/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-invgen/fragtest_simple.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:04:23,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:04:23,429 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:04:23,475 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 23:04:23,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 23:04:23,485 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 23:04:23,489 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 23:04:23,494 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 23:04:23,497 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 23:04:23,501 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 23:04:23,502 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 23:04:23,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 23:04:23,503 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:04:23,507 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:04:23,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:04:23,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:04:23,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:04:23,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:04:23,517 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:04:23,526 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:04:23,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:04:23,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:04:23,531 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:04:23,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:04:23,545 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:04:23,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:04:23,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:04:23,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:04:23,570 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 23:04:23,586 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:04:23,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:04:23,589 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:04:23,589 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:04:23,589 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:04:23,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:04:23,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:04:23,590 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:04:23,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:04:23,591 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:04:23,592 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:04:23,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:04:23,592 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:04:23,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:04:23,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:04:23,593 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:04:23,593 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:04:23,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:04:23,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:04:23,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:04:23,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:04:23,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:04:23,595 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 23:04:23,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:04:23,955 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:04:23,962 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:04:23,964 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:04:23,965 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:04:23,966 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2020-08-22 23:04:24,052 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc358947f/8a2cbfb7806e4fbf9556e0a988216dba/FLAG1d80256f5 [2020-08-22 23:04:24,547 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:04:24,548 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/fragtest_simple.i [2020-08-22 23:04:24,555 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc358947f/8a2cbfb7806e4fbf9556e0a988216dba/FLAG1d80256f5 [2020-08-22 23:04:24,902 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc358947f/8a2cbfb7806e4fbf9556e0a988216dba [2020-08-22 23:04:24,912 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:04:24,914 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:04:24,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:04:24,916 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:04:24,920 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:04:24,921 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:04:24" (1/1) ... [2020-08-22 23:04:24,924 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8fa45c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:24, skipping insertion in model container [2020-08-22 23:04:24,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:04:24" (1/1) ... [2020-08-22 23:04:24,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:04:24,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:04:25,193 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:04:25,197 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:04:25,213 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:04:25,225 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:04:25,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:25 WrapperNode [2020-08-22 23:04:25,226 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:04:25,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:04:25,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:04:25,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:04:25,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:25" (1/1) ... [2020-08-22 23:04:25,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:25" (1/1) ... [2020-08-22 23:04:25,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:25" (1/1) ... [2020-08-22 23:04:25,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:25" (1/1) ... [2020-08-22 23:04:25,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:25" (1/1) ... [2020-08-22 23:04:25,253 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:25" (1/1) ... [2020-08-22 23:04:25,336 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:25" (1/1) ... [2020-08-22 23:04:25,340 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:04:25,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:04:25,341 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:04:25,341 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:04:25,342 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:04:25,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:04:25,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:04:25,403 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:04:25,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:04:25,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:04:25,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:04:25,404 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:04:25,404 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:04:25,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:04:25,404 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:04:25,404 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:04:25,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:04:25,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:04:25,703 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:04:25,704 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 23:04:25,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:04:25 BoogieIcfgContainer [2020-08-22 23:04:25,710 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:04:25,712 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:04:25,712 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:04:25,716 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:04:25,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:04:24" (1/3) ... [2020-08-22 23:04:25,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1663faca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:04:25, skipping insertion in model container [2020-08-22 23:04:25,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:04:25" (2/3) ... [2020-08-22 23:04:25,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1663faca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:04:25, skipping insertion in model container [2020-08-22 23:04:25,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:04:25" (3/3) ... [2020-08-22 23:04:25,722 INFO L109 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2020-08-22 23:04:25,736 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:04:25,748 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:04:25,763 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:04:25,790 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:04:25,791 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:04:25,791 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:04:25,791 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:04:25,792 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:04:25,792 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:04:25,792 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:04:25,792 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:04:25,809 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-22 23:04:25,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 23:04:25,827 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:25,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:25,829 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:25,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:25,835 INFO L82 PathProgramCache]: Analyzing trace with hash -815601615, now seen corresponding path program 1 times [2020-08-22 23:04:25,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:25,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827456653] [2020-08-22 23:04:25,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:25,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:25,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:04:25,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827456653] [2020-08-22 23:04:25,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:04:25,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 23:04:25,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406069238] [2020-08-22 23:04:25,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 23:04:25,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:25,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 23:04:25,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:04:25,986 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2020-08-22 23:04:26,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:26,012 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2020-08-22 23:04:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 23:04:26,014 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2020-08-22 23:04:26,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:26,022 INFO L225 Difference]: With dead ends: 76 [2020-08-22 23:04:26,022 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 23:04:26,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:04:26,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 23:04:26,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 23:04:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 23:04:26,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-08-22 23:04:26,070 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 24 [2020-08-22 23:04:26,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:26,071 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-08-22 23:04:26,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 23:04:26,071 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-08-22 23:04:26,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 23:04:26,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:26,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:26,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:04:26,074 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:26,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:26,074 INFO L82 PathProgramCache]: Analyzing trace with hash -2089093357, now seen corresponding path program 1 times [2020-08-22 23:04:26,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:26,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851648443] [2020-08-22 23:04:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:26,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:26,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:04:26,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851648443] [2020-08-22 23:04:26,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:04:26,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 23:04:26,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986320662] [2020-08-22 23:04:26,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:04:26,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:26,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:04:26,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:04:26,242 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 5 states. [2020-08-22 23:04:26,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:26,319 INFO L93 Difference]: Finished difference Result 51 states and 54 transitions. [2020-08-22 23:04:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:04:26,321 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-08-22 23:04:26,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:26,323 INFO L225 Difference]: With dead ends: 51 [2020-08-22 23:04:26,323 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 23:04:26,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:04:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 23:04:26,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-08-22 23:04:26,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 23:04:26,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-08-22 23:04:26,341 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 28 [2020-08-22 23:04:26,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:26,342 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-08-22 23:04:26,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:04:26,342 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-08-22 23:04:26,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 23:04:26,344 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:26,345 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:26,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:04:26,345 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:26,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:26,346 INFO L82 PathProgramCache]: Analyzing trace with hash -594427423, now seen corresponding path program 1 times [2020-08-22 23:04:26,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:26,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254919107] [2020-08-22 23:04:26,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:26,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:26,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 23:04:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:26,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:04:26,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254919107] [2020-08-22 23:04:26,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:04:26,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 23:04:26,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255417728] [2020-08-22 23:04:26,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 23:04:26,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:26,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 23:04:26,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:04:26,457 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 6 states. [2020-08-22 23:04:26,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:26,671 INFO L93 Difference]: Finished difference Result 82 states and 89 transitions. [2020-08-22 23:04:26,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:04:26,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-08-22 23:04:26,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:26,677 INFO L225 Difference]: With dead ends: 82 [2020-08-22 23:04:26,678 INFO L226 Difference]: Without dead ends: 61 [2020-08-22 23:04:26,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:04:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-22 23:04:26,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-08-22 23:04:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-22 23:04:26,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2020-08-22 23:04:26,703 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 38 [2020-08-22 23:04:26,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:26,703 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2020-08-22 23:04:26,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 23:04:26,704 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2020-08-22 23:04:26,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 23:04:26,706 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:26,706 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:26,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:04:26,707 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:26,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:26,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1151378409, now seen corresponding path program 1 times [2020-08-22 23:04:26,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:26,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682940423] [2020-08-22 23:04:26,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:26,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:26,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 23:04:26,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:26,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:04:26,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682940423] [2020-08-22 23:04:26,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:26,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 23:04:26,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349892224] [2020-08-22 23:04:26,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 23:04:26,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:26,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 23:04:26,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:04:26,873 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand 6 states. [2020-08-22 23:04:26,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:26,971 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2020-08-22 23:04:26,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 23:04:26,972 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2020-08-22 23:04:26,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:26,974 INFO L225 Difference]: With dead ends: 67 [2020-08-22 23:04:26,974 INFO L226 Difference]: Without dead ends: 65 [2020-08-22 23:04:26,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:04:26,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-08-22 23:04:26,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-08-22 23:04:26,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 23:04:26,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2020-08-22 23:04:26,990 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 44 [2020-08-22 23:04:26,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:26,990 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2020-08-22 23:04:26,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 23:04:26,991 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2020-08-22 23:04:26,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 23:04:26,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:26,993 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:26,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:04:26,993 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:26,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:26,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1388174135, now seen corresponding path program 2 times [2020-08-22 23:04:26,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:26,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872999977] [2020-08-22 23:04:26,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:27,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:27,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:27,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 23:04:27,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:27,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 23:04:27,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 23:04:27,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872999977] [2020-08-22 23:04:27,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:27,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 23:04:27,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738516113] [2020-08-22 23:04:27,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 23:04:27,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:27,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 23:04:27,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:04:27,187 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 8 states. [2020-08-22 23:04:27,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:27,437 INFO L93 Difference]: Finished difference Result 112 states and 121 transitions. [2020-08-22 23:04:27,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 23:04:27,438 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-22 23:04:27,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:27,439 INFO L225 Difference]: With dead ends: 112 [2020-08-22 23:04:27,440 INFO L226 Difference]: Without dead ends: 85 [2020-08-22 23:04:27,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:04:27,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-08-22 23:04:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2020-08-22 23:04:27,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-08-22 23:04:27,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-08-22 23:04:27,456 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 54 [2020-08-22 23:04:27,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:27,456 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-08-22 23:04:27,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 23:04:27,457 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-08-22 23:04:27,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 23:04:27,458 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:27,459 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:27,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:04:27,459 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:27,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:27,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1511501119, now seen corresponding path program 3 times [2020-08-22 23:04:27,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:27,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871489938] [2020-08-22 23:04:27,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:27,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:27,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:27,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 23:04:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:27,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 23:04:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 14 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 23:04:27,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871489938] [2020-08-22 23:04:27,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:27,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 23:04:27,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116015377] [2020-08-22 23:04:27,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 23:04:27,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:27,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 23:04:27,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:04:27,574 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 9 states. [2020-08-22 23:04:27,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:27,832 INFO L93 Difference]: Finished difference Result 126 states and 138 transitions. [2020-08-22 23:04:27,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 23:04:27,832 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-08-22 23:04:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:27,836 INFO L225 Difference]: With dead ends: 126 [2020-08-22 23:04:27,836 INFO L226 Difference]: Without dead ends: 99 [2020-08-22 23:04:27,837 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:04:27,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-08-22 23:04:27,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 72. [2020-08-22 23:04:27,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 23:04:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-08-22 23:04:27,857 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 60 [2020-08-22 23:04:27,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:27,860 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-08-22 23:04:27,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 23:04:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-08-22 23:04:27,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 23:04:27,862 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:27,862 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:27,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:04:27,865 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:27,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:27,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1048435015, now seen corresponding path program 4 times [2020-08-22 23:04:27,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:27,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364978578] [2020-08-22 23:04:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 23:04:28,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 23:04:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-22 23:04:28,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364978578] [2020-08-22 23:04:28,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:28,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 23:04:28,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120934934] [2020-08-22 23:04:28,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 23:04:28,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:28,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 23:04:28,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 23:04:28,065 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 8 states. [2020-08-22 23:04:28,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:28,158 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-08-22 23:04:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 23:04:28,159 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-08-22 23:04:28,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:28,163 INFO L225 Difference]: With dead ends: 95 [2020-08-22 23:04:28,164 INFO L226 Difference]: Without dead ends: 93 [2020-08-22 23:04:28,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:04:28,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-22 23:04:28,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2020-08-22 23:04:28,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-22 23:04:28,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-08-22 23:04:28,202 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 66 [2020-08-22 23:04:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:28,204 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-08-22 23:04:28,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 23:04:28,205 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-08-22 23:04:28,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 23:04:28,221 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:28,222 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:28,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 23:04:28,223 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:28,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:28,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1426826083, now seen corresponding path program 5 times [2020-08-22 23:04:28,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:28,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980570553] [2020-08-22 23:04:28,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 23:04:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 23:04:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 23:04:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 23:04:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 52 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-22 23:04:28,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980570553] [2020-08-22 23:04:28,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:28,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 23:04:28,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367701650] [2020-08-22 23:04:28,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 23:04:28,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:28,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 23:04:28,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:04:28,454 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 12 states. [2020-08-22 23:04:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:28,781 INFO L93 Difference]: Finished difference Result 168 states and 184 transitions. [2020-08-22 23:04:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 23:04:28,783 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 86 [2020-08-22 23:04:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:28,785 INFO L225 Difference]: With dead ends: 168 [2020-08-22 23:04:28,785 INFO L226 Difference]: Without dead ends: 129 [2020-08-22 23:04:28,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-08-22 23:04:28,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-08-22 23:04:28,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2020-08-22 23:04:28,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-22 23:04:28,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2020-08-22 23:04:28,807 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 86 [2020-08-22 23:04:28,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:28,807 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2020-08-22 23:04:28,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 23:04:28,807 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2020-08-22 23:04:28,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 23:04:28,809 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:28,810 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:28,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 23:04:28,810 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:28,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:28,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1621404309, now seen corresponding path program 6 times [2020-08-22 23:04:28,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:28,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189233382] [2020-08-22 23:04:28,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:28,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 23:04:28,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 23:04:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 23:04:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 23:04:28,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:28,994 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 52 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-22 23:04:28,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189233382] [2020-08-22 23:04:28,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:28,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 23:04:28,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18689950] [2020-08-22 23:04:28,997 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 23:04:28,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:28,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 23:04:28,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:04:28,998 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand 13 states. [2020-08-22 23:04:29,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:29,387 INFO L93 Difference]: Finished difference Result 182 states and 201 transitions. [2020-08-22 23:04:29,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 23:04:29,388 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 92 [2020-08-22 23:04:29,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:29,391 INFO L225 Difference]: With dead ends: 182 [2020-08-22 23:04:29,391 INFO L226 Difference]: Without dead ends: 143 [2020-08-22 23:04:29,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2020-08-22 23:04:29,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-08-22 23:04:29,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 100. [2020-08-22 23:04:29,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-22 23:04:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2020-08-22 23:04:29,415 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 92 [2020-08-22 23:04:29,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:29,416 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2020-08-22 23:04:29,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 23:04:29,416 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2020-08-22 23:04:29,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 23:04:29,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:29,417 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:29,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 23:04:29,418 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:29,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:29,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1859084659, now seen corresponding path program 7 times [2020-08-22 23:04:29,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:29,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790512816] [2020-08-22 23:04:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:29,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:29,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 23:04:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:29,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 23:04:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:29,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 23:04:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:29,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 23:04:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 78 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-22 23:04:29,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790512816] [2020-08-22 23:04:29,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:29,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 23:04:29,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32447093] [2020-08-22 23:04:29,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 23:04:29,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:29,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 23:04:29,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:04:29,538 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand 10 states. [2020-08-22 23:04:29,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:29,634 INFO L93 Difference]: Finished difference Result 123 states and 128 transitions. [2020-08-22 23:04:29,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 23:04:29,634 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 98 [2020-08-22 23:04:29,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:29,636 INFO L225 Difference]: With dead ends: 123 [2020-08-22 23:04:29,636 INFO L226 Difference]: Without dead ends: 121 [2020-08-22 23:04:29,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:04:29,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-08-22 23:04:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2020-08-22 23:04:29,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-08-22 23:04:29,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 121 transitions. [2020-08-22 23:04:29,651 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 121 transitions. Word has length 98 [2020-08-22 23:04:29,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:29,652 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 121 transitions. [2020-08-22 23:04:29,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 23:04:29,652 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 121 transitions. [2020-08-22 23:04:29,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 23:04:29,653 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:29,654 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:29,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 23:04:29,654 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:29,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:29,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1617732209, now seen corresponding path program 8 times [2020-08-22 23:04:29,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:29,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427900656] [2020-08-22 23:04:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:29,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:29,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 23:04:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:29,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 23:04:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:29,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 23:04:29,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:29,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 23:04:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:29,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-22 23:04:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:29,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 23:04:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 112 proven. 70 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2020-08-22 23:04:29,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427900656] [2020-08-22 23:04:29,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:29,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 23:04:29,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116014883] [2020-08-22 23:04:29,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 23:04:29,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:29,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 23:04:29,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:04:29,849 INFO L87 Difference]: Start difference. First operand 116 states and 121 transitions. Second operand 15 states. [2020-08-22 23:04:30,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:30,281 INFO L93 Difference]: Finished difference Result 224 states and 247 transitions. [2020-08-22 23:04:30,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 23:04:30,281 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 118 [2020-08-22 23:04:30,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:30,284 INFO L225 Difference]: With dead ends: 224 [2020-08-22 23:04:30,284 INFO L226 Difference]: Without dead ends: 173 [2020-08-22 23:04:30,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2020-08-22 23:04:30,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-22 23:04:30,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 122. [2020-08-22 23:04:30,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-22 23:04:30,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 127 transitions. [2020-08-22 23:04:30,302 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 127 transitions. Word has length 118 [2020-08-22 23:04:30,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:30,304 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 127 transitions. [2020-08-22 23:04:30,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 23:04:30,307 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 127 transitions. [2020-08-22 23:04:30,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 23:04:30,310 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:30,310 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:30,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 23:04:30,311 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:30,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:30,314 INFO L82 PathProgramCache]: Analyzing trace with hash -581374057, now seen corresponding path program 9 times [2020-08-22 23:04:30,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:30,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318652876] [2020-08-22 23:04:30,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 23:04:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 23:04:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 23:04:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 23:04:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 23:04:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 23:04:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 114 proven. 102 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-08-22 23:04:30,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318652876] [2020-08-22 23:04:30,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:30,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 23:04:30,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193282483] [2020-08-22 23:04:30,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 23:04:30,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:30,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 23:04:30,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:04:30,508 INFO L87 Difference]: Start difference. First operand 122 states and 127 transitions. Second operand 11 states. [2020-08-22 23:04:30,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:30,606 INFO L93 Difference]: Finished difference Result 139 states and 144 transitions. [2020-08-22 23:04:30,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 23:04:30,607 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 124 [2020-08-22 23:04:30,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:30,609 INFO L225 Difference]: With dead ends: 139 [2020-08-22 23:04:30,609 INFO L226 Difference]: Without dead ends: 137 [2020-08-22 23:04:30,610 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-22 23:04:30,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-22 23:04:30,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2020-08-22 23:04:30,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 23:04:30,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-08-22 23:04:30,626 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 124 [2020-08-22 23:04:30,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:30,627 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-08-22 23:04:30,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 23:04:30,628 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-08-22 23:04:30,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-22 23:04:30,638 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:30,638 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:30,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 23:04:30,638 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:30,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1723472539, now seen corresponding path program 10 times [2020-08-22 23:04:30,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:30,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298069385] [2020-08-22 23:04:30,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:30,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 23:04:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 23:04:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 23:04:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 23:04:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 23:04:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 23:04:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-08-22 23:04:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:30,951 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 154 proven. 102 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-22 23:04:30,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298069385] [2020-08-22 23:04:30,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:30,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 23:04:30,953 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336663708] [2020-08-22 23:04:30,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 23:04:30,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:30,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 23:04:30,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-08-22 23:04:30,956 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 18 states. [2020-08-22 23:04:31,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:31,638 INFO L93 Difference]: Finished difference Result 254 states and 280 transitions. [2020-08-22 23:04:31,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 23:04:31,639 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 134 [2020-08-22 23:04:31,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:31,644 INFO L225 Difference]: With dead ends: 254 [2020-08-22 23:04:31,645 INFO L226 Difference]: Without dead ends: 197 [2020-08-22 23:04:31,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=320, Invalid=672, Unknown=0, NotChecked=0, Total=992 [2020-08-22 23:04:31,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-08-22 23:04:31,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 138. [2020-08-22 23:04:31,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-22 23:04:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-08-22 23:04:31,678 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 134 [2020-08-22 23:04:31,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:31,679 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-08-22 23:04:31,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 23:04:31,679 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-08-22 23:04:31,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-08-22 23:04:31,682 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:31,682 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:31,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 23:04:31,683 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:31,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:31,683 INFO L82 PathProgramCache]: Analyzing trace with hash 318138221, now seen corresponding path program 11 times [2020-08-22 23:04:31,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:31,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351308000] [2020-08-22 23:04:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:32,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:32,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 23:04:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:32,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 23:04:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:32,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 23:04:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:32,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 23:04:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:32,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-22 23:04:32,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:32,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 23:04:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:32,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 23:04:32,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 154 proven. 