/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/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:46:09,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:46:09,861 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:46:09,910 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:46:09,911 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:46:09,923 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:46:09,924 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:46:09,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:46:09,930 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:46:09,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:46:09,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:46:09,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:46:09,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:46:09,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:46:09,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:46:09,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:46:09,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:46:09,952 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:46:09,954 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:46:09,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:46:09,965 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:46:09,966 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:46:09,968 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:46:09,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:46:09,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:46:09,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:46:09,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:46:09,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:46:09,984 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 17:46:09,997 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:46:09,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:46:09,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:46:09,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:46:09,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:46:10,000 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:46:10,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:46:10,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:46:10,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:46:10,001 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:46:10,001 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:46:10,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:46:10,001 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:46:10,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:46:10,002 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:46:10,002 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:46:10,002 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:46:10,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:46:10,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:46:10,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:46:10,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:46:10,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:46:10,003 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:46:10,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:46:10,451 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:46:10,455 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:46:10,457 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:46:10,458 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:46:10,459 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-09-04 17:46:10,563 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0608c6a39/f6919662a3b44b258871df629ef3478c/FLAG8c819d2e9 [2020-09-04 17:46:11,149 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:46:11,150 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2020-09-04 17:46:11,159 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0608c6a39/f6919662a3b44b258871df629ef3478c/FLAG8c819d2e9 [2020-09-04 17:46:11,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0608c6a39/f6919662a3b44b258871df629ef3478c [2020-09-04 17:46:11,508 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:46:11,510 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:46:11,511 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:46:11,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:46:11,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:46:11,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:46:11" (1/1) ... [2020-09-04 17:46:11,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c9e2a22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:11, skipping insertion in model container [2020-09-04 17:46:11,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:46:11" (1/1) ... [2020-09-04 17:46:11,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:46:11,553 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:46:11,770 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:46:11,776 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:46:11,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:46:11,823 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:46:11,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:11 WrapperNode [2020-09-04 17:46:11,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:46:11,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:46:11,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:46:11,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:46:11,928 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:11" (1/1) ... [2020-09-04 17:46:11,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:11" (1/1) ... [2020-09-04 17:46:11,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:11" (1/1) ... [2020-09-04 17:46:11,939 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:11" (1/1) ... [2020-09-04 17:46:11,946 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:11" (1/1) ... [2020-09-04 17:46:11,952 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:11" (1/1) ... [2020-09-04 17:46:11,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:11" (1/1) ... [2020-09-04 17:46:11,961 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:46:11,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:46:11,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:46:11,963 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:46:11,966 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:11" (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 17:46:12,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:46:12,047 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:46:12,047 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:46:12,047 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:46:12,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:46:12,048 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:46:12,048 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:46:12,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 17:46:12,048 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 17:46:12,048 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 17:46:12,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 17:46:12,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:46:12,049 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:46:12,282 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:46:12,283 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 17:46:12,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:46:12 BoogieIcfgContainer [2020-09-04 17:46:12,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:46:12,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:46:12,290 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:46:12,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:46:12,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:46:11" (1/3) ... [2020-09-04 17:46:12,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33009e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:46:12, skipping insertion in model container [2020-09-04 17:46:12,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:46:11" (2/3) ... [2020-09-04 17:46:12,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33009e53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:46:12, skipping insertion in model container [2020-09-04 17:46:12,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:46:12" (3/3) ... [2020-09-04 17:46:12,300 INFO L109 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2020-09-04 17:46:12,316 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:46:12,329 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:46:12,358 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:46:12,421 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:46:12,421 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:46:12,421 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:46:12,421 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:46:12,421 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:46:12,422 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:46:12,422 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:46:12,422 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:46:12,441 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-04 17:46:12,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 17:46:12,457 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:12,458 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:12,458 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:12,465 INFO L82 PathProgramCache]: Analyzing trace with hash -439118320, now seen corresponding path program 1 times [2020-09-04 17:46:12,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:12,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793392934] [2020-09-04 17:46:12,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:12,551 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:12,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:12,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:12,739 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 17:46:12,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793392934] [2020-09-04 17:46:12,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:12,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 17:46:12,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718354275] [2020-09-04 17:46:12,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 17:46:12,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:12,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 17:46:12,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 17:46:12,767 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-09-04 17:46:12,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:12,887 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-09-04 17:46:12,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 17:46:12,889 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-09-04 17:46:12,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:12,901 INFO L225 Difference]: With dead ends: 45 [2020-09-04 17:46:12,902 INFO L226 Difference]: Without dead ends: 21 [2020-09-04 17:46:12,907 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 17:46:12,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-04 17:46:12,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-04 17:46:12,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-04 17:46:12,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-09-04 17:46:12,958 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 16 [2020-09-04 17:46:12,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:12,959 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-09-04 17:46:12,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 17:46:12,959 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-09-04 17:46:12,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 17:46:12,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:12,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:12,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:46:12,962 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:12,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:12,962 INFO L82 PathProgramCache]: Analyzing trace with hash -696780679, now seen corresponding path program 1 times [2020-09-04 17:46:12,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:12,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [376298523] [2020-09-04 17:46:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:12,966 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:12,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:13,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:13,052 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 17:46:13,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [376298523] [2020-09-04 17:46:13,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:13,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 17:46:13,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559405134] [2020-09-04 17:46:13,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 17:46:13,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:13,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 17:46:13,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 17:46:13,056 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 4 states. [2020-09-04 17:46:13,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:13,121 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-04 17:46:13,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 17:46:13,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-09-04 17:46:13,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:13,124 INFO L225 Difference]: With dead ends: 31 [2020-09-04 17:46:13,124 INFO L226 Difference]: Without dead ends: 25 [2020-09-04 17:46:13,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 17:46:13,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-04 17:46:13,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-09-04 17:46:13,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-04 17:46:13,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-04 17:46:13,136 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-04 17:46:13,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:13,136 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-04 17:46:13,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 17:46:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-04 17:46:13,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-04 17:46:13,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:13,138 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] [2020-09-04 17:46:13,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:46:13,138 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:13,139 INFO L82 PathProgramCache]: Analyzing trace with hash 908018199, now seen corresponding path program 1 times [2020-09-04 17:46:13,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:13,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514258066] [2020-09-04 17:46:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:13,168 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:13,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:13,295 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 17:46:13,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514258066] [2020-09-04 17:46:13,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:13,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 17:46:13,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133078227] [2020-09-04 17:46:13,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 17:46:13,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:13,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 17:46:13,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:46:13,299 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2020-09-04 17:46:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:13,404 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-09-04 17:46:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 17:46:13,405 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-09-04 17:46:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:13,406 INFO L225 Difference]: With dead ends: 36 [2020-09-04 17:46:13,406 INFO L226 Difference]: Without dead ends: 30 [2020-09-04 17:46:13,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-09-04 17:46:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-04 17:46:13,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-09-04 17:46:13,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-04 17:46:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-04 17:46:13,416 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-04 17:46:13,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:13,416 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-04 17:46:13,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 17:46:13,417 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-04 17:46:13,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 17:46:13,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:13,418 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:13,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:46:13,419 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:13,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:13,419 INFO L82 PathProgramCache]: Analyzing trace with hash 641420089, now seen corresponding path program 2 times [2020-09-04 17:46:13,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:13,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386964108] [2020-09-04 17:46:13,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:13,434 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:13,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:13,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:13,584 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 17:46:13,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386964108] [2020-09-04 17:46:13,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:13,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 17:46:13,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200540182] [2020-09-04 17:46:13,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 17:46:13,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:13,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 17:46:13,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-04 17:46:13,587 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 8 states. [2020-09-04 17:46:13,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:13,749 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-04 17:46:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 17:46:13,750 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-09-04 17:46:13,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:13,751 INFO L225 Difference]: With dead ends: 41 [2020-09-04 17:46:13,752 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 17:46:13,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-04 17:46:13,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 17:46:13,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-09-04 17:46:13,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 17:46:13,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-04 17:46:13,761 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-04 17:46:13,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:13,762 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-04 17:46:13,762 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 17:46:13,762 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-04 17:46:13,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 17:46:13,763 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:13,764 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:13,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:46:13,764 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:13,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:13,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2101454679, now seen corresponding path program 3 times [2020-09-04 17:46:13,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:13,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181292000] [2020-09-04 17:46:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:13,773 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:13,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:13,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:13,920 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 17:46:13,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181292000] [2020-09-04 17:46:13,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:13,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 17:46:13,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131759927] [2020-09-04 17:46:13,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 17:46:13,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:13,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 17:46:13,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-04 17:46:13,926 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 10 states. [2020-09-04 17:46:14,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:14,104 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-09-04 17:46:14,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 17:46:14,104 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-09-04 17:46:14,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:14,107 INFO L225 Difference]: With dead ends: 46 [2020-09-04 17:46:14,107 INFO L226 Difference]: Without dead ends: 40 [2020-09-04 17:46:14,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-09-04 17:46:14,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-04 17:46:14,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-09-04 17:46:14,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-04 17:46:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-04 17:46:14,123 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-04 17:46:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:14,124 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-04 17:46:14,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 17:46:14,125 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-04 17:46:14,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 17:46:14,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:14,127 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:14,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 17:46:14,128 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:14,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:14,128 INFO L82 PathProgramCache]: Analyzing trace with hash -888787463, now seen corresponding path program 4 times [2020-09-04 17:46:14,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:14,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634869568] [2020-09-04 17:46:14,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:14,134 