [2020-09-04 17:53:07,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-09-04 17:53:07,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 420. [2020-09-04 17:53:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-09-04 17:53:07,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 422 transitions. [2020-09-04 17:53:07,605 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 422 transitions. Word has length 410 [2020-09-04 17:53:07,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:53:07,605 INFO L479 AbstractCegarLoop]: Abstraction has 420 states and 422 transitions. [2020-09-04 17:53:07,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-09-04 17:53:07,605 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 422 transitions. [2020-09-04 17:53:07,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-09-04 17:53:07,608 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:53:07,608 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] [2020-09-04 17:53:07,608 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-09-04 17:53:07,609 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:53:07,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:53:07,609 INFO L82 PathProgramCache]: Analyzing trace with hash 469781079, now seen corresponding path program 43 times [2020-09-04 17:53:07,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:53:07,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435853744] [2020-09-04 17:53:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:53:07,866 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:53:07,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:53:18,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:53:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:53:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:53:18,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435853744] [2020-09-04 17:53:18,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:53:18,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2020-09-04 17:53:18,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637828562] [2020-09-04 17:53:18,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-09-04 17:53:18,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:53:18,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-09-04 17:53:18,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=7790, Unknown=0, NotChecked=0, Total=8010 [2020-09-04 17:53:18,461 INFO L87 Difference]: Start difference. First operand 420 states and 422 transitions. Second operand 90 states. [2020-09-04 17:53:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:53:52,703 INFO L93 Difference]: Finished difference Result 845 states and 850 transitions. [2020-09-04 17:53:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-09-04 17:53:52,706 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 419 [2020-09-04 17:53:52,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:53:52,708 INFO L225 Difference]: With dead ends: 845 [2020-09-04 17:53:52,708 INFO L226 Difference]: Without dead ends: 443 [2020-09-04 17:53:52,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=655, Invalid=30497, Unknown=0, NotChecked=0, Total=31152 [2020-09-04 17:53:52,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2020-09-04 17:53:52,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 429. [2020-09-04 17:53:52,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2020-09-04 17:53:52,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 431 transitions. [2020-09-04 17:53:52,722 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 431 transitions. Word has length 419 [2020-09-04 17:53:52,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:53:52,722 INFO L479 AbstractCegarLoop]: Abstraction has 429 states and 431 transitions. [2020-09-04 17:53:52,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-09-04 17:53:52,722 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 431 transitions. [2020-09-04 17:53:52,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2020-09-04 17:53:52,725 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:53:52,725 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] [2020-09-04 17:53:52,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-09-04 17:53:52,726 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:53:52,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:53:52,726 INFO L82 PathProgramCache]: Analyzing trace with hash -673611116, now seen corresponding path program 44 times [2020-09-04 17:53:52,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:53:52,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542626262] [2020-09-04 17:53:52,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:53:53,035 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:53:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:54:04,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:54:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:54:05,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:54:05,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542626262] [2020-09-04 17:54:05,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:54:05,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2020-09-04 17:54:05,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598781243] [2020-09-04 17:54:05,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-09-04 17:54:05,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:54:05,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-09-04 17:54:05,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=8147, Unknown=0, NotChecked=0, Total=8372 [2020-09-04 17:54:05,013 INFO L87 Difference]: Start difference. First operand 429 states and 431 transitions. Second operand 92 states. [2020-09-04 17:54:44,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:54:44,313 INFO L93 Difference]: Finished difference Result 863 states and 868 transitions. [2020-09-04 17:54:44,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2020-09-04 17:54:44,315 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 428 [2020-09-04 17:54:44,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:54:44,318 INFO L225 Difference]: With dead ends: 863 [2020-09-04 17:54:44,318 INFO L226 Difference]: Without dead ends: 452 [2020-09-04 17:54:44,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3917 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=670, Invalid=31910, Unknown=0, NotChecked=0, Total=32580 [2020-09-04 17:54:44,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-09-04 17:54:44,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 438. [2020-09-04 17:54:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-09-04 17:54:44,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 440 transitions. [2020-09-04 17:54:44,333 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 440 transitions. Word has length 428 [2020-09-04 17:54:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:54:44,333 INFO L479 AbstractCegarLoop]: Abstraction has 438 states and 440 transitions. [2020-09-04 17:54:44,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-09-04 17:54:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 440 transitions. [2020-09-04 17:54:44,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-09-04 17:54:44,336 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:54:44,336 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] [2020-09-04 17:54:44,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-09-04 17:54:44,337 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:54:44,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:54:44,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1503707401, now