140 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-22 23:04:32,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351308000] [2020-08-22 23:04:32,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:32,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 23:04:32,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177947789] [2020-08-22 23:04:32,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 23:04:32,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:32,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 23:04:32,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:04:32,115 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 19 states. [2020-08-22 23:04:32,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:32,870 INFO L93 Difference]: Finished difference Result 268 states and 297 transitions. [2020-08-22 23:04:32,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 23:04:32,870 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 140 [2020-08-22 23:04:32,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:32,873 INFO L225 Difference]: With dead ends: 268 [2020-08-22 23:04:32,874 INFO L226 Difference]: Without dead ends: 211 [2020-08-22 23:04:32,877 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 23:04:32,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-08-22 23:04:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 144. [2020-08-22 23:04:32,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-22 23:04:32,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-08-22 23:04:32,900 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 140 [2020-08-22 23:04:32,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:32,901 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-08-22 23:04:32,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 23:04:32,901 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-08-22 23:04:32,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-08-22 23:04:32,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:32,903 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:32,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 23:04:32,904 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:32,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:32,905 INFO L82 PathProgramCache]: Analyzing trace with hash 435110773, now seen corresponding path program 12 times [2020-08-22 23:04:32,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:32,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016073163] [2020-08-22 23:04:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:32,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:33,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 23:04:33,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 23:04:33,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 23:04:33,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 23:04:33,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 23:04:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 23:04:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 23:04:33,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 198 proven. 140 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-08-22 23:04:33,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016073163] [2020-08-22 23:04:33,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:33,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 23:04:33,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418101106] [2020-08-22 23:04:33,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 23:04:33,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:33,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 23:04:33,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 23:04:33,110 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 13 states. [2020-08-22 23:04:33,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:33,259 INFO L93 Difference]: Finished difference Result 167 states and 173 transitions. [2020-08-22 23:04:33,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 23:04:33,260 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 146 [2020-08-22 23:04:33,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:33,263 INFO L225 Difference]: With dead ends: 167 [2020-08-22 23:04:33,263 INFO L226 Difference]: Without dead ends: 165 [2020-08-22 23:04:33,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-08-22 23:04:33,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-08-22 23:04:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 160. [2020-08-22 23:04:33,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-22 23:04:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 166 transitions. [2020-08-22 23:04:33,287 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 166 transitions. Word has length 146 [2020-08-22 23:04:33,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:33,288 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 166 transitions. [2020-08-22 23:04:33,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 23:04:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 166 transitions. [2020-08-22 23:04:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-08-22 23:04:33,291 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:33,291 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:33,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 23:04:33,291 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:33,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:33,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1491064175, now seen corresponding path program 13 times [2020-08-22 23:04:33,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:33,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349358264] [2020-08-22 23:04:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:33,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 23:04:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 23:04:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 23:04:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 23:04:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 23:04:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 23:04:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 23:04:33,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-22 23:04:33,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-08-22 23:04:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 580 backedges. 252 proven. 184 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-08-22 23:04:33,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349358264] [2020-08-22 23:04:33,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:33,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 23:04:33,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702151375] [2020-08-22 23:04:33,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 23:04:33,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:33,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 23:04:33,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-08-22 23:04:33,684 INFO L87 Difference]: Start difference. First operand 160 states and 166 transitions. Second operand 22 states. [2020-08-22 23:04:34,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:34,376 INFO L93 Difference]: Finished difference Result 310 states and 343 transitions. [2020-08-22 23:04:34,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 23:04:34,376 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 166 [2020-08-22 23:04:34,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:34,379 INFO L225 Difference]: With dead ends: 310 [2020-08-22 23:04:34,380 INFO L226 Difference]: Without dead ends: 241 [2020-08-22 23:04:34,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=500, Invalid=1060, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 23:04:34,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-22 23:04:34,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 166. [2020-08-22 23:04:34,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-08-22 23:04:34,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 172 transitions. [2020-08-22 23:04:34,401 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 172 transitions. Word has length 166 [2020-08-22 23:04:34,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:34,402 INFO L479 AbstractCegarLoop]: Abstraction has 166 states and 172 transitions. [2020-08-22 23:04:34,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 23:04:34,402 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 172 transitions. [2020-08-22 23:04:34,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-08-22 23:04:34,404 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:34,405 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:34,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 23:04:34,405 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:34,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:34,405 INFO L82 PathProgramCache]: Analyzing trace with hash -586773351, now seen corresponding path program 14 times [2020-08-22 23:04:34,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:34,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945487880] [2020-08-22 23:04:34,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:34,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:34,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:34,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:34,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 23:04:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:34,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 23:04:34,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:34,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 23:04:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:34,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 23:04:34,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:34,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 23:04:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:34,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-22 23:04:34,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:34,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 23:04:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:34,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-08-22 23:04:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:34,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-22 23:04:34,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:34,826 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 252 proven. 234 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-08-22 23:04:34,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945487880] [2020-08-22 23:04:34,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:34,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 23:04:34,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850099432] [2020-08-22 23:04:34,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 23:04:34,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:34,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 23:04:34,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-08-22 23:04:34,830 INFO L87 Difference]: Start difference. First operand 166 states and 172 transitions. Second operand 23 states. [2020-08-22 23:04:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:35,642 INFO L93 Difference]: Finished difference Result 324 states and 360 transitions. [2020-08-22 23:04:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 23:04:35,643 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 172 [2020-08-22 23:04:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:35,646 INFO L225 Difference]: With dead ends: 324 [2020-08-22 23:04:35,646 INFO L226 Difference]: Without dead ends: 255 [2020-08-22 23:04:35,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=593, Invalid=1213, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 23:04:35,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-08-22 23:04:35,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 172. [2020-08-22 23:04:35,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-08-22 23:04:35,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 178 transitions. [2020-08-22 23:04:35,670 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 178 transitions. Word has length 172 [2020-08-22 23:04:35,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:35,670 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 178 transitions. [2020-08-22 23:04:35,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 23:04:35,671 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 178 transitions. [2020-08-22 23:04:35,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-08-22 23:04:35,674 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:35,674 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:35,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 23:04:35,674 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:35,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:35,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1481459873, now seen corresponding path program 15 times [2020-08-22 23:04:35,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:35,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579854277] [2020-08-22 23:04:35,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:35,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:35,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:35,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 23:04:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:35,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-22 23:04:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:35,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 23:04:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:35,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 23:04:35,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:35,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-22 23:04:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:35,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 23:04:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:35,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-22 23:04:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:35,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 23:04:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:35,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-22 23:04:35,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 686 backedges. 308 proven. 234 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-08-22 23:04:35,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579854277] [2020-08-22 23:04:35,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:35,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 23:04:35,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629660458] [2020-08-22 23:04:35,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 23:04:35,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:35,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 23:04:35,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:04:35,951 INFO L87 Difference]: Start difference. First operand 172 states and 178 transitions. Second operand 15 states. [2020-08-22 23:04:36,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:36,107 INFO L93 Difference]: Finished difference Result 195 states and 202 transitions. [2020-08-22 23:04:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 23:04:36,108 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 178 [2020-08-22 23:04:36,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:36,110 INFO L225 Difference]: With dead ends: 195 [2020-08-22 23:04:36,110 INFO L226 Difference]: Without dead ends: 193 [2020-08-22 23:04:36,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-22 23:04:36,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-08-22 23:04:36,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 188. [2020-08-22 23:04:36,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-08-22 23:04:36,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 195 transitions. [2020-08-22 23:04:36,129 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 195 transitions. Word has length 178 [2020-08-22 23:04:36,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:36,130 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 195 transitions. [2020-08-22 23:04:36,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 23:04:36,130 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 195 transitions. [2020-08-22 23:04:36,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2020-08-22 23:04:36,134 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:36,134 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:36,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 23:04:36,135 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:36,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:36,135 INFO L82 PathProgramCache]: Analyzing trace with hash 831775165, now seen corresponding path program 16 times [2020-08-22 23:04:36,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:36,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849999455] [2020-08-22 23:04:36,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:36,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:36,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:36,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:36,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 23:04:36,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:36,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-22 23:04:36,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:36,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 23:04:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:36,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 23:04:36,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:36,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-22 23:04:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:36,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 23:04:36,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:36,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-22 23:04:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:36,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 23:04:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:36,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-22 23:04:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:36,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-22 23:04:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:36,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-08-22 23:04:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 374 proven. 290 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-22 23:04:36,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849999455] [2020-08-22 23:04:36,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:36,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 23:04:36,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850067128] [2020-08-22 23:04:36,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 23:04:36,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:36,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 23:04:36,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2020-08-22 23:04:36,617 INFO L87 Difference]: Start difference. First operand 188 states and 195 transitions. Second operand 26 states. [2020-08-22 23:04:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:37,593 INFO L93 Difference]: Finished difference Result 366 states and 406 transitions. [2020-08-22 23:04:37,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 23:04:37,594 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 198 [2020-08-22 23:04:37,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:37,597 INFO L225 Difference]: With dead ends: 366 [2020-08-22 23:04:37,598 INFO L226 Difference]: Without dead ends: 285 [2020-08-22 23:04:37,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=720, Invalid=1536, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 23:04:37,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-08-22 23:04:37,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 194. [2020-08-22 23:04:37,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-08-22 23:04:37,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 201 transitions. [2020-08-22 23:04:37,625 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 201 transitions. Word has length 198 [2020-08-22 23:04:37,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:37,626 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 201 transitions. [2020-08-22 23:04:37,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 23:04:37,626 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 201 transitions. [2020-08-22 23:04:37,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-08-22 23:04:37,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:37,629 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:37,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 23:04:37,629 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:37,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:37,630 INFO L82 PathProgramCache]: Analyzing trace with hash -735042619, now seen corresponding path program 17 times [2020-08-22 23:04:37,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:37,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554004320] [2020-08-22 23:04:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:38,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:38,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:38,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 23:04:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:38,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 23:04:38,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:38,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 23:04:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:38,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-08-22 23:04:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:38,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-22 23:04:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:38,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2020-08-22 23:04:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:38,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-08-22 23:04:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:38,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-22 23:04:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:38,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2020-08-22 23:04:38,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:38,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2020-08-22 23:04:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:38,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2020-08-22 23:04:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:38,101 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 374 proven. 352 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-22 23:04:38,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554004320] [2020-08-22 23:04:38,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:38,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 23:04:38,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999757489] [2020-08-22 23:04:38,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 23:04:38,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:38,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 23:04:38,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2020-08-22 23:04:38,107 INFO L87 Difference]: Start difference. First operand 194 states and 201 transitions. Second operand 27 states. [2020-08-22 23:04:39,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:39,219 INFO L93 Difference]: Finished difference Result 380 states and 423 transitions. [2020-08-22 23:04:39,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 23:04:39,219 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 204 [2020-08-22 23:04:39,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:39,223 INFO L225 Difference]: With dead ends: 380 [2020-08-22 23:04:39,223 INFO L226 Difference]: Without dead ends: 299 [2020-08-22 23:04:39,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=831, Invalid=1719, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 23:04:39,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-08-22 23:04:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 200. [2020-08-22 23:04:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-22 23:04:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 207 transitions. [2020-08-22 23:04:39,253 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 207 transitions. Word has length 204 [2020-08-22 23:04:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:39,254 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 207 transitions. [2020-08-22 23:04:39,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 23:04:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 207 transitions. [2020-08-22 23:04:39,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-08-22 23:04:39,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:39,258 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:39,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 23:04:39,259 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:39,259 INFO L82 PathProgramCache]: Analyzing trace with hash 340049869, now seen corresponding path program 18 times [2020-08-22 23:04:39,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:39,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122871759] [2020-08-22 23:04:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 23:04:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-22 23:04:39,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 23:04:39,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 23:04:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-08-22 23:04:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-22 23:04:39,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-08-22 23:04:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-08-22 23:04:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-08-22 23:04:39,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-08-22 23:04:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-08-22 23:04:39,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1014 backedges. 442 proven. 352 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-08-22 23:04:39,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122871759] [2020-08-22 23:04:39,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:39,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 23:04:39,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567611857] [2020-08-22 23:04:39,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 23:04:39,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:39,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 23:04:39,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-22 23:04:39,601 INFO L87 Difference]: Start difference. First operand 200 states and 207 transitions. Second operand 17 states. [2020-08-22 23:04:39,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:39,780 INFO L93 Difference]: Finished difference Result 223 states and 231 transitions. [2020-08-22 23:04:39,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 23:04:39,781 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 210 [2020-08-22 23:04:39,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:39,783 INFO L225 Difference]: With dead ends: 223 [2020-08-22 23:04:39,783 INFO L226 Difference]: Without dead ends: 221 [2020-08-22 23:04:39,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2020-08-22 23:04:39,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-08-22 23:04:39,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 216. [2020-08-22 23:04:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-22 23:04:39,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 224 transitions. [2020-08-22 23:04:39,804 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 224 transitions. Word has length 210 [2020-08-22 23:04:39,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:39,805 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 224 transitions. [2020-08-22 23:04:39,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 23:04:39,805 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 224 transitions. [2020-08-22 23:04:39,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2020-08-22 23:04:39,808 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:39,808 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:39,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 23:04:39,809 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:39,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:39,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1871443223, now seen corresponding path program 19 times [2020-08-22 23:04:39,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:39,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111689115] [2020-08-22 23:04:39,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:39,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:40,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:40,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 23:04:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:40,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2020-08-22 23:04:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:40,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2020-08-22 23:04:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:40,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 23:04:40,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:40,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-08-22 23:04:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:40,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-22 23:04:40,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:40,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-08-22 23:04:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:40,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-08-22 23:04:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:40,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-08-22 23:04:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:40,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-08-22 23:04:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:40,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-08-22 23:04:40,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:40,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2020-08-22 23:04:40,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:40,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-22 23:04:40,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:40,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 518 proven. 420 refuted. 0 times theorem prover too weak. 314 trivial. 0 not checked. [2020-08-22 23:04:40,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111689115] [2020-08-22 23:04:40,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:40,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 23:04:40,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207229130] [2020-08-22 23:04:40,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 23:04:40,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:40,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 23:04:40,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2020-08-22 23:04:40,340 INFO L87 Difference]: Start difference. First operand 216 states and 224 transitions. Second operand 29 states. [2020-08-22 23:04:41,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:41,506 INFO L93 Difference]: Finished difference Result 422 states and 469 transitions. [2020-08-22 23:04:41,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 23:04:41,506 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 230 [2020-08-22 23:04:41,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:41,509 INFO L225 Difference]: With dead ends: 422 [2020-08-22 23:04:41,510 INFO L226 Difference]: Without dead ends: 329 [2020-08-22 23:04:41,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=965, Invalid=2005, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 23:04:41,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-08-22 23:04:41,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 222. [2020-08-22 23:04:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-08-22 23:04:41,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 230 transitions. [2020-08-22 23:04:41,537 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 230 transitions. Word has length 230 [2020-08-22 23:04:41,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:41,538 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 230 transitions. [2020-08-22 23:04:41,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 23:04:41,538 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 230 transitions. [2020-08-22 23:04:41,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-08-22 23:04:41,542 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:41,542 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:41,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 23:04:41,543 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:41,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:41,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1346776305, now seen corresponding path program 20 times [2020-08-22 23:04:41,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:41,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363109273] [2020-08-22 23:04:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:41,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:41,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 23:04:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:41,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 23:04:41,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:41,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 23:04:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:41,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 23:04:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:41,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-22 23:04:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:41,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-08-22 23:04:41,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:41,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-08-22 23:04:41,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:41,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-08-22 23:04:41,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:41,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-08-22 23:04:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:41,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-08-22 23:04:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:41,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-22 23:04:41,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:41,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-08-22 23:04:41,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:41,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-08-22 23:04:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:41,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 520 proven. 494 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2020-08-22 23:04:41,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363109273] [2020-08-22 23:04:41,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:41,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 23:04:41,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224682673] [2020-08-22 23:04:41,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 23:04:41,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:41,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 23:04:41,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-22 23:04:41,907 INFO L87 Difference]: Start difference. First operand 222 states and 230 transitions. Second operand 18 states. [2020-08-22 23:04:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:42,065 INFO L93 Difference]: Finished difference Result 239 states and 247 transitions. [2020-08-22 23:04:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 23:04:42,065 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 236 [2020-08-22 23:04:42,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:42,068 INFO L225 Difference]: With dead ends: 239 [2020-08-22 23:04:42,068 INFO L226 Difference]: Without dead ends: 237 [2020-08-22 23:04:42,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2020-08-22 23:04:42,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-08-22 23:04:42,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 232. [2020-08-22 23:04:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-22 23:04:42,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 240 transitions. [2020-08-22 23:04:42,094 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 240 transitions. Word has length 236 [2020-08-22 23:04:42,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:42,094 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 240 transitions. [2020-08-22 23:04:42,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 23:04:42,095 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 240 transitions. [2020-08-22 23:04:42,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-08-22 23:04:42,099 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:42,099 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:42,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 23:04:42,099 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:42,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:42,100 INFO L82 PathProgramCache]: Analyzing trace with hash -554583489, now seen corresponding path program 21 times [2020-08-22 23:04:42,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:42,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360251853] [2020-08-22 23:04:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:42,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:42,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:42,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 23:04:42,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:42,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2020-08-22 23:04:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:42,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2020-08-22 23:04:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:42,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 23:04:42,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:42,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-22 23:04:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:42,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-08-22 23:04:42,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:42,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-08-22 23:04:42,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:42,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-08-22 23:04:42,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:42,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-08-22 23:04:42,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:42,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-08-22 23:04:42,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:42,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-22 23:04:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:42,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-08-22 23:04:42,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:42,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-08-22 23:04:42,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:42,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-08-22 23:04:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 602 proven. 494 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-08-22 23:04:42,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360251853] [2020-08-22 23:04:42,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:42,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 23:04:42,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357787351] [2020-08-22 23:04:42,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 23:04:42,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:42,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 23:04:42,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2020-08-22 23:04:42,739 INFO L87 Difference]: Start difference. First operand 232 states and 240 transitions. Second operand 32 states. [2020-08-22 23:04:44,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:44,021 INFO L93 Difference]: Finished difference Result 452 states and 502 transitions. [2020-08-22 23:04:44,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-08-22 23:04:44,023 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 246 [2020-08-22 23:04:44,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:44,026 INFO L225 Difference]: With dead ends: 452 [2020-08-22 23:04:44,027 INFO L226 Difference]: Without dead ends: 353 [2020-08-22 23:04:44,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1125, Invalid=2415, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 23:04:44,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2020-08-22 23:04:44,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 238. [2020-08-22 23:04:44,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 238 states. [2020-08-22 23:04:44,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 246 transitions. [2020-08-22 23:04:44,061 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 246 transitions. Word has length 246 [2020-08-22 23:04:44,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:44,061 INFO L479 AbstractCegarLoop]: Abstraction has 238 states and 246 transitions. [2020-08-22 23:04:44,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 23:04:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 246 transitions. [2020-08-22 23:04:44,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-08-22 23:04:44,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:44,065 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:44,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 23:04:44,065 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:44,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:44,066 INFO L82 PathProgramCache]: Analyzing trace with hash -812725177, now seen corresponding path program 22 times [2020-08-22 23:04:44,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:44,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605533195] [2020-08-22 23:04:44,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 23:04:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 23:04:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2020-08-22 23:04:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 23:04:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-08-22 23:04:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-22 23:04:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-08-22 23:04:44,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-08-22 23:04:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-22 23:04:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-08-22 23:04:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-08-22 23:04:44,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-08-22 23:04:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-08-22 23:04:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2020-08-22 23:04:44,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 602 proven. 