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:14,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:14,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:14,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:14,278 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 17:46:14,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634869568] [2020-09-04 17:46:14,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:14,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-04 17:46:14,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370520021] [2020-09-04 17:46:14,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 17:46:14,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:14,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 17:46:14,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-09-04 17:46:14,281 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 12 states. [2020-09-04 17:46:14,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:14,478 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-04 17:46:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 17:46:14,478 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-09-04 17:46:14,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:14,480 INFO L225 Difference]: With dead ends: 51 [2020-09-04 17:46:14,480 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 17:46:14,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-09-04 17:46:14,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 17:46:14,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-09-04 17:46:14,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 17:46:14,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-04 17:46:14,489 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-04 17:46:14,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:14,489 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-04 17:46:14,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 17:46:14,490 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-04 17:46:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 17:46:14,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:14,491 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:14,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 17:46:14,491 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:14,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:14,492 INFO L82 PathProgramCache]: Analyzing trace with hash 899054743, now seen corresponding path program 5 times [2020-09-04 17:46:14,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:14,492 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958921282] [2020-09-04 17:46:14,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:14,498 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:14,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:14,672 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 17:46:14,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958921282] [2020-09-04 17:46:14,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:14,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 17:46:14,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104720483] [2020-09-04 17:46:14,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 17:46:14,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:14,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 17:46:14,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-09-04 17:46:14,676 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 14 states. [2020-09-04 17:46:14,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:14,894 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-09-04 17:46:14,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 17:46:14,895 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-09-04 17:46:14,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:14,896 INFO L225 Difference]: With dead ends: 56 [2020-09-04 17:46:14,896 INFO L226 Difference]: Without dead ends: 50 [2020-09-04 17:46:14,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-09-04 17:46:14,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-04 17:46:14,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-04 17:46:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 17:46:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-09-04 17:46:14,904 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-09-04 17:46:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:14,905 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-09-04 17:46:14,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 17:46:14,905 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-09-04 17:46:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-04 17:46:14,906 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:14,907 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:14,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 17:46:14,907 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:14,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:14,907 INFO L82 PathProgramCache]: Analyzing trace with hash 212115641, now seen corresponding path program 6 times [2020-09-04 17:46:14,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:14,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661421085] [2020-09-04 17:46:14,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:14,912 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:15,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:15,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:15,107 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 17:46:15,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661421085] [2020-09-04 17:46:15,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:15,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-04 17:46:15,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098975999] [2020-09-04 17:46:15,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 17:46:15,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:15,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 17:46:15,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-04 17:46:15,110 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 16 states. [2020-09-04 17:46:15,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:15,419 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-09-04 17:46:15,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 17:46:15,420 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-09-04 17:46:15,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:15,421 INFO L225 Difference]: With dead ends: 61 [2020-09-04 17:46:15,421 INFO L226 Difference]: Without dead ends: 55 [2020-09-04 17:46:15,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2020-09-04 17:46:15,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-04 17:46:15,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-04 17:46:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-04 17:46:15,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-04 17:46:15,430 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-09-04 17:46:15,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:15,431 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-04 17:46:15,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 17:46:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-04 17:46:15,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-04 17:46:15,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:15,433 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:15,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 17:46:15,433 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:15,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:15,434 INFO L82 PathProgramCache]: Analyzing trace with hash 382845399, now seen corresponding path program 7 times [2020-09-04 17:46:15,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:15,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156828992] [2020-09-04 17:46:15,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:15,439 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:15,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:15,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:15,675 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 17:46:15,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156828992] [2020-09-04 17:46:15,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:15,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-04 17:46:15,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691708051] [2020-09-04 17:46:15,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 17:46:15,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:15,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 17:46:15,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-09-04 17:46:15,678 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 18 states. [2020-09-04 17:46:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:16,077 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-09-04 17:46:16,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 17:46:16,078 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 51 [2020-09-04 17:46:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:16,079 INFO L225 Difference]: With dead ends: 66 [2020-09-04 17:46:16,079 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 17:46:16,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-09-04 17:46:16,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 17:46:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-09-04 17:46:16,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-04 17:46:16,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-09-04 17:46:16,088 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-09-04 17:46:16,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:16,089 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-09-04 17:46:16,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 17:46:16,089 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-09-04 17:46:16,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-04 17:46:16,090 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:16,091 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:16,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 17:46:16,091 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:16,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:16,092 INFO L82 PathProgramCache]: Analyzing trace with hash -471686279, now seen corresponding path program 8 times [2020-09-04 17:46:16,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:16,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2011042959] [2020-09-04 17:46:16,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:16,096 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:16,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:16,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:16,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:16,386 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 17:46:16,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2011042959] [2020-09-04 17:46:16,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:16,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-09-04 17:46:16,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327117230] [2020-09-04 17:46:16,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 17:46:16,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:16,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 17:46:16,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-09-04 17:46:16,389 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 20 states. [2020-09-04 17:46:16,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:16,880 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-09-04 17:46:16,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 17:46:16,880 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 56 [2020-09-04 17:46:16,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:16,882 INFO L225 Difference]: With dead ends: 71 [2020-09-04 17:46:16,882 INFO L226 Difference]: Without dead ends: 65 [2020-09-04 17:46:16,885 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=855, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 17:46:16,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-04 17:46:16,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-09-04 17:46:16,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-04 17:46:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-09-04 17:46:16,900 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-09-04 17:46:16,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:16,901 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-09-04 17:46:16,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 17:46:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-09-04 17:46:16,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-04 17:46:16,902 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:16,903 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:16,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 17:46:16,904 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:16,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:16,905 INFO L82 PathProgramCache]: Analyzing trace with hash -945326313, now seen corresponding path program 9 times [2020-09-04 17:46:16,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:16,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920286116] [2020-09-04 17:46:16,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:16,909 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:16,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:17,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:17,226 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 17:46:17,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920286116] [2020-09-04 17:46:17,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:17,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-09-04 17:46:17,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537200092] [2020-09-04 17:46:17,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 17:46:17,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:17,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 17:46:17,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-09-04 17:46:17,229 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 22 states. [2020-09-04 17:46:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:17,730 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-09-04 17:46:17,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-04 17:46:17,731 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-09-04 17:46:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:17,732 INFO L225 Difference]: With dead ends: 76 [2020-09-04 17:46:17,732 INFO L226 Difference]: Without dead ends: 70 [2020-09-04 17:46:17,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 17:46:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-04 17:46:17,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-09-04 17:46:17,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-04 17:46:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-09-04 17:46:17,741 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-09-04 17:46:17,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:17,742 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-09-04 17:46:17,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 17:46:17,742 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-09-04 17:46:17,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-04 17:46:17,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:17,743 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:17,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 17:46:17,744 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:17,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:17,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1165216199, now seen corresponding path program 10 times [2020-09-04 17:46:17,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:17,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137798174] [2020-09-04 17:46:17,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:17,749 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:18,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:18,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:18,114 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 17:46:18,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137798174] [2020-09-04 17:46:18,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:18,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-09-04 17:46:18,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778802767] [2020-09-04 17:46:18,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 17:46:18,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:18,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 17:46:18,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2020-09-04 17:46:18,118 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 24 states. [2020-09-04 17:46:18,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:18,721 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-09-04 17:46:18,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-04 17:46:18,721 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 66 [2020-09-04 17:46:18,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:18,722 INFO L225 Difference]: With dead ends: 81 [2020-09-04 17:46:18,723 INFO L226 Difference]: Without dead ends: 75 [2020-09-04 17:46:18,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=605, Invalid=1287, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 17:46:18,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-04 17:46:18,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-09-04 17:46:18,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-04 17:46:18,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-09-04 17:46:18,745 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 66 [2020-09-04 17:46:18,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:18,746 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-09-04 17:46:18,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 17:46:18,746 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-09-04 17:46:18,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-04 17:46:18,749 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:18,749 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:18,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 17:46:18,749 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:18,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:18,752 INFO L82 PathProgramCache]: Analyzing trace with hash 499883095, now seen corresponding path program 11 times [2020-09-04 17:46:18,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:18,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431693582] [2020-09-04 17:46:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:18,762 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:18,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:19,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:19,221 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 17:46:19,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431693582] [2020-09-04 17:46:19,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:19,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-09-04 17:46:19,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949761818] [2020-09-04 17:46:19,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 17:46:19,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:19,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 17:46:19,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-09-04 17:46:19,224 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 26 states. [2020-09-04 17:46:19,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:19,935 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-09-04 17:46:19,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-04 17:46:19,935 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 71 [2020-09-04 17:46:19,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:19,937 INFO L225 Difference]: With dead ends: 86 [2020-09-04 17:46:19,937 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 17:46:19,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 17:46:19,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 17:46:19,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-09-04 17:46:19,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-04 17:46:19,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-09-04 17:46:19,949 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 71 [2020-09-04 17:46:19,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:19,949 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-09-04 17:46:19,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 17:46:19,949 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-09-04 17:46:19,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-04 17:46:19,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:19,951 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:19,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 17:46:19,952 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:19,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:19,952 INFO L82 PathProgramCache]: Analyzing trace with hash 728586489, now seen corresponding path program 12 times [2020-09-04 17:46:19,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:19,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892560542] [2020-09-04 17:46:19,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:19,958 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:20,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:20,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:20,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892560542] [2020-09-04 17:46:20,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:20,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-09-04 17:46:20,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729562669] [2020-09-04 17:46:20,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 17:46:20,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:20,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 17:46:20,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2020-09-04 17:46:20,432 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 28 states. [2020-09-04 17:46:21,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:21,246 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-09-04 17:46:21,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-04 17:46:21,247 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 76 [2020-09-04 17:46:21,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:21,248 INFO L225 Difference]: With dead ends: 91 [2020-09-04 17:46:21,248 INFO L226 Difference]: Without dead ends: 85 [2020-09-04 17:46:21,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=845, Invalid=1807, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 