seen corresponding path program 45 times [2020-09-04 17:54:44,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:54:44,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910681915] [2020-09-04 17:54:44,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:54:44,926 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:54:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:54:58,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:54:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:54:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:54:58,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910681915] [2020-09-04 17:54:58,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:54:58,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2020-09-04 17:54:58,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124943325] [2020-09-04 17:54:58,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-09-04 17:54:58,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:54:58,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-09-04 17:54:58,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=8512, Unknown=0, NotChecked=0, Total=8742 [2020-09-04 17:54:58,447 INFO L87 Difference]: Start difference. First operand 438 states and 440 transitions. Second operand 94 states. [2020-09-04 17:55:43,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:55:43,784 INFO L93 Difference]: Finished difference Result 881 states and 886 transitions. [2020-09-04 17:55:43,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2020-09-04 17:55:43,787 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 437 [2020-09-04 17:55:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:55:43,789 INFO L225 Difference]: With dead ends: 881 [2020-09-04 17:55:43,789 INFO L226 Difference]: Without dead ends: 461 [2020-09-04 17:55:43,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4096 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=685, Invalid=33355, Unknown=0, NotChecked=0, Total=34040 [2020-09-04 17:55:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-09-04 17:55:43,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 447. [2020-09-04 17:55:43,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-09-04 17:55:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 449 transitions. [2020-09-04 17:55:43,805 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 449 transitions. Word has length 437 [2020-09-04 17:55:43,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:55:43,806 INFO L479 AbstractCegarLoop]: Abstraction has 447 states and 449 transitions. [2020-09-04 17:55:43,806 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-09-04 17:55:43,806 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 449 transitions. [2020-09-04 17:55:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2020-09-04 17:55:43,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:55:43,808 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] [2020-09-04 17:55:43,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-09-04 17:55:43,809 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:55:43,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:55:43,809 INFO L82 PathProgramCache]: Analyzing trace with hash -990658060, now seen corresponding path program 46 times [2020-09-04 17:55:43,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:55:43,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185803557] [2020-09-04 17:55:43,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:55:44,090 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:55:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:55:59,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:55:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:55:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:55:59,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185803557] [2020-09-04 17:55:59,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:55:59,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2020-09-04 17:55:59,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538908610] [2020-09-04 17:55:59,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-09-04 17:55:59,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:55:59,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-09-04 17:55:59,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=8885, Unknown=0, NotChecked=0, Total=9120 [2020-09-04 17:55:59,839 INFO L87 Difference]: Start difference. First operand 447 states and 449 transitions. Second operand 96 states. [2020-09-04 17:56:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:52,205 INFO L93 Difference]: Finished difference Result 899 states and 904 transitions. [2020-09-04 17:56:52,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2020-09-04 17:56:52,207 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 446 [2020-09-04 17:56:52,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:52,210 INFO L225 Difference]: With dead ends: 899 [2020-09-04 17:56:52,210 INFO L226 Difference]: Without dead ends: 470 [2020-09-04 17:56:52,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4279 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=700, Invalid=34832, Unknown=0, NotChecked=0, Total=35532 [2020-09-04 17:56:52,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-09-04 17:56:52,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 456. [2020-09-04 17:56:52,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-09-04 17:56:52,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 458 transitions. [2020-09-04 17:56:52,227 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 458 transitions. Word has length 446 [2020-09-04 17:56:52,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:52,227 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 458 transitions. [2020-09-04 17:56:52,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-09-04 17:56:52,227 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 458 transitions. [2020-09-04 17:56:52,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2020-09-04 17:56:52,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:52,230 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] [2020-09-04 17:56:52,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-09-04 17:56:52,230 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:52,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:52,230 INFO L82 PathProgramCache]: Analyzing trace with hash -2065282153, now seen corresponding path program 47 times [2020-09-04 17:56:52,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:52,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259279373] [2020-09-04 17:56:52,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:52,430 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:09,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:57:09,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:57:10,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259279373] [2020-09-04 17:57:10,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:57:10,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2020-09-04 17:57:10,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952650159] [2020-09-04 17:57:10,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-09-04 17:57:10,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:57:10,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-09-04 17:57:10,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=9266, Unknown=0, NotChecked=0, Total=9506 [2020-09-04 17:57:10,132 INFO L87 Difference]: Start difference. First operand 456 states and 458 transitions. Second operand 98 states.