574 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-08-22 23:04:44,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605533195] [2020-08-22 23:04:44,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:44,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 23:04:44,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316512453] [2020-08-22 23:04:44,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 23:04:44,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:44,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 23:04:44,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 23:04:44,760 INFO L87 Difference]: Start difference. First operand 238 states and 246 transitions. Second operand 33 states. [2020-08-22 23:04:46,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:46,270 INFO L93 Difference]: Finished difference Result 466 states and 519 transitions. [2020-08-22 23:04:46,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 23:04:46,271 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 252 [2020-08-22 23:04:46,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:46,274 INFO L225 Difference]: With dead ends: 466 [2020-08-22 23:04:46,274 INFO L226 Difference]: Without dead ends: 367 [2020-08-22 23:04:46,277 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1263, Invalid=2643, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 23:04:46,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-08-22 23:04:46,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 244. [2020-08-22 23:04:46,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 244 states. [2020-08-22 23:04:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 252 transitions. [2020-08-22 23:04:46,305 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 252 transitions. Word has length 252 [2020-08-22 23:04:46,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:46,306 INFO L479 AbstractCegarLoop]: Abstraction has 244 states and 252 transitions. [2020-08-22 23:04:46,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 23:04:46,306 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 252 transitions. [2020-08-22 23:04:46,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-08-22 23:04:46,309 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:46,310 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:46,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 23:04:46,310 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:46,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:46,311 INFO L82 PathProgramCache]: Analyzing trace with hash -305645489, now seen corresponding path program 23 times [2020-08-22 23:04:46,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:46,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652132264] [2020-08-22 23:04:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:46,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:46,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 23:04:46,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:46,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-22 23:04:46,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:46,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 23:04:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:46,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-22 23:04:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:46,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 23:04:46,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:46,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-22 23:04:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:46,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-22 23:04:46,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:46,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-08-22 23:04:46,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:46,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-08-22 23:04:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:46,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-22 23:04:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:46,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-08-22 23:04:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:46,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-08-22 23:04:46,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:46,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-08-22 23:04:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:46,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-22 23:04:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 1626 backedges. 688 proven. 574 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2020-08-22 23:04:46,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652132264] [2020-08-22 23:04:46,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:46,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 23:04:46,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811017381] [2020-08-22 23:04:46,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 23:04:46,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:46,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 23:04:46,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-22 23:04:46,708 INFO L87 Difference]: Start difference. First operand 244 states and 252 transitions. Second operand 20 states. [2020-08-22 23:04:46,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:46,920 INFO L93 Difference]: Finished difference Result 267 states and 276 transitions. [2020-08-22 23:04:46,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 23:04:46,920 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 258 [2020-08-22 23:04:46,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:46,923 INFO L225 Difference]: With dead ends: 267 [2020-08-22 23:04:46,923 INFO L226 Difference]: Without dead ends: 265 [2020-08-22 23:04:46,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2020-08-22 23:04:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-22 23:04:46,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 260. [2020-08-22 23:04:46,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-22 23:04:46,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 269 transitions. [2020-08-22 23:04:46,949 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 269 transitions. Word has length 258 [2020-08-22 23:04:46,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:46,950 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 269 transitions. [2020-08-22 23:04:46,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 23:04:46,950 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 269 transitions. [2020-08-22 23:04:46,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-08-22 23:04:46,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:46,952 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:46,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 23:04:46,953 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:46,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:46,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1556599189, now seen corresponding path program 24 times [2020-08-22 23:04:46,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:46,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39745216] [2020-08-22 23:04:46,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 23:04:47,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2020-08-22 23:04:47,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2020-08-22 23:04:47,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-22 23:04:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 23:04:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-22 23:04:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-22 23:04:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-08-22 23:04:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-08-22 23:04:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-22 23:04:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-08-22 23:04:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-08-22 23:04:47,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-08-22 23:04:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-22 23:04:47,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-08-22 23:04:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-08-22 23:04:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:47,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1924 backedges. 784 proven. 660 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-08-22 23:04:47,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39745216] [2020-08-22 23:04:47,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:47,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 23:04:47,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438127285] [2020-08-22 23:04:47,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 23:04:47,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:47,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 23:04:47,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 23:04:47,734 INFO L87 Difference]: Start difference. First operand 260 states and 269 transitions. Second operand 36 states. [2020-08-22 23:04:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:49,390 INFO L93 Difference]: Finished difference Result 508 states and 565 transitions. [2020-08-22 23:04:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-08-22 23:04:49,391 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 278 [2020-08-22 23:04:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:49,393 INFO L225 Difference]: With dead ends: 508 [2020-08-22 23:04:49,393 INFO L226 Difference]: Without dead ends: 397 [2020-08-22 23:04:49,395 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1445, Invalid=3111, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 23:04:49,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2020-08-22 23:04:49,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 266. [2020-08-22 23:04:49,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-08-22 23:04:49,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 275 transitions. [2020-08-22 23:04:49,422 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 275 transitions. Word has length 278 [2020-08-22 23:04:49,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:49,423 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 275 transitions. [2020-08-22 23:04:49,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 23:04:49,423 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 275 transitions. [2020-08-22 23:04:49,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-08-22 23:04:49,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:49,425 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:49,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 23:04:49,425 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:49,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:49,426 INFO L82 PathProgramCache]: Analyzing trace with hash -104128397, now seen corresponding path program 25 times [2020-08-22 23:04:49,426 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:49,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006728657] [2020-08-22 23:04:49,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2020-08-22 23:04:50,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2020-08-22 23:04:50,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2020-08-22 23:04:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-08-22 23:04:50,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-22 23:04:50,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2020-08-22 23:04:50,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2020-08-22 23:04:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2020-08-22 23:04:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2020-08-22 23:04:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2020-08-22 23:04:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-08-22 23:04:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-22 23:04:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2020-08-22 23:04:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2020-08-22 23:04:50,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-08-22 23:04:50,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-08-22 23:04:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:50,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 784 proven. 752 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-08-22 23:04:50,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006728657] [2020-08-22 23:04:50,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:50,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-22 23:04:50,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692422541] [2020-08-22 23:04:50,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 23:04:50,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:50,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 23:04:50,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 23:04:50,232 INFO L87 Difference]: Start difference. First operand 266 states and 275 transitions. Second operand 37 states. [2020-08-22 23:04:52,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:52,005 INFO L93 Difference]: Finished difference Result 522 states and 582 transitions. [2020-08-22 23:04:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-22 23:04:52,006 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 284 [2020-08-22 23:04:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:52,009 INFO L225 Difference]: With dead ends: 522 [2020-08-22 23:04:52,009 INFO L226 Difference]: Without dead ends: 411 [2020-08-22 23:04:52,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1601, Invalid=3369, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 23:04:52,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2020-08-22 23:04:52,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 272. [2020-08-22 23:04:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-08-22 23:04:52,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 281 transitions. [2020-08-22 23:04:52,052 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 281 transitions. Word has length 284 [2020-08-22 23:04:52,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:52,052 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 281 transitions. [2020-08-22 23:04:52,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 23:04:52,052 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 281 transitions. [2020-08-22 23:04:52,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-08-22 23:04:52,057 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:52,058 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:52,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 23:04:52,058 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:52,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:52,058 INFO L82 PathProgramCache]: Analyzing trace with hash -435000197, now seen corresponding path program 26 times [2020-08-22 23:04:52,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:52,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455009975] [2020-08-22 23:04:52,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 23:04:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-08-22 23:04:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-22 23:04:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-08-22 23:04:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-08-22 23:04:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-08-22 23:04:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-08-22 23:04:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-08-22 23:04:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2020-08-22 23:04:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-22 23:04:52,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2020-08-22 23:04:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2020-08-22 23:04:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-08-22 23:04:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-08-22 23:04:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-08-22 23:04:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-08-22 23:04:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:52,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2114 backedges. 882 proven. 752 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2020-08-22 23:04:52,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455009975] [2020-08-22 23:04:52,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:52,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 23:04:52,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058217108] [2020-08-22 23:04:52,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 23:04:52,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:52,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 23:04:52,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-22 23:04:52,491 INFO L87 Difference]: Start difference. First operand 272 states and 281 transitions. Second operand 22 states. [2020-08-22 23:04:52,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:52,742 INFO L93 Difference]: Finished difference Result 295 states and 305 transitions. [2020-08-22 23:04:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 23:04:52,743 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 290 [2020-08-22 23:04:52,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:52,746 INFO L225 Difference]: With dead ends: 295 [2020-08-22 23:04:52,746 INFO L226 Difference]: Without dead ends: 293 [2020-08-22 23:04:52,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-08-22 23:04:52,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-08-22 23:04:52,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 288. [2020-08-22 23:04:52,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-08-22 23:04:52,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 298 transitions. [2020-08-22 23:04:52,778 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 298 transitions. Word has length 290 [2020-08-22 23:04:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:52,779 INFO L479 AbstractCegarLoop]: Abstraction has 288 states and 298 transitions. [2020-08-22 23:04:52,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 23:04:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 298 transitions. [2020-08-22 23:04:52,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2020-08-22 23:04:52,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:52,781 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:52,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 23:04:52,781 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:52,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:52,782 INFO L82 PathProgramCache]: Analyzing trace with hash -827681641, now seen corresponding path program 27 times [2020-08-22 23:04:52,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:52,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611213251] [2020-08-22 23:04:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2020-08-22 23:04:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2020-08-22 23:04:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2020-08-22 23:04:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-08-22 23:04:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-08-22 23:04:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-08-22 23:04:53,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-08-22 23:04:53,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-08-22 23:04:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2020-08-22 23:04:53,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-22 23:04:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2020-08-22 23:04:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2020-08-22 23:04:53,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-08-22 23:04:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-08-22 23:04:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-08-22 23:04:53,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-08-22 23:04:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-22 23:04:53,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2020-08-22 23:04:53,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2452 backedges. 990 proven. 850 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-08-22 23:04:53,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611213251] [2020-08-22 23:04:53,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:53,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 23:04:53,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26852] [2020-08-22 23:04:53,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 23:04:53,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:53,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 23:04:53,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 23:04:53,729 INFO L87 Difference]: Start difference. First operand 288 states and 298 transitions. Second operand 40 states. [2020-08-22 23:04:55,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:55,757 INFO L93 Difference]: Finished difference Result 564 states and 628 transitions. [2020-08-22 23:04:55,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-08-22 23:04:55,757 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 310 [2020-08-22 23:04:55,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:55,761 INFO L225 Difference]: With dead ends: 564 [2020-08-22 23:04:55,761 INFO L226 Difference]: Without dead ends: 441 [2020-08-22 23:04:55,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1805, Invalid=3895, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 23:04:55,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-08-22 23:04:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 294. [2020-08-22 23:04:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-08-22 23:04:55,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 304 transitions. [2020-08-22 23:04:55,796 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 304 transitions. Word has length 310 [2020-08-22 23:04:55,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:55,797 INFO L479 AbstractCegarLoop]: Abstraction has 294 states and 304 transitions. [2020-08-22 23:04:55,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 23:04:55,797 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 304 transitions. [2020-08-22 23:04:55,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-08-22 23:04:55,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:55,799 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:55,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 23:04:55,800 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:55,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:55,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1001612959, now seen corresponding path program 28 times [2020-08-22 23:04:55,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:55,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390096857] [2020-08-22 23:04:55,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2020-08-22 23:04:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2020-08-22 23:04:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2020-08-22 23:04:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-08-22 23:04:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-08-22 23:04:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-08-22 23:04:56,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-08-22 23:04:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-22 23:04:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-08-22 23:04:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-08-22 23:04:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-08-22 23:04:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2020-08-22 23:04:56,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2020-08-22 23:04:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2020-08-22 23:04:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-22 23:04:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-08-22 23:04:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-08-22 23:04:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-08-22 23:04:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 990 proven. 954 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-08-22 23:04:56,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390096857] [2020-08-22 23:04:56,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:56,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-22 23:04:56,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206125043] [2020-08-22 23:04:56,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 23:04:56,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:56,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 23:04:56,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 23:04:56,856 INFO L87 Difference]: Start difference. First operand 294 states and 304 transitions. Second operand 41 states. [2020-08-22 23:04:59,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:59,077 INFO L93 Difference]: Finished difference Result 578 states and 645 transitions. [2020-08-22 23:04:59,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-08-22 23:04:59,077 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 316 [2020-08-22 23:04:59,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:59,081 INFO L225 Difference]: With dead ends: 578 [2020-08-22 23:04:59,081 INFO L226 Difference]: Without dead ends: 455 [2020-08-22 23:04:59,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1979, Invalid=4183, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 23:04:59,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2020-08-22 23:04:59,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 300. [2020-08-22 23:04:59,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-08-22 23:04:59,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 310 transitions. [2020-08-22 23:04:59,121 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 310 transitions. Word has length 316 [2020-08-22 23:04:59,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:59,121 INFO L479 AbstractCegarLoop]: Abstraction has 300 states and 310 transitions. [2020-08-22 23:04:59,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 23:04:59,122 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 310 transitions. [2020-08-22 23:04:59,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-08-22 23:04:59,124 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:59,124 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:59,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 23:04:59,125 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:59,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:59,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1183355559, now seen corresponding path program 29 times [2020-08-22 23:04:59,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:59,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379280978] [2020-08-22 23:04:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:04:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:04:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 23:04:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-08-22 23:04:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-22 23:04:59,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-08-22 23:04:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-08-22 23:04:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-22 23:04:59,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-08-22 23:04:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-08-22 23:04:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-08-22 23:04:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-08-22 23:04:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2020-08-22 23:04:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2020-08-22 23:04:59,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-22 23:04:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-08-22 23:04:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-08-22 23:04:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-08-22 23:04:59,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-08-22 23:04:59,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-08-22 23:04:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:04:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2666 backedges. 1100 proven. 954 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2020-08-22 23:04:59,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379280978] [2020-08-22 23:04:59,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:04:59,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 23:04:59,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207385022] [2020-08-22 23:04:59,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 23:04:59,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:04:59,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 23:04:59,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-22 23:04:59,680 INFO L87 Difference]: Start difference. First operand 300 states and 310 transitions. Second operand 24 states. [2020-08-22 23:04:59,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:04:59,935 INFO L93 Difference]: Finished difference Result 323 states and 334 transitions. [2020-08-22 23:04:59,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 23:04:59,936 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 322 [2020-08-22 23:04:59,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:04:59,939 INFO L225 Difference]: With dead ends: 323 [2020-08-22 23:04:59,940 INFO L226 Difference]: Without dead ends: 321 [2020-08-22 23:04:59,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2020-08-22 23:04:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-08-22 23:04:59,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 316. [2020-08-22 23:04:59,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-08-22 23:04:59,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 327 transitions. [2020-08-22 23:04:59,970 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 327 transitions. Word has length 322 [2020-08-22 23:04:59,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:04:59,971 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 327 transitions. [2020-08-22 23:04:59,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 23:04:59,971 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 327 transitions. [2020-08-22 23:04:59,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2020-08-22 23:04:59,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:04:59,975 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:04:59,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 23:04:59,975 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:04:59,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:04:59,975 INFO L82 PathProgramCache]: Analyzing trace with hash 920382659, now seen corresponding path program 30 times [2020-08-22 23:04:59,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:04:59,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596606942] [2020-08-22 23:04:59,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:00,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2020-08-22 23:05:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2020-08-22 23:05:01,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2020-08-22 23:05:01,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-08-22 23:05:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-08-22 23:05:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-22 23:05:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-08-22 23:05:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-08-22 23:05:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-08-22 23:05:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-08-22 23:05:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2020-08-22 23:05:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2020-08-22 23:05:01,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-22 23:05:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-08-22 23:05:01,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-08-22 23:05:01,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-08-22 23:05:01,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-08-22 23:05:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-08-22 23:05:01,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-08-22 23:05:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-22 23:05:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3044 backedges. 1220 proven. 1064 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-08-22 23:05:01,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596606942] [2020-08-22 23:05:01,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:01,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 23:05:01,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19869628] [2020-08-22 23:05:01,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 23:05:01,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:01,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 23:05:01,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 23:05:01,182 INFO L87 Difference]: Start difference. First operand 316 states and 327 transitions. Second operand 44 states. [2020-08-22 23:05:03,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:03,639 INFO L93 Difference]: Finished difference Result 620 states and 691 transitions. [2020-08-22 23:05:03,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-08-22 23:05:03,644 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 342 [2020-08-22 23:05:03,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:03,647 INFO L225 Difference]: With dead ends: 620 [2020-08-22 23:05:03,648 INFO L226 Difference]: Without dead ends: 485 [2020-08-22 23:05:03,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2205, Invalid=4767, Unknown=0, NotChecked=0, Total=6972 [2020-08-22 23:05:03,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-08-22 23:05:03,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 322. [2020-08-22 23:05:03,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-08-22 23:05:03,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 333 transitions. [2020-08-22 23:05:03,686 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 333 transitions. Word has length 342 [2020-08-22 23:05:03,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:03,686 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 333 transitions. [2020-08-22 23:05:03,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 23:05:03,687 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 333 transitions. [2020-08-22 23:05:03,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-08-22 23:05:03,689 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:03,689 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:03,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 23:05:03,690 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:03,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:03,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1792712395, now seen corresponding path program 31 times [2020-08-22 23:05:03,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:03,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190408572] [2020-08-22 23:05:03,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2020-08-22 23:05:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2020-08-22 23:05:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2020-08-22 23:05:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-22 23:05:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-08-22 23:05:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-08-22 23:05:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-22 23:05:04,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-08-22 23:05:04,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-08-22 23:05:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-08-22 23:05:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-22 23:05:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-08-22 23:05:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-08-22 23:05:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-08-22 23:05:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2020-08-22 23:05:04,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-08-22 23:05:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-08-22 23:05:04,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-22 23:05:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-08-22 23:05:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-08-22 23:05:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 1220 proven. 1180 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-08-22 23:05:04,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190408572] [2020-08-22 23:05:04,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:04,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-08-22 23:05:04,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994108754] [2020-08-22 23:05:04,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-22 23:05:04,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:04,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-22 23:05:04,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 23:05:04,912 INFO L87 Difference]: Start difference. First operand 322 states and 333 transitions. Second operand 45 states. [2020-08-22 23:05:07,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:07,542 INFO L93 Difference]: Finished difference Result 634 states and 708 transitions. [2020-08-22 23:05:07,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-08-22 23:05:07,542 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 348 [2020-08-22 23:05:07,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:07,545 INFO L225 Difference]: With dead ends: 634 [2020-08-22 23:05:07,545 INFO L226 Difference]: Without dead ends: 499 [2020-08-22 23:05:07,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2397, Invalid=5085, Unknown=0, NotChecked=0, Total=7482 [2020-08-22 23:05:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2020-08-22 23:05:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 328. [2020-08-22 23:05:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-22 23:05:07,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 339 transitions. [2020-08-22 23:05:07,586 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 339 transitions. Word has length 348 [2020-08-22 23:05:07,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:07,586 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 339 transitions. [2020-08-22 23:05:07,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-22 23:05:07,587 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 339 transitions. [2020-08-22 23:05:07,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-08-22 23:05:07,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:07,590 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:07,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 23:05:07,590 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:07,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:07,590 INFO L82 PathProgramCache]: Analyzing trace with hash -457332013, now seen corresponding path program 32 times [2020-08-22 23:05:07,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:07,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597644760] [2020-08-22 23:05:07,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-08-22 23:05:08,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-22 23:05:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2020-08-22 23:05:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2020-08-22 23:05:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2020-08-22 23:05:08,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2020-08-22 23:05:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2020-08-22 23:05:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-08-22 23:05:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-22 23:05:08,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2020-08-22 23:05:08,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2020-08-22 23:05:08,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-08-22 23:05:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-08-22 23:05:08,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2020-08-22 23:05:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-08-22 23:05:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-22 23:05:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-22 23:05:08,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-08-22 23:05:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-08-22 23:05:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-08-22 23:05:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3282 backedges. 1342 proven. 1180 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2020-08-22 23:05:08,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597644760] [2020-08-22 23:05:08,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:08,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 23:05:08,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735974448] [2020-08-22 23:05:08,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 23:05:08,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:08,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 23:05:08,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-22 23:05:08,347 INFO L87 Difference]: Start difference. First operand 328 states and 339 transitions. Second operand 26 states. [2020-08-22 23:05:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:08,688 INFO L93 Difference]: Finished difference Result 351 states and 363 transitions. [2020-08-22 23:05:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 23:05:08,688 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 354 [2020-08-22 23:05:08,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:08,691 INFO L225 Difference]: With dead ends: 351 [2020-08-22 23:05:08,692 INFO L226 Difference]: Without dead ends: 349 [2020-08-22 23:05:08,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2020-08-22 23:05:08,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-08-22 23:05:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 344. [2020-08-22 23:05:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 344 states. [2020-08-22 23:05:08,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 356 transitions. [2020-08-22 23:05:08,732 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 356 transitions. Word has length 354 [2020-08-22 23:05:08,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:08,733 INFO L479 AbstractCegarLoop]: Abstraction has 344 states and 356 transitions. [2020-08-22 23:05:08,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 23:05:08,733 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 356 transitions. [2020-08-22 23:05:08,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2020-08-22 23:05:08,736 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:08,736 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:08,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 23:05:08,737 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:08,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:08,737 INFO L82 PathProgramCache]: Analyzing trace with hash 702494447, now seen corresponding path program 33 times [2020-08-22 23:05:08,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:08,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587004554] [2020-08-22 23:05:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2020-08-22 23:05:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2020-08-22 23:05:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2020-08-22 23:05:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2020-08-22 23:05:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2020-08-22 23:05:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2020-08-22 23:05:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2020-08-22 23:05:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-08-22 23:05:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-22 23:05:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2020-08-22 23:05:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2020-08-22 23:05:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-08-22 23:05:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-08-22 23:05:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2020-08-22 23:05:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-08-22 23:05:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-22 23:05:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-22 23:05:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-08-22 23:05:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-08-22 23:05:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-08-22 23:05:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-08-22 23:05:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:09,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-22 23:05:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:10,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3700 backedges. 1474 proven. 1302 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-08-22 23:05:10,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587004554] [2020-08-22 23:05:10,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:10,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-22 23:05:10,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115674498] [2020-08-22 23:05:10,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 23:05:10,101 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:10,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 23:05:10,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 23:05:10,101 INFO L87 Difference]: Start difference. First operand 344 states and 356 transitions. Second operand 48 states. [2020-08-22 23:05:13,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:13,127 INFO L93 Difference]: Finished difference Result 676 states and 754 transitions. [2020-08-22 23:05:13,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-08-22 23:05:13,128 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 374 [2020-08-22 23:05:13,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:13,130 INFO L225 Difference]: With dead ends: 676 [2020-08-22 23:05:13,131 INFO L226 Difference]: Without dead ends: 529 [2020-08-22 23:05:13,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2645, Invalid=5727, Unknown=0, NotChecked=0, Total=8372 [2020-08-22 23:05:13,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2020-08-22 23:05:13,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 350. [2020-08-22 23:05:13,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-08-22 23:05:13,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 362 transitions. [2020-08-22 23:05:13,177 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 362 transitions. Word has length 374 [2020-08-22 23:05:13,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:13,177 INFO L479 AbstractCegarLoop]: Abstraction has 350 states and 362 transitions. [2020-08-22 23:05:13,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 23:05:13,177 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 362 transitions. [2020-08-22 23:05:13,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2020-08-22 23:05:13,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:13,180 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:13,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 23:05:13,181 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:13,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:13,183 INFO L82 PathProgramCache]: Analyzing trace with hash -715929353, now seen corresponding path program 34 times [2020-08-22 23:05:13,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:13,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380145234] [2020-08-22 23:05:13,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:14,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2020-08-22 23:05:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2020-08-22 23:05:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2020-08-22 23:05:14,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-08-22 23:05:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-08-22 23:05:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2020-08-22 23:05:14,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-22 23:05:14,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2020-08-22 23:05:14,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2020-08-22 23:05:14,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-08-22 23:05:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-08-22 23:05:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-08-22 23:05:14,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-08-22 23:05:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-22 23:05:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2020-08-22 23:05:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-08-22 23:05:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-08-22 23:05:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-08-22 23:05:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-08-22 23:05:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-08-22 23:05:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-08-22 23:05:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-08-22 23:05:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 1474 proven. 