17:46:21,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-04 17:46:21,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-09-04 17:46:21,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-04 17:46:21,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-09-04 17:46:21,260 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 76 [2020-09-04 17:46:21,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:21,261 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-09-04 17:46:21,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 17:46:21,261 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-09-04 17:46:21,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-04 17:46:21,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:21,262 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:21,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 17:46:21,263 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:21,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:21,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1576153495, now seen corresponding path program 13 times [2020-09-04 17:46:21,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:21,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724141875] [2020-09-04 17:46:21,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:21,273 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:21,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:21,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:21,760 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 17:46:21,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724141875] [2020-09-04 17:46:21,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:21,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-09-04 17:46:21,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933213608] [2020-09-04 17:46:21,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 17:46:21,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:21,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 17:46:21,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2020-09-04 17:46:21,763 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 30 states. [2020-09-04 17:46:22,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:22,605 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-09-04 17:46:22,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-04 17:46:22,606 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 81 [2020-09-04 17:46:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:22,607 INFO L225 Difference]: With dead ends: 96 [2020-09-04 17:46:22,607 INFO L226 Difference]: Without dead ends: 90 [2020-09-04 17:46:22,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=980, Invalid=2100, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 17:46:22,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-04 17:46:22,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-09-04 17:46:22,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-04 17:46:22,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-09-04 17:46:22,622 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 81 [2020-09-04 17:46:22,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:22,623 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-09-04 17:46:22,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 17:46:22,623 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-09-04 17:46:22,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 17:46:22,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:22,625 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:22,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 17:46:22,625 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:22,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:22,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1034810439, now seen corresponding path program 14 times [2020-09-04 17:46:22,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:22,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520561098] [2020-09-04 17:46:22,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:22,631 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:23,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:23,162 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 17:46:23,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520561098] [2020-09-04 17:46:23,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:23,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-09-04 17:46:23,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589857851] [2020-09-04 17:46:23,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 17:46:23,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:23,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 17:46:23,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-09-04 17:46:23,165 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 32 states. [2020-09-04 17:46:24,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:24,074 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2020-09-04 17:46:24,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-04 17:46:24,075 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 86 [2020-09-04 17:46:24,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:24,076 INFO L225 Difference]: With dead ends: 101 [2020-09-04 17:46:24,076 INFO L226 Difference]: Without dead ends: 95 [2020-09-04 17:46:24,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 17:46:24,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-04 17:46:24,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-09-04 17:46:24,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-04 17:46:24,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-09-04 17:46:24,083 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 86 [2020-09-04 17:46:24,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:24,083 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-09-04 17:46:24,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 17:46:24,083 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-09-04 17:46:24,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-04 17:46:24,084 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:24,085 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:24,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 17:46:24,085 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:24,086 INFO L82 PathProgramCache]: Analyzing trace with hash 2077177559, now seen corresponding path program 15 times [2020-09-04 17:46:24,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:24,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275259999] [2020-09-04 17:46:24,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:24,096 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:24,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:24,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:24,663 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 17:46:24,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275259999] [2020-09-04 17:46:24,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:24,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-09-04 17:46:24,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960331626] [2020-09-04 17:46:24,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 17:46:24,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:24,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 17:46:24,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 17:46:24,666 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 34 states. [2020-09-04 17:46:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:25,690 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2020-09-04 17:46:25,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-04 17:46:25,691 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 91 [2020-09-04 17:46:25,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:25,692 INFO L225 Difference]: With dead ends: 106 [2020-09-04 17:46:25,692 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 17:46:25,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 674 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1280, Invalid=2752, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 17:46:25,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 17:46:25,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-09-04 17:46:25,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-04 17:46:25,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-09-04 17:46:25,701 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 91 [2020-09-04 17:46:25,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:25,701 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-09-04 17:46:25,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 17:46:25,701 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-09-04 17:46:25,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-04 17:46:25,702 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:25,703 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:25,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 17:46:25,703 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:25,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:25,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1140437383, now seen corresponding path program 16 times [2020-09-04 17:46:25,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:25,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145516929] [2020-09-04 17:46:25,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:25,712 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:26,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:26,309 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 17:46:26,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145516929] [2020-09-04 17:46:26,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:26,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-09-04 17:46:26,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068319202] [2020-09-04 17:46:26,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 17:46:26,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:26,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 17:46:26,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 17:46:26,313 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand 36 states. [2020-09-04 17:46:27,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:27,616 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-09-04 17:46:27,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-04 17:46:27,617 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 96 [2020-09-04 17:46:27,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:27,618 INFO L225 Difference]: With dead ends: 111 [2020-09-04 17:46:27,618 INFO L226 Difference]: Without dead ends: 105 [2020-09-04 17:46:27,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-09-04 17:46:27,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-04 17:46:27,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-09-04 17:46:27,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-04 17:46:27,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2020-09-04 17:46:27,627 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 96 [2020-09-04 17:46:27,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:27,628 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2020-09-04 17:46:27,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 17:46:27,628 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2020-09-04 17:46:27,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-09-04 17:46:27,630 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:27,630 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:27,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 17:46:27,630 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:27,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:27,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1511435287, now seen corresponding path program 17 times [2020-09-04 17:46:27,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:27,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408893822] [2020-09-04 17:46:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:27,638 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:28,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:28,428 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 17:46:28,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408893822] [2020-09-04 17:46:28,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:28,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-09-04 17:46:28,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243305888] [2020-09-04 17:46:28,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 17:46:28,430 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:28,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 17:46:28,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 17:46:28,431 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand 38 states. [2020-09-04 17:46:29,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:29,670 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2020-09-04 17:46:29,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-04 17:46:29,671 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 101 [2020-09-04 17:46:29,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:29,672 INFO L225 Difference]: With dead ends: 116 [2020-09-04 17:46:29,672 INFO L226 Difference]: Without dead ends: 110 [2020-09-04 17:46:29,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1620, Invalid=3492, Unknown=0, NotChecked=0, Total=5112 [2020-09-04 17:46:29,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-04 17:46:29,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-09-04 17:46:29,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-04 17:46:29,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-09-04 17:46:29,681 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 101 [2020-09-04 17:46:29,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:29,681 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-09-04 17:46:29,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 17:46:29,682 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-09-04 17:46:29,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-04 17:46:29,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:29,683 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:29,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 17:46:29,683 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:29,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:29,684 INFO L82 PathProgramCache]: Analyzing trace with hash -967433927, now seen corresponding path program 18 times [2020-09-04 17:46:29,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:29,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317049957] [2020-09-04 17:46:29,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:29,693 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:30,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:30,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:30,581 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 17:46:30,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317049957] [2020-09-04 17:46:30,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:30,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-09-04 17:46:30,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567331575] [2020-09-04 17:46:30,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 17:46:30,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:30,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 17:46:30,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 17:46:30,584 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 40 states. [2020-09-04 17:46:32,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:32,046 INFO L93 Difference]: Finished difference Result 121 states and 121 transitions. [2020-09-04 17:46:32,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-09-04 17:46:32,046 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 106 [2020-09-04 17:46:32,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:32,048 INFO L225 Difference]: With dead ends: 121 [2020-09-04 17:46:32,048 INFO L226 Difference]: Without dead ends: 115 [2020-09-04 17:46:32,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-09-04 17:46:32,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-04 17:46:32,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-09-04 17:46:32,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-04 17:46:32,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 112 transitions. [2020-09-04 17:46:32,057 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 112 transitions. Word has length 106 [2020-09-04 17:46:32,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:32,057 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 112 transitions. [2020-09-04 17:46:32,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 17:46:32,057 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 112 transitions. [2020-09-04 17:46:32,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-09-04 17:46:32,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:32,059 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:32,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 17:46:32,059 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:32,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:32,060 INFO L82 PathProgramCache]: Analyzing trace with hash 175935831, now seen corresponding path program 19 times [2020-09-04 17:46:32,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:32,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021732865] [2020-09-04 17:46:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:32,070 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:32,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:32,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:32,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021732865] [2020-09-04 17:46:32,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:32,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-09-04 17:46:32,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983741125] [2020-09-04 17:46:32,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 17:46:32,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:32,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 17:46:32,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 17:46:32,943 INFO L87 Difference]: Start difference. First operand 112 states and 112 transitions. Second operand 42 states. [2020-09-04 17:46:34,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:34,400 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-09-04 17:46:34,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-09-04 17:46:34,400 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 111 [2020-09-04 17:46:34,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:34,402 INFO L225 Difference]: With dead ends: 126 [2020-09-04 17:46:34,402 INFO L226 Difference]: Without dead ends: 120 [2020-09-04 17:46:34,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2000, Invalid=4320, Unknown=0, NotChecked=0, Total=6320 [2020-09-04 17:46:34,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-04 17:46:34,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-09-04 17:46:34,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-09-04 17:46:34,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2020-09-04 17:46:34,411 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 111 [2020-09-04 17:46:34,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:34,411 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2020-09-04 17:46:34,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 17:46:34,412 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2020-09-04 17:46:34,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-04 17:46:34,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:34,413 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:34,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 17:46:34,413 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:34,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:34,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1072856071, now seen corresponding path program 20 times [2020-09-04 17:46:34,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:34,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [812750040] [2020-09-04 17:46:34,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:34,423 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:35,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:35,496 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 17:46:35,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [812750040] [2020-09-04 17:46:35,497 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:35,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-09-04 17:46:35,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090788961] [2020-09-04 17:46:35,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 17:46:35,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:35,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 17:46:35,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 17:46:35,499 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand 44 states. [2020-09-04 17:46:37,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:37,261 INFO L93 Difference]: Finished difference Result 131 states and 131 transitions. [2020-09-04 17:46:37,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-09-04 17:46:37,266 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 116 [2020-09-04 17:46:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:37,267 INFO L225 Difference]: With dead ends: 131 [2020-09-04 17:46:37,267 INFO L226 Difference]: Without dead ends: 125 [2020-09-04 17:46:37,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-09-04 17:46:37,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-04 17:46:37,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-09-04 17:46:37,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-09-04 17:46:37,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 122 transitions. [2020-09-04 17:46:37,279 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 122 transitions. Word has length 116 [2020-09-04 17:46:37,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:37,279 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 122 transitions. [2020-09-04 17:46:37,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 17:46:37,280 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 122 transitions. [2020-09-04 17:46:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-09-04 17:46:37,281 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:37,281 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:37,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 17:46:37,281 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:37,282 INFO L82 PathProgramCache]: Analyzing trace with hash 229959319, now seen corresponding path program 