1430 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-08-22 23:05:14,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380145234] [2020-08-22 23:05:14,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:14,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-08-22 23:05:14,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137360568] [2020-08-22 23:05:14,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-22 23:05:14,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:14,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-22 23:05:14,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=1751, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 23:05:14,665 INFO L87 Difference]: Start difference. First operand 350 states and 362 transitions. Second operand 49 states. [2020-08-22 23:05:18,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:18,058 INFO L93 Difference]: Finished difference Result 690 states and 771 transitions. [2020-08-22 23:05:18,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-08-22 23:05:18,058 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 380 [2020-08-22 23:05:18,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:18,061 INFO L225 Difference]: With dead ends: 690 [2020-08-22 23:05:18,061 INFO L226 Difference]: Without dead ends: 543 [2020-08-22 23:05:18,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2855, Invalid=6075, Unknown=0, NotChecked=0, Total=8930 [2020-08-22 23:05:18,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2020-08-22 23:05:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 356. [2020-08-22 23:05:18,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 356 states. [2020-08-22 23:05:18,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 368 transitions. [2020-08-22 23:05:18,107 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 368 transitions. Word has length 380 [2020-08-22 23:05:18,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:18,107 INFO L479 AbstractCegarLoop]: Abstraction has 356 states and 368 transitions. [2020-08-22 23:05:18,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-22 23:05:18,107 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 368 transitions. [2020-08-22 23:05:18,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-08-22 23:05:18,110 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:18,110 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:18,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 23:05:18,111 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:18,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:18,111 INFO L82 PathProgramCache]: Analyzing trace with hash 247772415, now seen corresponding path program 35 times [2020-08-22 23:05:18,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:18,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105234088] [2020-08-22 23:05:18,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:18,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-08-22 23:05:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-08-22 23:05:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-08-22 23:05:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-08-22 23:05:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-22 23:05:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-08-22 23:05:18,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-08-22 23:05:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-08-22 23:05:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2020-08-22 23:05:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2020-08-22 23:05:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2020-08-22 23:05:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-22 23:05:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-08-22 23:05:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-08-22 23:05:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-08-22 23:05:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-08-22 23:05:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-08-22 23:05:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-08-22 23:05:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-08-22 23:05:18,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-08-22 23:05:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-08-22 23:05:18,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-08-22 23:05:18,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:18,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3962 backedges. 1608 proven. 1430 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2020-08-22 23:05:18,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105234088] [2020-08-22 23:05:18,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:18,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 23:05:18,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682427606] [2020-08-22 23:05:18,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 23:05:18,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:18,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 23:05:18,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-22 23:05:18,872 INFO L87 Difference]: Start difference. First operand 356 states and 368 transitions. Second operand 28 states. [2020-08-22 23:05:19,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:19,208 INFO L93 Difference]: Finished difference Result 379 states and 392 transitions. [2020-08-22 23:05:19,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 23:05:19,209 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 386 [2020-08-22 23:05:19,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:19,212 INFO L225 Difference]: With dead ends: 379 [2020-08-22 23:05:19,212 INFO L226 Difference]: Without dead ends: 377 [2020-08-22 23:05:19,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2020-08-22 23:05:19,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-08-22 23:05:19,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 372. [2020-08-22 23:05:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-08-22 23:05:19,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 385 transitions. [2020-08-22 23:05:19,259 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 385 transitions. Word has length 386 [2020-08-22 23:05:19,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:19,260 INFO L479 AbstractCegarLoop]: Abstraction has 372 states and 385 transitions. [2020-08-22 23:05:19,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 23:05:19,260 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 385 transitions. [2020-08-22 23:05:19,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2020-08-22 23:05:19,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:19,263 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:19,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 23:05:19,263 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:19,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:19,264 INFO L82 PathProgramCache]: Analyzing trace with hash 776434459, now seen corresponding path program 36 times [2020-08-22 23:05:19,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:19,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813674907] [2020-08-22 23:05:19,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:20,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2020-08-22 23:05:20,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2020-08-22 23:05:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2020-08-22 23:05:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-08-22 23:05:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-22 23:05:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-08-22 23:05:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-08-22 23:05:20,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-08-22 23:05:20,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2020-08-22 23:05:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2020-08-22 23:05:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2020-08-22 23:05:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-22 23:05:20,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-08-22 23:05:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-08-22 23:05:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-08-22 23:05:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-08-22 23:05:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-08-22 23:05:20,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-08-22 23:05:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-08-22 23:05:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-08-22 23:05:20,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-08-22 23:05:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-08-22 23:05:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 23:05:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2020-08-22 23:05:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:20,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4420 backedges. 1752 proven. 1564 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-08-22 23:05:20,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813674907] [2020-08-22 23:05:20,960 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:20,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-08-22 23:05:20,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478357700] [2020-08-22 23:05:20,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-22 23:05:20,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:20,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-22 23:05:20,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 23:05:20,963 INFO L87 Difference]: Start difference. First operand 372 states and 385 transitions. Second operand 52 states. [2020-08-22 23:05:24,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:24,618 INFO L93 Difference]: Finished difference Result 732 states and 817 transitions. [2020-08-22 23:05:24,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-08-22 23:05:24,619 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 406 [2020-08-22 23:05:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:24,623 INFO L225 Difference]: With dead ends: 732 [2020-08-22 23:05:24,623 INFO L226 Difference]: Without dead ends: 573 [2020-08-22 23:05:24,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3125, Invalid=6775, Unknown=0, NotChecked=0, Total=9900 [2020-08-22 23:05:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2020-08-22 23:05:24,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 378. [2020-08-22 23:05:24,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-08-22 23:05:24,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 391 transitions. [2020-08-22 23:05:24,685 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 391 transitions. Word has length 406 [2020-08-22 23:05:24,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:24,685 INFO L479 AbstractCegarLoop]: Abstraction has 378 states and 391 transitions. [2020-08-22 23:05:24,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-22 23:05:24,685 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 391 transitions. [2020-08-22 23:05:24,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2020-08-22 23:05:24,691 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:24,691 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:24,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 23:05:24,692 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:24,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:24,693 INFO L82 PathProgramCache]: Analyzing trace with hash 28435747, now seen corresponding path program 37 times [2020-08-22 23:05:24,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:24,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624468570] [2020-08-22 23:05:24,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:24,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2020-08-22 23:05:26,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2020-08-22 23:05:26,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2020-08-22 23:05:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-08-22 23:05:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-08-22 23:05:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-08-22 23:05:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-08-22 23:05:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2020-08-22 23:05:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2020-08-22 23:05:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-22 23:05:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-08-22 23:05:26,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-08-22 23:05:26,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-08-22 23:05:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-08-22 23:05:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-08-22 23:05:26,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-08-22 23:05:26,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-22 23:05:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-08-22 23:05:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-08-22 23:05:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-08-22 23:05:26,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-08-22 23:05:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-08-22 23:05:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-08-22 23:05:26,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-08-22 23:05:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 1752 proven. 1704 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-08-22 23:05:26,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624468570] [2020-08-22 23:05:26,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:26,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-08-22 23:05:26,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669771517] [2020-08-22 23:05:26,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-22 23:05:26,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:26,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-22 23:05:26,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=2053, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 23:05:26,390 INFO L87 Difference]: Start difference. First operand 378 states and 391 transitions. Second operand 53 states. [2020-08-22 23:05:30,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:30,532 INFO L93 Difference]: Finished difference Result 746 states and 834 transitions. [2020-08-22 23:05:30,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-08-22 23:05:30,532 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 412 [2020-08-22 23:05:30,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:30,537 INFO L225 Difference]: With dead ends: 746 [2020-08-22 23:05:30,537 INFO L226 Difference]: Without dead ends: 587 [2020-08-22 23:05:30,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3353, Invalid=7153, Unknown=0, NotChecked=0, Total=10506 [2020-08-22 23:05:30,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-22 23:05:30,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 384. [2020-08-22 23:05:30,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 384 states. [2020-08-22 23:05:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 397 transitions. [2020-08-22 23:05:30,608 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 397 transitions. Word has length 412 [2020-08-22 23:05:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:30,609 INFO L479 AbstractCegarLoop]: Abstraction has 384 states and 397 transitions. [2020-08-22 23:05:30,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-22 23:05:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 397 transitions. [2020-08-22 23:05:30,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-08-22 23:05:30,613 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:30,614 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:30,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 23:05:30,614 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:30,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:30,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1261482283, now seen corresponding path program 38 times [2020-08-22 23:05:30,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:30,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281790463] [2020-08-22 23:05:30,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-22 23:05:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-08-22 23:05:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-08-22 23:05:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-22 23:05:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-08-22 23:05:31,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-08-22 23:05:31,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-08-22 23:05:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-22 23:05:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-08-22 23:05:31,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-08-22 23:05:31,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-08-22 23:05:31,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2020-08-22 23:05:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-08-22 23:05:31,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-08-22 23:05:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-22 23:05:31,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-08-22 23:05:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-08-22 23:05:31,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 23:05:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-08-22 23:05:31,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-08-22 23:05:31,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-08-22 23:05:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-08-22 23:05:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-08-22 23:05:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-08-22 23:05:31,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:31,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4706 backedges. 1898 proven. 1704 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2020-08-22 23:05:31,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281790463] [2020-08-22 23:05:31,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:31,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 23:05:31,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876564005] [2020-08-22 23:05:31,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 23:05:31,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:31,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 23:05:31,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-22 23:05:31,445 INFO L87 Difference]: Start difference. First operand 384 states and 397 transitions. Second operand 30 states. [2020-08-22 23:05:31,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:31,837 INFO L93 Difference]: Finished difference Result 407 states and 421 transitions. [2020-08-22 23:05:31,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 23:05:31,838 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 418 [2020-08-22 23:05:31,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:31,840 INFO L225 Difference]: With dead ends: 407 [2020-08-22 23:05:31,841 INFO L226 Difference]: Without dead ends: 405 [2020-08-22 23:05:31,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2020-08-22 23:05:31,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2020-08-22 23:05:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 400. [2020-08-22 23:05:31,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-22 23:05:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 414 transitions. [2020-08-22 23:05:31,890 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 414 transitions. Word has length 418 [2020-08-22 23:05:31,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:31,891 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 414 transitions. [2020-08-22 23:05:31,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 23:05:31,892 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 414 transitions. [2020-08-22 23:05:31,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-08-22 23:05:31,895 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:31,895 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:31,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 23:05:31,896 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:31,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:31,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1020812985, now seen corresponding path program 39 times [2020-08-22 23:05:31,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:31,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772750771] [2020-08-22 23:05:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2020-08-22 23:05:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2020-08-22 23:05:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2020-08-22 23:05:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-22 23:05:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-08-22 23:05:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-08-22 23:05:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-08-22 23:05:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-22 23:05:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-08-22 23:05:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-08-22 23:05:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-08-22 23:05:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2020-08-22 23:05:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-08-22 23:05:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-08-22 23:05:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-22 23:05:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-08-22 23:05:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-08-22 23:05:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 23:05:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-08-22 23:05:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-08-22 23:05:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-08-22 23:05:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-08-22 23:05:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-08-22 23:05:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-08-22 23:05:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2020-08-22 23:05:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2020-08-22 23:05:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:33,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5204 backedges. 2054 proven. 1850 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-08-22 23:05:33,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772750771] [2020-08-22 23:05:33,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:33,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-08-22 23:05:33,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891627446] [2020-08-22 23:05:33,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-08-22 23:05:33,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:33,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-08-22 23:05:33,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2020-08-22 23:05:33,942 INFO L87 Difference]: Start difference. First operand 400 states and 414 transitions. Second operand 56 states. [2020-08-22 23:05:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:38,388 INFO L93 Difference]: Finished difference Result 788 states and 880 transitions. [2020-08-22 23:05:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-08-22 23:05:38,388 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 438 [2020-08-22 23:05:38,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:38,392 INFO L225 Difference]: With dead ends: 788 [2020-08-22 23:05:38,392 INFO L226 Difference]: Without dead ends: 617 [2020-08-22 23:05:38,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3645, Invalid=7911, Unknown=0, NotChecked=0, Total=11556 [2020-08-22 23:05:38,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2020-08-22 23:05:38,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 406. [2020-08-22 23:05:38,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-08-22 23:05:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 420 transitions. [2020-08-22 23:05:38,437 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 420 transitions. Word has length 438 [2020-08-22 23:05:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:38,437 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 420 transitions. [2020-08-22 23:05:38,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-08-22 23:05:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 420 transitions. [2020-08-22 23:05:38,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2020-08-22 23:05:38,440 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:38,440 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:38,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 23:05:38,440 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:38,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:38,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1862792015, now seen corresponding path program 40 times [2020-08-22 23:05:38,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:38,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540655390] [2020-08-22 23:05:38,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:40,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2020-08-22 23:05:40,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2020-08-22 23:05:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2020-08-22 23:05:40,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2020-08-22 23:05:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-08-22 23:05:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-22 23:05:40,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2020-08-22 23:05:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2020-08-22 23:05:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-08-22 23:05:40,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-08-22 23:05:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2020-08-22 23:05:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-08-22 23:05:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-22 23:05:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-22 23:05:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-08-22 23:05:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-08-22 23:05:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-08-22 23:05:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-08-22 23:05:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-22 23:05:40,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2020-08-22 23:05:40,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-08-22 23:05:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 390 [2020-08-22 23:05:40,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2020-08-22 23:05:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-08-22 23:05:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2020-08-22 23:05:40,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 430 [2020-08-22 23:05:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:40,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 2054 proven. 2002 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-08-22 23:05:40,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540655390] [2020-08-22 23:05:40,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:40,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-08-22 23:05:40,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591181845] [2020-08-22 23:05:40,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-22 23:05:40,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:40,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-22 23:05:40,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=813, Invalid=2379, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 23:05:40,522 INFO L87 Difference]: Start difference. First operand 406 states and 420 transitions. Second operand 57 states. [2020-08-22 23:05:45,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:45,403 INFO L93 Difference]: Finished difference Result 802 states and 897 transitions. [2020-08-22 23:05:45,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-08-22 23:05:45,403 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 444 [2020-08-22 23:05:45,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:45,407 INFO L225 Difference]: With dead ends: 802 [2020-08-22 23:05:45,407 INFO L226 Difference]: Without dead ends: 631 [2020-08-22 23:05:45,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3891, Invalid=8319, Unknown=0, NotChecked=0, Total=12210 [2020-08-22 23:05:45,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2020-08-22 23:05:45,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 412. [2020-08-22 23:05:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-08-22 23:05:45,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 426 transitions. [2020-08-22 23:05:45,463 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 426 transitions. Word has length 444 [2020-08-22 23:05:45,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:45,464 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 426 transitions. [2020-08-22 23:05:45,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-22 23:05:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 426 transitions. [2020-08-22 23:05:45,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-08-22 23:05:45,468 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:45,468 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:45,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 23:05:45,469 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:45,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:45,469 INFO L82 PathProgramCache]: Analyzing trace with hash 420781911, now seen corresponding path program 41 times [2020-08-22 23:05:45,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:45,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063413008] [2020-08-22 23:05:45,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-08-22 23:05:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-08-22 23:05:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2020-08-22 23:05:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-22 23:05:46,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2020-08-22 23:05:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2020-08-22 23:05:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-08-22 23:05:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-08-22 23:05:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-08-22 23:05:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-08-22 23:05:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-22 23:05:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2020-08-22 23:05:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-08-22 23:05:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-08-22 23:05:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-08-22 23:05:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-08-22 23:05:46,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-08-22 23:05:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-08-22 23:05:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-08-22 23:05:46,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-08-22 23:05:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-08-22 23:05:46,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2020-08-22 23:05:46,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2020-08-22 23:05:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 416 [2020-08-22 23:05:46,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 426 [2020-08-22 23:05:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 436 [2020-08-22 23:05:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 2212 proven. 2002 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2020-08-22 23:05:46,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063413008] [2020-08-22 23:05:46,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:46,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 23:05:46,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318331493] [2020-08-22 23:05:46,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 23:05:46,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:46,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 23:05:46,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-22 23:05:46,373 INFO L87 Difference]: Start difference. First operand 412 states and 426 transitions. Second operand 32 states. [2020-08-22 23:05:46,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:46,812 INFO L93 Difference]: Finished difference Result 435 states and 450 transitions. [2020-08-22 23:05:46,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 23:05:46,813 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 450 [2020-08-22 23:05:46,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:46,815 INFO L225 Difference]: With dead ends: 435 [2020-08-22 23:05:46,816 INFO L226 Difference]: Without dead ends: 433 [2020-08-22 23:05:46,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 23:05:46,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-08-22 23:05:46,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 428. [2020-08-22 23:05:46,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-08-22 23:05:46,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 443 transitions. [2020-08-22 23:05:46,879 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 443 transitions. Word has length 450 [2020-08-22 23:05:46,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:46,880 INFO L479 AbstractCegarLoop]: Abstraction has 428 states and 443 transitions. [2020-08-22 23:05:46,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 23:05:46,880 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 443 transitions. [2020-08-22 23:05:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-08-22 23:05:46,885 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:46,885 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:46,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 23:05:46,886 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:46,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:46,887 INFO L82 PathProgramCache]: Analyzing trace with hash 538100083, now seen corresponding path program 42 times [2020-08-22 23:05:46,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:46,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258901369] [2020-08-22 23:05:46,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2020-08-22 23:05:49,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2020-08-22 23:05:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2020-08-22 23:05:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-22 23:05:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2020-08-22 23:05:49,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2020-08-22 23:05:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-08-22 23:05:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-08-22 23:05:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-08-22 23:05:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-08-22 23:05:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-22 23:05:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2020-08-22 23:05:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-08-22 23:05:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-08-22 23:05:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-08-22 23:05:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-08-22 23:05:49,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-08-22 23:05:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-08-22 23:05:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-08-22 23:05:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-08-22 23:05:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-08-22 23:05:49,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2020-08-22 23:05:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2020-08-22 23:05:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 416 [2020-08-22 23:05:49,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 426 [2020-08-22 23:05:49,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 436 [2020-08-22 23:05:49,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 446 [2020-08-22 23:05:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 456 [2020-08-22 23:05:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6052 backedges. 2380 proven. 2160 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-08-22 23:05:49,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258901369] [2020-08-22 23:05:49,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:49,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-08-22 23:05:49,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663766110] [2020-08-22 23:05:49,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-08-22 23:05:49,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:49,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-08-22 23:05:49,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2020-08-22 23:05:49,268 INFO L87 Difference]: Start difference. First operand 428 states and 443 transitions. Second operand 60 states. [2020-08-22 23:05:54,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:54,625 INFO L93 Difference]: Finished difference Result 844 states and 943 transitions. [2020-08-22 23:05:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-08-22 23:05:54,632 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 470 [2020-08-22 23:05:54,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:54,636 INFO L225 Difference]: With dead ends: 844 [2020-08-22 23:05:54,636 INFO L226 Difference]: Without dead ends: 661 [2020-08-22 23:05:54,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4205, Invalid=9135, Unknown=0, NotChecked=0, Total=13340 [2020-08-22 23:05:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2020-08-22 23:05:54,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 434. [2020-08-22 23:05:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 434 states. [2020-08-22 23:05:54,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 449 transitions. [2020-08-22 23:05:54,709 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 449 transitions. Word has length 470 [2020-08-22 23:05:54,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:54,709 INFO L479 AbstractCegarLoop]: Abstraction has 434 states and 449 transitions. [2020-08-22 23:05:54,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-08-22 23:05:54,709 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 449 transitions. [2020-08-22 23:05:54,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-08-22 23:05:54,713 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:54,714 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:54,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 23:05:54,714 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:54,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:54,715 INFO L82 PathProgramCache]: Analyzing trace with hash 1424552827, now seen corresponding path program 43 times [2020-08-22 23:05:54,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:54,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808252310] [2020-08-22 23:05:54,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:54,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:57,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2020-08-22 23:05:57,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2020-08-22 23:05:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2020-08-22 23:05:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-08-22 23:05:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-08-22 23:05:57,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2020-08-22 23:05:57,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2020-08-22 23:05:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2020-08-22 23:05:57,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-22 23:05:57,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-08-22 23:05:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-08-22 23:05:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-08-22 23:05:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-08-22 23:05:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-08-22 23:05:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-08-22 23:05:57,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-08-22 23:05:57,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-08-22 23:05:57,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-08-22 23:05:57,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-08-22 23:05:57,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 23:05:57,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2020-08-22 23:05:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2020-08-22 23:05:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-22 23:05:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 422 [2020-08-22 23:05:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2020-08-22 23:05:57,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2020-08-22 23:05:57,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2020-08-22 23:05:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-08-22 23:05:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 2380 proven. 2324 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-08-22 23:05:57,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808252310] [2020-08-22 23:05:57,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:57,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-08-22 23:05:57,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133680806] [2020-08-22 23:05:57,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-08-22 23:05:57,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:57,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-08-22 23:05:57,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=931, Invalid=2729, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 23:05:57,303 INFO L87 Difference]: Start difference. First operand 434 states and 449 transitions. Second operand 61 states. [2020-08-22 23:06:03,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:03,253 INFO L93 Difference]: Finished difference Result 858 states and 960 transitions. [2020-08-22 23:06:03,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-08-22 23:06:03,254 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 476 [2020-08-22 23:06:03,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:03,257 INFO L225 Difference]: With dead ends: 858 [2020-08-22 23:06:03,258 INFO L226 Difference]: Without dead ends: 675 [2020-08-22 23:06:03,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4469, Invalid=9573, Unknown=0, NotChecked=0, Total=14042 [2020-08-22 23:06:03,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2020-08-22 23:06:03,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 440. [2020-08-22 23:06:03,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2020-08-22 23:06:03,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 455 transitions. [2020-08-22 23:06:03,317 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 455 transitions. Word has length 476 [2020-08-22 23:06:03,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:03,317 INFO L479 AbstractCegarLoop]: Abstraction has 440 states and 455 transitions. [2020-08-22 23:06:03,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-08-22 23:06:03,318 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 455 transitions. [2020-08-22 23:06:03,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-08-22 23:06:03,321 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:03,322 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:03,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 23:06:03,322 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:03,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:03,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1341948029, now seen corresponding path program 44 times [2020-08-22 23:06:03,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:03,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990334825] [2020-08-22 23:06:03,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:04,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-08-22 23:06:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-08-22 23:06:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-08-22 23:06:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-08-22 23:06:04,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2020-08-22 23:06:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2020-08-22 23:06:04,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-22 23:06:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-08-22 23:06:04,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-08-22 23:06:04,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-08-22 23:06:04,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-08-22 23:06:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-08-22 23:06:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-08-22 23:06:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-22 23:06:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-08-22 23:06:04,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-08-22 23:06:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-08-22 23:06:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-08-22 23:06:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-08-22 23:06:04,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-08-22 23:06:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-08-22 23:06:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-08-22 23:06:04,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-08-22 23:06:04,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-08-22 23:06:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2020-08-22 23:06:04,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-08-22 23:06:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-08-22 23:06:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2020-08-22 23:06:04,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6386 backedges. 2550 proven. 2324 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2020-08-22 23:06:04,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990334825] [2020-08-22 23:06:04,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:04,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 23:06:04,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778224366] [2020-08-22 23:06:04,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 23:06:04,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:04,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 23:06:04,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 23:06:04,451 INFO L87 Difference]: Start difference. First operand 440 states and 455 transitions. Second operand 34 states. [2020-08-22 23:06:04,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:04,967 INFO L93 Difference]: Finished difference Result 463 states and 479 transitions. [2020-08-22 23:06:04,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 23:06:04,968 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 482 [2020-08-22 23:06:04,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:04,971 INFO L225 Difference]: With dead ends: 463 [2020-08-22 23:06:04,971 INFO L226 Difference]: Without dead ends: 461 [2020-08-22 23:06:04,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 23:06:04,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-08-22 23:06:05,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 456. [2020-08-22 23:06:05,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-22 23:06:05,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 472 transitions. [2020-08-22 23:06:05,038 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 472 transitions. Word has length 482 [2020-08-22 23:06:05,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:05,039 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 472 transitions. [2020-08-22 23:06:05,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 23:06:05,039 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 472 transitions. [2020-08-22 23:06:05,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2020-08-22 23:06:05,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:05,044 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:05,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 23:06:05,044 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:05,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:05,045 INFO L82 PathProgramCache]: Analyzing trace with hash -182725729, now seen corresponding path program 45 times [2020-08-22 23:06:05,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:05,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980147968] [2020-08-22 23:06:05,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:05,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2020-08-22 23:06:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2020-08-22 23:06:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2020-08-22 23:06:07,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-08-22 23:06:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2020-08-22 23:06:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2020-08-22 23:06:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-22 23:06:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-08-22 23:06:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-08-22 23:06:07,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-08-22 23:06:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-08-22 23:06:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-08-22 23:06:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-08-22 23:06:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-22 23:06:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-08-22 23:06:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-08-22 23:06:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-08-22 23:06:07,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-08-22 23:06:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-08-22 23:06:07,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-08-22 23:06:07,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-08-22 23:06:07,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-08-22 23:06:07,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-08-22 23:06:07,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-08-22 23:06:07,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2020-08-22 23:06:07,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-08-22 23:06:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-08-22 23:06:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2020-08-22 23:06:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 478 [2020-08-22 23:06:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:07,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 488 [2020-08-22 23:06:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6964 backedges. 2730 proven. 2494 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-08-22 23:06:08,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980147968] [2020-08-22 23:06:08,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:08,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-08-22 23:06:08,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290719686] [2020-08-22 23:06:08,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-08-22 23:06:08,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:08,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-08-22 23:06:08,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-08-22 23:06:08,018 INFO L87 Difference]: Start difference. First operand 456 states and 472 transitions. Second operand 64 states. [2020-08-22 23:06:14,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:14,983 INFO L93 Difference]: Finished difference Result 900 states and 1006 transitions. [2020-08-22 23:06:14,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-08-22 23:06:14,984 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 502 [2020-08-22 23:06:14,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:14,988 INFO L225 Difference]: With dead ends: 900 [2020-08-22 23:06:14,988 INFO L226 Difference]: Without dead ends: 705 [2020-08-22 23:06:14,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1828 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4805, Invalid=10447, Unknown=0, NotChecked=0, Total=15252 [2020-08-22 23:06:14,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2020-08-22 23:06:15,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 462. [2020-08-22 23:06:15,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-08-22 23:06:15,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 478 transitions. [2020-08-22 23:06:15,036 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 478 transitions. Word has length 502 [2020-08-22 23:06:15,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:15,037 INFO L479 AbstractCegarLoop]: Abstraction has 462 states and 478 transitions. [2020-08-22 23:06:15,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-08-22 23:06:15,037 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 478 transitions. [2020-08-22 23:06:15,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-08-22 23:06:15,041 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:15,041 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:15,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 23:06:15,041 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:15,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:15,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1667753383, now seen corresponding path program 46 times [2020-08-22 23:06:15,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:15,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296176089] [2020-08-22 23:06:15,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:15,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2020-08-22 23:06:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2020-08-22 23:06:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 224 [2020-08-22 23:06:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-08-22 23:06:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-22 23:06:17,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-08-22 23:06:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-08-22 23:06:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-08-22 23:06:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2020-08-22 23:06:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-08-22 23:06:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-08-22 23:06:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-22 23:06:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-08-22 23:06:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-08-22 23:06:17,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 23:06:17,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-08-22 23:06:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-08-22 23:06:17,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-08-22 23:06:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-08-22 23:06:17,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-08-22 23:06:17,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-08-22 23:06:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2020-08-22 23:06:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2020-08-22 23:06:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2020-08-22 23:06:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 444 [2020-08-22 23:06:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 454 [2020-08-22 23:06:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 464 [2020-08-22 23:06:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 474 [2020-08-22 23:06:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 484 [2020-08-22 23:06:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:17,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 494 [2020-08-22 23:06:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:18,047 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 2730 proven. 2670 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-08-22 23:06:18,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296176089] [2020-08-22 23:06:18,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:18,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-08-22 23:06:18,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231052140] [2020-08-22 23:06:18,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-08-22 23:06:18,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:18,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-08-22 23:06:18,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2020-08-22 23:06:18,056 INFO L87 Difference]: Start difference. First operand 462 states and 478 transitions. Second operand 65 states. [2020-08-22 23:06:24,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:24,710 INFO L93 Difference]: Finished difference Result 914 states and 1023 transitions. [2020-08-22 23:06:24,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-08-22 23:06:24,711 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 508 [2020-08-22 23:06:24,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:24,716 INFO L225 Difference]: With dead ends: 914 [2020-08-22 23:06:24,716 INFO L226 Difference]: Without dead ends: 719 [2020-08-22 23:06:24,719 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1860 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=5087, Invalid=10915, Unknown=0, NotChecked=0, Total=16002 [2020-08-22 23:06:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 719 states. [2020-08-22 23:06:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 719 to 468. [2020-08-22 23:06:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 468 states. [2020-08-22 23:06:24,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 484 transitions. [2020-08-22 23:06:24,770 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 484 transitions. Word has length 508 [2020-08-22 23:06:24,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:24,771 INFO L479 AbstractCegarLoop]: Abstraction has 468 states and 484 transitions. [2020-08-22 23:06:24,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-08-22 23:06:24,771 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 484 transitions. [2020-08-22 23:06:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2020-08-22 23:06:24,775 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:24,776 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:24,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 23:06:24,776 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:24,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:24,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1072672337, now seen corresponding path program 47 times [2020-08-22 23:06:24,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:24,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096649912] [2020-08-22 23:06:24,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:24,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2020-08-22 23:06:26,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-08-22 23:06:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-22 23:06:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2020-08-22 23:06:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2020-08-22 23:06:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-08-22 23:06:26,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-08-22 23:06:26,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2020-08-22 23:06:26,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-08-22 23:06:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-22 23:06:26,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-22 23:06:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-08-22 23:06:26,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-08-22 23:06:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-08-22 23:06:26,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-08-22 23:06:26,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-22 23:06:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2020-08-22 23:06:26,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-08-22 23:06:26,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 390 [2020-08-22 23:06:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2020-08-22 23:06:26,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-08-22 23:06:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2020-08-22 23:06:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 430 [2020-08-22 23:06:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-08-22 23:06:26,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 450 [2020-08-22 23:06:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 460 [2020-08-22 23:06:26,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-22 23:06:26,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 480 [2020-08-22 23:06:26,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-22 23:06:26,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 500 [2020-08-22 23:06:26,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:26,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7322 backedges. 2912 proven. 2670 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2020-08-22 23:06:26,381 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096649912] [2020-08-22 23:06:26,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:26,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 23:06:26,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97880589] [2020-08-22 23:06:26,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 23:06:26,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:26,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 23:06:26,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 23:06:26,383 INFO L87 Difference]: Start difference. First operand 468 states and 484 transitions. Second operand 36 states. [2020-08-22 23:06:27,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:27,098 INFO L93 Difference]: Finished difference Result 491 states and 508 transitions. [2020-08-22 23:06:27,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 23:06:27,099 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 514 [2020-08-22 23:06:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:27,103 INFO L225 Difference]: With dead ends: 491 [2020-08-22 23:06:27,103 INFO L226 Difference]: Without dead ends: 489 [2020-08-22 23:06:27,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 23:06:27,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-08-22 23:06:27,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 484. [2020-08-22 23:06:27,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-08-22 23:06:27,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 501 transitions. [2020-08-22 23:06:27,166 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 501 transitions. Word has length 514 [2020-08-22 23:06:27,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:27,167 INFO L479 AbstractCegarLoop]: Abstraction has 484 states and 501 transitions. [2020-08-22 23:06:27,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 23:06:27,168 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 501 transitions. [2020-08-22 23:06:27,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 535 [2020-08-22 23:06:27,172 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:27,172 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:27,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 23:06:27,173 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:27,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:27,173 INFO L82 PathProgramCache]: Analyzing trace with hash 718657483, now seen corresponding path program 48 times [2020-08-22 23:06:27,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:27,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097457981] [2020-08-22 23:06:27,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2020-08-22 23:06:30,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2020-08-22 23:06:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 230 [2020-08-22 23:06:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2020-08-22 23:06:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2020-08-22 23:06:30,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-08-22 23:06:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-08-22 23:06:30,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2020-08-22 23:06:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-08-22 23:06:30,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-22 23:06:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-22 23:06:30,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-08-22 23:06:30,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-08-22 23:06:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-08-22 23:06:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-08-22 23:06:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-22 23:06:30,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2020-08-22 23:06:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-08-22 23:06:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 390 [2020-08-22 23:06:30,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2020-08-22 23:06:30,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-08-22 23:06:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2020-08-22 23:06:30,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 430 [2020-08-22 23:06:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-08-22 23:06:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 450 [2020-08-22 23:06:30,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 460 [2020-08-22 23:06:30,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-22 23:06:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 480 [2020-08-22 23:06:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-22 23:06:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 500 [2020-08-22 23:06:30,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 510 [2020-08-22 23:06:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-08-22 23:06:30,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:30,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7940 backedges. 3104 proven. 2852 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-08-22 23:06:30,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097457981] [2020-08-22 23:06:30,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:30,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-08-22 23:06:30,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456363794] [2020-08-22 23:06:30,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-08-22 23:06:30,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:30,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-08-22 23:06:30,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2020-08-22 23:06:30,827 INFO L87 Difference]: Start difference. First operand 484 states and 501 transitions. Second operand 68 states. [2020-08-22 23:06:38,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:38,302 INFO L93 Difference]: Finished difference Result 956 states and 1069 transitions. [2020-08-22 23:06:38,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-08-22 23:06:38,304 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 534 [2020-08-22 23:06:38,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:38,307 INFO L225 Difference]: With dead ends: 956 [2020-08-22 23:06:38,308 INFO L226 Difference]: Without dead ends: 749 [2020-08-22 23:06:38,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2078 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=5445, Invalid=11847, Unknown=0, NotChecked=0, Total=17292 [2020-08-22 23:06:38,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2020-08-22 23:06:38,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 490. [2020-08-22 23:06:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 490 states. [2020-08-22 23:06:38,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 507 transitions. [2020-08-22 23:06:38,384 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 507 transitions. Word has length 534 [2020-08-22 23:06:38,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:38,384 INFO L479 AbstractCegarLoop]: Abstraction has 490 states and 507 transitions. [2020-08-22 23:06:38,384 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-08-22 23:06:38,385 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 507 transitions. [2020-08-22 23:06:38,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2020-08-22 23:06:38,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:38,390 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:38,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 23:06:38,390 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:38,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:38,391 INFO L82 PathProgramCache]: Analyzing trace with hash -2095593005, now seen corresponding path program 49 times [2020-08-22 23:06:38,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:38,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [890408339] [2020-08-22 23:06:38,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:42,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2020-08-22 23:06:42,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2020-08-22 23:06:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 236 [2020-08-22 23:06:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-08-22 23:06:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-08-22 23:06:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-08-22 23:06:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-08-22 23:06:42,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-22 23:06:42,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2020-08-22 23:06:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-08-22 23:06:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-08-22 23:06:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-08-22 23:06:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-08-22 23:06:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-08-22 23:06:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-08-22 23:06:42,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-08-22 23:06:42,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-08-22 23:06:42,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-08-22 23:06:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2020-08-22 23:06:42,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2020-08-22 23:06:42,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 416 [2020-08-22 23:06:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 426 [2020-08-22 23:06:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 436 [2020-08-22 23:06:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 446 [2020-08-22 23:06:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 456 [2020-08-22 23:06:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 466 [2020-08-22 23:06:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 476 [2020-08-22 23:06:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2020-08-22 23:06:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 496 [2020-08-22 23:06:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 506 [2020-08-22 23:06:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 516 [2020-08-22 23:06:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 526 [2020-08-22 23:06:42,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8128 backedges. 3104 proven. 3040 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-08-22 23:06:42,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [890408339] [2020-08-22 23:06:42,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:42,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-08-22 23:06:42,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197302411] [2020-08-22 23:06:42,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-08-22 23:06:42,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:42,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-08-22 23:06:42,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1191, Invalid=3501, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 23:06:42,520 INFO L87 Difference]: Start difference. First operand 490 states and 507 transitions. Second operand 69 states. [2020-08-22 23:06:50,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:50,695 INFO L93 Difference]: Finished difference Result 970 states and 1086 transitions. [2020-08-22 23:06:50,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-08-22 23:06:50,695 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 540 [2020-08-22 23:06:50,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:50,698 INFO L225 Difference]: With dead ends: 970 [2020-08-22 23:06:50,698 INFO L226 Difference]: Without dead ends: 763 [2020-08-22 23:06:50,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=5745, Invalid=12345, Unknown=0, NotChecked=0, Total=18090 [2020-08-22 23:06:50,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2020-08-22 23:06:50,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 496. [2020-08-22 23:06:50,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-22 23:06:50,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 513 transitions. [2020-08-22 23:06:50,775 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 513 transitions. Word has length 540 [2020-08-22 23:06:50,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:50,776 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 513 transitions. [2020-08-22 23:06:50,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-08-22 23:06:50,776 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 513 transitions. [2020-08-22 23:06:50,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2020-08-22 23:06:50,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:50,782 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:50,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 23:06:50,782 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:50,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:50,783 INFO L82 PathProgramCache]: Analyzing trace with hash 835589595, now seen corresponding path program 50 times [2020-08-22 23:06:50,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:50,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050212616] [2020-08-22 23:06:50,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:50,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-08-22 23:06:52,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-08-22 23:06:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2020-08-22 23:06:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2020-08-22 23:06:52,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2020-08-22 23:06:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-22 23:06:52,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-08-22 23:06:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-08-22 23:06:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-08-22 23:06:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-08-22 23:06:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-08-22 23:06:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-08-22 23:06:52,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-08-22 23:06:52,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-08-22 23:06:52,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-08-22 23:06:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-08-22 23:06:52,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 23:06:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2020-08-22 23:06:52,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2020-08-22 23:06:52,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-22 23:06:52,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 422 [2020-08-22 23:06:52,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2020-08-22 23:06:52,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2020-08-22 23:06:52,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2020-08-22 23:06:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-08-22 23:06:52,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 472 [2020-08-22 23:06:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2020-08-22 23:06:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 492 [2020-08-22 23:06:52,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 502 [2020-08-22 23:06:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 512 [2020-08-22 23:06:52,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 522 [2020-08-22 23:06:52,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2020-08-22 23:06:52,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 8322 backedges. 3298 proven. 3040 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2020-08-22 23:06:52,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050212616] [2020-08-22 23:06:52,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:52,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 23:06:52,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824798995] [2020-08-22 23:06:52,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 23:06:52,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:52,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 23:06:52,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 23:06:52,561 INFO L87 Difference]: Start difference. First operand 496 states and 513 transitions. Second operand 38 states. [2020-08-22 23:06:53,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:06:53,350 INFO L93 Difference]: Finished difference Result 519 states and 537 transitions. [2020-08-22 23:06:53,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 23:06:53,352 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 546 [2020-08-22 23:06:53,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:06:53,355 INFO L225 Difference]: With dead ends: 519 [2020-08-22 23:06:53,355 INFO L226 Difference]: Without dead ends: 517 [2020-08-22 23:06:53,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 23:06:53,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2020-08-22 23:06:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 512. [2020-08-22 23:06:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 512 states. [2020-08-22 23:06:53,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 530 transitions. [2020-08-22 23:06:53,407 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 530 transitions. Word has length 546 [2020-08-22 23:06:53,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:06:53,408 INFO L479 AbstractCegarLoop]: Abstraction has 512 states and 530 transitions. [2020-08-22 23:06:53,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 23:06:53,408 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 530 transitions. [2020-08-22 23:06:53,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2020-08-22 23:06:53,413 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:06:53,414 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:06:53,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 23:06:53,414 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:06:53,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:06:53,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1571566089, now seen corresponding path program 51 times [2020-08-22 23:06:53,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:06:53,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952664656] [2020-08-22 23:06:53,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:06:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:57,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:06:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:57,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2020-08-22 23:06:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:57,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 232 [2020-08-22 23:06:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:57,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2020-08-22 23:06:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:57,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2020-08-22 23:06:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:57,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2020-08-22 23:06:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:57,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-22 23:06:57,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:57,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-08-22 23:06:57,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:57,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-08-22 23:06:57,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:57,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-08-22 23:06:57,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:57,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-08-22 23:06:57,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:57,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-08-22 23:06:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:57,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-08-22 23:06:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-08-22 23:06:58,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-08-22 23:06:58,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-08-22 23:06:58,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-08-22 23:06:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 23:06:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2020-08-22 23:06:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2020-08-22 23:06:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-22 23:06:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 422 [2020-08-22 23:06:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2020-08-22 23:06:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2020-08-22 23:06:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2020-08-22 23:06:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-08-22 23:06:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 472 [2020-08-22 23:06:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2020-08-22 23:06:58,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 492 [2020-08-22 23:06:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 502 [2020-08-22 23:06:58,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 512 [2020-08-22 23:06:58,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 522 [2020-08-22 23:06:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2020-08-22 23:06:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 542 [2020-08-22 23:06:58,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 552 [2020-08-22 23:06:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:06:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 8980 backedges. 3502 proven. 3234 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-08-22 23:06:58,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952664656] [2020-08-22 23:06:58,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:06:58,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-08-22 23:06:58,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646776738] [2020-08-22 23:06:58,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-08-22 23:06:58,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:06:58,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-08-22 23:06:58,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2020-08-22 23:06:58,269 INFO L87 Difference]: Start difference. First operand 512 states and 530 transitions. Second operand 72 states. [2020-08-22 23:07:07,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:07,965 INFO L93 Difference]: Finished difference Result 1012 states and 1132 transitions. [2020-08-22 23:07:07,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-08-22 23:07:07,967 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 566 [2020-08-22 23:07:07,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:07,971 INFO L225 Difference]: With dead ends: 1012 [2020-08-22 23:07:07,971 INFO L226 Difference]: Without dead ends: 793 [2020-08-22 23:07:07,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=6125, Invalid=13335, Unknown=0, NotChecked=0, Total=19460 [2020-08-22 23:07:07,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2020-08-22 23:07:08,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 518. [2020-08-22 23:07:08,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 518 states. [2020-08-22 23:07:08,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 536 transitions. [2020-08-22 23:07:08,033 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 536 transitions. Word has length 566 [2020-08-22 23:07:08,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:08,034 INFO L479 AbstractCegarLoop]: Abstraction has 518 states and 536 transitions. [2020-08-22 23:07:08,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-08-22 23:07:08,034 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 536 transitions. [2020-08-22 23:07:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2020-08-22 23:07:08,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:08,040 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:08,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 23:07:08,040 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:08,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:08,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1794400257, now seen corresponding path program 52 times [2020-08-22 23:07:08,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:08,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363551649] [2020-08-22 23:07:08,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:08,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:13,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 228 [2020-08-22 23:07:13,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 238 [2020-08-22 23:07:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 248 [2020-08-22 23:07:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-22 23:07:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-08-22 23:07:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-08-22 23:07:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-08-22 23:07:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-08-22 23:07:13,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-08-22 23:07:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-08-22 23:07:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-22 23:07:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-08-22 23:07:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-08-22 23:07:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-08-22 23:07:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-08-22 23:07:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-08-22 23:07:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-08-22 23:07:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-08-22 23:07:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-08-22 23:07:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-08-22 23:07:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-08-22 23:07:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2020-08-22 23:07:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-08-22 23:07:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-08-22 23:07:13,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2020-08-22 23:07:13,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 478 [2020-08-22 23:07:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 488 [2020-08-22 23:07:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 498 [2020-08-22 23:07:13,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 508 [2020-08-22 23:07:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 518 [2020-08-22 23:07:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 528 [2020-08-22 23:07:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 538 [2020-08-22 23:07:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 548 [2020-08-22 23:07:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-22 23:07:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9180 backedges. 3502 proven. 3434 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-08-22 23:07:13,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363551649] [2020-08-22 23:07:13,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:13,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-08-22 23:07:13,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764606908] [2020-08-22 23:07:13,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-08-22 23:07:13,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:13,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-08-22 23:07:13,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1333, Invalid=3923, Unknown=0, NotChecked=0, Total=5256 [2020-08-22 23:07:13,321 INFO L87 Difference]: Start difference. First operand 518 states and 536 transitions. Second operand 73 states. [2020-08-22 23:07:23,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:23,747 INFO L93 Difference]: Finished difference Result 1026 states and 1149 transitions. [2020-08-22 23:07:23,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-08-22 23:07:23,747 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 572 [2020-08-22 23:07:23,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:23,751 INFO L225 Difference]: With dead ends: 1026 [2020-08-22 23:07:23,751 INFO L226 Difference]: Without dead ends: 807 [2020-08-22 23:07:23,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2380 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=6443, Invalid=13863, Unknown=0, NotChecked=0, Total=20306 [2020-08-22 23:07:23,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2020-08-22 23:07:23,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 524. [2020-08-22 23:07:23,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524 states. [2020-08-22 23:07:23,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 542 transitions. [2020-08-22 23:07:23,814 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 542 transitions. Word has length 572 [2020-08-22 23:07:23,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:23,814 INFO L479 AbstractCegarLoop]: Abstraction has 524 states and 542 transitions. [2020-08-22 23:07:23,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-08-22 23:07:23,815 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 542 transitions. [2020-08-22 23:07:23,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2020-08-22 23:07:23,821 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:23,821 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:23,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 23:07:23,822 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:23,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:23,822 INFO L82 PathProgramCache]: Analyzing trace with hash -430978041, now seen corresponding path program 53 times [2020-08-22 23:07:23,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:23,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301764463] [2020-08-22 23:07:23,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-08-22 23:07:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-22 23:07:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-08-22 23:07:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-08-22 23:07:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-08-22 23:07:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2020-08-22 23:07:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-08-22 23:07:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-08-22 23:07:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-22 23:07:25,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-08-22 23:07:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-08-22 23:07:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 23:07:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-08-22 23:07:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-08-22 23:07:25,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-08-22 23:07:25,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-08-22 23:07:25,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-08-22 23:07:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-08-22 23:07:25,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2020-08-22 23:07:25,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2020-08-22 23:07:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2020-08-22 23:07:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 444 [2020-08-22 23:07:25,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 454 [2020-08-22 23:07:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 464 [2020-08-22 23:07:25,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 474 [2020-08-22 23:07:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 484 [2020-08-22 23:07:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 494 [2020-08-22 23:07:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2020-08-22 23:07:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2020-08-22 23:07:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 524 [2020-08-22 23:07:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 534 [2020-08-22 23:07:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 544 [2020-08-22 23:07:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 554 [2020-08-22 23:07:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:25,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 564 [2020-08-22 23:07:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9386 backedges. 