21 times [2020-09-04 17:46:37,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:37,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516080349] [2020-09-04 17:46:37,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:37,298 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:38,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:38,410 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 17:46:38,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516080349] [2020-09-04 17:46:38,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:38,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-09-04 17:46:38,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865006977] [2020-09-04 17:46:38,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-04 17:46:38,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:38,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-04 17:46:38,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 17:46:38,414 INFO L87 Difference]: Start difference. First operand 122 states and 122 transitions. Second operand 46 states. [2020-09-04 17:46:40,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:40,326 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2020-09-04 17:46:40,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-09-04 17:46:40,327 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 121 [2020-09-04 17:46:40,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:40,328 INFO L225 Difference]: With dead ends: 136 [2020-09-04 17:46:40,329 INFO L226 Difference]: Without dead ends: 130 [2020-09-04 17:46:40,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1322 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2420, Invalid=5236, Unknown=0, NotChecked=0, Total=7656 [2020-09-04 17:46:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-04 17:46:40,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-09-04 17:46:40,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-09-04 17:46:40,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2020-09-04 17:46:40,337 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 121 [2020-09-04 17:46:40,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:40,337 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2020-09-04 17:46:40,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-04 17:46:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2020-09-04 17:46:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-04 17:46:40,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:40,338 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:40,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-04 17:46:40,339 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:40,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:40,339 INFO L82 PathProgramCache]: Analyzing trace with hash 2029549241, now seen corresponding path program 22 times [2020-09-04 17:46:40,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:40,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929513773] [2020-09-04 17:46:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:40,344 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:41,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:41,570 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 17:46:41,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929513773] [2020-09-04 17:46:41,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:41,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-09-04 17:46:41,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266799871] [2020-09-04 17:46:41,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-04 17:46:41,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:41,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-04 17:46:41,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 17:46:41,572 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand 48 states. [2020-09-04 17:46:43,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:43,695 INFO L93 Difference]: Finished difference Result 141 states and 141 transitions. [2020-09-04 17:46:43,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-09-04 17:46:43,695 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 126 [2020-09-04 17:46:43,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:43,697 INFO L225 Difference]: With dead ends: 141 [2020-09-04 17:46:43,697 INFO L226 Difference]: Without dead ends: 135 [2020-09-04 17:46:43,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-09-04 17:46:43,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-04 17:46:43,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-09-04 17:46:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-09-04 17:46:43,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 132 transitions. [2020-09-04 17:46:43,705 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 132 transitions. Word has length 126 [2020-09-04 17:46:43,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:43,706 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 132 transitions. [2020-09-04 17:46:43,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-09-04 17:46:43,706 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 132 transitions. [2020-09-04 17:46:43,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-09-04 17:46:43,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:43,707 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:43,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-04 17:46:43,707 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:43,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:43,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1821135913, now seen corresponding path program 23 times [2020-09-04 17:46:43,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:43,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973322726] [2020-09-04 17:46:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:43,717 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:43,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:45,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:45,083 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 17:46:45,083 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973322726] [2020-09-04 17:46:45,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:45,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-09-04 17:46:45,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729178556] [2020-09-04 17:46:45,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-09-04 17:46:45,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:45,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-09-04 17:46:45,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2020-09-04 17:46:45,085 INFO L87 Difference]: Start difference. First operand 132 states and 132 transitions. Second operand 50 states. [2020-09-04 17:46:47,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:47,311 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2020-09-04 17:46:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-09-04 17:46:47,311 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 131 [2020-09-04 17:46:47,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:47,313 INFO L225 Difference]: With dead ends: 146 [2020-09-04 17:46:47,313 INFO L226 Difference]: Without dead ends: 140 [2020-09-04 17:46:47,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1586 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2880, Invalid=6240, Unknown=0, NotChecked=0, Total=9120 [2020-09-04 17:46:47,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-04 17:46:47,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-09-04 17:46:47,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-09-04 17:46:47,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2020-09-04 17:46:47,320 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 131 [2020-09-04 17:46:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:47,321 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2020-09-04 17:46:47,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-09-04 17:46:47,321 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2020-09-04 17:46:47,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-04 17:46:47,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:47,322 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:47,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-04 17:46:47,323 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:47,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:47,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1910700409, now seen corresponding path program 24 times [2020-09-04 17:46:47,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:47,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768197348] [2020-09-04 17:46:47,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:47,328 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:48,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:48,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:48,778 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 17:46:48,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768197348] [2020-09-04 17:46:48,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:48,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-09-04 17:46:48,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970610268] [2020-09-04 17:46:48,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-09-04 17:46:48,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:48,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-09-04 17:46:48,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 17:46:48,784 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand 52 states. [2020-09-04 17:46:51,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:51,172 INFO L93 Difference]: Finished difference Result 151 states and 151 transitions. [2020-09-04 17:46:51,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-09-04 17:46:51,173 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 136 [2020-09-04 17:46:51,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:51,174 INFO L225 Difference]: With dead ends: 151 [2020-09-04 17:46:51,174 INFO L226 Difference]: Without dead ends: 145 [2020-09-04 17:46:51,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-09-04 17:46:51,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-04 17:46:51,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-09-04 17:46:51,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-09-04 17:46:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 142 transitions. [2020-09-04 17:46:51,181 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 142 transitions. Word has length 136 [2020-09-04 17:46:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:51,182 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 142 transitions. [2020-09-04 17:46:51,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-09-04 17:46:51,182 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 142 transitions. [2020-09-04 17:46:51,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-09-04 17:46:51,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:51,183 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:51,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-04 17:46:51,184 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:51,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:51,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1167269609, now seen corresponding path program 25 times [2020-09-04 17:46:51,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:51,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925054000] [2020-09-04 17:46:51,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:51,196 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:52,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:46:52,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925054000] [2020-09-04 17:46:52,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:52,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-09-04 17:46:52,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329218049] [2020-09-04 17:46:52,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-09-04 17:46:52,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:52,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-09-04 17:46:52,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 17:46:52,807 INFO L87 Difference]: Start difference. First operand 142 states and 142 transitions. Second operand 54 states. [2020-09-04 17:46:55,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:55,364 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2020-09-04 17:46:55,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-09-04 17:46:55,365 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 141 [2020-09-04 17:46:55,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:55,366 INFO L225 Difference]: With dead ends: 156 [2020-09-04 17:46:55,366 INFO L226 Difference]: Without dead ends: 150 [2020-09-04 17:46:55,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1874 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3380, Invalid=7332, Unknown=0, NotChecked=0, Total=10712 [2020-09-04 17:46:55,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-04 17:46:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-09-04 17:46:55,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-09-04 17:46:55,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-09-04 17:46:55,376 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 141 [2020-09-04 17:46:55,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:55,376 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-09-04 17:46:55,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-09-04 17:46:55,377 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-09-04 17:46:55,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-04 17:46:55,377 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:55,378 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:55,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-04 17:46:55,378 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:55,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:55,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1667691463, now seen corresponding path program 26 times [2020-09-04 17:46:55,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:55,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678806328] [2020-09-04 17:46:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:55,387 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:55,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:57,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:46:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:46:57,089 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 17:46:57,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678806328] [2020-09-04 17:46:57,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:46:57,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-09-04 17:46:57,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411889516] [2020-09-04 17:46:57,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-09-04 17:46:57,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:46:57,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-09-04 17:46:57,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 17:46:57,094 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 56 states. [2020-09-04 17:46:59,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:59,854 INFO L93 Difference]: Finished difference Result 161 states and 161 transitions. [2020-09-04 17:46:59,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-09-04 17:46:59,855 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 146 [2020-09-04 17:46:59,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:59,857 INFO L225 Difference]: With dead ends: 161 [2020-09-04 17:46:59,857 INFO L226 Difference]: Without dead ends: 155 [2020-09-04 17:46:59,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2027 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-09-04 17:46:59,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-04 17:46:59,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-09-04 17:46:59,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-09-04 17:46:59,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 152 transitions. [2020-09-04 17:46:59,865 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 152 transitions. Word has length 146 [2020-09-04 17:46:59,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:59,866 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 152 transitions. [2020-09-04 17:46:59,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-09-04 17:46:59,866 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 152 transitions. [2020-09-04 17:46:59,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-09-04 17:46:59,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:59,867 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:59,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-04 17:46:59,868 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:59,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:59,868 INFO L82 PathProgramCache]: Analyzing trace with hash -799766953, now seen corresponding path program 27 times [2020-09-04 17:46:59,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:59,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254798102] [2020-09-04 17:46:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:59,877 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:46:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:01,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:01,735 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 17:47:01,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254798102] [2020-09-04 17:47:01,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:01,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2020-09-04 17:47:01,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138700724] [2020-09-04 17:47:01,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-09-04 17:47:01,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:01,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-09-04 17:47:01,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2020-09-04 17:47:01,737 INFO L87 Difference]: Start difference. First operand 152 states and 152 transitions. Second operand 58 states. [2020-09-04 17:47:04,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:04,752 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-09-04 17:47:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-09-04 17:47:04,752 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 151 [2020-09-04 17:47:04,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:04,754 INFO L225 Difference]: With dead ends: 166 [2020-09-04 17:47:04,755 INFO L226 Difference]: Without dead ends: 160 [2020-09-04 17:47:04,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2186 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3920, Invalid=8512, Unknown=0, NotChecked=0, Total=12432 [2020-09-04 17:47:04,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-04 17:47:04,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-09-04 17:47:04,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-09-04 17:47:04,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2020-09-04 17:47:04,762 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 151 [2020-09-04 17:47:04,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:04,763 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2020-09-04 17:47:04,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-09-04 17:47:04,763 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2020-09-04 17:47:04,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-04 17:47:04,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:04,764 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:47:04,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-04 17:47:04,765 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:04,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:04,765 INFO L82 PathProgramCache]: Analyzing trace with hash 468102905, now seen corresponding path program 28 times [2020-09-04 17:47:04,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:04,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216168882] [2020-09-04 17:47:04,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:04,772 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:06,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:06,742 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 17:47:06,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216168882] [2020-09-04 17:47:06,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:06,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-09-04 17:47:06,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492629302] [2020-09-04 17:47:06,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-09-04 17:47:06,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:06,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-09-04 17:47:06,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 17:47:06,744 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand 60 states. [2020-09-04 17:47:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:10,016 INFO L93 Difference]: Finished difference Result 171 states and 171 transitions. [2020-09-04 17:47:10,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-09-04 17:47:10,022 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 156 [2020-09-04 17:47:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:10,024 INFO L225 Difference]: With dead ends: 171 [2020-09-04 17:47:10,024 INFO L226 Difference]: Without dead ends: 165 [2020-09-04 17:47:10,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-09-04 17:47:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-04 17:47:10,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-09-04 17:47:10,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-09-04 17:47:10,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 162 transitions. [2020-09-04 17:47:10,031 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 162 transitions. Word has length 156 [2020-09-04 17:47:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:10,031 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 162 transitions. [2020-09-04 17:47:10,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-09-04 17:47:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 162 transitions. [2020-09-04 17:47:10,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-09-04 17:47:10,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:10,033 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:47:10,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-04 17:47:10,033 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:10,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:10,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1847682153, now seen corresponding path program 29 times [2020-09-04 