3708 proven. 3434 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2020-08-22 23:07:26,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301764463] [2020-08-22 23:07:26,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:26,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 23:07:26,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754589243] [2020-08-22 23:07:26,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 23:07:26,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:26,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 23:07:26,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 23:07:26,084 INFO L87 Difference]: Start difference. First operand 524 states and 542 transitions. Second operand 40 states. [2020-08-22 23:07:27,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:27,103 INFO L93 Difference]: Finished difference Result 547 states and 566 transitions. [2020-08-22 23:07:27,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 23:07:27,105 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 578 [2020-08-22 23:07:27,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:27,108 INFO L225 Difference]: With dead ends: 547 [2020-08-22 23:07:27,109 INFO L226 Difference]: Without dead ends: 545 [2020-08-22 23:07:27,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 23:07:27,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2020-08-22 23:07:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 540. [2020-08-22 23:07:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 540 states. [2020-08-22 23:07:27,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 559 transitions. [2020-08-22 23:07:27,168 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 559 transitions. Word has length 578 [2020-08-22 23:07:27,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:27,169 INFO L479 AbstractCegarLoop]: Abstraction has 540 states and 559 transitions. [2020-08-22 23:07:27,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 23:07:27,169 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 559 transitions. [2020-08-22 23:07:27,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2020-08-22 23:07:27,175 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:27,176 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:27,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 23:07:27,176 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:27,177 INFO L82 PathProgramCache]: Analyzing trace with hash -181881309, now seen corresponding path program 54 times [2020-08-22 23:07:27,177 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:27,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346317570] [2020-08-22 23:07:27,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 234 [2020-08-22 23:07:32,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2020-08-22 23:07:32,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 254 [2020-08-22 23:07:32,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-08-22 23:07:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-08-22 23:07:32,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2020-08-22 23:07:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-08-22 23:07:32,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-08-22 23:07:32,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-22 23:07:32,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-08-22 23:07:32,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-08-22 23:07:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 23:07:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-08-22 23:07:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-08-22 23:07:32,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-08-22 23:07:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-08-22 23:07:32,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-08-22 23:07:32,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-08-22 23:07:32,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2020-08-22 23:07:32,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2020-08-22 23:07:32,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2020-08-22 23:07:32,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 444 [2020-08-22 23:07:32,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 454 [2020-08-22 23:07:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 464 [2020-08-22 23:07:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 474 [2020-08-22 23:07:32,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 484 [2020-08-22 23:07:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 494 [2020-08-22 23:07:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2020-08-22 23:07:32,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2020-08-22 23:07:32,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 524 [2020-08-22 23:07:32,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 534 [2020-08-22 23:07:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 544 [2020-08-22 23:07:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 554 [2020-08-22 23:07:32,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 564 [2020-08-22 23:07:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 574 [2020-08-22 23:07:32,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:32,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 584 [2020-08-22 23:07:32,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:33,158 INFO L134 CoverageAnalysis]: Checked inductivity of 10084 backedges. 3924 proven. 3640 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-08-22 23:07:33,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346317570] [2020-08-22 23:07:33,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:33,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-08-22 23:07:33,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932194735] [2020-08-22 23:07:33,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-08-22 23:07:33,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:33,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-08-22 23:07:33,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2020-08-22 23:07:33,161 INFO L87 Difference]: Start difference. First operand 540 states and 559 transitions. Second operand 76 states. [2020-08-22 23:07:45,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:07:45,466 INFO L93 Difference]: Finished difference Result 1068 states and 1195 transitions. [2020-08-22 23:07:45,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2020-08-22 23:07:45,469 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 598 [2020-08-22 23:07:45,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:07:45,474 INFO L225 Difference]: With dead ends: 1068 [2020-08-22 23:07:45,474 INFO L226 Difference]: Without dead ends: 837 [2020-08-22 23:07:45,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2626 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=6845, Invalid=14911, Unknown=0, NotChecked=0, Total=21756 [2020-08-22 23:07:45,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2020-08-22 23:07:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 546. [2020-08-22 23:07:45,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 546 states. [2020-08-22 23:07:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 565 transitions. [2020-08-22 23:07:45,540 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 565 transitions. Word has length 598 [2020-08-22 23:07:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:07:45,540 INFO L479 AbstractCegarLoop]: Abstraction has 546 states and 565 transitions. [2020-08-22 23:07:45,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-08-22 23:07:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 565 transitions. [2020-08-22 23:07:45,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2020-08-22 23:07:45,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:07:45,544 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:07:45,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 23:07:45,545 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:07:45,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:07:45,545 INFO L82 PathProgramCache]: Analyzing trace with hash 852912171, now seen corresponding path program 55 times [2020-08-22 23:07:45,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:07:45,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296760741] [2020-08-22 23:07:45,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:07:45,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:07:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 240 [2020-08-22 23:07:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 250 [2020-08-22 23:07:52,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 260 [2020-08-22 23:07:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-08-22 23:07:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2020-08-22 23:07:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-08-22 23:07:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-22 23:07:52,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-22 23:07:52,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-08-22 23:07:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-08-22 23:07:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-08-22 23:07:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-08-22 23:07:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-22 23:07:52,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2020-08-22 23:07:52,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-08-22 23:07:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 390 [2020-08-22 23:07:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2020-08-22 23:07:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-08-22 23:07:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2020-08-22 23:07:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 430 [2020-08-22 23:07:52,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-08-22 23:07:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 450 [2020-08-22 23:07:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 460 [2020-08-22 23:07:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-22 23:07:52,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 480 [2020-08-22 23:07:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-22 23:07:52,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 500 [2020-08-22 23:07:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 510 [2020-08-22 23:07:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-08-22 23:07:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 530 [2020-08-22 23:07:52,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 540 [2020-08-22 23:07:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-22 23:07:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 560 [2020-08-22 23:07:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 570 [2020-08-22 23:07:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 580 [2020-08-22 23:07:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 590 [2020-08-22 23:07:52,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:07:52,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 3924 proven. 3852 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-08-22 23:07:52,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296760741] [2020-08-22 23:07:52,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:07:52,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-08-22 23:07:52,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29399728] [2020-08-22 23:07:52,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-08-22 23:07:52,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:07:52,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-08-22 23:07:52,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1483, Invalid=4369, Unknown=0, NotChecked=0, Total=5852 [2020-08-22 23:07:52,552 INFO L87 Difference]: Start difference. First operand 546 states and 565 transitions. Second operand 77 states. [2020-08-22 23:08:07,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:08:07,158 INFO L93 Difference]: Finished difference Result 1082 states and 1212 transitions. [2020-08-22 23:08:07,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2020-08-22 23:08:07,158 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 604 [2020-08-22 23:08:07,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:08:07,164 INFO L225 Difference]: With dead ends: 1082 [2020-08-22 23:08:07,165 INFO L226 Difference]: Without dead ends: 851 [2020-08-22 23:08:07,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2664 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=7181, Invalid=15469, Unknown=0, NotChecked=0, Total=22650 [2020-08-22 23:08:07,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2020-08-22 23:08:07,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 552. [2020-08-22 23:08:07,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-22 23:08:07,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 571 transitions. [2020-08-22 23:08:07,271 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 571 transitions. Word has length 604 [2020-08-22 23:08:07,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:08:07,271 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 571 transitions. [2020-08-22 23:08:07,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-08-22 23:08:07,272 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 571 transitions. [2020-08-22 23:08:07,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2020-08-22 23:08:07,276 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:08:07,276 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:08:07,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 23:08:07,277 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:08:07,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:08:07,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1999139891, now seen corresponding path program 56 times [2020-08-22 23:08:07,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:08:07,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1543154866] [2020-08-22 23:08:07,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:08:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:08:09,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-08-22 23:08:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-08-22 23:08:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-08-22 23:08:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-08-22 23:08:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-22 23:08:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2020-08-22 23:08:09,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-08-22 23:08:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-08-22 23:08:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-08-22 23:08:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-08-22 23:08:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-08-22 23:08:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-08-22 23:08:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-08-22 23:08:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-08-22 23:08:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-08-22 23:08:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2020-08-22 23:08:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2020-08-22 23:08:09,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 416 [2020-08-22 23:08:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 426 [2020-08-22 23:08:09,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 436 [2020-08-22 23:08:09,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 446 [2020-08-22 23:08:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 456 [2020-08-22 23:08:09,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 466 [2020-08-22 23:08:09,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 476 [2020-08-22 23:08:09,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2020-08-22 23:08:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 496 [2020-08-22 23:08:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 506 [2020-08-22 23:08:09,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 516 [2020-08-22 23:08:09,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 526 [2020-08-22 23:08:09,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 536 [2020-08-22 23:08:09,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-08-22 23:08:09,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 556 [2020-08-22 23:08:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 566 [2020-08-22 23:08:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-22 23:08:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 586 [2020-08-22 23:08:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:09,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 596 [2020-08-22 23:08:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:10,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10514 backedges. 4142 proven. 3852 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2020-08-22 23:08:10,222 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1543154866] [2020-08-22 23:08:10,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:08:10,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 23:08:10,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146865656] [2020-08-22 23:08:10,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 23:08:10,224 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:08:10,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 23:08:10,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 23:08:10,224 INFO L87 Difference]: Start difference. First operand 552 states and 571 transitions. Second operand 42 states. [2020-08-22 23:08:11,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:08:11,568 INFO L93 Difference]: Finished difference Result 575 states and 595 transitions. [2020-08-22 23:08:11,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 23:08:11,571 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 610 [2020-08-22 23:08:11,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:08:11,576 INFO L225 Difference]: With dead ends: 575 [2020-08-22 23:08:11,576 INFO L226 Difference]: Without dead ends: 573 [2020-08-22 23:08:11,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 23:08:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2020-08-22 23:08:11,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 568. [2020-08-22 23:08:11,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 568 states. [2020-08-22 23:08:11,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 588 transitions. [2020-08-22 23:08:11,643 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 588 transitions. Word has length 610 [2020-08-22 23:08:11,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:08:11,644 INFO L479 AbstractCegarLoop]: Abstraction has 568 states and 588 transitions. [2020-08-22 23:08:11,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 23:08:11,644 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 588 transitions. [2020-08-22 23:08:11,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2020-08-22 23:08:11,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:08:11,649 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:08:11,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 23:08:11,649 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:08:11,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:08:11,650 INFO L82 PathProgramCache]: Analyzing trace with hash 895979599, now seen corresponding path program 57 times [2020-08-22 23:08:11,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:08:11,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152604692] [2020-08-22 23:08:11,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:08:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:08:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 246 [2020-08-22 23:08:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 256 [2020-08-22 23:08:19,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 266 [2020-08-22 23:08:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-08-22 23:08:19,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-22 23:08:19,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2020-08-22 23:08:19,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-08-22 23:08:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-08-22 23:08:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-08-22 23:08:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-08-22 23:08:19,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-08-22 23:08:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-08-22 23:08:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-08-22 23:08:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-08-22 23:08:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-08-22 23:08:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2020-08-22 23:08:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2020-08-22 23:08:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 416 [2020-08-22 23:08:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 426 [2020-08-22 23:08:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 436 [2020-08-22 23:08:19,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 446 [2020-08-22 23:08:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 456 [2020-08-22 23:08:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 466 [2020-08-22 23:08:19,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 476 [2020-08-22 23:08:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2020-08-22 23:08:19,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 496 [2020-08-22 23:08:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 506 [2020-08-22 23:08:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 516 [2020-08-22 23:08:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 526 [2020-08-22 23:08:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 536 [2020-08-22 23:08:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-08-22 23:08:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 556 [2020-08-22 23:08:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 566 [2020-08-22 23:08:19,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-22 23:08:19,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 586 [2020-08-22 23:08:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 596 [2020-08-22 23:08:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 606 [2020-08-22 23:08:19,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 616 [2020-08-22 23:08:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11252 backedges. 4370 proven. 4070 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-08-22 23:08:19,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152604692] [2020-08-22 23:08:19,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:08:19,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-08-22 23:08:19,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339793364] [2020-08-22 23:08:19,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-08-22 23:08:19,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:08:19,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-08-22 23:08:19,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2020-08-22 23:08:19,825 INFO L87 Difference]: Start difference. First operand 568 states and 588 transitions. Second operand 80 states. [2020-08-22 23:08:35,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:08:35,911 INFO L93 Difference]: Finished difference Result 1124 states and 1258 transitions. [2020-08-22 23:08:35,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2020-08-22 23:08:35,914 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 630 [2020-08-22 23:08:35,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:08:35,919 INFO L225 Difference]: With dead ends: 1124 [2020-08-22 23:08:35,919 INFO L226 Difference]: Without dead ends: 881 [2020-08-22 23:08:35,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2924 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=7605, Invalid=16575, Unknown=0, NotChecked=0, Total=24180 [2020-08-22 23:08:35,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2020-08-22 23:08:35,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 574. [2020-08-22 23:08:35,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 574 states. [2020-08-22 23:08:35,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 594 transitions. [2020-08-22 23:08:35,990 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 594 transitions. Word has length 630 [2020-08-22 23:08:35,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:08:35,991 INFO L479 AbstractCegarLoop]: Abstraction has 574 states and 594 transitions. [2020-08-22 23:08:35,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-08-22 23:08:35,991 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 594 transitions. [2020-08-22 23:08:35,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2020-08-22 23:08:35,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:08:35,995 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:08:35,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 23:08:35,996 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:08:35,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:08:35,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1854612055, now seen corresponding path program 58 times [2020-08-22 23:08:35,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:08:35,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142117167] [2020-08-22 23:08:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:08:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:08:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 252 [2020-08-22 23:08:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 262 [2020-08-22 23:08:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 272 [2020-08-22 23:08:44,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-08-22 23:08:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-08-22 23:08:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-08-22 23:08:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-08-22 23:08:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-08-22 23:08:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-08-22 23:08:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-08-22 23:08:44,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-08-22 23:08:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-08-22 23:08:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-08-22 23:08:44,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 23:08:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2020-08-22 23:08:44,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2020-08-22 23:08:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-22 23:08:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 422 [2020-08-22 23:08:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2020-08-22 23:08:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2020-08-22 23:08:44,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2020-08-22 23:08:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-08-22 23:08:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 472 [2020-08-22 23:08:44,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2020-08-22 23:08:44,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 492 [2020-08-22 23:08:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 502 [2020-08-22 23:08:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 512 [2020-08-22 23:08:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 522 [2020-08-22 23:08:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2020-08-22 23:08:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 542 [2020-08-22 23:08:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 552 [2020-08-22 23:08:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 562 [2020-08-22 23:08:44,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 572 [2020-08-22 23:08:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 582 [2020-08-22 23:08:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 592 [2020-08-22 23:08:44,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 602 [2020-08-22 23:08:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 612 [2020-08-22 23:08:44,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 622 [2020-08-22 23:08:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:08:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11476 backedges. 4370 proven. 4294 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-08-22 23:08:44,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142117167] [2020-08-22 23:08:44,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:08:44,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-08-22 23:08:44,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608287086] [2020-08-22 23:08:44,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-08-22 23:08:44,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:08:44,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-08-22 23:08:44,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1641, Invalid=4839, Unknown=0, NotChecked=0, Total=6480 [2020-08-22 23:08:44,762 INFO L87 Difference]: Start difference. First operand 574 states and 594 transitions. Second operand 81 states. [2020-08-22 23:09:03,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:09:03,615 INFO L93 Difference]: Finished difference Result 1138 states and 1275 transitions. [2020-08-22 23:09:03,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-08-22 23:09:03,616 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 636 [2020-08-22 23:09:03,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:09:03,623 INFO L225 Difference]: With dead ends: 1138 [2020-08-22 23:09:03,623 INFO L226 Difference]: Without dead ends: 895 [2020-08-22 23:09:03,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=7959, Invalid=17163, Unknown=0, NotChecked=0, Total=25122 [2020-08-22 23:09:03,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2020-08-22 23:09:03,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 580. [2020-08-22 23:09:03,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 580 states. [2020-08-22 23:09:03,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 600 transitions. [2020-08-22 23:09:03,709 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 600 transitions. Word has length 636 [2020-08-22 23:09:03,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:09:03,709 INFO L479 AbstractCegarLoop]: Abstraction has 580 states and 600 transitions. [2020-08-22 23:09:03,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-08-22 23:09:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 600 transitions. [2020-08-22 23:09:03,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2020-08-22 23:09:03,714 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:09:03,714 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 39, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:09:03,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 23:09:03,715 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:09:03,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:09:03,715 INFO L82 PathProgramCache]: Analyzing trace with hash -160756129, now seen corresponding path program 59 times [2020-08-22 23:09:03,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:09:03,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088338275] [2020-08-22 23:09:03,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:09:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:09:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-22 23:09:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-08-22 23:09:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-08-22 23:09:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-08-22 23:09:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-08-22 23:09:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-08-22 23:09:07,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-08-22 23:09:07,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-22 23:09:07,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-08-22 23:09:07,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-08-22 23:09:07,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-08-22 23:09:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-08-22 23:09:07,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-08-22 23:09:07,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-08-22 23:09:07,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-08-22 23:09:07,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-08-22 23:09:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-08-22 23:09:07,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-08-22 23:09:07,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2020-08-22 23:09:07,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-08-22 23:09:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-08-22 23:09:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2020-08-22 23:09:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 478 [2020-08-22 23:09:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 488 [2020-08-22 23:09:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 498 [2020-08-22 23:09:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 508 [2020-08-22 23:09:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 518 [2020-08-22 23:09:07,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 528 [2020-08-22 23:09:07,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 538 [2020-08-22 23:09:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 548 [2020-08-22 23:09:07,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-22 23:09:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 568 [2020-08-22 23:09:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 578 [2020-08-22 23:09:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 588 [2020-08-22 23:09:07,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 598 [2020-08-22 23:09:07,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 608 [2020-08-22 23:09:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 618 [2020-08-22 23:09:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 628 [2020-08-22 23:09:07,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 11706 backedges. 4600 proven. 4294 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2020-08-22 23:09:07,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088338275] [2020-08-22 23:09:07,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:09:07,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-08-22 23:09:07,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479949493] [2020-08-22 23:09:07,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 23:09:07,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:09:07,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 23:09:07,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 23:09:07,490 INFO L87 Difference]: Start difference. First operand 580 states and 600 transitions. Second operand 44 states. [2020-08-22 23:09:09,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:09:09,027 INFO L93 Difference]: Finished difference Result 603 states and 624 transitions. [2020-08-22 23:09:09,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-22 23:09:09,031 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 642 [2020-08-22 23:09:09,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:09:09,036 INFO L225 Difference]: With dead ends: 603 [2020-08-22 23:09:09,036 INFO L226 Difference]: Without dead ends: 601 [2020-08-22 23:09:09,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 23:09:09,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2020-08-22 23:09:09,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 596. [2020-08-22 23:09:09,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 596 states. [2020-08-22 23:09:09,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 617 transitions. [2020-08-22 23:09:09,113 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 617 transitions. Word has length 642 [2020-08-22 23:09:09,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:09:09,114 INFO L479 AbstractCegarLoop]: Abstraction has 596 states and 617 transitions. [2020-08-22 23:09:09,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 23:09:09,114 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 617 transitions. [2020-08-22 23:09:09,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2020-08-22 23:09:09,119 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:09:09,119 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:09:09,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-22 23:09:09,120 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:09:09,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:09:09,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1381802885, now seen corresponding path program 60 times [2020-08-22 23:09:09,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:09:09,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319919133] [2020-08-22 23:09:09,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:09:09,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:09:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 258 [2020-08-22 23:09:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 268 [2020-08-22 23:09:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2020-08-22 23:09:19,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-08-22 23:09:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-08-22 23:09:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-08-22 23:09:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-08-22 23:09:19,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-22 23:09:19,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-08-22 23:09:19,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-08-22 23:09:19,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-08-22 23:09:19,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-08-22 23:09:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-08-22 23:09:19,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-08-22 23:09:19,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-08-22 23:09:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-08-22 23:09:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-08-22 23:09:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-08-22 23:09:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2020-08-22 23:09:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-08-22 23:09:19,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-08-22 23:09:19,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2020-08-22 23:09:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 478 [2020-08-22 23:09:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 488 [2020-08-22 23:09:19,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 498 [2020-08-22 23:09:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 508 [2020-08-22 23:09:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 518 [2020-08-22 23:09:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 528 [2020-08-22 23:09:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 538 [2020-08-22 23:09:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 548 [2020-08-22 23:09:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-22 23:09:19,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 568 [2020-08-22 23:09:19,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 578 [2020-08-22 23:09:19,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 588 [2020-08-22 23:09:19,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 598 [2020-08-22 23:09:19,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 608 [2020-08-22 23:09:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 618 [2020-08-22 23:09:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 628 [2020-08-22 23:09:19,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 638 [2020-08-22 23:09:19,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 648 [2020-08-22 23:09:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:19,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12484 backedges. 4840 proven. 4524 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2020-08-22 23:09:19,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319919133] [2020-08-22 23:09:19,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:09:19,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-08-22 23:09:19,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160549151] [2020-08-22 23:09:19,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-08-22 23:09:19,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:09:19,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-08-22 23:09:19,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2020-08-22 23:09:19,660 INFO L87 Difference]: Start difference. First operand 596 states and 617 transitions. Second operand 84 states. [2020-08-22 23:09:39,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:09:39,527 INFO L93 Difference]: Finished difference Result 1180 states and 1321 transitions. [2020-08-22 23:09:39,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2020-08-22 23:09:39,531 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 662 [2020-08-22 23:09:39,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:09:39,536 INFO L225 Difference]: With dead ends: 1180 [2020-08-22 23:09:39,536 INFO L226 Difference]: Without dead ends: 925 [2020-08-22 23:09:39,540 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3238 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=8405, Invalid=18327, Unknown=0, NotChecked=0, Total=26732 [2020-08-22 23:09:39,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 925 states. [2020-08-22 23:09:39,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 925 to 602. [2020-08-22 23:09:39,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 602 states. [2020-08-22 23:09:39,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 623 transitions. [2020-08-22 23:09:39,622 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 623 transitions. Word has length 662 [2020-08-22 23:09:39,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:09:39,622 INFO L479 AbstractCegarLoop]: Abstraction has 602 states and 623 transitions. [2020-08-22 23:09:39,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-08-22 23:09:39,622 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 623 transitions. [2020-08-22 23:09:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 669 [2020-08-22 23:09:39,627 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:09:39,627 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:09:39,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-22 23:09:39,628 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:09:39,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:09:39,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1833120125, now seen corresponding path program 61 times [2020-08-22 23:09:39,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:09:39,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361172268] [2020-08-22 23:09:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:09:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:09:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 264 [2020-08-22 23:09:50,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 274 [2020-08-22 23:09:50,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 284 [2020-08-22 23:09:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-08-22 23:09:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-08-22 23:09:50,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-22 23:09:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-08-22 23:09:50,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-08-22 23:09:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 23:09:50,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-08-22 23:09:50,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-08-22 23:09:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-08-22 23:09:50,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-08-22 23:09:50,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-08-22 23:09:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-08-22 23:09:50,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2020-08-22 23:09:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2020-08-22 23:09:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2020-08-22 23:09:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 444 [2020-08-22 23:09:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 454 [2020-08-22 23:09:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 464 [2020-08-22 23:09:50,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 474 [2020-08-22 23:09:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 484 [2020-08-22 23:09:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 494 [2020-08-22 23:09:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2020-08-22 23:09:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2020-08-22 23:09:50,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 524 [2020-08-22 23:09:50,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 534 [2020-08-22 23:09:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 544 [2020-08-22 23:09:50,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 554 [2020-08-22 23:09:50,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 564 [2020-08-22 23:09:50,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 574 [2020-08-22 23:09:50,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 584 [2020-08-22 23:09:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 594 [2020-08-22 23:09:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 604 [2020-08-22 23:09:50,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 614 [2020-08-22 23:09:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 624 [2020-08-22 23:09:50,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 634 [2020-08-22 23:09:50,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 644 [2020-08-22 23:09:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:50,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 654 [2020-08-22 23:09:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:09:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12720 backedges. 4840 proven. 