17:47:10,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:10,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936917007] [2020-09-04 17:47:10,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:10,039 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:10,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:12,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:12,151 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 17:47:12,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936917007] [2020-09-04 17:47:12,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:12,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2020-09-04 17:47:12,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706349875] [2020-09-04 17:47:12,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-09-04 17:47:12,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:12,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-09-04 17:47:12,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2020-09-04 17:47:12,154 INFO L87 Difference]: Start difference. First operand 162 states and 162 transitions. Second operand 62 states. [2020-09-04 17:47:15,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:15,648 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2020-09-04 17:47:15,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-09-04 17:47:15,649 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 161 [2020-09-04 17:47:15,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:15,651 INFO L225 Difference]: With dead ends: 176 [2020-09-04 17:47:15,651 INFO L226 Difference]: Without dead ends: 170 [2020-09-04 17:47:15,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2522 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4500, Invalid=9780, Unknown=0, NotChecked=0, Total=14280 [2020-09-04 17:47:15,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-04 17:47:15,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-09-04 17:47:15,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-09-04 17:47:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2020-09-04 17:47:15,659 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 161 [2020-09-04 17:47:15,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:15,659 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2020-09-04 17:47:15,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-09-04 17:47:15,659 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2020-09-04 17:47:15,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-04 17:47:15,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:15,661 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:47:15,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-04 17:47:15,661 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:15,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:15,662 INFO L82 PathProgramCache]: Analyzing trace with hash 60285369, now seen corresponding path program 30 times [2020-09-04 17:47:15,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:15,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997677213] [2020-09-04 17:47:15,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:15,670 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:15,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:17,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:17,942 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 17:47:17,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997677213] [2020-09-04 17:47:17,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:17,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-09-04 17:47:17,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091630454] [2020-09-04 17:47:17,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-09-04 17:47:17,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:17,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-09-04 17:47:17,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 17:47:17,945 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand 64 states. [2020-09-04 17:47:21,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:21,551 INFO L93 Difference]: Finished difference Result 181 states and 181 transitions. [2020-09-04 17:47:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-09-04 17:47:21,552 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 166 [2020-09-04 17:47:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:21,553 INFO L225 Difference]: With dead ends: 181 [2020-09-04 17:47:21,553 INFO L226 Difference]: Without dead ends: 175 [2020-09-04 17:47:21,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-09-04 17:47:21,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-09-04 17:47:21,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2020-09-04 17:47:21,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-09-04 17:47:21,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 172 transitions. [2020-09-04 17:47:21,561 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 172 transitions. Word has length 166 [2020-09-04 17:47:21,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:21,562 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 172 transitions. [2020-09-04 17:47:21,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-09-04 17:47:21,562 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 172 transitions. [2020-09-04 17:47:21,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-09-04 17:47:21,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:21,563 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:47:21,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-04 17:47:21,564 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:21,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:21,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1790910679, now seen corresponding path program 31 times [2020-09-04 17:47:21,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:21,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013060336] [2020-09-04 17:47:21,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:21,574 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:21,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:23,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:24,008 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 17:47:24,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013060336] [2020-09-04 17:47:24,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:24,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2020-09-04 17:47:24,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135093150] [2020-09-04 17:47:24,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-09-04 17:47:24,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:24,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-09-04 17:47:24,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2020-09-04 17:47:24,010 INFO L87 Difference]: Start difference. First operand 172 states and 172 transitions. Second operand 66 states. [2020-09-04 17:47:27,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:27,890 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2020-09-04 17:47:27,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-09-04 17:47:27,891 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 171 [2020-09-04 17:47:27,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:27,895 INFO L225 Difference]: With dead ends: 186 [2020-09-04 17:47:27,896 INFO L226 Difference]: Without dead ends: 180 [2020-09-04 17:47:27,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5120, Invalid=11136, Unknown=0, NotChecked=0, Total=16256 [2020-09-04 17:47:27,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-09-04 17:47:27,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-09-04 17:47:27,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-09-04 17:47:27,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2020-09-04 17:47:27,905 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 171 [2020-09-04 17:47:27,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:27,905 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2020-09-04 17:47:27,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-09-04 17:47:27,906 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2020-09-04 17:47:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-04 17:47:27,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:27,907 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:47:27,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-04 17:47:27,907 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:27,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:27,908 INFO L82 PathProgramCache]: Analyzing trace with hash 410559609, now seen corresponding path program 32 times [2020-09-04 17:47:27,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:27,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015494159] [2020-09-04 17:47:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:27,912 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:30,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:30,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:30,493 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 17:47:30,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015494159] [2020-09-04 17:47:30,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:30,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2020-09-04 17:47:30,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315927549] [2020-09-04 17:47:30,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-09-04 17:47:30,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:30,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-09-04 17:47:30,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-09-04 17:47:30,495 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand 68 states. [2020-09-04 17:47:34,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:34,810 INFO L93 Difference]: Finished difference Result 191 states and 191 transitions. [2020-09-04 17:47:34,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-09-04 17:47:34,811 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 176 [2020-09-04 17:47:34,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:34,813 INFO L225 Difference]: With dead ends: 191 [2020-09-04 17:47:34,813 INFO L226 Difference]: Without dead ends: 185 [2020-09-04 17:47:34,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3071 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-09-04 17:47:34,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-09-04 17:47:34,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-09-04 17:47:34,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-09-04 17:47:34,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 182 transitions. [2020-09-04 17:47:34,821 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 182 transitions. Word has length 176 [2020-09-04 17:47:34,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:34,821 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 182 transitions. [2020-09-04 17:47:34,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-09-04 17:47:34,822 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 182 transitions. [2020-09-04 17:47:34,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-09-04 17:47:34,823 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:34,823 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:47:34,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-04 17:47:34,823 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:34,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:34,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1247144425, now seen corresponding path program 33 times [2020-09-04 17:47:34,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:34,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086028014] [2020-09-04 17:47:34,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:34,831 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:34,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:37,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:37,683 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 17:47:37,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086028014] [2020-09-04 17:47:37,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:37,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2020-09-04 17:47:37,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572686527] [2020-09-04 17:47:37,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-09-04 17:47:37,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:37,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-09-04 17:47:37,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2020-09-04 17:47:37,686 INFO L87 Difference]: Start difference. First operand 182 states and 182 transitions. Second operand 70 states. [2020-09-04 17:47:42,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:42,398 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2020-09-04 17:47:42,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-09-04 17:47:42,399 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 181 [2020-09-04 17:47:42,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:42,401 INFO L225 Difference]: With dead ends: 196 [2020-09-04 17:47:42,403 INFO L226 Difference]: Without dead ends: 190 [2020-09-04 17:47:42,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5780, Invalid=12580, Unknown=0, NotChecked=0, Total=18360 [2020-09-04 17:47:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-09-04 17:47:42,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-09-04 17:47:42,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-09-04 17:47:42,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-09-04 17:47:42,411 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 181 [2020-09-04 17:47:42,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:42,412 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-09-04 17:47:42,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-09-04 17:47:42,412 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-09-04 17:47:42,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-04 17:47:42,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:42,413 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:47:42,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-04 17:47:42,413 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:42,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:42,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1873479879, now seen corresponding path program 34 times [2020-09-04 17:47:42,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:42,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422856832] [2020-09-04 17:47:42,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:42,418 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:45,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:45,454 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 17:47:45,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422856832] [2020-09-04 17:47:45,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:45,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2020-09-04 17:47:45,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990592262] [2020-09-04 17:47:45,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-09-04 17:47:45,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:45,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-09-04 17:47:45,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-09-04 17:47:45,456 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 72 states. [2020-09-04 17:47:50,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:50,378 INFO L93 Difference]: Finished difference Result 201 states and 201 transitions. [2020-09-04 17:47:50,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-09-04 17:47:50,379 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 186 [2020-09-04 17:47:50,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:50,380 INFO L225 Difference]: With dead ends: 201 [2020-09-04 17:47:50,381 INFO L226 Difference]: Without dead ends: 195 [2020-09-04 17:47:50,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3467 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-09-04 17:47:50,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-09-04 17:47:50,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2020-09-04 17:47:50,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-09-04 17:47:50,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 192 transitions. [2020-09-04 17:47:50,389 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 192 transitions. Word has length 186 [2020-09-04 17:47:50,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:50,389 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 192 transitions. [2020-09-04 17:47:50,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-09-04 17:47:50,390 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 192 transitions. [2020-09-04 17:47:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-09-04 17:47:50,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:50,391 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:47:50,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-04 17:47:50,392 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:50,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:50,392 INFO L82 PathProgramCache]: Analyzing trace with hash -61637801, now seen corresponding path program 35 times [2020-09-04 17:47:50,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:50,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893654887] [2020-09-04 17:47:50,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:50,397 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:53,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:47:53,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:47:53,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:47:53,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893654887] [2020-09-04 17:47:53,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:47:53,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2020-09-04 17:47:53,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143147391] [2020-09-04 17:47:53,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-09-04 17:47:53,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:47:53,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-09-04 17:47:53,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2020-09-04 17:47:53,686 INFO L87 Difference]: Start difference. First operand 192 states and 192 transitions. Second operand 74 states. [2020-09-04 17:47:58,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:47:58,926 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2020-09-04 17:47:58,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-09-04 17:47:58,928 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 191 [2020-09-04 17:47:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:47:58,929 INFO L225 Difference]: With dead ends: 206 [2020-09-04 17:47:58,929 INFO L226 Difference]: Without dead ends: 200 [2020-09-04 17:47:58,931 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=6480, Invalid=14112, Unknown=0, NotChecked=0, Total=20592 [2020-09-04 17:47:58,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-09-04 17:47:58,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2020-09-04 17:47:58,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-09-04 17:47:58,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2020-09-04 17:47:58,938 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 191 [2020-09-04 17:47:58,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:47:58,938 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2020-09-04 17:47:58,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-09-04 17:47:58,938 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2020-09-04 17:47:58,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-09-04 17:47:58,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:47:58,940 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:47:58,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-04 17:47:58,940 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:47:58,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:47:58,940 INFO L82 PathProgramCache]: Analyzing trace with hash -772220423, now seen corresponding path program 36 times [2020-09-04 17:47:58,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:47:58,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195881929] [2020-09-04 17:47:58,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:47:58,950 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:47:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:02,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:02,603 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 17:48:02,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195881929] [2020-09-04 17:48:02,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:02,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2020-09-04 17:48:02,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644234752] [2020-09-04 17:48:02,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-09-04 17:48:02,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-09-04 17:48:02,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-09-04 17:48:02,610 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand 76 states. [2020-09-04 17:48:08,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:08,236 INFO L93 Difference]: Finished difference Result 211 states and 211 transitions. [2020-09-04 17:48:08,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-09-04 17:48:08,238 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 196 [2020-09-04 17:48:08,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:08,239 INFO L225 Difference]: With dead ends: 211 [2020-09-04 17:48:08,240 INFO L226 Difference]: Without dead ends: 205 [2020-09-04 17:48:08,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3887 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-09-04 17:48:08,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-09-04 17:48:08,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2020-09-04 17:48:08,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-09-04 17:48:08,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 202 transitions. [2020-09-04 17:48:08,248 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 202 transitions. Word has length 196 [2020-09-04 17:48:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:08,249 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 202 transitions. [2020-09-04 17:48:08,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-09-04 17:48:08,249 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 202 transitions. [2020-09-04 17:48:08,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-09-04 17:48:08,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:08,250 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:48:08,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-04 17:48:08,251 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:08,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:08,251 INFO L82 PathProgramCache]: Analyzing trace with hash 930042007, now seen corresponding path program 37 times [2020-09-04 17:48:08,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:08,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116352341] [2020-09-04 17:48:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:08,261 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:12,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:12,098 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 17:48:12,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116352341] [2020-09-04 17:48:12,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:12,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2020-09-04 17:48:12,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595454760] [2020-09-04 17:48:12,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-09-04 17:48:12,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:12,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-09-04 17:48:12,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2020-09-04 17:48:12,100 INFO L87 Difference]: Start difference. First operand 202 states and 202 transitions. Second operand 78 states. [2020-09-04 17:48:18,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:18,304 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2020-09-04 17:48:18,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-09-04 17:48:18,305 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 201 [2020-09-04 17:48:18,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:18,307 INFO L225 Difference]: With dead ends: 216 [2020-09-04 17:48:18,307 INFO L226 Difference]: Without dead ends: 210 [2020-09-04 17:48:18,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=7220, Invalid=15732, Unknown=0, NotChecked=0, Total=22952 [2020-09-04 17:48:18,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-09-04 17:48:18,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-09-04 17:48:18,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-09-04 17:48:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2020-09-04 17:48:18,316 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 201 [2020-09-04 17:48:18,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:18,316 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2020-09-04 17:48:18,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-09-04 17:48:18,316 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2020-09-04 17:48:18,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-09-04 17:48:18,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:18,318 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:48:18,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-04 17:48:18,318 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:18,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:18,318 INFO L82 PathProgramCache]: Analyzing trace with hash 892357817, now seen corresponding path program 38 times [2020-09-04 17:48:18,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:18,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994475975] [2020-09-04 17:48:18,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:18,326 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:22,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:22,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:22,529 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 17:48:22,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994475975] [2020-09-04 17:48:22,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:22,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2020-09-04 17:48:22,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118839141] [2020-09-04 17:48:22,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-09-04 17:48:22,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:22,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-09-04 17:48:22,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-09-04 17:48:22,532 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand 80 states. [2020-09-04 17:48:29,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:29,307 INFO L93 Difference]: Finished difference Result 221 states and 221 transitions. [2020-09-04 17:48:29,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-09-04 17:48:29,309 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 206 [2020-09-04 17:48:29,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:29,310 INFO L225 Difference]: With dead ends: 221 [2020-09-04 17:48:29,310 INFO L226 Difference]: Without dead ends: 215 [2020-09-04 17:48:29,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4331 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-09-04 17:48:29,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-09-04 17:48:29,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-09-04 17:48:29,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-09-04 17:48:29,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 212 transitions. [2020-09-04 17:48:29,322 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 212 transitions. Word has length 206 [2020-09-04 17:48:29,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:29,322 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 212 transitions. [2020-09-04 17:48:29,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-09-04 17:48:29,323 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 212 transitions. [2020-09-04 17:48:29,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-09-04 17:48:29,324 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:29,324 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:48:29,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-04 17:48:29,324 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:29,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:29,325 INFO L82 PathProgramCache]: Analyzing trace with hash 246519255, now seen corresponding path program 39 times [2020-09-04 17:48:29,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:29,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71514416] [2020-09-04 17:48:29,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:29,334 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:29,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:33,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:33,810 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 17:48:33,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71514416] [2020-09-04 17:48:33,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:33,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2020-09-04 17:48:33,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904489399] [2020-09-04 17:48:33,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-09-04 17:48:33,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:33,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-09-04 17:48:33,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2020-09-04 17:48:33,814 INFO L87 Difference]: Start difference. First operand 212 states and 212 transitions. Second operand 82 states. [2020-09-04 17:48:41,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:41,143 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2020-09-04 17:48:41,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-09-04 17:48:41,144 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 211 [2020-09-04 17:48:41,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:41,146 INFO L225 Difference]: With dead ends: 226 [2020-09-04 17:48:41,146 INFO L226 Difference]: Without dead ends: 220 [2020-09-04 17:48:41,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4562 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=8000, Invalid=17440, Unknown=0, NotChecked=0, Total=25440 [2020-09-04 17:48:41,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-09-04 17:48:41,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-09-04 17:48:41,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-09-04 17:48:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2020-09-04 17:48:41,152 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 211 [2020-09-04 17:48:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:41,152 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2020-09-04 17:48:41,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-09-04 17:48:41,153 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2020-09-04 17:48:41,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-09-04 17:48:41,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:41,154 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:48:41,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-04 17:48:41,154 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:41,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:41,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1027125383, now seen corresponding path program 40 times [2020-09-04 17:48:41,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:41,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885046741] [2020-09-04 17:48:41,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:41,158 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:41,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:45,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:46,010 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 17:48:46,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885046741] [2020-09-04 17:48:46,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:46,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2020-09-04 17:48:46,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435355231] [2020-09-04 17:48:46,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-09-04 17:48:46,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:46,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-09-04 17:48:46,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-09-04 17:48:46,013 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand 84 states. [2020-09-04 17:48:53,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:48:53,927 INFO L93 Difference]: Finished difference Result 231 states and 231 transitions. [2020-09-04 17:48:53,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-09-04 17:48:53,928 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 216 [2020-09-04 17:48:53,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:48:53,930 INFO L225 Difference]: With dead ends: 231 [2020-09-04 17:48:53,930 INFO L226 Difference]: Without dead ends: 225 [2020-09-04 17:48:53,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4799 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-09-04 17:48:53,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-09-04 17:48:53,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-09-04 17:48:53,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-09-04 17:48:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 222 transitions. [2020-09-04 17:48:53,950 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 222 transitions. Word has length 216 [2020-09-04 17:48:53,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:48:53,951 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 222 transitions. [2020-09-04 17:48:53,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-09-04 17:48:53,951 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 222 transitions. [2020-09-04 17:48:53,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-09-04 17:48:53,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:48:53,953 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:48:53,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-04 17:48:53,953 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:48:53,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:48:53,954 INFO L82 PathProgramCache]: Analyzing trace with hash 416172823, now seen corresponding path program 41 times [2020-09-04 17:48:53,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:48:53,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [287580925] [2020-09-04 17:48:53,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:48:53,960 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:48:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:59,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:48:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:48:59,263 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 17:48:59,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [287580925] [2020-09-04 17:48:59,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:48:59,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2020-09-04 17:48:59,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011597969] [2020-09-04 17:48:59,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-09-04 17:48:59,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:48:59,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-09-04 17:48:59,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2020-09-04 17:48:59,265 INFO L87 Difference]: Start difference. First operand 222 states and 222 transitions. Second operand 86 states. [2020-09-04 17:49:07,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:07,944 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2020-09-04 17:49:07,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-09-04 17:49:07,945 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 221 [2020-09-04 17:49:07,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:07,947 INFO L225 Difference]: With dead ends: 236 [2020-09-04 17:49:07,947 INFO L226 Difference]: Without dead ends: 230 [2020-09-04 17:49:07,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5042 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=8820, Invalid=19236, Unknown=0, NotChecked=0, Total=28056 [2020-09-04 17:49:07,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-09-04 17:49:07,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2020-09-04 17:49:07,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-09-04 17:49:07,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2020-09-04 17:49:07,957 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 221 [2020-09-04 17:49:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:07,957 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2020-09-04 17:49:07,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-09-04 17:49:07,958 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2020-09-04 17:49:07,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-09-04 17:49:07,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:07,960 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:07,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-09-04 17:49:07,960 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:07,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:07,960 INFO L82 PathProgramCache]: Analyzing trace with hash -192290247, now seen corresponding path program 42 times [2020-09-04 17:49:07,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:07,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87403987] [2020-09-04 17:49:07,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:07,969 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:13,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:13,775 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 17:49:13,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87403987] [2020-09-04 17:49:13,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:13,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2020-09-04 17:49:13,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092434259] [2020-09-04 17:49:13,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-09-04 17:49:13,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:13,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-09-04 17:49:13,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-09-04 17:49:13,777 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 88 states. [2020-09-04 17:49:23,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:23,621 INFO L93 Difference]: Finished difference Result 241 states and 241 transitions. [2020-09-04 17:49:23,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-09-04 17:49:23,623 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 226 [2020-09-04 17:49:23,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:23,625 INFO L225 Difference]: With dead ends: 241 [2020-09-04 17:49:23,625 INFO L226 Difference]: Without dead ends: 235 [2020-09-04 17:49:23,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5291 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-09-04 17:49:23,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-09-04 17:49:23,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2020-09-04 17:49:23,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-09-04 17:49:23,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 232 transitions. [2020-09-04 17:49:23,634 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 232 transitions. Word has length 226 [2020-09-04 17:49:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:23,634 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 232 transitions. [2020-09-04 17:49:23,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-09-04 17:49:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 232 transitions. [2020-09-04 17:49:23,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-09-04 17:49:23,636 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:23,636 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:23,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-09-04 17:49:23,637 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:23,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:23,637 INFO L82 PathProgramCache]: Analyzing trace with hash 460943447, now seen corresponding path program 43 times [2020-09-04 17:49:23,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:23,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058026380] [2020-09-04 17:49:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:23,644 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:30,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:30,152 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 17:49:30,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058026380] [2020-09-04 17:49:30,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:30,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2020-09-04 17:49:30,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558286179] [2020-09-04 17:49:30,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-09-04 17:49:30,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:30,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-09-04 17:49:30,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2020-09-04 17:49:30,154 INFO L87 Difference]: Start difference. First operand 232 states and 232 transitions. Second operand 90 states. [2020-09-04 17:49:40,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:40,237 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2020-09-04 17:49:40,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-09-04 17:49:40,239 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 231 [2020-09-04 17:49:40,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:40,241 INFO L225 Difference]: With dead ends: 246 [2020-09-04 17:49:40,242 INFO L226 Difference]: Without dead ends: 240 [2020-09-04 17:49:40,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5546 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=9680, Invalid=21120, Unknown=0, NotChecked=0, Total=30800 [2020-09-04 17:49:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-09-04 17:49:40,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 237. [2020-09-04 17:49:40,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-09-04 17:49:40,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2020-09-04 17:49:40,251 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 231 [2020-09-04 17:49:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:40,252 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2020-09-04 17:49:40,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-09-04 17:49:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2020-09-04 17:49:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-09-04 17:49:40,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:40,254 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:40,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-09-04 17:49:40,254 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:40,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:40,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1967391993, now seen corresponding path program 44 times [2020-09-04 17:49:40,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:40,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327374784] [2020-09-04 17:49:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:40,262 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:40,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:47,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:49:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:49:47,234 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 17:49:47,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327374784] [2020-09-04 17:49:47,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:49:47,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2020-09-04 17:49:47,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917467275] [2020-09-04 17:49:47,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-09-04 17:49:47,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:49:47,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-09-04 17:49:47,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-09-04 17:49:47,237 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand 92 states. [2020-09-04 17:49:59,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:49:59,015 INFO L93 Difference]: Finished difference Result 251 states and 251 transitions. [2020-09-04 17:49:59,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-09-04 17:49:59,017 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 236 [2020-09-04 17:49:59,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:49:59,020 INFO L225 Difference]: With dead ends: 251 [2020-09-04 17:49:59,020 INFO L226 Difference]: Without dead ends: 245 [2020-09-04 17:49:59,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-09-04 17:49:59,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-04 17:49:59,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 242. [2020-09-04 17:49:59,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-09-04 17:49:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 242 transitions. [2020-09-04 17:49:59,030 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 242 transitions. Word has length 236 [2020-09-04 17:49:59,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:49:59,031 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 242 transitions. [2020-09-04 17:49:59,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-09-04 17:49:59,031 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 242 transitions. [2020-09-04 