4760 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2020-08-22 23:09:51,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361172268] [2020-08-22 23:09:51,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:09:51,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-08-22 23:09:51,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014794511] [2020-08-22 23:09:51,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-08-22 23:09:51,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:09:51,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-08-22 23:09:51,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1807, Invalid=5333, Unknown=0, NotChecked=0, Total=7140 [2020-08-22 23:09:51,212 INFO L87 Difference]: Start difference. First operand 602 states and 623 transitions. Second operand 85 states. [2020-08-22 23:10:13,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:10:13,833 INFO L93 Difference]: Finished difference Result 1194 states and 1338 transitions. [2020-08-22 23:10:13,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2020-08-22 23:10:13,833 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 668 [2020-08-22 23:10:13,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:10:13,839 INFO L225 Difference]: With dead ends: 1194 [2020-08-22 23:10:13,839 INFO L226 Difference]: Without dead ends: 939 [2020-08-22 23:10:13,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3280 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=8777, Invalid=18945, Unknown=0, NotChecked=0, Total=27722 [2020-08-22 23:10:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2020-08-22 23:10:13,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 608. [2020-08-22 23:10:13,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 608 states. [2020-08-22 23:10:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 629 transitions. [2020-08-22 23:10:13,929 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 629 transitions. Word has length 668 [2020-08-22 23:10:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:10:13,930 INFO L479 AbstractCegarLoop]: Abstraction has 608 states and 629 transitions. [2020-08-22 23:10:13,930 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-08-22 23:10:13,930 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 629 transitions. [2020-08-22 23:10:13,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 675 [2020-08-22 23:10:13,937 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:10:13,937 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 41, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:10:13,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-08-22 23:10:13,938 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:10:13,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:10:13,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1364551029, now seen corresponding path program 62 times [2020-08-22 23:10:13,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:10:13,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237089833] [2020-08-22 23:10:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:10:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:10:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-08-22 23:10:18,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2020-08-22 23:10:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-08-22 23:10:18,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-22 23:10:18,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-22 23:10:18,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-08-22 23:10:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-08-22 23:10:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-08-22 23:10:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-08-22 23:10:18,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-22 23:10:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2020-08-22 23:10:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-08-22 23:10:18,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 390 [2020-08-22 23:10:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2020-08-22 23:10:18,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-08-22 23:10:18,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2020-08-22 23:10:18,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 430 [2020-08-22 23:10:18,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-08-22 23:10:18,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 450 [2020-08-22 23:10:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 460 [2020-08-22 23:10:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-22 23:10:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 480 [2020-08-22 23:10:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-22 23:10:18,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 500 [2020-08-22 23:10:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 510 [2020-08-22 23:10:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-08-22 23:10:18,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 530 [2020-08-22 23:10:18,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 540 [2020-08-22 23:10:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-22 23:10:18,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 560 [2020-08-22 23:10:18,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 570 [2020-08-22 23:10:18,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 580 [2020-08-22 23:10:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 590 [2020-08-22 23:10:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 600 [2020-08-22 23:10:18,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 610 [2020-08-22 23:10:18,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 620 [2020-08-22 23:10:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 630 [2020-08-22 23:10:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 640 [2020-08-22 23:10:18,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 650 [2020-08-22 23:10:18,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-08-22 23:10:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:18,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12962 backedges. 5082 proven. 4760 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2020-08-22 23:10:18,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237089833] [2020-08-22 23:10:18,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:10:18,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-08-22 23:10:18,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705395520] [2020-08-22 23:10:18,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 23:10:18,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:10:18,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 23:10:18,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 23:10:18,676 INFO L87 Difference]: Start difference. First operand 608 states and 629 transitions. Second operand 46 states. [2020-08-22 23:10:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:10:20,786 INFO L93 Difference]: Finished difference Result 631 states and 653 transitions. [2020-08-22 23:10:20,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 23:10:20,791 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 674 [2020-08-22 23:10:20,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:10:20,798 INFO L225 Difference]: With dead ends: 631 [2020-08-22 23:10:20,798 INFO L226 Difference]: Without dead ends: 629 [2020-08-22 23:10:20,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 23:10:20,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2020-08-22 23:10:20,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 624. [2020-08-22 23:10:20,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 624 states. [2020-08-22 23:10:20,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 646 transitions. [2020-08-22 23:10:20,897 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 646 transitions. Word has length 674 [2020-08-22 23:10:20,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:10:20,898 INFO L479 AbstractCegarLoop]: Abstraction has 624 states and 646 transitions. [2020-08-22 23:10:20,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 23:10:20,899 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 646 transitions. [2020-08-22 23:10:20,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 695 [2020-08-22 23:10:20,904 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:10:20,905 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:10:20,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-08-22 23:10:20,905 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:10:20,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:10:20,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1594942809, now seen corresponding path program 63 times [2020-08-22 23:10:20,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:10:20,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933475218] [2020-08-22 23:10:20,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:10:21,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:10:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 270 [2020-08-22 23:10:34,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 280 [2020-08-22 23:10:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 290 [2020-08-22 23:10:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-22 23:10:34,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-22 23:10:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-08-22 23:10:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-08-22 23:10:34,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-08-22 23:10:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-08-22 23:10:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-22 23:10:34,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2020-08-22 23:10:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-08-22 23:10:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 390 [2020-08-22 23:10:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2020-08-22 23:10:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-08-22 23:10:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2020-08-22 23:10:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 430 [2020-08-22 23:10:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-08-22 23:10:34,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 450 [2020-08-22 23:10:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 460 [2020-08-22 23:10:34,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-22 23:10:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 480 [2020-08-22 23:10:34,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-22 23:10:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 500 [2020-08-22 23:10:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 510 [2020-08-22 23:10:34,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-08-22 23:10:34,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 530 [2020-08-22 23:10:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 540 [2020-08-22 23:10:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-22 23:10:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 560 [2020-08-22 23:10:34,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 570 [2020-08-22 23:10:34,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 580 [2020-08-22 23:10:34,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 590 [2020-08-22 23:10:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 600 [2020-08-22 23:10:34,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 610 [2020-08-22 23:10:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 620 [2020-08-22 23:10:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 630 [2020-08-22 23:10:34,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 640 [2020-08-22 23:10:34,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 650 [2020-08-22 23:10:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-08-22 23:10:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2020-08-22 23:10:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 680 [2020-08-22 23:10:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:10:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 13780 backedges. 5334 proven. 5002 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2020-08-22 23:10:34,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933475218] [2020-08-22 23:10:34,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:10:34,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-08-22 23:10:34,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794359849] [2020-08-22 23:10:34,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-08-22 23:10:34,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:10:34,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-08-22 23:10:34,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2020-08-22 23:10:34,840 INFO L87 Difference]: Start difference. First operand 624 states and 646 transitions. Second operand 88 states. [2020-08-22 23:11:02,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:11:02,601 INFO L93 Difference]: Finished difference Result 1236 states and 1384 transitions. [2020-08-22 23:11:02,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2020-08-22 23:11:02,606 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 694 [2020-08-22 23:11:02,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:11:02,612 INFO L225 Difference]: With dead ends: 1236 [2020-08-22 23:11:02,613 INFO L226 Difference]: Without dead ends: 969 [2020-08-22 23:11:02,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3568 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=9245, Invalid=20167, Unknown=0, NotChecked=0, Total=29412 [2020-08-22 23:11:02,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2020-08-22 23:11:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 630. [2020-08-22 23:11:02,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 630 states. [2020-08-22 23:11:02,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 652 transitions. [2020-08-22 23:11:02,711 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 652 transitions. Word has length 694 [2020-08-22 23:11:02,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:11:02,711 INFO L479 AbstractCegarLoop]: Abstraction has 630 states and 652 transitions. [2020-08-22 23:11:02,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-08-22 23:11:02,712 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 652 transitions. [2020-08-22 23:11:02,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 701 [2020-08-22 23:11:02,717 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:11:02,718 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:11:02,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-08-22 23:11:02,718 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:11:02,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:11:02,719 INFO L82 PathProgramCache]: Analyzing trace with hash -495031121, now seen corresponding path program 64 times [2020-08-22 23:11:02,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:11:02,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099053770] [2020-08-22 23:11:02,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:11:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:11:17,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 276 [2020-08-22 23:11:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 286 [2020-08-22 23:11:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 296 [2020-08-22 23:11:17,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-08-22 23:11:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-08-22 23:11:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-08-22 23:11:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-08-22 23:11:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-08-22 23:11:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-08-22 23:11:17,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-08-22 23:11:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-08-22 23:11:17,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-08-22 23:11:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2020-08-22 23:11:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2020-08-22 23:11:17,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 416 [2020-08-22 23:11:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 426 [2020-08-22 23:11:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 436 [2020-08-22 23:11:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 446 [2020-08-22 23:11:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 456 [2020-08-22 23:11:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 466 [2020-08-22 23:11:17,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 476 [2020-08-22 23:11:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2020-08-22 23:11:17,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 496 [2020-08-22 23:11:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 506 [2020-08-22 23:11:17,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 516 [2020-08-22 23:11:17,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 526 [2020-08-22 23:11:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 536 [2020-08-22 23:11:17,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-08-22 23:11:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 556 [2020-08-22 23:11:17,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 566 [2020-08-22 23:11:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-22 23:11:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 586 [2020-08-22 23:11:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 596 [2020-08-22 23:11:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 606 [2020-08-22 23:11:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 616 [2020-08-22 23:11:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 626 [2020-08-22 23:11:17,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 636 [2020-08-22 23:11:17,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 646 [2020-08-22 23:11:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 656 [2020-08-22 23:11:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 666 [2020-08-22 23:11:17,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 676 [2020-08-22 23:11:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-08-22 23:11:17,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 14028 backedges. 5334 proven. 5250 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2020-08-22 23:11:17,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099053770] [2020-08-22 23:11:17,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:11:17,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-08-22 23:11:17,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614211051] [2020-08-22 23:11:17,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-08-22 23:11:17,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:11:17,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-08-22 23:11:17,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1981, Invalid=5851, Unknown=0, NotChecked=0, Total=7832 [2020-08-22 23:11:17,523 INFO L87 Difference]: Start difference. First operand 630 states and 652 transitions. Second operand 89 states. [2020-08-22 23:11:47,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:11:47,992 INFO L93 Difference]: Finished difference Result 1250 states and 1401 transitions. [2020-08-22 23:11:47,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2020-08-22 23:11:47,992 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 700 [2020-08-22 23:11:47,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:11:47,999 INFO L225 Difference]: With dead ends: 1250 [2020-08-22 23:11:47,999 INFO L226 Difference]: Without dead ends: 983 [2020-08-22 23:11:48,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3612 ImplicationChecksByTransitivity, 31.9s TimeCoverageRelationStatistics Valid=9635, Invalid=20815, Unknown=0, NotChecked=0, Total=30450 [2020-08-22 23:11:48,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2020-08-22 23:11:48,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 636. [2020-08-22 23:11:48,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 636 states. [2020-08-22 23:11:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 658 transitions. [2020-08-22 23:11:48,103 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 658 transitions. Word has length 700 [2020-08-22 23:11:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:11:48,103 INFO L479 AbstractCegarLoop]: Abstraction has 636 states and 658 transitions. [2020-08-22 23:11:48,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-08-22 23:11:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 658 transitions. [2020-08-22 23:11:48,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 707 [2020-08-22 23:11:48,109 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:11:48,110 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 43, 43, 43, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:11:48,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-08-22 23:11:48,110 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:11:48,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:11:48,111 INFO L82 PathProgramCache]: Analyzing trace with hash -486926153, now seen corresponding path program 65 times [2020-08-22 23:11:48,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:11:48,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398939099] [2020-08-22 23:11:48,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:11:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:11:53,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-08-22 23:11:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-08-22 23:11:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-08-22 23:11:53,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-08-22 23:11:53,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-08-22 23:11:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-08-22 23:11:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-08-22 23:11:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-08-22 23:11:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-08-22 23:11:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-08-22 23:11:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 23:11:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2020-08-22 23:11:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2020-08-22 23:11:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-22 23:11:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 422 [2020-08-22 23:11:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2020-08-22 23:11:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2020-08-22 23:11:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2020-08-22 23:11:53,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-08-22 23:11:53,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 472 [2020-08-22 23:11:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2020-08-22 23:11:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 492 [2020-08-22 23:11:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 502 [2020-08-22 23:11:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 512 [2020-08-22 23:11:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 522 [2020-08-22 23:11:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2020-08-22 23:11:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 542 [2020-08-22 23:11:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 552 [2020-08-22 23:11:53,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 562 [2020-08-22 23:11:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 572 [2020-08-22 23:11:53,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 582 [2020-08-22 23:11:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 592 [2020-08-22 23:11:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 602 [2020-08-22 23:11:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 612 [2020-08-22 23:11:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 622 [2020-08-22 23:11:53,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 632 [2020-08-22 23:11:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:53,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 642 [2020-08-22 23:11:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:54,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 652 [2020-08-22 23:11:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:54,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 662 [2020-08-22 23:11:54,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:54,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 672 [2020-08-22 23:11:54,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:54,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-08-22 23:11:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:54,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 692 [2020-08-22 23:11:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:11:54,313 INFO L134 CoverageAnalysis]: Checked inductivity of 14282 backedges. 5588 proven. 5250 refuted. 0 times theorem prover too weak. 3444 trivial. 0 not checked. [2020-08-22 23:11:54,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398939099] [2020-08-22 23:11:54,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:11:54,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-08-22 23:11:54,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715381906] [2020-08-22 23:11:54,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 23:11:54,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:11:54,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 23:11:54,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 23:11:54,318 INFO L87 Difference]: Start difference. First operand 636 states and 658 transitions. Second operand 48 states. [2020-08-22 23:11:56,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:11:56,813 INFO L93 Difference]: Finished difference Result 659 states and 682 transitions. [2020-08-22 23:11:56,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-22 23:11:56,818 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 706 [2020-08-22 23:11:56,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:11:56,824 INFO L225 Difference]: With dead ends: 659 [2020-08-22 23:11:56,825 INFO L226 Difference]: Without dead ends: 657 [2020-08-22 23:11:56,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 23:11:56,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2020-08-22 23:11:56,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 652. [2020-08-22 23:11:56,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 652 states. [2020-08-22 23:11:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 675 transitions. [2020-08-22 23:11:56,947 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 675 transitions. Word has length 706 [2020-08-22 23:11:56,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:11:56,948 INFO L479 AbstractCegarLoop]: Abstraction has 652 states and 675 transitions. [2020-08-22 23:11:56,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 23:11:56,948 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 675 transitions. [2020-08-22 23:11:56,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 727 [2020-08-22 23:11:56,954 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:11:56,955 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 44, 44, 44, 44, 44, 44, 44, 44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:11:56,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-08-22 23:11:56,955 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:11:56,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:11:56,955 INFO L82 PathProgramCache]: Analyzing trace with hash 182307539, now seen corresponding path program 66 times [2020-08-22 23:11:56,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:11:56,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021789177] [2020-08-22 23:11:56,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:11:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:12:13,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 282 [2020-08-22 23:12:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 292 [2020-08-22 23:12:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 302 [2020-08-22 23:12:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-08-22 23:12:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-08-22 23:12:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-08-22 23:12:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-08-22 23:12:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-08-22 23:12:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-08-22 23:12:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-08-22 23:12:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 23:12:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2020-08-22 23:12:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2020-08-22 23:12:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-22 23:12:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 422 [2020-08-22 23:12:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2020-08-22 23:12:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2020-08-22 23:12:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2020-08-22 23:12:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-08-22 23:12:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 472 [2020-08-22 23:12:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2020-08-22 23:12:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 492 [2020-08-22 23:12:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 502 [2020-08-22 23:12:13,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 512 [2020-08-22 23:12:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 522 [2020-08-22 23:12:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2020-08-22 23:12:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 542 [2020-08-22 23:12:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 552 [2020-08-22 23:12:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 562 [2020-08-22 23:12:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 572 [2020-08-22 23:12:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 582 [2020-08-22 23:12:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 592 [2020-08-22 23:12:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 602 [2020-08-22 23:12:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 612 [2020-08-22 23:12:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 622 [2020-08-22 23:12:13,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 632 [2020-08-22 23:12:13,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 642 [2020-08-22 23:12:13,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 652 [2020-08-22 23:12:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 662 [2020-08-22 23:12:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 672 [2020-08-22 23:12:13,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-08-22 23:12:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 692 [2020-08-22 23:12:13,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 702 [2020-08-22 23:12:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:13,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 712 [2020-08-22 23:12:13,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:12:14,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15140 backedges. 5852 proven. 5504 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2020-08-22 23:12:14,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021789177] [2020-08-22 23:12:14,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:12:14,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-08-22 23:12:14,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679316619] [2020-08-22 23:12:14,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-08-22 23:12:14,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:12:14,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-08-22 23:12:14,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2020-08-22 23:12:14,306 INFO L87 Difference]: Start difference. First operand 652 states and 675 transitions. Second operand 92 states. [2020-08-22 23:12:49,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:12:49,055 INFO L93 Difference]: Finished difference Result 1292 states and 1447 transitions. [2020-08-22 23:12:49,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-08-22 23:12:49,063 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 726 [2020-08-22 23:12:49,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:12:49,078 INFO L225 Difference]: With dead ends: 1292 [2020-08-22 23:12:49,078 INFO L226 Difference]: Without dead ends: 1013 [2020-08-22 23:12:49,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3914 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=10125, Invalid=22095, Unknown=0, NotChecked=0, Total=32220 [2020-08-22 23:12:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-08-22 23:12:49,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 658. [2020-08-22 23:12:49,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 658 states. [2020-08-22 23:12:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 681 transitions. [2020-08-22 23:12:49,353 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 681 transitions. Word has length 726 [2020-08-22 23:12:49,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:12:49,354 INFO L479 AbstractCegarLoop]: Abstraction has 658 states and 681 transitions. [2020-08-22 23:12:49,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-08-22 23:12:49,354 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 681 transitions. [2020-08-22 23:12:49,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 733 [2020-08-22 23:12:49,360 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:12:49,361 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:12:49,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-08-22 23:12:49,361 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:12:49,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:12:49,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1499659483, now seen corresponding path program 67 times [2020-08-22 23:12:49,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:12:49,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352147355] [2020-08-22 23:12:49,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:12:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:13:06,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 288 [2020-08-22 23:13:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 298 [2020-08-22 23:13:06,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 308 [2020-08-22 23:13:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-08-22 23:13:06,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-22 23:13:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-08-22 23:13:06,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-08-22 23:13:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-08-22 23:13:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-08-22 23:13:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-08-22 23:13:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-08-22 23:13:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-08-22 23:13:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-08-22 23:13:06,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-08-22 23:13:06,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-08-22 23:13:06,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2020-08-22 23:13:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-08-22 23:13:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-08-22 23:13:06,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2020-08-22 23:13:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 478 [2020-08-22 23:13:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 488 [2020-08-22 23:13:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 498 [2020-08-22 23:13:06,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 508 [2020-08-22 23:13:06,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 518 [2020-08-22 23:13:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 528 [2020-08-22 23:13:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 538 [2020-08-22 23:13:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 548 [2020-08-22 23:13:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-22 23:13:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 568 [2020-08-22 23:13:06,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 578 [2020-08-22 23:13:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 588 [2020-08-22 23:13:06,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 598 [2020-08-22 23:13:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 608 [2020-08-22 23:13:06,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 618 [2020-08-22 23:13:06,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 628 [2020-08-22 23:13:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 638 [2020-08-22 23:13:06,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 648 [2020-08-22 23:13:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 658 [2020-08-22 23:13:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 668 [2020-08-22 23:13:06,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 678 [2020-08-22 23:13:06,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-22 23:13:06,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 698 [2020-08-22 23:13:06,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 708 [2020-08-22 23:13:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 718 [2020-08-22 23:13:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 15400 backedges. 5852 proven. 5764 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2020-08-22 23:13:06,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352147355] [2020-08-22 23:13:06,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:13:06,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-08-22 23:13:06,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527618463] [2020-08-22 23:13:06,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-08-22 23:13:06,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:13:06,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-08-22 23:13:06,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2163, Invalid=6393, Unknown=0, NotChecked=0, Total=8556 [2020-08-22 23:13:06,562 INFO L87 Difference]: Start difference. First operand 658 states and 681 transitions. Second operand 93 states. [2020-08-22 23:13:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:13:34,782 INFO L93 Difference]: Finished difference Result 1306 states and 1464 transitions. [2020-08-22 23:13:34,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2020-08-22 23:13:34,782 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 732 [2020-08-22 23:13:34,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:13:34,785 INFO L225 Difference]: With dead ends: 1306 [2020-08-22 23:13:34,785 INFO L226 Difference]: Without dead ends: 1027 [2020-08-22 23:13:34,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3960 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=10533, Invalid=22773, Unknown=0, NotChecked=0, Total=33306 [2020-08-22 23:13:34,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2020-08-22 23:13:34,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 664. [2020-08-22 23:13:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 664 states. [2020-08-22 23:13:34,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 687 transitions. [2020-08-22 23:13:34,894 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 687 transitions. Word has length 732 [2020-08-22 23:13:34,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:13:34,894 INFO L479 AbstractCegarLoop]: Abstraction has 664 states and 687 transitions. [2020-08-22 23:13:34,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-08-22 23:13:34,894 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 687 transitions. [2020-08-22 23:13:34,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 739 [2020-08-22 23:13:34,899 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:13:34,900 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 45, 45, 45, 45, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:13:34,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-08-22 23:13:34,900 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:13:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:13:34,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1897101085, now seen corresponding path program 68 times [2020-08-22 23:13:34,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:13:34,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480213577] [2020-08-22 23:13:34,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:13:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:13:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-08-22 23:13:40,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-08-22 23:13:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-22 23:13:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-08-22 23:13:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-08-22 23:13:40,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 23:13:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-08-22 23:13:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-08-22 23:13:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-08-22 23:13:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-08-22 23:13:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-08-22 23:13:40,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-08-22 23:13:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2020-08-22 23:13:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2020-08-22 23:13:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2020-08-22 23:13:40,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 444 [2020-08-22 23:13:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 454 [2020-08-22 23:13:40,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 464 [2020-08-22 23:13:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 474 [2020-08-22 23:13:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 484 [2020-08-22 23:13:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 494 [2020-08-22 23:13:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2020-08-22 23:13:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2020-08-22 23:13:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 524 [2020-08-22 23:13:40,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 534 [2020-08-22 23:13:40,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 544 [2020-08-22 23:13:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 554 [2020-08-22 23:13:40,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 564 [2020-08-22 23:13:40,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 574 [2020-08-22 23:13:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 584 [2020-08-22 23:13:40,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 594 [2020-08-22 23:13:40,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 604 [2020-08-22 23:13:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 614 [2020-08-22 23:13:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 624 [2020-08-22 23:13:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 634 [2020-08-22 23:13:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 644 [2020-08-22 23:13:40,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 654 [2020-08-22 23:13:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 664 [2020-08-22 23:13:40,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 674 [2020-08-22 23:13:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 684 [2020-08-22 23:13:40,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 694 [2020-08-22 23:13:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 704 [2020-08-22 23:13:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 714 [2020-08-22 23:13:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 724 [2020-08-22 23:13:40,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 15666 backedges. 6118 proven. 5764 refuted. 0 times theorem prover too weak. 3784 trivial. 0 not checked. [2020-08-22 23:13:40,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480213577] [2020-08-22 23:13:40,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:13:40,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-08-22 23:13:40,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176898531] [2020-08-22 23:13:40,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-22 23:13:40,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:13:40,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-22 23:13:40,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 23:13:40,543 INFO L87 Difference]: Start difference. First operand 664 states and 687 transitions. Second operand 50 states. [2020-08-22 23:13:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:13:42,887 INFO L93 Difference]: Finished difference Result 687 states and 711 transitions. [2020-08-22 23:13:42,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-22 23:13:42,892 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 738 [2020-08-22 23:13:42,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:13:42,896 INFO L225 Difference]: With dead ends: 687 [2020-08-22 23:13:42,896 INFO L226 Difference]: Without dead ends: 685 [2020-08-22 23:13:42,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 23:13:42,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2020-08-22 23:13:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 680. [2020-08-22 23:13:43,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 680 states. [2020-08-22 23:13:43,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 704 transitions. [2020-08-22 23:13:43,019 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 704 transitions. Word has length 738 [2020-08-22 23:13:43,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:13:43,019 INFO L479 AbstractCegarLoop]: Abstraction has 680 states and 704 transitions. [2020-08-22 23:13:43,019 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-22 23:13:43,020 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 704 transitions. [2020-08-22 23:13:43,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2020-08-22 23:13:43,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:13:43,025 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 46, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:13:43,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-08-22 23:13:43,026 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:13:43,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:13:43,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1602383103, now seen corresponding path program 69 times [2020-08-22 23:13:43,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:13:43,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026520409] [2020-08-22 23:13:43,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:13:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:13:59,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 294 [2020-08-22 23:13:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 304 [2020-08-22 23:13:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 314 [2020-08-22 23:13:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 324 [2020-08-22 23:13:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 334 [2020-08-22 23:13:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 344 [2020-08-22 23:13:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 354 [2020-08-22 23:13:59,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 364 [2020-08-22 23:13:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 374 [2020-08-22 23:13:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 384 [2020-08-22 23:13:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 394 [2020-08-22 23:13:59,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 404 [2020-08-22 23:13:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 414 [2020-08-22 23:13:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 424 [2020-08-22 23:13:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 434 [2020-08-22 23:13:59,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 444 [2020-08-22 23:13:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 454 [2020-08-22 23:13:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 464 [2020-08-22 23:13:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 474 [2020-08-22 23:13:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 484 [2020-08-22 23:13:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 494 [2020-08-22 23:13:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 504 [2020-08-22 23:13:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 514 [2020-08-22 23:13:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 524 [2020-08-22 23:13:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 534 [2020-08-22 23:13:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 544 [2020-08-22 23:13:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 554 [2020-08-22 23:13:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 564 [2020-08-22 23:13:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 574 [2020-08-22 23:13:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 584 [2020-08-22 23:13:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 594 [2020-08-22 23:13:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 604 [2020-08-22 23:13:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 614 [2020-08-22 23:13:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 624 [2020-08-22 23:13:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 634 [2020-08-22 23:13:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 644 [2020-08-22 23:13:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 654 [2020-08-22 23:13:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 664 [2020-08-22 23:13:59,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 674 [2020-08-22 23:13:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 684 [2020-08-22 23:13:59,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 694 [2020-08-22 23:13:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 704 [2020-08-22 23:13:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 714 [2020-08-22 23:13:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 724 [2020-08-22 23:13:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 734 [2020-08-22 23:13:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 744 [2020-08-22 23:13:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:13:59,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16564 backedges. 