17:49:59,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-09-04 17:49:59,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:49:59,033 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:49:59,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-09-04 17:49:59,033 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:49:59,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:49:59,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1265042839, now seen corresponding path program 45 times [2020-09-04 17:49:59,034 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:49:59,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1104607670] [2020-09-04 17:49:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:49:59,045 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:49:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:07,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:50:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:07,368 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 17:50:07,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1104607670] [2020-09-04 17:50:07,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:50:07,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2020-09-04 17:50:07,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088369491] [2020-09-04 17:50:07,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 94 states [2020-09-04 17:50:07,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:50:07,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2020-09-04 17:50:07,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2020-09-04 17:50:07,373 INFO L87 Difference]: Start difference. First operand 242 states and 242 transitions. Second operand 94 states. [2020-09-04 17:50:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:50:20,120 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2020-09-04 17:50:20,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2020-09-04 17:50:20,122 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 241 [2020-09-04 17:50:20,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:50:20,124 INFO L225 Difference]: With dead ends: 256 [2020-09-04 17:50:20,124 INFO L226 Difference]: Without dead ends: 250 [2020-09-04 17:50:20,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6074 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=10580, Invalid=23092, Unknown=0, NotChecked=0, Total=33672 [2020-09-04 17:50:20,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-09-04 17:50:20,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2020-09-04 17:50:20,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-09-04 17:50:20,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2020-09-04 17:50:20,135 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 241 [2020-09-04 17:50:20,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:50:20,136 INFO L479 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2020-09-04 17:50:20,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 94 states. [2020-09-04 17:50:20,136 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2020-09-04 17:50:20,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-09-04 17:50:20,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:50:20,138 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:50:20,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-09-04 17:50:20,138 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:50:20,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:50:20,139 INFO L82 PathProgramCache]: Analyzing trace with hash -524175431, now seen corresponding path program 46 times [2020-09-04 17:50:20,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:50:20,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507608011] [2020-09-04 17:50:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:50:20,146 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:50:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:28,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:50:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:28,819 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 17:50:28,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507608011] [2020-09-04 17:50:28,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:50:28,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2020-09-04 17:50:28,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065164262] [2020-09-04 17:50:28,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-09-04 17:50:28,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:50:28,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-09-04 17:50:28,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-09-04 17:50:28,823 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand 96 states. [2020-09-04 17:50:42,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:50:42,844 INFO L93 Difference]: Finished difference Result 261 states and 261 transitions. [2020-09-04 17:50:42,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2020-09-04 17:50:42,846 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 246 [2020-09-04 17:50:42,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:50:42,848 INFO L225 Difference]: With dead ends: 261 [2020-09-04 17:50:42,849 INFO L226 Difference]: Without dead ends: 255 [2020-09-04 17:50:42,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6347 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-09-04 17:50:42,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-09-04 17:50:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2020-09-04 17:50:42,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-09-04 17:50:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 252 transitions. [2020-09-04 17:50:42,864 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 252 transitions. Word has length 246 [2020-09-04 17:50:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:50:42,865 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 252 transitions. [2020-09-04 17:50:42,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-09-04 17:50:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 252 transitions. [2020-09-04 17:50:42,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-09-04 17:50:42,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:50:42,867 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:50:42,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-09-04 17:50:42,868 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:50:42,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:50:42,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1941239081, now seen corresponding path program 47 times [2020-09-04 17:50:42,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:50:42,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440377121] [2020-09-04 17:50:42,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:50:42,879 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:50:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:52,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:50:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:50:52,972 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 17:50:52,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440377121] [2020-09-04 17:50:52,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:50:52,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2020-09-04 17:50:52,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571253787] [2020-09-04 17:50:52,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 98 states [2020-09-04 17:50:52,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:50:52,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2020-09-04 17:50:52,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2402, Invalid=7104, Unknown=0, NotChecked=0, Total=9506 [2020-09-04 17:50:52,975 INFO L87 Difference]: Start difference. First operand 252 states and 252 transitions. Second operand 98 states. [2020-09-04 17:51:08,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:51:08,388 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2020-09-04 17:51:08,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-09-04 17:51:08,391 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 251 [2020-09-04 17:51:08,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:51:08,393 INFO L225 Difference]: With dead ends: 266 [2020-09-04 17:51:08,393 INFO L226 Difference]: Without dead ends: 260 [2020-09-04 17:51:08,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6626 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=11520, Invalid=25152, Unknown=0, NotChecked=0, Total=36672 [2020-09-04 17:51:08,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-04 17:51:08,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 257. [2020-09-04 17:51:08,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-09-04 17:51:08,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2020-09-04 17:51:08,404 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 251 [2020-09-04 17:51:08,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:51:08,405 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2020-09-04 17:51:08,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 98 states. [2020-09-04 17:51:08,405 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2020-09-04 17:51:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-09-04 17:51:08,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:51:08,408 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:51:08,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-09-04 17:51:08,408 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:51:08,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:51:08,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2083587463, now seen corresponding path program 48 times [2020-09-04 17:51:08,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:51:08,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267993545] [2020-09-04 17:51:08,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:51:08,421 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:51:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:51:19,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:51:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:51:19,145 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 17:51:19,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267993545] [2020-09-04 17:51:19,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:51:19,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2020-09-04 17:51:19,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769100524] [2020-09-04 17:51:19,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-09-04 17:51:19,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:51:19,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-09-04 17:51:19,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-09-04 17:51:19,148 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand 100 states. [2020-09-04 17:51:36,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:51:36,536 INFO L93 Difference]: Finished difference Result 271 states and 271 transitions. [2020-09-04 17:51:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2020-09-04 17:51:36,539 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 256 [2020-09-04 17:51:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:51:36,540 INFO L225 Difference]: With dead ends: 271 [2020-09-04 17:51:36,541 INFO L226 Difference]: Without dead ends: 265 [2020-09-04 17:51:36,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6911 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-09-04 17:51:36,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-09-04 17:51:36,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 262. [2020-09-04 17:51:36,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-09-04 17:51:36,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 262 transitions. [2020-09-04 17:51:36,551 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 262 transitions. Word has length 256 [2020-09-04 17:51:36,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:51:36,552 INFO L479 AbstractCegarLoop]: Abstraction has 262 states and 262 transitions. [2020-09-04 17:51:36,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-09-04 17:51:36,552 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 262 transitions. [2020-09-04 17:51:36,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-09-04 17:51:36,554 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:51:36,554 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:51:36,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-09-04 17:51:36,555 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:51:36,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:51:36,555 INFO L82 PathProgramCache]: Analyzing trace with hash -1327923177, now seen corresponding path program 49 times [2020-09-04 17:51:36,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:51:36,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432764608] [2020-09-04 17:51:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:51:36,569 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:51:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:51:48,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:51:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:51:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:51:48,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432764608] [2020-09-04 17:51:48,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:51:48,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2020-09-04 17:51:48,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121641713] [2020-09-04 17:51:48,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-09-04 17:51:48,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:51:48,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-09-04 17:51:48,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2602, Invalid=7700, Unknown=0, NotChecked=0, Total=10302 [2020-09-04 17:51:48,124 INFO L87 Difference]: Start difference. First operand 262 states and 262 transitions. Second operand 102 states. [2020-09-04 17:52:07,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:52:07,251 INFO L93 Difference]: Finished difference Result 276 states and 276 transitions. [2020-09-04 17:52:07,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-09-04 17:52:07,254 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 261 [2020-09-04 17:52:07,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:52:07,257 INFO L225 Difference]: With dead ends: 276 [2020-09-04 17:52:07,257 INFO L226 Difference]: Without dead ends: 270 [2020-09-04 17:52:07,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7202 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=12500, Invalid=27300, Unknown=0, NotChecked=0, Total=39800 [2020-09-04 17:52:07,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-09-04 17:52:07,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 267. [2020-09-04 17:52:07,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-09-04 17:52:07,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2020-09-04 17:52:07,268 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 261 [2020-09-04 17:52:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:52:07,269 INFO L479 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2020-09-04 17:52:07,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-09-04 17:52:07,269 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2020-09-04 17:52:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-09-04 17:52:07,271 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:52:07,272 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:52:07,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-09-04 17:52:07,272 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:52:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:52:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash 473419065, now seen corresponding path program 50 times [2020-09-04 17:52:07,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:52:07,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044481727] [2020-09-04 17:52:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:52:07,285 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:52:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:52:20,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:52:20,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:52:20,150 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 17:52:20,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044481727] [2020-09-04 17:52:20,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:52:20,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2020-09-04 17:52:20,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801508867] [2020-09-04 17:52:20,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-09-04 17:52:20,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:52:20,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-09-04 17:52:20,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-09-04 17:52:20,154 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 104 states. [2020-09-04 17:52:41,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:52:41,924 INFO L93 Difference]: Finished difference Result 281 states and 281 transitions. [2020-09-04 17:52:41,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2020-09-04 17:52:41,928 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 266 [2020-09-04 17:52:41,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:52:41,931 INFO L225 Difference]: With dead ends: 281 [2020-09-04 17:52:41,931 INFO L226 Difference]: Without dead ends: 275 [2020-09-04 17:52:41,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7499 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-09-04 17:52:41,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-09-04 17:52:41,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 272. [2020-09-04 17:52:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-09-04 17:52:41,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 272 transitions. [2020-09-04 17:52:41,943 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 272 transitions. Word has length 266 [2020-09-04 17:52:41,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:52:41,944 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 272 transitions. [2020-09-04 17:52:41,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-09-04 17:52:41,944 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 272 transitions. [2020-09-04 17:52:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-09-04 17:52:41,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:52:41,947 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:52:41,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-09-04 17:52:41,947 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:52:41,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:52:41,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1161403049, now seen corresponding path program 51 times [2020-09-04 17:52:41,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:52:41,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657402127] [2020-09-04 17:52:41,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:52:41,957 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:52:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:52:55,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:52:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:52:56,030 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 17:52:56,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657402127] [2020-09-04 17:52:56,031 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:52:56,031 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2020-09-04 17:52:56,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432702134] [2020-09-04 17:52:56,032 INFO L459 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-09-04 17:52:56,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:52:56,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-09-04 17:52:56,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=8320, Unknown=0, NotChecked=0, Total=11130 [2020-09-04 17:52:56,033 INFO L87 Difference]: Start difference. First operand 272 states and 272 transitions. Second operand 106 states. [2020-09-04 17:53:19,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:53:19,448 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2020-09-04 17:53:19,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2020-09-04 17:53:19,452 INFO L78 Accepts]: Start accepts. Automaton has 106 states. Word has length 271 [2020-09-04 17:53:19,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:53:19,454 INFO L225 Difference]: With dead ends: 286 [2020-09-04 17:53:19,454 INFO L226 Difference]: Without dead ends: 280 [2020-09-04 17:53:19,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7802 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=13520, Invalid=29536, Unknown=0, NotChecked=0, Total=43056 [2020-09-04 17:53:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-09-04 17:53:19,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 277. [2020-09-04 17:53:19,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-09-04 17:53:19,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2020-09-04 17:53:19,465 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 271 [2020-09-04 17:53:19,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:53:19,465 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2020-09-04 17:53:19,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 106 states. [2020-09-04 17:53:19,466 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2020-09-04 17:53:19,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-09-04 17:53:19,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:53:19,468 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:53:19,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-09-04 17:53:19,468 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:53:19,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:53:19,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1731710983, now seen corresponding path program 52 times [2020-09-04 17:53:19,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:53:19,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921523584] [2020-09-04 17:53:19,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:53:19,479 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:53:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:53:34,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:53:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:53:35,061 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 17:53:35,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921523584] [2020-09-04 17:53:35,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:53:35,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2020-09-04 17:53:35,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52874104] [2020-09-04 17:53:35,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 108 states [2020-09-04 17:53:35,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:53:35,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2020-09-04 17:53:35,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2917, Invalid=8639, Unknown=0, NotChecked=0, Total=11556 [2020-09-04 17:53:35,063 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand 108 states. [2020-09-04 17:54:01,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:54:01,165 INFO L93 Difference]: Finished difference Result 291 states and 291 transitions. [2020-09-04 17:54:01,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2020-09-04 17:54:01,169 INFO L78 Accepts]: Start accepts. Automaton has 108 states. Word has length 276 [2020-09-04 17:54:01,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:54:01,171 INFO L225 Difference]: With dead ends: 291 [2020-09-04 17:54:01,171 INFO L226 Difference]: Without dead ends: 285 [2020-09-04 17:54:01,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8111 ImplicationChecksByTransitivity, 39.4s TimeCoverageRelationStatistics Valid=14045, Invalid=30687, Unknown=0, NotChecked=0, Total=44732 [2020-09-04 17:54:01,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-09-04 17:54:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 282. [2020-09-04 17:54:01,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-09-04 17:54:01,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 282 transitions. [2020-09-04 17:54:01,180 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 282 transitions. Word has length 276 [2020-09-04 17:54:01,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:54:01,180 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 282 transitions. [2020-09-04 17:54:01,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 108 states. [2020-09-04 17:54:01,180 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 282 transitions. [2020-09-04 17:54:01,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-09-04 17:54:01,182 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:54:01,182 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:54:01,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-09-04 17:54:01,183 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:54:01,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:54:01,183 INFO L82 PathProgramCache]: Analyzing trace with hash 449165975, now seen corresponding path program 53 times [2020-09-04 17:54:01,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:54:01,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501186394] [2020-09-04 17:54:01,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:54:01,195 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:54:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:54:18,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:54:18,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:54:18,613 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 17:54:18,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501186394] [2020-09-04 17:54:18,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:54:18,614 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2020-09-04 17:54:18,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745155960] [2020-09-04 17:54:18,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 110 states [2020-09-04 17:54:18,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:54:18,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2020-09-04 17:54:18,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3026, Invalid=8964, Unknown=0, NotChecked=0, Total=11990 [2020-09-04 17:54:18,617 INFO L87 Difference]: Start difference. First operand 282 states and 282 transitions. Second operand 110 states. [2020-09-04 17:54:46,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:54:46,750 INFO L93 Difference]: Finished difference Result 296 states and 296 transitions. [2020-09-04 17:54:46,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2020-09-04 17:54:46,753 INFO L78 Accepts]: Start accepts. Automaton has 110 states. Word has length 281 [2020-09-04 17:54:46,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:54:46,755 INFO L225 Difference]: With dead ends: 296 [2020-09-04 17:54:46,755 INFO L226 Difference]: Without dead ends: 290 [2020-09-04 17:54:46,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8426 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=14580, Invalid=31860, Unknown=0, NotChecked=0, Total=46440 [2020-09-04 17:54:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-09-04 17:54:46,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 287. [2020-09-04 17:54:46,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-09-04 17:54:46,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2020-09-04 17:54:46,764 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 281 [2020-09-04 17:54:46,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:54:46,764 INFO L479 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2020-09-04 17:54:46,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 110 states. [2020-09-04 17:54:46,764 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2020-09-04 17:54:46,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-09-04 17:54:46,766 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:54:46,766 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:54:46,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-09-04 17:54:46,766 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:54:46,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:54:46,767 INFO L82 PathProgramCache]: Analyzing trace with hash -649321799, now seen corresponding path program 54 times [2020-09-04 17:54:46,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:54:46,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694508158] [2020-09-04 17:54:46,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:54:46,773 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:54:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:55:06,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:55:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:55:06,539 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 17:55:06,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694508158] [2020-09-04 17:55:06,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:55:06,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2020-09-04 17:55:06,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137788774] [2020-09-04 17:55:06,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 112 states [2020-09-04 17:55:06,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:55:06,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2020-09-04 17:55:06,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3137, Invalid=9295, Unknown=0, NotChecked=0, Total=12432 [2020-09-04 17:55:06,542 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand 112 states. [2020-09-04 17:55:38,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:55:38,479 INFO L93 Difference]: Finished difference Result 301 states and 301 transitions. [2020-09-04 17:55:38,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-09-04 17:55:38,483 INFO L78 Accepts]: Start accepts. Automaton has 112 states. Word has length 286 [2020-09-04 17:55:38,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:55:38,485 INFO L225 Difference]: With dead ends: 301 [2020-09-04 17:55:38,486 INFO L226 Difference]: Without dead ends: 295 [2020-09-04 17:55:38,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8747 ImplicationChecksByTransitivity, 48.2s TimeCoverageRelationStatistics Valid=15125, Invalid=33055, Unknown=0, NotChecked=0, Total=48180 [2020-09-04 17:55:38,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-09-04 17:55:38,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 292. [2020-09-04 17:55:38,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-09-04 17:55:38,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 292 transitions. [2020-09-04 17:55:38,497 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 292 transitions. Word has length 286 [2020-09-04 17:55:38,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:55:38,497 INFO L479 AbstractCegarLoop]: Abstraction has 292 states and 292 transitions. [2020-09-04 17:55:38,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 112 states. [2020-09-04 17:55:38,498 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 292 transitions. [2020-09-04 17:55:38,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-09-04 17:55:38,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:55:38,500 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:55:38,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-09-04 17:55:38,501 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:55:38,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:55:38,501 INFO L82 PathProgramCache]: Analyzing trace with hash -259293225, now seen corresponding path program 55 times [2020-09-04 17:55:38,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:55:38,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82385926] [2020-09-04 17:55:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:55:38,510 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:55:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:55:59,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:55:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:55:59,926 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 17:55:59,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82385926] [2020-09-04 17:55:59,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:55:59,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2020-09-04 17:55:59,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441308236] [2020-09-04 17:55:59,928 INFO L459 AbstractCegarLoop]: Interpolant automaton has 114 states [2020-09-04 17:55:59,928 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:55:59,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2020-09-04 17:55:59,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3250, Invalid=9632, Unknown=0, NotChecked=0, Total=12882 [2020-09-04 17:55:59,929 INFO L87 Difference]: Start difference. First operand 292 states and 292 transitions. Second operand 114 states. [2020-09-04 17:56:31,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:56:31,462 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2020-09-04 17:56:31,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2020-09-04 17:56:31,465 INFO L78 Accepts]: Start accepts. Automaton has 114 states. Word has length 291 [2020-09-04 17:56:31,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:56:31,466 INFO L225 Difference]: With dead ends: 306 [2020-09-04 17:56:31,466 INFO L226 Difference]: Without dead ends: 300 [2020-09-04 17:56:31,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9074 ImplicationChecksByTransitivity, 49.6s TimeCoverageRelationStatistics Valid=15680, Invalid=34272, Unknown=0, NotChecked=0, Total=49952 [2020-09-04 17:56:31,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-09-04 17:56:31,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 297. [2020-09-04 17:56:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-09-04 17:56:31,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2020-09-04 17:56:31,476 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 291 [2020-09-04 17:56:31,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:56:31,477 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2020-09-04 17:56:31,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 114 states. [2020-09-04 17:56:31,477 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2020-09-04 17:56:31,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-09-04 17:56:31,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:56:31,479 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:56:31,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-09-04 17:56:31,480 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:56:31,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:56:31,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1854907769, now seen corresponding path program 56 times [2020-09-04 17:56:31,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:56:31,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871955088] [2020-09-04 17:56:31,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:56:31,491 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:56:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:47,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:56:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:56:47,061 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 17:56:47,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871955088] [2020-09-04 17:56:47,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:56:47,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2020-09-04 17:56:47,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411514191] [2020-09-04 17:56:47,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 116 states [2020-09-04 17:56:47,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:56:47,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2020-09-04 17:56:47,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3365, Invalid=9975, Unknown=0, NotChecked=0, Total=13340 [2020-09-04 17:56:47,064 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand 116 states. [2020-09-04 17:57:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:57:09,274 INFO L93 Difference]: Finished difference Result 311 states and 311 transitions. [2020-09-04 17:57:09,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2020-09-04 17:57:09,278 INFO L78 Accepts]: Start accepts. Automaton has 116 states. Word has length 296 [2020-09-04 17:57:09,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:57:09,280 INFO L225 Difference]: With dead ends: 311 [2020-09-04 17:57:09,280 INFO L226 Difference]: Without dead ends: 305 [2020-09-04 17:57:09,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9407 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=16245, Invalid=35511, Unknown=0, NotChecked=0, Total=51756 [2020-09-04 17:57:09,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-09-04 17:57:09,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 302. [2020-09-04 17:57:09,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-09-04 17:57:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 302 transitions. [2020-09-04 17:57:09,288 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 302 transitions. Word has length 296 [2020-09-04 17:57:09,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:57:09,289 INFO L479 AbstractCegarLoop]: Abstraction has 302 states and 302 transitions. [2020-09-04 17:57:09,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 116 states. [2020-09-04 17:57:09,289 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 302 transitions. [2020-09-04 17:57:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-09-04 17:57:09,291 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:57:09,292 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:57:09,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-09-04 17:57:09,292 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:57:09,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:57:09,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1254864151, now seen corresponding path program 57 times [2020-09-04 17:57:09,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:57:09,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654781212] [2020-09-04 17:57:09,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:57:09,301 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:57:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:26,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:57:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:57:26,430 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 17:57:26,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654781212] [2020-09-04 17:57:26,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:57:26,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2020-09-04 17:57:26,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337632677] [2020-09-04 17:57:26,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 118 states [2020-09-04 17:57:26,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:57:26,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2020-09-04 17:57:26,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3482, Invalid=10324, Unknown=0, NotChecked=0, Total=13806 [2020-09-04 17:57:26,433 INFO L87 Difference]: Start difference. First operand 302 states and 302 transitions. Second operand 118 states. [2020-09-04 17:57:54,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:57:54,622 INFO L93 Difference]: Finished difference Result 316 states and 316 transitions. [2020-09-04 17:57:54,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2020-09-04 17:57:54,626 INFO L78 Accepts]: Start accepts. Automaton has 118 states. Word has length 301 [2020-09-04 17:57:54,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:57:54,629 INFO L225 Difference]: With dead ends: 316 [2020-09-04 17:57:54,629 INFO L226 Difference]: Without dead ends: 310 [2020-09-04 17:57:54,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9746 ImplicationChecksByTransitivity, 42.3s TimeCoverageRelationStatistics Valid=16820, Invalid=36772, Unknown=0, NotChecked=0, Total=53592 [2020-09-04 17:57:54,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-09-04 17:57:54,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 307. [2020-09-04 17:57:54,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-09-04 17:57:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2020-09-04 17:57:54,639 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 301 [2020-09-04 17:57:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:57:54,640 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2020-09-04 17:57:54,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 118 states. [2020-09-04 17:57:54,640 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2020-09-04 17:57:54,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-09-04 17:57:54,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:57:54,642 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:57:54,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-09-04 17:57:54,643 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:57:54,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:57:54,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1516156985, now seen corresponding path program 58 times [2020-09-04 17:57:54,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:57:54,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949529617] [2020-09-04 17:57:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:57:54,653 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:57:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:10,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:58:10,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:10,831 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 17:58:10,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949529617] [2020-09-04 17:58:10,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:58:10,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2020-09-04 17:58:10,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584062764] [2020-09-04 17:58:10,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 120 states [2020-09-04 17:58:10,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:58:10,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2020-09-04 17:58:10,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3601, Invalid=10679, Unknown=0, NotChecked=0, Total=14280 [2020-09-04 17:58:10,833 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 120 states. [2020-09-04 17:58:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:58:34,464 INFO L93 Difference]: Finished difference Result 321 states and 321 transitions. [2020-09-04 17:58:34,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2020-09-04 17:58:34,467 INFO L78 Accepts]: Start accepts. Automaton has 120 states. Word has length 306 [2020-09-04 17:58:34,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:58:34,469 INFO L225 Difference]: With dead ends: 321 [2020-09-04 17:58:34,469 INFO L226 Difference]: Without dead ends: 315 [2020-09-04 17:58:34,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 38.1s TimeCoverageRelationStatistics Valid=17405, Invalid=38055, Unknown=0, NotChecked=0, Total=55460 [2020-09-04 17:58:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-09-04 17:58:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 312. [2020-09-04 17:58:34,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-09-04 17:58:34,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 312 transitions. [2020-09-04 17:58:34,477 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 312 transitions. Word has length 306 [2020-09-04 17:58:34,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:58:34,478 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 312 transitions. [2020-09-04 17:58:34,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 120 states. [2020-09-04 17:58:34,478 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 312 transitions. [2020-09-04 17:58:34,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-09-04 17:58:34,480 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:58:34,480 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:58:34,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-09-04 17:58:34,480 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:58:34,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:58:34,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1731877463, now seen corresponding path program 59 times [2020-09-04 17:58:34,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:58:34,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750809860] [2020-09-04 17:58:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:58:34,486 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:58:34,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:49,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:58:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:58:49,442 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 17:58:49,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750809860] [2020-09-04 17:58:49,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:58:49,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2020-09-04 17:58:49,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140726967] [2020-09-04 17:58:49,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 122 states [2020-09-04 17:58:49,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:58:49,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2020-09-04 17:58:49,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3722, Invalid=11040, Unknown=0, NotChecked=0, Total=14762 [2020-09-04 17:58:49,444 INFO L87 Difference]: Start difference. First operand 312 states and 312 transitions. Second operand 122 states.