6394 proven. 6030 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2020-08-22 23:13:59,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026520409] [2020-08-22 23:13:59,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:13:59,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-08-22 23:13:59,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108709710] [2020-08-22 23:13:59,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-08-22 23:13:59,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:13:59,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-08-22 23:13:59,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2020-08-22 23:13:59,538 INFO L87 Difference]: Start difference. First operand 680 states and 704 transitions. Second operand 96 states. [2020-08-22 23:14:32,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:14:32,101 INFO L93 Difference]: Finished difference Result 1348 states and 1510 transitions. [2020-08-22 23:14:32,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2020-08-22 23:14:32,105 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 758 [2020-08-22 23:14:32,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:14:32,108 INFO L225 Difference]: With dead ends: 1348 [2020-08-22 23:14:32,108 INFO L226 Difference]: Without dead ends: 1057 [2020-08-22 23:14:32,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4276 ImplicationChecksByTransitivity, 34.3s TimeCoverageRelationStatistics Valid=11045, Invalid=24111, Unknown=0, NotChecked=0, Total=35156 [2020-08-22 23:14:32,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2020-08-22 23:14:32,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 686. [2020-08-22 23:14:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 686 states. [2020-08-22 23:14:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 710 transitions. [2020-08-22 23:14:32,203 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 710 transitions. Word has length 758 [2020-08-22 23:14:32,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:14:32,203 INFO L479 AbstractCegarLoop]: Abstraction has 686 states and 710 transitions. [2020-08-22 23:14:32,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-08-22 23:14:32,203 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 710 transitions. [2020-08-22 23:14:32,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2020-08-22 23:14:32,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:14:32,210 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:14:32,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-08-22 23:14:32,210 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:14:32,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:14:32,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1803386631, now seen corresponding path program 70 times [2020-08-22 23:14:32,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:14:32,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382056167] [2020-08-22 23:14:32,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:14:32,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:14:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 300 [2020-08-22 23:14:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 310 [2020-08-22 23:14:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 320 [2020-08-22 23:14:44,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 330 [2020-08-22 23:14:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 340 [2020-08-22 23:14:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 350 [2020-08-22 23:14:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 360 [2020-08-22 23:14:44,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 370 [2020-08-22 23:14:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 380 [2020-08-22 23:14:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 390 [2020-08-22 23:14:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 400 [2020-08-22 23:14:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 410 [2020-08-22 23:14:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 420 [2020-08-22 23:14:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 430 [2020-08-22 23:14:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 440 [2020-08-22 23:14:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 450 [2020-08-22 23:14:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 460 [2020-08-22 23:14:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 470 [2020-08-22 23:14:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 480 [2020-08-22 23:14:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 490 [2020-08-22 23:14:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 500 [2020-08-22 23:14:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 510 [2020-08-22 23:14:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 520 [2020-08-22 23:14:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 530 [2020-08-22 23:14:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 540 [2020-08-22 23:14:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 550 [2020-08-22 23:14:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 560 [2020-08-22 23:14:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 570 [2020-08-22 23:14:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 580 [2020-08-22 23:14:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 590 [2020-08-22 23:14:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 600 [2020-08-22 23:14:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 610 [2020-08-22 23:14:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 620 [2020-08-22 23:14:44,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 630 [2020-08-22 23:14:44,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 640 [2020-08-22 23:14:44,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 650 [2020-08-22 23:14:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 660 [2020-08-22 23:14:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 670 [2020-08-22 23:14:44,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 680 [2020-08-22 23:14:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 690 [2020-08-22 23:14:44,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 700 [2020-08-22 23:14:44,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 710 [2020-08-22 23:14:44,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 720 [2020-08-22 23:14:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 730 [2020-08-22 23:14:44,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 740 [2020-08-22 23:14:44,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:44,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 750 [2020-08-22 23:14:44,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:14:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16836 backedges. 6394 proven. 6302 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2020-08-22 23:14:45,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382056167] [2020-08-22 23:14:45,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:14:45,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2020-08-22 23:14:45,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431297291] [2020-08-22 23:14:45,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-08-22 23:14:45,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:14:45,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-08-22 23:14:45,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2353, Invalid=6959, Unknown=0, NotChecked=0, Total=9312 [2020-08-22 23:14:45,503 INFO L87 Difference]: Start difference. First operand 686 states and 710 transitions. Second operand 97 states. [2020-08-22 23:15:10,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:10,334 INFO L93 Difference]: Finished difference Result 1362 states and 1527 transitions. [2020-08-22 23:15:10,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2020-08-22 23:15:10,334 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 764 [2020-08-22 23:15:10,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:10,336 INFO L225 Difference]: With dead ends: 1362 [2020-08-22 23:15:10,336 INFO L226 Difference]: Without dead ends: 1071 [2020-08-22 23:15:10,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 27.2s TimeCoverageRelationStatistics Valid=11471, Invalid=24819, Unknown=0, NotChecked=0, Total=36290 [2020-08-22 23:15:10,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2020-08-22 23:15:10,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 692. [2020-08-22 23:15:10,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 692 states. [2020-08-22 23:15:10,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 716 transitions. [2020-08-22 23:15:10,430 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 716 transitions. Word has length 764 [2020-08-22 23:15:10,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:10,431 INFO L479 AbstractCegarLoop]: Abstraction has 692 states and 716 transitions. [2020-08-22 23:15:10,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-08-22 23:15:10,431 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 716 transitions. [2020-08-22 23:15:10,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2020-08-22 23:15:10,435 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:10,436 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 47, 47, 47, 47, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:15:10,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-08-22 23:15:10,436 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:10,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:10,436 INFO L82 PathProgramCache]: Analyzing trace with hash 647293711, now seen corresponding path program 71 times [2020-08-22 23:15:10,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:10,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604354301] [2020-08-22 23:15:10,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:10,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-08-22 23:15:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-08-22 23:15:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-08-22 23:15:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-08-22 23:15:14,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-08-22 23:15:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-08-22 23:15:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-08-22 23:15:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-08-22 23:15:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-08-22 23:15:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2020-08-22 23:15:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2020-08-22 23:15:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 416 [2020-08-22 23:15:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 426 [2020-08-22 23:15:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 436 [2020-08-22 23:15:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 446 [2020-08-22 23:15:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 456 [2020-08-22 23:15:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 466 [2020-08-22 23:15:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 476 [2020-08-22 23:15:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2020-08-22 23:15:14,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 496 [2020-08-22 23:15:14,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 506 [2020-08-22 23:15:14,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 516 [2020-08-22 23:15:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 526 [2020-08-22 23:15:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 536 [2020-08-22 23:15:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-08-22 23:15:14,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 556 [2020-08-22 23:15:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 566 [2020-08-22 23:15:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-22 23:15:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 586 [2020-08-22 23:15:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 596 [2020-08-22 23:15:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 606 [2020-08-22 23:15:14,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 616 [2020-08-22 23:15:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 626 [2020-08-22 23:15:14,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 636 [2020-08-22 23:15:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 646 [2020-08-22 23:15:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 656 [2020-08-22 23:15:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 666 [2020-08-22 23:15:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 676 [2020-08-22 23:15:14,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-08-22 23:15:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 696 [2020-08-22 23:15:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 706 [2020-08-22 23:15:14,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 716 [2020-08-22 23:15:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 726 [2020-08-22 23:15:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 736 [2020-08-22 23:15:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 746 [2020-08-22 23:15:14,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2020-08-22 23:15:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:14,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17114 backedges. 6672 proven. 6302 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2020-08-22 23:15:14,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604354301] [2020-08-22 23:15:14,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:14,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-08-22 23:15:14,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788172079] [2020-08-22 23:15:14,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-22 23:15:14,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:14,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-22 23:15:14,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1229, Invalid=1423, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 23:15:14,875 INFO L87 Difference]: Start difference. First operand 692 states and 716 transitions. Second operand 52 states. [2020-08-22 23:15:16,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:16,752 INFO L93 Difference]: Finished difference Result 715 states and 740 transitions. [2020-08-22 23:15:16,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-22 23:15:16,755 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 770 [2020-08-22 23:15:16,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:16,757 INFO L225 Difference]: With dead ends: 715 [2020-08-22 23:15:16,758 INFO L226 Difference]: Without dead ends: 713 [2020-08-22 23:15:16,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1233, Invalid=1523, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 23:15:16,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2020-08-22 23:15:16,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 708. [2020-08-22 23:15:16,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 708 states. [2020-08-22 23:15:16,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 733 transitions. [2020-08-22 23:15:16,851 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 733 transitions. Word has length 770 [2020-08-22 23:15:16,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:16,851 INFO L479 AbstractCegarLoop]: Abstraction has 708 states and 733 transitions. [2020-08-22 23:15:16,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-22 23:15:16,852 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 733 transitions. [2020-08-22 23:15:16,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 791 [2020-08-22 23:15:16,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:16,857 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 48, 48, 48, 48, 48, 48, 48, 48, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:15:16,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-08-22 23:15:16,857 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:16,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:16,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1265631531, now seen corresponding path program 72 times [2020-08-22 23:15:16,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:16,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396030414] [2020-08-22 23:15:16,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:15:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 306 [2020-08-22 23:15:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 316 [2020-08-22 23:15:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 326 [2020-08-22 23:15:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 336 [2020-08-22 23:15:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 346 [2020-08-22 23:15:28,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 356 [2020-08-22 23:15:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 366 [2020-08-22 23:15:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 376 [2020-08-22 23:15:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 386 [2020-08-22 23:15:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 396 [2020-08-22 23:15:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 406 [2020-08-22 23:15:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 416 [2020-08-22 23:15:28,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 426 [2020-08-22 23:15:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 436 [2020-08-22 23:15:28,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 446 [2020-08-22 23:15:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 456 [2020-08-22 23:15:28,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 466 [2020-08-22 23:15:28,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 476 [2020-08-22 23:15:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 486 [2020-08-22 23:15:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 496 [2020-08-22 23:15:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 506 [2020-08-22 23:15:28,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 516 [2020-08-22 23:15:28,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 526 [2020-08-22 23:15:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 536 [2020-08-22 23:15:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 546 [2020-08-22 23:15:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 556 [2020-08-22 23:15:28,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 566 [2020-08-22 23:15:28,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 576 [2020-08-22 23:15:28,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 586 [2020-08-22 23:15:28,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 596 [2020-08-22 23:15:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 606 [2020-08-22 23:15:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 616 [2020-08-22 23:15:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 626 [2020-08-22 23:15:28,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 636 [2020-08-22 23:15:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 646 [2020-08-22 23:15:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 656 [2020-08-22 23:15:28,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 666 [2020-08-22 23:15:28,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 676 [2020-08-22 23:15:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 686 [2020-08-22 23:15:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 696 [2020-08-22 23:15:28,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 706 [2020-08-22 23:15:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 716 [2020-08-22 23:15:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 726 [2020-08-22 23:15:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 736 [2020-08-22 23:15:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 746 [2020-08-22 23:15:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 756 [2020-08-22 23:15:28,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 766 [2020-08-22 23:15:28,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:28,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 776 [2020-08-22 23:15:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:15:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 18052 backedges. 6960 proven. 6580 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2020-08-22 23:15:29,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396030414] [2020-08-22 23:15:29,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:15:29,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2020-08-22 23:15:29,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754539281] [2020-08-22 23:15:29,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-08-22 23:15:29,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:15:29,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-08-22 23:15:29,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2501, Invalid=7399, Unknown=0, NotChecked=0, Total=9900 [2020-08-22 23:15:29,057 INFO L87 Difference]: Start difference. First operand 708 states and 733 transitions. Second operand 100 states. [2020-08-22 23:15:58,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:15:58,216 INFO L93 Difference]: Finished difference Result 1404 states and 1573 transitions. [2020-08-22 23:15:58,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2020-08-22 23:15:58,221 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 790 [2020-08-22 23:15:58,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:15:58,226 INFO L225 Difference]: With dead ends: 1404 [2020-08-22 23:15:58,226 INFO L226 Difference]: Without dead ends: 1101 [2020-08-22 23:15:58,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4654 ImplicationChecksByTransitivity, 28.4s TimeCoverageRelationStatistics Valid=12005, Invalid=26215, Unknown=0, NotChecked=0, Total=38220 [2020-08-22 23:15:58,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2020-08-22 23:15:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 714. [2020-08-22 23:15:58,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 714 states. [2020-08-22 23:15:58,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 739 transitions. [2020-08-22 23:15:58,345 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 739 transitions. Word has length 790 [2020-08-22 23:15:58,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:15:58,345 INFO L479 AbstractCegarLoop]: Abstraction has 714 states and 739 transitions. [2020-08-22 23:15:58,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-08-22 23:15:58,345 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 739 transitions. [2020-08-22 23:15:58,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 797 [2020-08-22 23:15:58,351 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:15:58,352 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:15:58,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-08-22 23:15:58,352 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:15:58,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:15:58,352 INFO L82 PathProgramCache]: Analyzing trace with hash -983502029, now seen corresponding path program 73 times [2020-08-22 23:15:58,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:15:58,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76630523] [2020-08-22 23:15:58,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:15:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:16:13,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 312 [2020-08-22 23:16:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 322 [2020-08-22 23:16:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 332 [2020-08-22 23:16:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 342 [2020-08-22 23:16:13,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 352 [2020-08-22 23:16:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 362 [2020-08-22 23:16:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 372 [2020-08-22 23:16:13,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 382 [2020-08-22 23:16:13,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 392 [2020-08-22 23:16:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 402 [2020-08-22 23:16:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 412 [2020-08-22 23:16:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 422 [2020-08-22 23:16:13,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 432 [2020-08-22 23:16:13,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 442 [2020-08-22 23:16:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 452 [2020-08-22 23:16:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 462 [2020-08-22 23:16:13,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 472 [2020-08-22 23:16:13,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 482 [2020-08-22 23:16:13,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 492 [2020-08-22 23:16:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 502 [2020-08-22 23:16:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 512 [2020-08-22 23:16:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 522 [2020-08-22 23:16:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 532 [2020-08-22 23:16:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 542 [2020-08-22 23:16:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 552 [2020-08-22 23:16:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 562 [2020-08-22 23:16:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 572 [2020-08-22 23:16:13,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 582 [2020-08-22 23:16:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 592 [2020-08-22 23:16:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 602 [2020-08-22 23:16:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 612 [2020-08-22 23:16:13,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 622 [2020-08-22 23:16:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 632 [2020-08-22 23:16:13,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 642 [2020-08-22 23:16:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 652 [2020-08-22 23:16:13,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 662 [2020-08-22 23:16:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 672 [2020-08-22 23:16:13,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 682 [2020-08-22 23:16:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 692 [2020-08-22 23:16:13,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 702 [2020-08-22 23:16:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 712 [2020-08-22 23:16:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 722 [2020-08-22 23:16:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 732 [2020-08-22 23:16:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 742 [2020-08-22 23:16:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 752 [2020-08-22 23:16:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 762 [2020-08-22 23:16:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 772 [2020-08-22 23:16:13,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 782 [2020-08-22 23:16:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 18336 backedges. 6960 proven. 6864 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2020-08-22 23:16:13,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76630523] [2020-08-22 23:16:13,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:16:13,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2020-08-22 23:16:13,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003409924] [2020-08-22 23:16:13,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-08-22 23:16:13,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:16:13,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-08-22 23:16:13,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2551, Invalid=7549, Unknown=0, NotChecked=0, Total=10100 [2020-08-22 23:16:13,984 INFO L87 Difference]: Start difference. First operand 714 states and 739 transitions. Second operand 101 states. [2020-08-22 23:16:44,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:16:44,627 INFO L93 Difference]: Finished difference Result 1418 states and 1590 transitions. [2020-08-22 23:16:44,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2020-08-22 23:16:44,627 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 796 [2020-08-22 23:16:44,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:16:44,630 INFO L225 Difference]: With dead ends: 1418 [2020-08-22 23:16:44,630 INFO L226 Difference]: Without dead ends: 1115 [2020-08-22 23:16:44,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4704 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=12449, Invalid=26953, Unknown=0, NotChecked=0, Total=39402 [2020-08-22 23:16:44,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2020-08-22 23:16:44,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 720. [2020-08-22 23:16:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2020-08-22 23:16:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 745 transitions. [2020-08-22 23:16:44,794 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 745 transitions. Word has length 796 [2020-08-22 23:16:44,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:16:44,794 INFO L479 AbstractCegarLoop]: Abstraction has 720 states and 745 transitions. [2020-08-22 23:16:44,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-08-22 23:16:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 745 transitions. [2020-08-22 23:16:44,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 803 [2020-08-22 23:16:44,803 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:16:44,803 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 49, 49, 49, 49, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:16:44,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-08-22 23:16:44,804 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:16:44,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:16:44,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1451638587, now seen corresponding path program 74 times [2020-08-22 23:16:44,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:16:44,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628763079] [2020-08-22 23:16:44,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:16:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:16:50,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-08-22 23:16:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-22 23:16:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-08-22 23:16:50,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-08-22 23:16:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-08-22 23:16:50,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-08-22 23:16:50,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-08-22 23:16:50,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-08-22 23:16:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-08-22 23:16:50,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-08-22 23:16:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-08-22 23:16:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-08-22 23:16:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2020-08-22 23:16:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-08-22 23:16:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-08-22 23:16:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2020-08-22 23:16:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 478 [2020-08-22 23:16:50,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 488 [2020-08-22 23:16:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 498 [2020-08-22 23:16:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 508 [2020-08-22 23:16:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 518 [2020-08-22 23:16:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 528 [2020-08-22 23:16:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 538 [2020-08-22 23:16:50,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 548 [2020-08-22 23:16:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-22 23:16:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 568 [2020-08-22 23:16:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 578 [2020-08-22 23:16:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 588 [2020-08-22 23:16:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 598 [2020-08-22 23:16:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 608 [2020-08-22 23:16:50,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 618 [2020-08-22 23:16:50,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 628 [2020-08-22 23:16:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 638 [2020-08-22 23:16:50,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 648 [2020-08-22 23:16:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 658 [2020-08-22 23:16:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 668 [2020-08-22 23:16:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 678 [2020-08-22 23:16:50,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-22 23:16:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 698 [2020-08-22 23:16:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 708 [2020-08-22 23:16:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 718 [2020-08-22 23:16:50,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 728 [2020-08-22 23:16:50,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 738 [2020-08-22 23:16:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 748 [2020-08-22 23:16:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 758 [2020-08-22 23:16:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 768 [2020-08-22 23:16:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 778 [2020-08-22 23:16:50,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 788 [2020-08-22 23:16:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:16:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 18626 backedges. 7250 proven. 6864 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2020-08-22 23:16:50,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628763079] [2020-08-22 23:16:50,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:16:50,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-08-22 23:16:50,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346632347] [2020-08-22 23:16:50,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-08-22 23:16:50,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:16:50,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-08-22 23:16:50,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1330, Invalid=1532, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 23:16:50,774 INFO L87 Difference]: Start difference. First operand 720 states and 745 transitions. Second operand 54 states. [2020-08-22 23:16:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:16:52,941 INFO L93 Difference]: Finished difference Result 743 states and 769 transitions. [2020-08-22 23:16:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 23:16:52,946 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 802 [2020-08-22 23:16:52,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:16:52,949 INFO L225 Difference]: With dead ends: 743 [2020-08-22 23:16:52,949 INFO L226 Difference]: Without dead ends: 741 [2020-08-22 23:16:52,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1334, Invalid=1636, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 23:16:52,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-08-22 23:16:53,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 736. [2020-08-22 23:16:53,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 736 states. [2020-08-22 23:16:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 762 transitions. [2020-08-22 23:16:53,157 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 762 transitions. Word has length 802 [2020-08-22 23:16:53,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:16:53,158 INFO L479 AbstractCegarLoop]: Abstraction has 736 states and 762 transitions. [2020-08-22 23:16:53,159 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-08-22 23:16:53,159 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 762 transitions. [2020-08-22 23:16:53,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2020-08-22 23:16:53,170 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:16:53,171 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 50, 50, 50, 50, 50, 50, 50, 50, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:16:53,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-08-22 23:16:53,171 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:16:53,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:16:53,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1941538647, now seen corresponding path program 75 times [2020-08-22 23:16:53,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:16:53,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392060057] [2020-08-22 23:16:53,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:16:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:17:08,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 318 [2020-08-22 23:17:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 328 [2020-08-22 23:17:08,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 338 [2020-08-22 23:17:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 348 [2020-08-22 23:17:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 358 [2020-08-22 23:17:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 368 [2020-08-22 23:17:08,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 378 [2020-08-22 23:17:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 388 [2020-08-22 23:17:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 398 [2020-08-22 23:17:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 408 [2020-08-22 23:17:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 418 [2020-08-22 23:17:08,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 428 [2020-08-22 23:17:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 438 [2020-08-22 23:17:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 448 [2020-08-22 23:17:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 458 [2020-08-22 23:17:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 468 [2020-08-22 23:17:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 478 [2020-08-22 23:17:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 488 [2020-08-22 23:17:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 498 [2020-08-22 23:17:08,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 508 [2020-08-22 23:17:08,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 518 [2020-08-22 23:17:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 528 [2020-08-22 23:17:08,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 538 [2020-08-22 23:17:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 548 [2020-08-22 23:17:08,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 558 [2020-08-22 23:17:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 568 [2020-08-22 23:17:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 578 [2020-08-22 23:17:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 588 [2020-08-22 23:17:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 598 [2020-08-22 23:17:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 608 [2020-08-22 23:17:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 618 [2020-08-22 23:17:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 628 [2020-08-22 23:17:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 638 [2020-08-22 23:17:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 648 [2020-08-22 23:17:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 658 [2020-08-22 23:17:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 668 [2020-08-22 23:17:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 678 [2020-08-22 23:17:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 688 [2020-08-22 23:17:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 698 [2020-08-22 23:17:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 708 [2020-08-22 23:17:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 718 [2020-08-22 23:17:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 728 [2020-08-22 23:17:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 738 [2020-08-22 23:17:08,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 748 [2020-08-22 23:17:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 758 [2020-08-22 23:17:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 768 [2020-08-22 23:17:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 778 [2020-08-22 23:17:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 788 [2020-08-22 23:17:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 798 [2020-08-22 23:17:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:08,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 808 [2020-08-22 23:17:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:17:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 19604 backedges. 7550 proven. 7154 refuted. 0 times theorem prover too weak. 4900 trivial. 0 not checked. [2020-08-22 23:17:09,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392060057] [2020-08-22 23:17:09,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:17:09,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104] total 104 [2020-08-22 23:17:09,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929531255] [2020-08-22 23:17:09,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 104 states [2020-08-22 23:17:09,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:17:09,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2020-08-22 23:17:09,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2705, Invalid=8007, Unknown=0, NotChecked=0, Total=10712 [2020-08-22 23:17:09,121 INFO L87 Difference]: Start difference. First operand 736 states and 762 transitions. Second operand 104 states. [2020-08-22 23:17:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:17:39,917 INFO L93 Difference]: Finished difference Result 1460 states and 1636 transitions. [2020-08-22 23:17:39,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2020-08-22 23:17:39,922 INFO L78 Accepts]: Start accepts. Automaton has 104 states. Word has length 822 [2020-08-22 23:17:39,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:17:39,927 INFO L225 Difference]: With dead ends: 1460 [2020-08-22 23:17:39,927 INFO L226 Difference]: Without dead ends: 1145 [2020-08-22 23:17:39,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5048 ImplicationChecksByTransitivity, 33.4s TimeCoverageRelationStatistics Valid=13005, Invalid=28407, Unknown=0, NotChecked=0, Total=41412 [2020-08-22 23:17:39,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2020-08-22 23:17:40,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 742. [2020-08-22 23:17:40,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 742 states. [2020-08-22 23:17:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 768 transitions. [2020-08-22 23:17:40,112 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 768 transitions. Word has length 822 [2020-08-22 23:17:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:17:40,112 INFO L479 AbstractCegarLoop]: Abstraction has 742 states and 768 transitions. [2020-08-22 23:17:40,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 104 states. [2020-08-22 23:17:40,112 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 768 transitions. [2020-08-22 23:17:40,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 829 [2020-08-22 23:17:40,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:17:40,122 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:17:40,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-08-22 23:17:40,122 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:17:40,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:17:40,123 INFO L82 PathProgramCache]: Analyzing trace with hash 203446623, now seen corresponding path program 76 times [2020-08-22 23:17:40,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:17:40,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924326562] [2020-08-22 23:17:40,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:17:40,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat