/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/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 21:38:46,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 21:38:46,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 21:38:46,933 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 21:38:46,933 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 21:38:46,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 21:38:46,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 21:38:46,938 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 21:38:46,939 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 21:38:46,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 21:38:46,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 21:38:46,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 21:38:46,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 21:38:46,944 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 21:38:46,945 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 21:38:46,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 21:38:46,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 21:38:46,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 21:38:46,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 21:38:46,952 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 21:38:46,954 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 21:38:46,955 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 21:38:46,956 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 21:38:46,957 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 21:38:46,960 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 21:38:46,968 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 21:38:46,969 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 21:38:46,970 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 21:38:46,971 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 21:38:46,982 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 21:38:46,983 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 21:38:46,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 21:38:46,984 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 21:38:46,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 21:38:46,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 21:38:46,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 21:38:46,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 21:38:46,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 21:38:46,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 21:38:46,985 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 21:38:46,986 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 21:38:46,986 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 21:38:46,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 21:38:46,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 21:38:46,987 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 21:38:46,987 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 21:38:46,987 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 21:38:46,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 21:38:46,987 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 21:38:46,988 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 21:38:46,988 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 21:38:46,988 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-09-04 21:38:47,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 21:38:47,479 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 21:38:47,484 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 21:38:47,486 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 21:38:47,486 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 21:38:47,488 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-09-04 21:38:47,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38de0ab04/df13d6ec921648a592607f6b0d179a14/FLAG649efe106 [2020-09-04 21:38:48,129 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 21:38:48,130 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-09-04 21:38:48,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38de0ab04/df13d6ec921648a592607f6b0d179a14/FLAG649efe106 [2020-09-04 21:38:48,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/38de0ab04/df13d6ec921648a592607f6b0d179a14 [2020-09-04 21:38:48,509 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 21:38:48,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 21:38:48,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 21:38:48,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 21:38:48,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 21:38:48,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:38:48" (1/1) ... [2020-09-04 21:38:48,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5035f6b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:38:48, skipping insertion in model container [2020-09-04 21:38:48,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:38:48" (1/1) ... [2020-09-04 21:38:48,534 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 21:38:48,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 21:38:48,767 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:38:48,773 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 21:38:48,794 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:38:48,812 INFO L208 MainTranslator]: Completed translation [2020-09-04 21:38:48,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:38:48 WrapperNode [2020-09-04 21:38:48,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 21:38:48,814 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 21:38:48,814 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 21:38:48,814 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 21:38:48,831 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:38:48" (1/1) ... [2020-09-04 21:38:48,831 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:38:48" (1/1) ... [2020-09-04 21:38:48,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:38:48" (1/1) ... [2020-09-04 21:38:48,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:38:48" (1/1) ... [2020-09-04 21:38:48,914 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:38:48" (1/1) ... [2020-09-04 21:38:48,916 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:38:48" (1/1) ... [2020-09-04 21:38:48,917 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:38:48" (1/1) ... [2020-09-04 21:38:48,919 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 21:38:48,919 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 21:38:48,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 21:38:48,920 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 21:38:48,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:38:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 21:38:48,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 21:38:48,998 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 21:38:48,999 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-09-04 21:38:48,999 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 21:38:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 21:38:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 21:38:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-09-04 21:38:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 21:38:48,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 21:38:49,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 21:38:49,251 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 21:38:49,252 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 21:38:49,257 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:38:49 BoogieIcfgContainer [2020-09-04 21:38:49,258 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 21:38:49,259 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 21:38:49,259 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 21:38:49,263 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 21:38:49,263 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 09:38:48" (1/3) ... [2020-09-04 21:38:49,264 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409a88ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:38:49, skipping insertion in model container [2020-09-04 21:38:49,264 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:38:48" (2/3) ... [2020-09-04 21:38:49,265 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@409a88ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:38:49, skipping insertion in model container [2020-09-04 21:38:49,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:38:49" (3/3) ... [2020-09-04 21:38:49,268 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-09-04 21:38:49,282 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 21:38:49,292 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 21:38:49,316 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 21:38:49,350 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 21:38:49,351 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 21:38:49,351 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 21:38:49,351 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 21:38:49,351 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 21:38:49,352 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 21:38:49,352 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 21:38:49,352 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 21:38:49,377 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-09-04 21:38:49,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-04 21:38:49,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:38:49,392 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:38:49,392 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:38:49,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:38:49,400 INFO L82 PathProgramCache]: Analyzing trace with hash 2060884630, now seen corresponding path program 1 times [2020-09-04 21:38:49,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:38:49,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [589255313] [2020-09-04 21:38:49,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:38:49,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:49,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:38:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:49,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:38:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:49,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 21:38:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 21:38:49,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [589255313] [2020-09-04 21:38:49,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:38:49,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-04 21:38:49,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535537556] [2020-09-04 21:38:49,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 21:38:49,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:38:49,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 21:38:49,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 21:38:49,745 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-09-04 21:38:49,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:38:49,961 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-09-04 21:38:49,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 21:38:49,964 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-09-04 21:38:49,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:38:49,983 INFO L225 Difference]: With dead ends: 64 [2020-09-04 21:38:49,983 INFO L226 Difference]: Without dead ends: 40 [2020-09-04 21:38:49,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 21:38:50,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-04 21:38:50,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-04 21:38:50,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-04 21:38:50,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-09-04 21:38:50,066 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 36 [2020-09-04 21:38:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:38:50,066 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-09-04 21:38:50,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 21:38:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-09-04 21:38:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-04 21:38:50,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:38:50,071 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-09-04 21:38:50,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 21:38:50,071 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:38:50,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:38:50,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1309951713, now seen corresponding path program 1 times [2020-09-04 21:38:50,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:38:50,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315909510] [2020-09-04 21:38:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:38:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:50,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:38:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:50,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:38:50,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:50,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:50,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 21:38:50,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:50,199 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-04 21:38:50,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315909510] [2020-09-04 21:38:50,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:38:50,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 21:38:50,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678403696] [2020-09-04 21:38:50,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 21:38:50,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:38:50,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 21:38:50,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 21:38:50,205 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 5 states. [2020-09-04 21:38:50,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:38:50,286 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-09-04 21:38:50,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 21:38:50,287 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-09-04 21:38:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:38:50,289 INFO L225 Difference]: With dead ends: 46 [2020-09-04 21:38:50,289 INFO L226 Difference]: Without dead ends: 40 [2020-09-04 21:38:50,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 21:38:50,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-04 21:38:50,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-04 21:38:50,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-04 21:38:50,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-09-04 21:38:50,302 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 46 [2020-09-04 21:38:50,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:38:50,303 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-09-04 21:38:50,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 21:38:50,303 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-09-04 21:38:50,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-04 21:38:50,305 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:38:50,306 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-09-04 21:38:50,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 21:38:50,306 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:38:50,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:38:50,307 INFO L82 PathProgramCache]: Analyzing trace with hash 942191350, now seen corresponding path program 2 times [2020-09-04 21:38:50,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:38:50,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859638588] [2020-09-04 21:38:50,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:38:50,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:50,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:38:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:50,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:38:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:50,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:50,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:50,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 21:38:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:50,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-04 21:38:50,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859638588] [2020-09-04 21:38:50,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:38:50,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-04 21:38:50,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980748520] [2020-09-04 21:38:50,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 21:38:50,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:38:50,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 21:38:50,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-09-04 21:38:50,837 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 18 states. [2020-09-04 21:38:51,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:38:51,415 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-09-04 21:38:51,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 21:38:51,415 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2020-09-04 21:38:51,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:38:51,418 INFO L225 Difference]: With dead ends: 68 [2020-09-04 21:38:51,418 INFO L226 Difference]: Without dead ends: 62 [2020-09-04 21:38:51,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-09-04 21:38:51,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-04 21:38:51,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-04 21:38:51,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 21:38:51,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-09-04 21:38:51,440 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 56 [2020-09-04 21:38:51,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:38:51,441 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-09-04 21:38:51,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 21:38:51,441 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-09-04 21:38:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-04 21:38:51,444 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:38:51,444 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:38:51,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 21:38:51,445 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:38:51,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:38:51,445 INFO L82 PathProgramCache]: Analyzing trace with hash -156864787, now seen corresponding path program 1 times [2020-09-04 21:38:51,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:38:51,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [175185879] [2020-09-04 21:38:51,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:38:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:51,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:38:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:51,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:38:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:51,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:51,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 21:38:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:51,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:51,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-04 21:38:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-09-04 21:38:51,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [175185879] [2020-09-04 21:38:51,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:38:51,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-04 21:38:51,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576310762] [2020-09-04 21:38:51,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 21:38:51,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:38:51,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 21:38:51,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-04 21:38:51,574 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 7 states. [2020-09-04 21:38:51,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:38:51,686 INFO L93 Difference]: Finished difference Result 85 states and 109 transitions. [2020-09-04 21:38:51,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 21:38:51,686 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-09-04 21:38:51,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:38:51,688 INFO L225 Difference]: With dead ends: 85 [2020-09-04 21:38:51,688 INFO L226 Difference]: Without dead ends: 45 [2020-09-04 21:38:51,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-04 21:38:51,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-04 21:38:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-04 21:38:51,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-04 21:38:51,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-09-04 21:38:51,701 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 65 [2020-09-04 21:38:51,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:38:51,701 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-09-04 21:38:51,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 21:38:51,702 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-09-04 21:38:51,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-04 21:38:51,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:38:51,703 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 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] [2020-09-04 21:38:51,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 21:38:51,704 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:38:51,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:38:51,704 INFO L82 PathProgramCache]: Analyzing trace with hash 387973505, now seen corresponding path program 3 times [2020-09-04 21:38:51,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:38:51,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753328311] [2020-09-04 21:38:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:38:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:51,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:38:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:51,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:38:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:51,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:51,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:52,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 21:38:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:52,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:52,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-04 21:38:52,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753328311] [2020-09-04 21:38:52,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:38:52,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-04 21:38:52,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793569334] [2020-09-04 21:38:52,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 21:38:52,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:38:52,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 21:38:52,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-09-04 21:38:52,304 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 22 states. [2020-09-04 21:38:52,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:38:52,968 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-09-04 21:38:52,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 21:38:52,969 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 66 [2020-09-04 21:38:52,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:38:52,970 INFO L225 Difference]: With dead ends: 62 [2020-09-04 21:38:52,971 INFO L226 Difference]: Without dead ends: 56 [2020-09-04 21:38:52,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 21:38:52,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-04 21:38:52,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-09-04 21:38:52,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-04 21:38:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-09-04 21:38:52,984 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 66 [2020-09-04 21:38:52,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:38:52,985 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-09-04 21:38:52,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 21:38:52,985 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-09-04 21:38:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-04 21:38:52,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:38:52,987 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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] [2020-09-04 21:38:52,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 21:38:52,987 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:38:52,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:38:52,988 INFO L82 PathProgramCache]: Analyzing trace with hash 681092950, now seen corresponding path program 4 times [2020-09-04 21:38:52,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:38:52,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699713876] [2020-09-04 21:38:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:38:53,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:53,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:38:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:53,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:38:53,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:53,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:53,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 21:38:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:53,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:53,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:53,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:53,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 11 proven. 69 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-04 21:38:53,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699713876] [2020-09-04 21:38:53,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:38:53,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-04 21:38:53,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581834463] [2020-09-04 21:38:53,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 21:38:53,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:38:53,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 21:38:53,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2020-09-04 21:38:53,558 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 24 states. [2020-09-04 21:38:54,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:38:54,469 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-09-04 21:38:54,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 21:38:54,470 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2020-09-04 21:38:54,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:38:54,471 INFO L225 Difference]: With dead ends: 67 [2020-09-04 21:38:54,471 INFO L226 Difference]: Without dead ends: 61 [2020-09-04 21:38:54,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 21:38:54,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-04 21:38:54,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-09-04 21:38:54,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-04 21:38:54,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-09-04 21:38:54,486 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 76 [2020-09-04 21:38:54,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:38:54,491 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-09-04 21:38:54,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 21:38:54,491 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-09-04 21:38:54,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 21:38:54,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:38:54,493 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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] [2020-09-04 21:38:54,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 21:38:54,494 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:38:54,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:38:54,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1036512223, now seen corresponding path program 5 times [2020-09-04 21:38:54,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:38:54,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857420226] [2020-09-04 21:38:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:38:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:54,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:38:54,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:54,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:38:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:54,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:54,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 21:38:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:54,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:55,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:55,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:55,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:55,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:55,280 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 14 proven. 98 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-04 21:38:55,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857420226] [2020-09-04 21:38:55,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:38:55,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-04 21:38:55,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217609233] [2020-09-04 21:38:55,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 21:38:55,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:38:55,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 21:38:55,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2020-09-04 21:38:55,285 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 26 states. [2020-09-04 21:38:56,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:38:56,509 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-09-04 21:38:56,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 21:38:56,509 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 86 [2020-09-04 21:38:56,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:38:56,511 INFO L225 Difference]: With dead ends: 72 [2020-09-04 21:38:56,512 INFO L226 Difference]: Without dead ends: 66 [2020-09-04 21:38:56,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=232, Invalid=1660, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 21:38:56,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-04 21:38:56,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-09-04 21:38:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 21:38:56,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-09-04 21:38:56,536 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 86 [2020-09-04 21:38:56,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:38:56,538 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-09-04 21:38:56,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 21:38:56,538 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-09-04 21:38:56,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-04 21:38:56,543 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:38:56,543 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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] [2020-09-04 21:38:56,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 21:38:56,544 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:38:56,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:38:56,544 INFO L82 PathProgramCache]: Analyzing trace with hash -972388074, now seen corresponding path program 6 times [2020-09-04 21:38:56,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:38:56,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936586592] [2020-09-04 21:38:56,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:38:56,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:56,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:38:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:56,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:38:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:56,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:56,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:56,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:56,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 21:38:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:56,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:56,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:56,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-09-04 21:38:56,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936586592] [2020-09-04 21:38:56,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:38:56,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-04 21:38:56,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840830319] [2020-09-04 21:38:56,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 21:38:56,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:38:56,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 21:38:56,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-09-04 21:38:56,950 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 17 states. [2020-09-04 21:38:57,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:38:57,502 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-09-04 21:38:57,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 21:38:57,503 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-09-04 21:38:57,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:38:57,504 INFO L225 Difference]: With dead ends: 76 [2020-09-04 21:38:57,504 INFO L226 Difference]: Without dead ends: 70 [2020-09-04 21:38:57,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2020-09-04 21:38:57,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-04 21:38:57,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-04 21:38:57,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-04 21:38:57,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2020-09-04 21:38:57,518 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 76 [2020-09-04 21:38:57,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:38:57,519 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2020-09-04 21:38:57,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 21:38:57,519 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2020-09-04 21:38:57,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-04 21:38:57,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:38:57,521 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 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] [2020-09-04 21:38:57,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 21:38:57,521 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:38:57,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:38:57,521 INFO L82 PathProgramCache]: Analyzing trace with hash -516505397, now seen corresponding path program 7 times [2020-09-04 21:38:57,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:38:57,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362019984] [2020-09-04 21:38:57,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:38:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:57,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:38:57,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:57,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:38:57,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:57,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:57,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:57,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 21:38:57,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:57,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-04 21:38:57,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362019984] [2020-09-04 21:38:57,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:38:57,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-04 21:38:57,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272312674] [2020-09-04 21:38:57,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 21:38:57,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:38:57,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 21:38:57,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-09-04 21:38:57,911 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand 19 states. [2020-09-04 21:38:58,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:38:58,685 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-09-04 21:38:58,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 21:38:58,685 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 66 [2020-09-04 21:38:58,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:38:58,687 INFO L225 Difference]: With dead ends: 76 [2020-09-04 21:38:58,687 INFO L226 Difference]: Without dead ends: 70 [2020-09-04 21:38:58,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2020-09-04 21:38:58,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-04 21:38:58,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-04 21:38:58,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-04 21:38:58,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-09-04 21:38:58,700 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 66 [2020-09-04 21:38:58,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:38:58,701 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-09-04 21:38:58,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 21:38:58,701 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-09-04 21:38:58,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-04 21:38:58,702 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:38:58,702 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-09-04 21:38:58,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 21:38:58,703 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:38:58,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:38:58,703 INFO L82 PathProgramCache]: Analyzing trace with hash -694157514, now seen corresponding path program 8 times [2020-09-04 21:38:58,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:38:58,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398080234] [2020-09-04 21:38:58,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:38:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:58,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:38:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:58,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:38:58,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:58,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:58,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:59,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:59,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 21:38:59,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:59,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:59,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:59,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:59,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:59,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:59,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:38:59,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:38:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 24 proven. 129 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-09-04 21:38:59,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398080234] [2020-09-04 21:38:59,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:38:59,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-04 21:38:59,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268580812] [2020-09-04 21:38:59,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 21:38:59,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:38:59,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 21:38:59,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-09-04 21:38:59,453 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 26 states. [2020-09-04 21:39:00,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:00,817 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-09-04 21:39:00,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 21:39:00,818 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 96 [2020-09-04 21:39:00,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:00,819 INFO L225 Difference]: With dead ends: 76 [2020-09-04 21:39:00,819 INFO L226 Difference]: Without dead ends: 70 [2020-09-04 21:39:00,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 21:39:00,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-04 21:39:00,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-04 21:39:00,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-04 21:39:00,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2020-09-04 21:39:00,833 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 96 [2020-09-04 21:39:00,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:00,833 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2020-09-04 21:39:00,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 21:39:00,834 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2020-09-04 21:39:00,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 21:39:00,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:00,835 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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] [2020-09-04 21:39:00,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 21:39:00,835 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:00,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:00,836 INFO L82 PathProgramCache]: Analyzing trace with hash -27101013, now seen corresponding path program 9 times [2020-09-04 21:39:00,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:00,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79775669] [2020-09-04 21:39:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:00,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:00,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:00,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:00,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:00,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:00,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:01,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:01,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:01,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 21:39:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:01,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:01,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:01,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:01,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 19 proven. 95 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-09-04 21:39:01,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79775669] [2020-09-04 21:39:01,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:01,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-04 21:39:01,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566196645] [2020-09-04 21:39:01,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 21:39:01,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:01,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 21:39:01,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-09-04 21:39:01,444 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 24 states. [2020-09-04 21:39:02,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:02,396 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2020-09-04 21:39:02,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 21:39:02,397 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-09-04 21:39:02,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:02,398 INFO L225 Difference]: With dead ends: 76 [2020-09-04 21:39:02,398 INFO L226 Difference]: Without dead ends: 70 [2020-09-04 21:39:02,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 21:39:02,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-04 21:39:02,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-09-04 21:39:02,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-04 21:39:02,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-09-04 21:39:02,411 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 86 [2020-09-04 21:39:02,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:02,411 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-09-04 21:39:02,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 21:39:02,411 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-09-04 21:39:02,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-04 21:39:02,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:02,413 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-09-04 21:39:02,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 21:39:02,413 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:02,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:02,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1669317558, now seen corresponding path program 10 times [2020-09-04 21:39:02,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:02,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608898651] [2020-09-04 21:39:02,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:02,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:02,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:02,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:02,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:02,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 21:39:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:02,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:02,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:02,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:02,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:03,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:03,170 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 17 proven. 132 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-09-04 21:39:03,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608898651] [2020-09-04 21:39:03,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:03,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-04 21:39:03,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065714479] [2020-09-04 21:39:03,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 21:39:03,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:03,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 21:39:03,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-09-04 21:39:03,172 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 28 states. [2020-09-04 21:39:04,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:04,712 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2020-09-04 21:39:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 21:39:04,713 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 96 [2020-09-04 21:39:04,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:04,714 INFO L225 Difference]: With dead ends: 81 [2020-09-04 21:39:04,715 INFO L226 Difference]: Without dead ends: 75 [2020-09-04 21:39:04,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=267, Invalid=2085, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 21:39:04,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-04 21:39:04,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-09-04 21:39:04,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-04 21:39:04,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2020-09-04 21:39:04,730 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 96 [2020-09-04 21:39:04,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:04,730 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2020-09-04 21:39:04,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 21:39:04,730 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2020-09-04 21:39:04,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-04 21:39:04,732 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:04,732 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-09-04 21:39:04,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 21:39:04,732 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:04,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:04,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1979672437, now seen corresponding path program 11 times [2020-09-04 21:39:04,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:04,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239187843] [2020-09-04 21:39:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:04,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:04,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:04,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:04,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:04,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:04,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:05,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 21:39:05,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:05,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:05,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:05,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:05,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:05,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 29 proven. 168 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-09-04 21:39:05,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239187843] [2020-09-04 21:39:05,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:05,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-04 21:39:05,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239811077] [2020-09-04 21:39:05,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 21:39:05,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:05,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 21:39:05,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-09-04 21:39:05,594 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 28 states. [2020-09-04 21:39:07,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:07,265 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-09-04 21:39:07,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 21:39:07,266 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-09-04 21:39:07,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:07,268 INFO L225 Difference]: With dead ends: 81 [2020-09-04 21:39:07,268 INFO L226 Difference]: Without dead ends: 75 [2020-09-04 21:39:07,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 21:39:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-04 21:39:07,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2020-09-04 21:39:07,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-04 21:39:07,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-09-04 21:39:07,281 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 106 [2020-09-04 21:39:07,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:07,282 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-09-04 21:39:07,282 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 21:39:07,282 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-09-04 21:39:07,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-04 21:39:07,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:07,283 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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] [2020-09-04 21:39:07,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 21:39:07,284 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:07,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:07,284 INFO L82 PathProgramCache]: Analyzing trace with hash 275016086, now seen corresponding path program 12 times [2020-09-04 21:39:07,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:07,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464071705] [2020-09-04 21:39:07,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:07,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:07,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:07,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:07,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:07,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:07,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:07,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:07,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-04 21:39:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:07,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 2 proven. 72 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-09-04 21:39:07,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464071705] [2020-09-04 21:39:07,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:07,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-04 21:39:07,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300948786] [2020-09-04 21:39:07,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-04 21:39:07,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:07,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-04 21:39:07,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-09-04 21:39:07,839 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 22 states. [2020-09-04 21:39:08,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:08,872 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2020-09-04 21:39:08,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 21:39:08,873 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 76 [2020-09-04 21:39:08,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:08,874 INFO L225 Difference]: With dead ends: 81 [2020-09-04 21:39:08,875 INFO L226 Difference]: Without dead ends: 75 [2020-09-04 21:39:08,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 21:39:08,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-04 21:39:08,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-09-04 21:39:08,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-04 21:39:08,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2020-09-04 21:39:08,888 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 76 [2020-09-04 21:39:08,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:08,888 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2020-09-04 21:39:08,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-04 21:39:08,889 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2020-09-04 21:39:08,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-04 21:39:08,890 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:08,890 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-09-04 21:39:08,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 21:39:08,891 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:08,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:08,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1359901377, now seen corresponding path program 13 times [2020-09-04 21:39:08,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:08,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549270810] [2020-09-04 21:39:08,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:08,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:08,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:08,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:09,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:09,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:09,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:09,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:09,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-04 21:39:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:09,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:09,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:09,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:09,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:09,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:09,718 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 28 proven. 169 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-09-04 21:39:09,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549270810] [2020-09-04 21:39:09,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:09,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-04 21:39:09,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108621451] [2020-09-04 21:39:09,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 21:39:09,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:09,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 21:39:09,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-09-04 21:39:09,720 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand 28 states. [2020-09-04 21:39:11,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:11,286 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2020-09-04 21:39:11,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 21:39:11,287 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-09-04 21:39:11,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:11,288 INFO L225 Difference]: With dead ends: 81 [2020-09-04 21:39:11,288 INFO L226 Difference]: Without dead ends: 75 [2020-09-04 21:39:11,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=228, Invalid=1842, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 21:39:11,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-04 21:39:11,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-09-04 21:39:11,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-04 21:39:11,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2020-09-04 21:39:11,309 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 106 [2020-09-04 21:39:11,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:11,310 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2020-09-04 21:39:11,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 21:39:11,310 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2020-09-04 21:39:11,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-04 21:39:11,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:11,311 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-09-04 21:39:11,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 21:39:11,312 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:11,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:11,312 INFO L82 PathProgramCache]: Analyzing trace with hash 863423990, now seen corresponding path program 14 times [2020-09-04 21:39:11,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:11,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139227810] [2020-09-04 21:39:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:11,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:11,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:11,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:11,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:11,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:11,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:11,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:11,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:11,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:11,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-04 21:39:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:11,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:11,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:11,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:11,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:11,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:11,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:11,859 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 21 proven. 115 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-09-04 21:39:11,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139227810] [2020-09-04 21:39:11,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:11,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-04 21:39:11,862 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032601622] [2020-09-04 21:39:11,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-04 21:39:11,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:11,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-04 21:39:11,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2020-09-04 21:39:11,864 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand 19 states. [2020-09-04 21:39:12,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:12,624 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-09-04 21:39:12,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 21:39:12,625 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2020-09-04 21:39:12,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:12,626 INFO L225 Difference]: With dead ends: 81 [2020-09-04 21:39:12,626 INFO L226 Difference]: Without dead ends: 75 [2020-09-04 21:39:12,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 21:39:12,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-04 21:39:12,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-09-04 21:39:12,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-04 21:39:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2020-09-04 21:39:12,648 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 96 [2020-09-04 21:39:12,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:12,649 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2020-09-04 21:39:12,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-04 21:39:12,649 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2020-09-04 21:39:12,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-04 21:39:12,652 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:12,652 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-09-04 21:39:12,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-04 21:39:12,652 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:12,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:12,653 INFO L82 PathProgramCache]: Analyzing trace with hash -412591530, now seen corresponding path program 15 times [2020-09-04 21:39:12,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:12,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268770785] [2020-09-04 21:39:12,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:12,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:12,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:12,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:12,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:12,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:13,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:13,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-04 21:39:13,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:13,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:13,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:13,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:13,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:13,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:13,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:13,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 33 proven. 213 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-09-04 21:39:13,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268770785] [2020-09-04 21:39:13,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:13,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-04 21:39:13,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542304825] [2020-09-04 21:39:13,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 21:39:13,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:13,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 21:39:13,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2020-09-04 21:39:13,721 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand 30 states. [2020-09-04 21:39:15,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:15,571 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2020-09-04 21:39:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 21:39:15,573 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 116 [2020-09-04 21:39:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:15,575 INFO L225 Difference]: With dead ends: 81 [2020-09-04 21:39:15,575 INFO L226 Difference]: Without dead ends: 75 [2020-09-04 21:39:15,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=260, Invalid=2290, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 21:39:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-04 21:39:15,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-09-04 21:39:15,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-04 21:39:15,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2020-09-04 21:39:15,588 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 116 [2020-09-04 21:39:15,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:15,589 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2020-09-04 21:39:15,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 21:39:15,589 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2020-09-04 21:39:15,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 21:39:15,590 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:15,590 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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] [2020-09-04 21:39:15,590 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-04 21:39:15,590 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:15,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:15,591 INFO L82 PathProgramCache]: Analyzing trace with hash -945819615, now seen corresponding path program 16 times [2020-09-04 21:39:15,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:15,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534088713] [2020-09-04 21:39:15,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:15,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:15,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:15,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:15,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:15,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:15,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:15,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:15,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:15,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:16,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-04 21:39:16,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:16,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:16,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-09-04 21:39:16,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534088713] [2020-09-04 21:39:16,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:16,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-04 21:39:16,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528430828] [2020-09-04 21:39:16,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 21:39:16,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:16,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 21:39:16,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-09-04 21:39:16,286 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 24 states. [2020-09-04 21:39:17,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:17,360 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-09-04 21:39:17,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 21:39:17,361 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-09-04 21:39:17,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:17,362 INFO L225 Difference]: With dead ends: 81 [2020-09-04 21:39:17,363 INFO L226 Difference]: Without dead ends: 75 [2020-09-04 21:39:17,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 21:39:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-04 21:39:17,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2020-09-04 21:39:17,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-04 21:39:17,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-09-04 21:39:17,374 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 86 [2020-09-04 21:39:17,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:17,375 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-09-04 21:39:17,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 21:39:17,375 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-09-04 21:39:17,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-04 21:39:17,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:17,376 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-09-04 21:39:17,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-04 21:39:17,377 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:17,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:17,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1946255679, now seen corresponding path program 17 times [2020-09-04 21:39:17,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:17,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233924615] [2020-09-04 21:39:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:17,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:17,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:17,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:17,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:17,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:17,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 21:39:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:17,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:17,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:17,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:17,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:17,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:18,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:18,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:18,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 20 proven. 171 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-09-04 21:39:18,377 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233924615] [2020-09-04 21:39:18,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:18,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-04 21:39:18,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534187321] [2020-09-04 21:39:18,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 21:39:18,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:18,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 21:39:18,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2020-09-04 21:39:18,381 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 30 states. [2020-09-04 21:39:20,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:20,326 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2020-09-04 21:39:20,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 21:39:20,327 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 106 [2020-09-04 21:39:20,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:20,328 INFO L225 Difference]: With dead ends: 86 [2020-09-04 21:39:20,328 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 21:39:20,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=302, Invalid=2560, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 21:39:20,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 21:39:20,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-09-04 21:39:20,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-04 21:39:20,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2020-09-04 21:39:20,343 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 106 [2020-09-04 21:39:20,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:20,344 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2020-09-04 21:39:20,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 21:39:20,344 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2020-09-04 21:39:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-04 21:39:20,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:20,345 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-09-04 21:39:20,346 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-04 21:39:20,346 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:20,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:20,346 INFO L82 PathProgramCache]: Analyzing trace with hash -657519274, now seen corresponding path program 18 times [2020-09-04 21:39:20,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:20,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932901525] [2020-09-04 21:39:20,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:20,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:20,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:20,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:20,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:20,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:20,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 21:39:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:20,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:20,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:20,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:20,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:21,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:21,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:21,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:21,470 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 34 proven. 212 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-09-04 21:39:21,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932901525] [2020-09-04 21:39:21,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:21,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-04 21:39:21,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240787383] [2020-09-04 21:39:21,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 21:39:21,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:21,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 21:39:21,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2020-09-04 21:39:21,473 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 30 states. [2020-09-04 21:39:23,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:23,524 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-09-04 21:39:23,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 21:39:23,525 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 116 [2020-09-04 21:39:23,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:23,527 INFO L225 Difference]: With dead ends: 90 [2020-09-04 21:39:23,527 INFO L226 Difference]: Without dead ends: 84 [2020-09-04 21:39:23,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=283, Invalid=2579, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 21:39:23,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-04 21:39:23,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2020-09-04 21:39:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-04 21:39:23,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2020-09-04 21:39:23,541 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 116 [2020-09-04 21:39:23,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:23,541 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2020-09-04 21:39:23,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 21:39:23,542 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2020-09-04 21:39:23,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-04 21:39:23,543 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:23,543 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-09-04 21:39:23,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-04 21:39:23,544 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:23,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:23,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1569934689, now seen corresponding path program 19 times [2020-09-04 21:39:23,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:23,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932264577] [2020-09-04 21:39:23,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:23,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:23,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:23,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:23,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:23,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:23,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:23,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:23,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:23,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-04 21:39:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:24,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:24,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:24,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:24,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:24,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:24,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:24,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:24,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:24,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:24,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:24,722 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 38 proven. 262 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-09-04 21:39:24,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932264577] [2020-09-04 21:39:24,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:24,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 21:39:24,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931846824] [2020-09-04 21:39:24,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 21:39:24,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:24,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 21:39:24,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-09-04 21:39:24,725 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 32 states. [2020-09-04 21:39:26,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:26,919 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2020-09-04 21:39:26,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 21:39:26,920 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-09-04 21:39:26,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:26,922 INFO L225 Difference]: With dead ends: 86 [2020-09-04 21:39:26,922 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 21:39:26,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=292, Invalid=2788, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 21:39:26,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 21:39:26,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-09-04 21:39:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-04 21:39:26,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2020-09-04 21:39:26,959 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 126 [2020-09-04 21:39:26,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:26,960 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2020-09-04 21:39:26,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 21:39:26,961 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2020-09-04 21:39:26,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-04 21:39:26,962 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:26,962 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-09-04 21:39:26,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-04 21:39:26,963 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:26,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:26,963 INFO L82 PathProgramCache]: Analyzing trace with hash -2059208469, now seen corresponding path program 20 times [2020-09-04 21:39:26,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:26,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213596474] [2020-09-04 21:39:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:27,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:27,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:27,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:27,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:27,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:27,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:27,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:27,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 21:39:27,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:27,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:27,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:27,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:27,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:28,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:28,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 37 proven. 263 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-09-04 21:39:28,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213596474] [2020-09-04 21:39:28,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:28,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 21:39:28,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767692081] [2020-09-04 21:39:28,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 21:39:28,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:28,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 21:39:28,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-09-04 21:39:28,347 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand 32 states. [2020-09-04 21:39:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:30,694 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2020-09-04 21:39:30,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 21:39:30,695 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-09-04 21:39:30,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:30,697 INFO L225 Difference]: With dead ends: 86 [2020-09-04 21:39:30,697 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 21:39:30,698 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=269, Invalid=2487, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 21:39:30,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 21:39:30,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-09-04 21:39:30,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-04 21:39:30,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2020-09-04 21:39:30,712 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 126 [2020-09-04 21:39:30,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:30,713 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2020-09-04 21:39:30,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 21:39:30,713 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2020-09-04 21:39:30,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-04 21:39:30,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:30,714 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-09-04 21:39:30,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-04 21:39:30,715 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:30,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:30,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1034127946, now seen corresponding path program 21 times [2020-09-04 21:39:30,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:30,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287969312] [2020-09-04 21:39:30,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:30,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:30,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:30,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:30,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:30,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:31,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:31,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:31,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:31,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 21:39:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:31,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:31,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:31,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:31,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:31,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:31,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:32,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:32,193 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 42 proven. 317 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-09-04 21:39:32,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287969312] [2020-09-04 21:39:32,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:32,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-04 21:39:32,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442071687] [2020-09-04 21:39:32,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 21:39:32,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:32,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 21:39:32,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 21:39:32,203 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand 34 states. [2020-09-04 21:39:34,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:34,629 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2020-09-04 21:39:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 21:39:34,630 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-09-04 21:39:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:34,631 INFO L225 Difference]: With dead ends: 86 [2020-09-04 21:39:34,631 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 21:39:34,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2020-09-04 21:39:34,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 21:39:34,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-09-04 21:39:34,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-04 21:39:34,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-09-04 21:39:34,643 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 136 [2020-09-04 21:39:34,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:34,643 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-09-04 21:39:34,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 21:39:34,643 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-09-04 21:39:34,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-04 21:39:34,644 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:34,645 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-09-04 21:39:34,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-04 21:39:34,645 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:34,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:34,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1452329227, now seen corresponding path program 22 times [2020-09-04 21:39:34,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:34,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639812465] [2020-09-04 21:39:34,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:34,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:34,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:34,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:34,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:34,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:34,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:34,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:34,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:35,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:35,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 21:39:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:35,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:35,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:35,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 25 proven. 172 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-09-04 21:39:35,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639812465] [2020-09-04 21:39:35,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:35,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-04 21:39:35,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355922728] [2020-09-04 21:39:35,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 21:39:35,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:35,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 21:39:35,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-09-04 21:39:35,554 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 28 states. [2020-09-04 21:39:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:37,121 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2020-09-04 21:39:37,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 21:39:37,122 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-09-04 21:39:37,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:37,124 INFO L225 Difference]: With dead ends: 86 [2020-09-04 21:39:37,124 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 21:39:37,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=228, Invalid=1842, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 21:39:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 21:39:37,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-09-04 21:39:37,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-04 21:39:37,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2020-09-04 21:39:37,139 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 106 [2020-09-04 21:39:37,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:37,139 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2020-09-04 21:39:37,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 21:39:37,139 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2020-09-04 21:39:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-04 21:39:37,140 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:37,140 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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] [2020-09-04 21:39:37,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-04 21:39:37,140 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:37,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:37,141 INFO L82 PathProgramCache]: Analyzing trace with hash -274136789, now seen corresponding path program 23 times [2020-09-04 21:39:37,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:37,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091779035] [2020-09-04 21:39:37,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:37,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:37,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:37,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:37,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:37,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:37,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:37,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:37,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 21:39:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:37,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 2 proven. 102 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-09-04 21:39:37,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091779035] [2020-09-04 21:39:37,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:37,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-04 21:39:37,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376238766] [2020-09-04 21:39:37,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-04 21:39:37,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:37,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-04 21:39:37,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-09-04 21:39:37,903 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand 24 states. [2020-09-04 21:39:39,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:39,328 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-09-04 21:39:39,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-04 21:39:39,329 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-09-04 21:39:39,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:39,330 INFO L225 Difference]: With dead ends: 86 [2020-09-04 21:39:39,331 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 21:39:39,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2020-09-04 21:39:39,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 21:39:39,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-09-04 21:39:39,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-04 21:39:39,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2020-09-04 21:39:39,343 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 86 [2020-09-04 21:39:39,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:39,344 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2020-09-04 21:39:39,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-04 21:39:39,344 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2020-09-04 21:39:39,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-04 21:39:39,345 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:39,345 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-09-04 21:39:39,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-04 21:39:39,346 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:39,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:39,346 INFO L82 PathProgramCache]: Analyzing trace with hash -261107338, now seen corresponding path program 24 times [2020-09-04 21:39:39,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:39,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461099496] [2020-09-04 21:39:39,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:39,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:39,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:39,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:39,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:39,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:39,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:39,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:39,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:39,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 21:39:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:40,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:40,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:40,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:40,178 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 20 proven. 133 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-09-04 21:39:40,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461099496] [2020-09-04 21:39:40,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:40,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-04 21:39:40,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995475543] [2020-09-04 21:39:40,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 21:39:40,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:40,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 21:39:40,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-09-04 21:39:40,180 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand 26 states. [2020-09-04 21:39:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:41,584 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2020-09-04 21:39:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 21:39:41,585 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 96 [2020-09-04 21:39:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:41,586 INFO L225 Difference]: With dead ends: 86 [2020-09-04 21:39:41,586 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 21:39:41,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 21:39:41,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 21:39:41,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-09-04 21:39:41,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-04 21:39:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2020-09-04 21:39:41,599 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 96 [2020-09-04 21:39:41,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:41,600 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2020-09-04 21:39:41,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 21:39:41,600 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2020-09-04 21:39:41,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-04 21:39:41,601 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:41,601 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-09-04 21:39:41,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-04 21:39:41,602 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:41,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:41,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1695721578, now seen corresponding path program 25 times [2020-09-04 21:39:41,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:41,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165459559] [2020-09-04 21:39:41,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:41,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:41,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:41,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:41,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:41,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:41,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:41,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:41,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:42,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:42,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 21:39:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:42,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:42,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:42,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:42,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:42,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:42,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 30 proven. 194 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-09-04 21:39:42,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165459559] [2020-09-04 21:39:42,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:42,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-04 21:39:42,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316742428] [2020-09-04 21:39:42,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-04 21:39:42,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:42,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-04 21:39:42,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-09-04 21:39:42,272 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 21 states. [2020-09-04 21:39:43,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:43,355 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2020-09-04 21:39:43,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 21:39:43,357 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 116 [2020-09-04 21:39:43,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:43,358 INFO L225 Difference]: With dead ends: 86 [2020-09-04 21:39:43,358 INFO L226 Difference]: Without dead ends: 80 [2020-09-04 21:39:43,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 21:39:43,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-04 21:39:43,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-09-04 21:39:43,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-04 21:39:43,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2020-09-04 21:39:43,371 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 116 [2020-09-04 21:39:43,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:43,371 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2020-09-04 21:39:43,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-04 21:39:43,372 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2020-09-04 21:39:43,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-04 21:39:43,373 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:43,373 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-09-04 21:39:43,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-04 21:39:43,373 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:43,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:43,374 INFO L82 PathProgramCache]: Analyzing trace with hash -29620202, now seen corresponding path program 26 times [2020-09-04 21:39:43,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:43,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337749609] [2020-09-04 21:39:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:43,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:43,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:43,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:43,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 21:39:43,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:43,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:43,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:43,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:43,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:44,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:44,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:44,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:44,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:44,543 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 23 proven. 215 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-09-04 21:39:44,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337749609] [2020-09-04 21:39:44,543 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:44,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 21:39:44,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315088499] [2020-09-04 21:39:44,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 21:39:44,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:44,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 21:39:44,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2020-09-04 21:39:44,545 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand 32 states. [2020-09-04 21:39:46,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:46,864 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2020-09-04 21:39:46,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 21:39:46,865 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 116 [2020-09-04 21:39:46,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:46,867 INFO L225 Difference]: With dead ends: 91 [2020-09-04 21:39:46,867 INFO L226 Difference]: Without dead ends: 85 [2020-09-04 21:39:46,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=337, Invalid=3085, Unknown=0, NotChecked=0, Total=3422 [2020-09-04 21:39:46,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-04 21:39:46,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-09-04 21:39:46,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-04 21:39:46,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2020-09-04 21:39:46,885 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 116 [2020-09-04 21:39:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:46,888 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2020-09-04 21:39:46,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 21:39:46,888 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2020-09-04 21:39:46,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-04 21:39:46,889 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:46,889 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-09-04 21:39:46,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-04 21:39:46,890 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:46,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:46,890 INFO L82 PathProgramCache]: Analyzing trace with hash 189735019, now seen corresponding path program 27 times [2020-09-04 21:39:46,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:46,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817426515] [2020-09-04 21:39:46,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:46,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:46,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:46,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:47,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:47,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:47,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 21:39:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:47,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:47,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:47,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:47,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:47,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:47,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:47,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:47,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:48,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:48,141 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 39 proven. 261 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-09-04 21:39:48,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817426515] [2020-09-04 21:39:48,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:48,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 21:39:48,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897631792] [2020-09-04 21:39:48,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 21:39:48,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:48,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 21:39:48,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-09-04 21:39:48,144 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand 32 states. [2020-09-04 21:39:50,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:50,883 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2020-09-04 21:39:50,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 21:39:50,883 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-09-04 21:39:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:50,885 INFO L225 Difference]: With dead ends: 95 [2020-09-04 21:39:50,885 INFO L226 Difference]: Without dead ends: 89 [2020-09-04 21:39:50,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=315, Invalid=3107, Unknown=0, NotChecked=0, Total=3422 [2020-09-04 21:39:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-04 21:39:50,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-09-04 21:39:50,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-04 21:39:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2020-09-04 21:39:50,902 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 126 [2020-09-04 21:39:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:50,903 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2020-09-04 21:39:50,903 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 21:39:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2020-09-04 21:39:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-04 21:39:50,904 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:50,904 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-09-04 21:39:50,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-04 21:39:50,905 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:50,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:50,905 INFO L82 PathProgramCache]: Analyzing trace with hash -40431946, now seen corresponding path program 28 times [2020-09-04 21:39:50,905 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:50,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30761854] [2020-09-04 21:39:50,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:50,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:51,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:51,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:51,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:51,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:51,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:51,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:51,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:51,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-04 21:39:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:51,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:51,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:51,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:51,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:51,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:51,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:52,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:52,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:52,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:52,394 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 43 proven. 316 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-09-04 21:39:52,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30761854] [2020-09-04 21:39:52,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:52,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-04 21:39:52,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586570680] [2020-09-04 21:39:52,395 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 21:39:52,395 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:52,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 21:39:52,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 21:39:52,396 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand 34 states. [2020-09-04 21:39:55,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:39:55,403 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2020-09-04 21:39:55,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 21:39:55,404 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-09-04 21:39:55,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:39:55,406 INFO L225 Difference]: With dead ends: 95 [2020-09-04 21:39:55,406 INFO L226 Difference]: Without dead ends: 89 [2020-09-04 21:39:55,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=324, Invalid=3336, Unknown=0, NotChecked=0, Total=3660 [2020-09-04 21:39:55,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-04 21:39:55,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-09-04 21:39:55,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-04 21:39:55,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2020-09-04 21:39:55,423 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 136 [2020-09-04 21:39:55,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:39:55,423 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2020-09-04 21:39:55,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 21:39:55,423 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2020-09-04 21:39:55,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-04 21:39:55,424 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:39:55,425 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-09-04 21:39:55,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-04 21:39:55,425 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:39:55,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:39:55,425 INFO L82 PathProgramCache]: Analyzing trace with hash -419589941, now seen corresponding path program 29 times [2020-09-04 21:39:55,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:39:55,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001525538] [2020-09-04 21:39:55,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:39:55,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:55,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:39:55,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:55,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:39:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:55,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:55,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:55,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:55,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:55,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:56,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 21:39:56,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:56,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:56,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:56,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:56,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:56,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:56,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:56,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:56,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:39:56,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:39:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 47 proven. 376 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-09-04 21:39:57,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001525538] [2020-09-04 21:39:57,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:39:57,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-04 21:39:57,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417795792] [2020-09-04 21:39:57,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 21:39:57,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:39:57,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 21:39:57,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 21:39:57,042 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand 36 states. [2020-09-04 21:40:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:40:00,194 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2020-09-04 21:40:00,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 21:40:00,196 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 146 [2020-09-04 21:40:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:40:00,197 INFO L225 Difference]: With dead ends: 91 [2020-09-04 21:40:00,197 INFO L226 Difference]: Without dead ends: 85 [2020-09-04 21:40:00,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=333, Invalid=3573, Unknown=0, NotChecked=0, Total=3906 [2020-09-04 21:40:00,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-04 21:40:00,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-09-04 21:40:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-04 21:40:00,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-09-04 21:40:00,212 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 146 [2020-09-04 21:40:00,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:40:00,213 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-09-04 21:40:00,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 21:40:00,213 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-09-04 21:40:00,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-04 21:40:00,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:40:00,214 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-09-04 21:40:00,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-04 21:40:00,214 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:40:00,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:40:00,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1145337910, now seen corresponding path program 30 times [2020-09-04 21:40:00,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:40:00,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765111232] [2020-09-04 21:40:00,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:40:00,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:00,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:40:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:00,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:40:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:00,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:00,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:00,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:00,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:00,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:00,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-04 21:40:00,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:00,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 2 proven. 137 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-09-04 21:40:01,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765111232] [2020-09-04 21:40:01,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:40:01,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-04 21:40:01,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836705512] [2020-09-04 21:40:01,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-04 21:40:01,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:40:01,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-04 21:40:01,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-09-04 21:40:01,057 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 26 states. [2020-09-04 21:40:02,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:40:02,933 INFO L93 Difference]: Finished difference Result 91 states and 114 transitions. [2020-09-04 21:40:02,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 21:40:02,934 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 96 [2020-09-04 21:40:02,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:40:02,935 INFO L225 Difference]: With dead ends: 91 [2020-09-04 21:40:02,935 INFO L226 Difference]: Without dead ends: 85 [2020-09-04 21:40:02,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=245, Invalid=2011, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 21:40:02,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-04 21:40:02,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-09-04 21:40:02,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-04 21:40:02,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2020-09-04 21:40:02,951 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 96 [2020-09-04 21:40:02,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:40:02,952 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2020-09-04 21:40:02,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-04 21:40:02,952 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2020-09-04 21:40:02,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-04 21:40:02,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:40:02,953 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-09-04 21:40:02,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-04 21:40:02,953 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:40:02,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:40:02,954 INFO L82 PathProgramCache]: Analyzing trace with hash -195212138, now seen corresponding path program 31 times [2020-09-04 21:40:02,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:40:02,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385155375] [2020-09-04 21:40:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:40:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:03,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:40:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:03,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:40:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:03,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:03,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:03,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:03,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:03,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:03,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:03,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-04 21:40:03,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:03,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:03,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:03,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:04,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:04,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:04,163 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 29 proven. 217 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-09-04 21:40:04,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385155375] [2020-09-04 21:40:04,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:40:04,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-04 21:40:04,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296362418] [2020-09-04 21:40:04,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 21:40:04,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:40:04,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 21:40:04,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2020-09-04 21:40:04,167 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand 30 states. [2020-09-04 21:40:06,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:40:06,327 INFO L93 Difference]: Finished difference Result 91 states and 113 transitions. [2020-09-04 21:40:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 21:40:06,329 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 116 [2020-09-04 21:40:06,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:40:06,330 INFO L225 Difference]: With dead ends: 91 [2020-09-04 21:40:06,331 INFO L226 Difference]: Without dead ends: 85 [2020-09-04 21:40:06,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=260, Invalid=2290, Unknown=0, NotChecked=0, Total=2550 [2020-09-04 21:40:06,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-04 21:40:06,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-09-04 21:40:06,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-04 21:40:06,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2020-09-04 21:40:06,347 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 116 [2020-09-04 21:40:06,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:40:06,347 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2020-09-04 21:40:06,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 21:40:06,347 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2020-09-04 21:40:06,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-04 21:40:06,349 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:40:06,349 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-09-04 21:40:06,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-04 21:40:06,349 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:40:06,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:40:06,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1230973281, now seen corresponding path program 32 times [2020-09-04 21:40:06,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:40:06,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456466260] [2020-09-04 21:40:06,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:40:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:06,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:40:06,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:06,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:40:06,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:06,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:06,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:06,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:06,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:06,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:06,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:07,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-04 21:40:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:07,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:07,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:07,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:07,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:07,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 34 proven. 266 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-09-04 21:40:07,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456466260] [2020-09-04 21:40:07,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:40:07,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 21:40:07,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405421537] [2020-09-04 21:40:07,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 21:40:07,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:40:07,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 21:40:07,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-09-04 21:40:07,643 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand 32 states. [2020-09-04 21:40:10,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:40:10,045 INFO L93 Difference]: Finished difference Result 91 states and 112 transitions. [2020-09-04 21:40:10,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 21:40:10,045 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-09-04 21:40:10,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:40:10,047 INFO L225 Difference]: With dead ends: 91 [2020-09-04 21:40:10,047 INFO L226 Difference]: Without dead ends: 85 [2020-09-04 21:40:10,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=269, Invalid=2487, Unknown=0, NotChecked=0, Total=2756 [2020-09-04 21:40:10,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-04 21:40:10,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-09-04 21:40:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-04 21:40:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2020-09-04 21:40:10,064 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 126 [2020-09-04 21:40:10,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:40:10,064 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2020-09-04 21:40:10,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 21:40:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2020-09-04 21:40:10,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-04 21:40:10,066 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:40:10,066 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-09-04 21:40:10,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-04 21:40:10,066 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:40:10,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:40:10,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1408863231, now seen corresponding path program 33 times [2020-09-04 21:40:10,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:40:10,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307898569] [2020-09-04 21:40:10,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:40:10,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:10,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:40:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:10,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:40:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:10,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:10,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:10,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:10,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:10,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:10,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:10,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:10,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-04 21:40:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:10,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:11,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:11,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:11,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:11,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:11,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 46 proven. 377 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-09-04 21:40:11,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307898569] [2020-09-04 21:40:11,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:40:11,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-04 21:40:11,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150953232] [2020-09-04 21:40:11,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 21:40:11,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:40:11,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 21:40:11,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 21:40:11,686 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand 36 states. [2020-09-04 21:40:14,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:40:14,761 INFO L93 Difference]: Finished difference Result 91 states and 111 transitions. [2020-09-04 21:40:14,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 21:40:14,762 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 146 [2020-09-04 21:40:14,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:40:14,763 INFO L225 Difference]: With dead ends: 91 [2020-09-04 21:40:14,763 INFO L226 Difference]: Without dead ends: 85 [2020-09-04 21:40:14,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=310, Invalid=3230, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 21:40:14,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-04 21:40:14,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-09-04 21:40:14,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-04 21:40:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 100 transitions. [2020-09-04 21:40:14,779 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 100 transitions. Word has length 146 [2020-09-04 21:40:14,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:40:14,780 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 100 transitions. [2020-09-04 21:40:14,780 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 21:40:14,780 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 100 transitions. [2020-09-04 21:40:14,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-04 21:40:14,781 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:40:14,781 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-09-04 21:40:14,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-04 21:40:14,781 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:40:14,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:40:14,782 INFO L82 PathProgramCache]: Analyzing trace with hash 432172374, now seen corresponding path program 34 times [2020-09-04 21:40:14,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:40:14,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985764454] [2020-09-04 21:40:14,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:40:14,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:14,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:40:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:14,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:40:14,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:14,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:15,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:15,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:15,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:15,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:15,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:15,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-04 21:40:15,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:15,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:15,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:15,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:15,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:16,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:16,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:16,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:16,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:16,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:16,616 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 51 proven. 441 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-09-04 21:40:16,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985764454] [2020-09-04 21:40:16,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:40:16,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-04 21:40:16,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254949132] [2020-09-04 21:40:16,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 21:40:16,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:40:16,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 21:40:16,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 21:40:16,618 INFO L87 Difference]: Start difference. First operand 79 states and 100 transitions. Second operand 38 states. [2020-09-04 21:40:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:40:20,190 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2020-09-04 21:40:20,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 21:40:20,191 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 156 [2020-09-04 21:40:20,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:40:20,193 INFO L225 Difference]: With dead ends: 91 [2020-09-04 21:40:20,193 INFO L226 Difference]: Without dead ends: 85 [2020-09-04 21:40:20,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=342, Invalid=3818, Unknown=0, NotChecked=0, Total=4160 [2020-09-04 21:40:20,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-04 21:40:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-09-04 21:40:20,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-04 21:40:20,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2020-09-04 21:40:20,210 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 156 [2020-09-04 21:40:20,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:40:20,210 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2020-09-04 21:40:20,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 21:40:20,211 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2020-09-04 21:40:20,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-04 21:40:20,212 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:40:20,212 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-09-04 21:40:20,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-04 21:40:20,212 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:40:20,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:40:20,213 INFO L82 PathProgramCache]: Analyzing trace with hash 875968193, now seen corresponding path program 35 times [2020-09-04 21:40:20,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:40:20,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [829550443] [2020-09-04 21:40:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:40:20,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:20,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:40:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:20,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:40:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:20,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:20,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:20,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:20,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:20,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:20,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:20,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:20,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:20,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-04 21:40:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:21,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:21,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:21,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 24 proven. 173 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-09-04 21:40:21,248 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [829550443] [2020-09-04 21:40:21,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:40:21,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-04 21:40:21,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139172962] [2020-09-04 21:40:21,249 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-04 21:40:21,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:40:21,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-04 21:40:21,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-09-04 21:40:21,250 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand 28 states. [2020-09-04 21:40:23,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:40:23,252 INFO L93 Difference]: Finished difference Result 91 states and 109 transitions. [2020-09-04 21:40:23,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 21:40:23,254 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-09-04 21:40:23,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:40:23,255 INFO L225 Difference]: With dead ends: 91 [2020-09-04 21:40:23,255 INFO L226 Difference]: Without dead ends: 85 [2020-09-04 21:40:23,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 21:40:23,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-04 21:40:23,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2020-09-04 21:40:23,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-04 21:40:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 98 transitions. [2020-09-04 21:40:23,271 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 98 transitions. Word has length 106 [2020-09-04 21:40:23,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:40:23,271 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 98 transitions. [2020-09-04 21:40:23,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-04 21:40:23,271 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 98 transitions. [2020-09-04 21:40:23,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-04 21:40:23,272 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:40:23,273 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-09-04 21:40:23,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-04 21:40:23,273 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:40:23,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:40:23,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1639794934, now seen corresponding path program 36 times [2020-09-04 21:40:23,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:40:23,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526161360] [2020-09-04 21:40:23,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:40:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:23,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:40:23,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:23,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:40:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:23,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:23,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:23,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:23,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:23,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:24,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-04 21:40:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:24,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:24,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:24,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:24,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:24,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:24,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 39 proven. 293 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2020-09-04 21:40:24,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526161360] [2020-09-04 21:40:24,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:40:24,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-04 21:40:24,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065407676] [2020-09-04 21:40:24,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 21:40:24,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:40:24,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 21:40:24,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2020-09-04 21:40:24,124 INFO L87 Difference]: Start difference. First operand 79 states and 98 transitions. Second operand 23 states. [2020-09-04 21:40:25,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:40:25,742 INFO L93 Difference]: Finished difference Result 91 states and 108 transitions. [2020-09-04 21:40:25,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 21:40:25,744 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 136 [2020-09-04 21:40:25,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:40:25,745 INFO L225 Difference]: With dead ends: 91 [2020-09-04 21:40:25,745 INFO L226 Difference]: Without dead ends: 85 [2020-09-04 21:40:25,746 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=228, Invalid=1664, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 21:40:25,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-04 21:40:25,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2020-09-04 21:40:25,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-04 21:40:25,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 92 transitions. [2020-09-04 21:40:25,761 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 92 transitions. Word has length 136 [2020-09-04 21:40:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:40:25,761 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 92 transitions. [2020-09-04 21:40:25,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 21:40:25,761 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 92 transitions. [2020-09-04 21:40:25,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-04 21:40:25,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:40:25,763 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-09-04 21:40:25,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-04 21:40:25,763 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:40:25,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:40:25,763 INFO L82 PathProgramCache]: Analyzing trace with hash -694861471, now seen corresponding path program 37 times [2020-09-04 21:40:25,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:40:25,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [373296169] [2020-09-04 21:40:25,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:40:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:25,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:40:25,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:25,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:40:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:26,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:26,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 21:40:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:26,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:26,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:26,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:26,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:26,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:26,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:26,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:27,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 26 proven. 264 refuted. 0 times theorem prover too weak. 185 trivial. 0 not checked. [2020-09-04 21:40:27,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [373296169] [2020-09-04 21:40:27,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:40:27,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-04 21:40:27,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529427666] [2020-09-04 21:40:27,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 21:40:27,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:40:27,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 21:40:27,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 21:40:27,281 INFO L87 Difference]: Start difference. First operand 75 states and 92 transitions. Second operand 34 states. [2020-09-04 21:40:30,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:40:30,407 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2020-09-04 21:40:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 21:40:30,409 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 126 [2020-09-04 21:40:30,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:40:30,410 INFO L225 Difference]: With dead ends: 96 [2020-09-04 21:40:30,410 INFO L226 Difference]: Without dead ends: 90 [2020-09-04 21:40:30,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=372, Invalid=3660, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 21:40:30,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-04 21:40:30,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-09-04 21:40:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 21:40:30,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2020-09-04 21:40:30,433 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 126 [2020-09-04 21:40:30,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:40:30,433 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2020-09-04 21:40:30,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 21:40:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2020-09-04 21:40:30,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-04 21:40:30,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:40:30,435 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-09-04 21:40:30,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-09-04 21:40:30,435 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:40:30,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:40:30,436 INFO L82 PathProgramCache]: Analyzing trace with hash -929451146, now seen corresponding path program 38 times [2020-09-04 21:40:30,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:40:30,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494700411] [2020-09-04 21:40:30,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:40:30,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:30,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:40:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:30,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:40:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:30,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:30,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:30,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 21:40:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:30,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:31,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:31,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:31,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:31,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:31,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:31,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:31,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:31,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 44 proven. 315 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-09-04 21:40:31,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494700411] [2020-09-04 21:40:31,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:40:31,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-04 21:40:31,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991870874] [2020-09-04 21:40:31,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 21:40:31,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:40:31,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 21:40:31,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 21:40:31,949 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand 34 states. [2020-09-04 21:40:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:40:35,460 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2020-09-04 21:40:35,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 21:40:35,461 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-09-04 21:40:35,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:40:35,463 INFO L225 Difference]: With dead ends: 100 [2020-09-04 21:40:35,463 INFO L226 Difference]: Without dead ends: 94 [2020-09-04 21:40:35,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=347, Invalid=3685, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 21:40:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-04 21:40:35,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2020-09-04 21:40:35,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 21:40:35,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2020-09-04 21:40:35,483 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 136 [2020-09-04 21:40:35,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:40:35,483 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2020-09-04 21:40:35,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 21:40:35,484 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2020-09-04 21:40:35,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-04 21:40:35,485 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:40:35,485 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-09-04 21:40:35,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-09-04 21:40:35,485 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:40:35,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:40:35,486 INFO L82 PathProgramCache]: Analyzing trace with hash 189825025, now seen corresponding path program 39 times [2020-09-04 21:40:35,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:40:35,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503900370] [2020-09-04 21:40:35,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:40:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:35,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:40:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:35,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:40:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:35,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:35,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:35,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:35,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:35,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:35,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-04 21:40:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:36,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:36,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:36,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:36,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:36,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:36,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:36,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:36,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:36,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:36,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:36,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:36,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:36,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:37,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 48 proven. 375 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-09-04 21:40:37,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503900370] [2020-09-04 21:40:37,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:40:37,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-04 21:40:37,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834022032] [2020-09-04 21:40:37,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 21:40:37,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:40:37,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 21:40:37,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 21:40:37,194 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand 36 states. [2020-09-04 21:40:40,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:40:40,967 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2020-09-04 21:40:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 21:40:40,968 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 146 [2020-09-04 21:40:40,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:40:40,969 INFO L225 Difference]: With dead ends: 100 [2020-09-04 21:40:40,969 INFO L226 Difference]: Without dead ends: 94 [2020-09-04 21:40:40,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=356, Invalid=3934, Unknown=0, NotChecked=0, Total=4290 [2020-09-04 21:40:40,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-04 21:40:40,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2020-09-04 21:40:40,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 21:40:40,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2020-09-04 21:40:40,992 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 146 [2020-09-04 21:40:40,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:40:40,992 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2020-09-04 21:40:40,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 21:40:40,993 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2020-09-04 21:40:40,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-04 21:40:40,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:40:40,994 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-09-04 21:40:40,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-09-04 21:40:40,995 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:40:40,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:40:40,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1186933718, now seen corresponding path program 40 times [2020-09-04 21:40:40,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:40:40,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1847535692] [2020-09-04 21:40:40,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:40:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:41,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:40:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:41,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:40:41,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:41,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:41,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:41,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:41,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:41,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:41,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:41,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 21:40:41,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:41,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:41,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:41,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:42,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:42,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:42,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:42,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:42,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:42,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:42,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:42,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:42,933 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 52 proven. 440 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-09-04 21:40:42,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1847535692] [2020-09-04 21:40:42,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:40:42,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-04 21:40:42,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181691226] [2020-09-04 21:40:42,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 21:40:42,934 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:40:42,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 21:40:42,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 21:40:42,935 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand 38 states. [2020-09-04 21:40:46,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:40:46,806 INFO L93 Difference]: Finished difference Result 100 states and 121 transitions. [2020-09-04 21:40:46,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 21:40:46,808 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 156 [2020-09-04 21:40:46,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:40:46,809 INFO L225 Difference]: With dead ends: 100 [2020-09-04 21:40:46,810 INFO L226 Difference]: Without dead ends: 94 [2020-09-04 21:40:46,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=365, Invalid=4191, Unknown=0, NotChecked=0, Total=4556 [2020-09-04 21:40:46,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-04 21:40:46,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 84. [2020-09-04 21:40:46,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 21:40:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2020-09-04 21:40:46,832 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 156 [2020-09-04 21:40:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:40:46,833 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2020-09-04 21:40:46,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 21:40:46,833 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2020-09-04 21:40:46,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-04 21:40:46,834 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:40:46,835 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-09-04 21:40:46,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-09-04 21:40:46,835 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:40:46,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:40:46,835 INFO L82 PathProgramCache]: Analyzing trace with hash 911087265, now seen corresponding path program 41 times [2020-09-04 21:40:46,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:40:46,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003468440] [2020-09-04 21:40:46,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:40:46,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:46,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:40:46,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:46,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:40:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:47,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:47,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:47,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:47,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:47,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:47,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:47,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:47,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-04 21:40:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:47,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:47,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:47,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:48,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:48,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:48,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:48,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:48,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:48,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:48,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:49,016 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 56 proven. 510 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-09-04 21:40:49,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003468440] [2020-09-04 21:40:49,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:40:49,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 21:40:49,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12046229] [2020-09-04 21:40:49,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 21:40:49,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:40:49,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 21:40:49,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 21:40:49,019 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand 40 states. [2020-09-04 21:40:53,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:40:53,278 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2020-09-04 21:40:53,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 21:40:53,280 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 166 [2020-09-04 21:40:53,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:40:53,281 INFO L225 Difference]: With dead ends: 96 [2020-09-04 21:40:53,281 INFO L226 Difference]: Without dead ends: 90 [2020-09-04 21:40:53,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=374, Invalid=4456, Unknown=0, NotChecked=0, Total=4830 [2020-09-04 21:40:53,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-04 21:40:53,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2020-09-04 21:40:53,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-04 21:40:53,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2020-09-04 21:40:53,299 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 166 [2020-09-04 21:40:53,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:40:53,299 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2020-09-04 21:40:53,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 21:40:53,300 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2020-09-04 21:40:53,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-04 21:40:53,301 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:40:53,301 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-09-04 21:40:53,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-09-04 21:40:53,301 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:40:53,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:40:53,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1055905782, now seen corresponding path program 42 times [2020-09-04 21:40:53,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:40:53,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351216856] [2020-09-04 21:40:53,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:40:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:53,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:40:53,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:53,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:40:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:53,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:53,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:53,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:53,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:53,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:53,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:53,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:54,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:54,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-04 21:40:54,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:54,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:54,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:54,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:54,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 38 proven. 321 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-09-04 21:40:54,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351216856] [2020-09-04 21:40:54,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:40:54,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-04 21:40:54,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855377487] [2020-09-04 21:40:54,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 21:40:54,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:40:54,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 21:40:54,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 21:40:54,902 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand 34 states. [2020-09-04 21:40:58,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:40:58,097 INFO L93 Difference]: Finished difference Result 96 states and 122 transitions. [2020-09-04 21:40:58,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 21:40:58,099 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-09-04 21:40:58,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:40:58,100 INFO L225 Difference]: With dead ends: 96 [2020-09-04 21:40:58,100 INFO L226 Difference]: Without dead ends: 90 [2020-09-04 21:40:58,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=301, Invalid=3005, Unknown=0, NotChecked=0, Total=3306 [2020-09-04 21:40:58,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-04 21:40:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-09-04 21:40:58,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 21:40:58,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 111 transitions. [2020-09-04 21:40:58,116 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 111 transitions. Word has length 136 [2020-09-04 21:40:58,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:40:58,116 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 111 transitions. [2020-09-04 21:40:58,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 21:40:58,116 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 111 transitions. [2020-09-04 21:40:58,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-04 21:40:58,117 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:40:58,117 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-09-04 21:40:58,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-09-04 21:40:58,118 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:40:58,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:40:58,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1891221141, now seen corresponding path program 43 times [2020-09-04 21:40:58,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:40:58,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666073657] [2020-09-04 21:40:58,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:40:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:58,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:40:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:58,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:40:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:58,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:58,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:58,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:58,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:58,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:58,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:58,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:58,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:59,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-04 21:40:59,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:59,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:59,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:59,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:40:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:40:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 33 proven. 267 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-09-04 21:40:59,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666073657] [2020-09-04 21:40:59,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:40:59,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 21:40:59,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768003663] [2020-09-04 21:40:59,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 21:40:59,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:40:59,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 21:40:59,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-09-04 21:40:59,533 INFO L87 Difference]: Start difference. First operand 84 states and 111 transitions. Second operand 32 states. [2020-09-04 21:41:02,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:41:02,501 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2020-09-04 21:41:02,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 21:41:02,505 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-09-04 21:41:02,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:41:02,506 INFO L225 Difference]: With dead ends: 96 [2020-09-04 21:41:02,506 INFO L226 Difference]: Without dead ends: 90 [2020-09-04 21:41:02,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=292, Invalid=2788, Unknown=0, NotChecked=0, Total=3080 [2020-09-04 21:41:02,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-04 21:41:02,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-09-04 21:41:02,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 21:41:02,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 110 transitions. [2020-09-04 21:41:02,521 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 110 transitions. Word has length 126 [2020-09-04 21:41:02,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:41:02,521 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 110 transitions. [2020-09-04 21:41:02,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 21:41:02,521 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 110 transitions. [2020-09-04 21:41:02,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-04 21:41:02,524 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:41:02,525 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-09-04 21:41:02,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-09-04 21:41:02,525 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:41:02,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:41:02,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2058240470, now seen corresponding path program 44 times [2020-09-04 21:41:02,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:41:02,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238740294] [2020-09-04 21:41:02,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:41:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:02,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:41:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:02,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:41:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:02,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:02,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:02,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:02,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:03,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:03,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:03,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:03,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:03,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-04 21:41:03,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:03,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:03,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:03,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:03,776 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 28 proven. 218 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-09-04 21:41:03,776 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238740294] [2020-09-04 21:41:03,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:41:03,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-04 21:41:03,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123403134] [2020-09-04 21:41:03,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-04 21:41:03,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:41:03,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-04 21:41:03,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2020-09-04 21:41:03,777 INFO L87 Difference]: Start difference. First operand 84 states and 110 transitions. Second operand 30 states. [2020-09-04 21:41:06,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:41:06,532 INFO L93 Difference]: Finished difference Result 96 states and 120 transitions. [2020-09-04 21:41:06,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 21:41:06,534 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 116 [2020-09-04 21:41:06,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:41:06,535 INFO L225 Difference]: With dead ends: 96 [2020-09-04 21:41:06,535 INFO L226 Difference]: Without dead ends: 90 [2020-09-04 21:41:06,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=283, Invalid=2579, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 21:41:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-04 21:41:06,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-09-04 21:41:06,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 21:41:06,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 109 transitions. [2020-09-04 21:41:06,550 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 109 transitions. Word has length 116 [2020-09-04 21:41:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:41:06,550 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 109 transitions. [2020-09-04 21:41:06,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-04 21:41:06,550 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 109 transitions. [2020-09-04 21:41:06,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-04 21:41:06,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:41:06,551 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-09-04 21:41:06,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-09-04 21:41:06,552 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:41:06,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:41:06,552 INFO L82 PathProgramCache]: Analyzing trace with hash -2055535082, now seen corresponding path program 45 times [2020-09-04 21:41:06,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:41:06,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956583892] [2020-09-04 21:41:06,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:41:06,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:06,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:41:06,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:06,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:41:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:06,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:06,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:06,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:06,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:06,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:07,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:07,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:07,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:07,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:07,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:07,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-04 21:41:07,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:07,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:07,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:07,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:07,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:07,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:07,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:07,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:07,688 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 48 proven. 412 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2020-09-04 21:41:07,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956583892] [2020-09-04 21:41:07,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:41:07,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-04 21:41:07,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153567623] [2020-09-04 21:41:07,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-04 21:41:07,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:41:07,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-04 21:41:07,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-09-04 21:41:07,690 INFO L87 Difference]: Start difference. First operand 84 states and 109 transitions. Second operand 25 states. [2020-09-04 21:41:09,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:41:09,991 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2020-09-04 21:41:09,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 21:41:09,993 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 156 [2020-09-04 21:41:09,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:41:09,994 INFO L225 Difference]: With dead ends: 96 [2020-09-04 21:41:09,994 INFO L226 Difference]: Without dead ends: 90 [2020-09-04 21:41:09,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=260, Invalid=2092, Unknown=0, NotChecked=0, Total=2352 [2020-09-04 21:41:09,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-04 21:41:10,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-09-04 21:41:10,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 21:41:10,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 108 transitions. [2020-09-04 21:41:10,013 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 108 transitions. Word has length 156 [2020-09-04 21:41:10,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:41:10,014 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 108 transitions. [2020-09-04 21:41:10,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-04 21:41:10,014 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 108 transitions. [2020-09-04 21:41:10,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-04 21:41:10,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:41:10,015 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-09-04 21:41:10,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-09-04 21:41:10,015 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:41:10,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:41:10,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2076600715, now seen corresponding path program 46 times [2020-09-04 21:41:10,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:41:10,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399068613] [2020-09-04 21:41:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:41:10,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:10,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:41:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:10,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:41:10,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:10,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:10,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:10,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:10,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:10,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:10,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:10,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:10,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-04 21:41:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:10,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 2 proven. 175 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2020-09-04 21:41:11,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399068613] [2020-09-04 21:41:11,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:41:11,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-04 21:41:11,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854750397] [2020-09-04 21:41:11,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-04 21:41:11,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:41:11,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-04 21:41:11,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=641, Unknown=0, NotChecked=0, Total=702 [2020-09-04 21:41:11,045 INFO L87 Difference]: Start difference. First operand 84 states and 108 transitions. Second operand 27 states. [2020-09-04 21:41:13,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:41:13,772 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-09-04 21:41:13,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-04 21:41:13,773 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 106 [2020-09-04 21:41:13,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:41:13,775 INFO L225 Difference]: With dead ends: 96 [2020-09-04 21:41:13,775 INFO L226 Difference]: Without dead ends: 90 [2020-09-04 21:41:13,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=271, Invalid=2381, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 21:41:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-04 21:41:13,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-09-04 21:41:13,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 21:41:13,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 107 transitions. [2020-09-04 21:41:13,794 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 107 transitions. Word has length 106 [2020-09-04 21:41:13,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:41:13,794 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 107 transitions. [2020-09-04 21:41:13,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-04 21:41:13,794 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 107 transitions. [2020-09-04 21:41:13,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-04 21:41:13,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:41:13,796 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 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] [2020-09-04 21:41:13,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-09-04 21:41:13,796 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:41:13,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:41:13,796 INFO L82 PathProgramCache]: Analyzing trace with hash 307350582, now seen corresponding path program 47 times [2020-09-04 21:41:13,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:41:13,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862629110] [2020-09-04 21:41:13,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:41:13,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:13,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:41:13,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:13,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:41:13,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:14,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:14,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:14,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:14,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:14,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:14,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:14,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:14,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:14,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-04 21:41:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:14,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:14,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:15,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:15,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:15,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:15,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:15,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:15,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:15,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:15,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:16,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:16,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 60 proven. 585 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-09-04 21:41:16,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862629110] [2020-09-04 21:41:16,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:41:16,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-04 21:41:16,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95503329] [2020-09-04 21:41:16,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 21:41:16,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:41:16,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 21:41:16,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 21:41:16,277 INFO L87 Difference]: Start difference. First operand 84 states and 107 transitions. Second operand 42 states. [2020-09-04 21:41:21,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:41:21,211 INFO L93 Difference]: Finished difference Result 96 states and 117 transitions. [2020-09-04 21:41:21,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 21:41:21,214 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 176 [2020-09-04 21:41:21,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:41:21,216 INFO L225 Difference]: With dead ends: 96 [2020-09-04 21:41:21,216 INFO L226 Difference]: Without dead ends: 90 [2020-09-04 21:41:21,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=383, Invalid=4729, Unknown=0, NotChecked=0, Total=5112 [2020-09-04 21:41:21,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-04 21:41:21,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-09-04 21:41:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 21:41:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 106 transitions. [2020-09-04 21:41:21,236 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 106 transitions. Word has length 176 [2020-09-04 21:41:21,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:41:21,236 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 106 transitions. [2020-09-04 21:41:21,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 21:41:21,236 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 106 transitions. [2020-09-04 21:41:21,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-04 21:41:21,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:41:21,238 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-09-04 21:41:21,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-09-04 21:41:21,238 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:41:21,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:41:21,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1108836021, now seen corresponding path program 48 times [2020-09-04 21:41:21,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:41:21,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914762670] [2020-09-04 21:41:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:41:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:21,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:41:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:21,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:41:21,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:21,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:21,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:21,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:21,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:21,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:21,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:22,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:22,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-04 21:41:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:22,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:22,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:22,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:22,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:22,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:22,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:23,041 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 43 proven. 380 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-09-04 21:41:23,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914762670] [2020-09-04 21:41:23,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:41:23,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-04 21:41:23,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596979469] [2020-09-04 21:41:23,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 21:41:23,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:41:23,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 21:41:23,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 21:41:23,043 INFO L87 Difference]: Start difference. First operand 84 states and 106 transitions. Second operand 36 states. [2020-09-04 21:41:26,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:41:26,544 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2020-09-04 21:41:26,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 21:41:26,546 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 146 [2020-09-04 21:41:26,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:41:26,547 INFO L225 Difference]: With dead ends: 96 [2020-09-04 21:41:26,547 INFO L226 Difference]: Without dead ends: 90 [2020-09-04 21:41:26,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=310, Invalid=3230, Unknown=0, NotChecked=0, Total=3540 [2020-09-04 21:41:26,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-04 21:41:26,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2020-09-04 21:41:26,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-04 21:41:26,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2020-09-04 21:41:26,564 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 146 [2020-09-04 21:41:26,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:41:26,564 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2020-09-04 21:41:26,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 21:41:26,564 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2020-09-04 21:41:26,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-04 21:41:26,565 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:41:26,565 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-09-04 21:41:26,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-09-04 21:41:26,566 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:41:26,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:41:26,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1458252075, now seen corresponding path program 49 times [2020-09-04 21:41:26,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:41:26,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082490543] [2020-09-04 21:41:26,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:41:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:26,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:41:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:26,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:41:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:26,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:26,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:26,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:26,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:27,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:27,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:27,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:27,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:27,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-04 21:41:27,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:27,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:27,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:27,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:27,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:27,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:28,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:28,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:28,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:28,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:28,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:28,848 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 55 proven. 511 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-09-04 21:41:28,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082490543] [2020-09-04 21:41:28,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:41:28,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 21:41:28,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909622011] [2020-09-04 21:41:28,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 21:41:28,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:41:28,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 21:41:28,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 21:41:28,849 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand 40 states. [2020-09-04 21:41:33,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:41:33,036 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2020-09-04 21:41:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 21:41:33,037 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 166 [2020-09-04 21:41:33,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:41:33,039 INFO L225 Difference]: With dead ends: 96 [2020-09-04 21:41:33,039 INFO L226 Difference]: Without dead ends: 90 [2020-09-04 21:41:33,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=351, Invalid=4071, Unknown=0, NotChecked=0, Total=4422 [2020-09-04 21:41:33,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-04 21:41:33,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 80. [2020-09-04 21:41:33,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-04 21:41:33,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2020-09-04 21:41:33,058 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 166 [2020-09-04 21:41:33,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:41:33,059 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2020-09-04 21:41:33,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 21:41:33,059 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2020-09-04 21:41:33,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-04 21:41:33,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:41:33,060 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-09-04 21:41:33,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-09-04 21:41:33,060 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:41:33,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:41:33,061 INFO L82 PathProgramCache]: Analyzing trace with hash 2024502390, now seen corresponding path program 50 times [2020-09-04 21:41:33,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:41:33,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49996675] [2020-09-04 21:41:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:41:33,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:33,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:41:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:33,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:41:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:33,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:33,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:33,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 21:41:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:33,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:33,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:33,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:33,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:33,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:34,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:34,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:34,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:34,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:34,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:34,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:34,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 29 proven. 318 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2020-09-04 21:41:34,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49996675] [2020-09-04 21:41:34,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:41:34,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-04 21:41:34,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346438754] [2020-09-04 21:41:34,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 21:41:34,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:41:34,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 21:41:34,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 21:41:34,984 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand 36 states. [2020-09-04 21:41:39,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:41:39,492 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2020-09-04 21:41:39,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 21:41:39,494 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 136 [2020-09-04 21:41:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:41:39,495 INFO L225 Difference]: With dead ends: 101 [2020-09-04 21:41:39,495 INFO L226 Difference]: Without dead ends: 95 [2020-09-04 21:41:39,496 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=407, Invalid=4285, Unknown=0, NotChecked=0, Total=4692 [2020-09-04 21:41:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-04 21:41:39,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-09-04 21:41:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-04 21:41:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-09-04 21:41:39,519 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 136 [2020-09-04 21:41:39,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:41:39,520 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-09-04 21:41:39,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 21:41:39,520 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-09-04 21:41:39,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-04 21:41:39,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:41:39,521 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-09-04 21:41:39,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-09-04 21:41:39,521 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:41:39,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:41:39,522 INFO L82 PathProgramCache]: Analyzing trace with hash -1005842357, now seen corresponding path program 51 times [2020-09-04 21:41:39,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:41:39,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476042824] [2020-09-04 21:41:39,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:41:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:39,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:41:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:39,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:41:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:39,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:39,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:40,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 21:41:40,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:40,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:40,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:40,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:40,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:40,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:40,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:40,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:40,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:40,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:40,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:40,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:41,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:41,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 49 proven. 374 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-09-04 21:41:41,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476042824] [2020-09-04 21:41:41,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:41:41,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-04 21:41:41,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118933912] [2020-09-04 21:41:41,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 21:41:41,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:41:41,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 21:41:41,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 21:41:41,490 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 36 states. [2020-09-04 21:41:45,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:41:45,973 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2020-09-04 21:41:45,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 21:41:45,975 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 146 [2020-09-04 21:41:45,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:41:45,976 INFO L225 Difference]: With dead ends: 105 [2020-09-04 21:41:45,976 INFO L226 Difference]: Without dead ends: 99 [2020-09-04 21:41:45,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=379, Invalid=4313, Unknown=0, NotChecked=0, Total=4692 [2020-09-04 21:41:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-04 21:41:45,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2020-09-04 21:41:46,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-04 21:41:46,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-09-04 21:41:46,000 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 146 [2020-09-04 21:41:46,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:41:46,001 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-09-04 21:41:46,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 21:41:46,001 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-09-04 21:41:46,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-04 21:41:46,002 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:41:46,002 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-09-04 21:41:46,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-09-04 21:41:46,003 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:41:46,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:41:46,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1310659818, now seen corresponding path program 52 times [2020-09-04 21:41:46,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:41:46,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002000605] [2020-09-04 21:41:46,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:41:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:46,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:41:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:46,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:41:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:46,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:46,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:46,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:46,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-04 21:41:46,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:46,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:46,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:47,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:47,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:47,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:47,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:47,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:47,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:47,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:47,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:48,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:48,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:48,225 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 53 proven. 439 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-09-04 21:41:48,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002000605] [2020-09-04 21:41:48,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:41:48,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-04 21:41:48,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449923645] [2020-09-04 21:41:48,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 21:41:48,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:41:48,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 21:41:48,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 21:41:48,227 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 38 states. [2020-09-04 21:41:53,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:41:53,418 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2020-09-04 21:41:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 21:41:53,420 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 156 [2020-09-04 21:41:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:41:53,421 INFO L225 Difference]: With dead ends: 105 [2020-09-04 21:41:53,422 INFO L226 Difference]: Without dead ends: 99 [2020-09-04 21:41:53,423 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=388, Invalid=4582, Unknown=0, NotChecked=0, Total=4970 [2020-09-04 21:41:53,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-04 21:41:53,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2020-09-04 21:41:53,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-04 21:41:53,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-09-04 21:41:53,441 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 156 [2020-09-04 21:41:53,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:41:53,441 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-09-04 21:41:53,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 21:41:53,441 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-09-04 21:41:53,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-04 21:41:53,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:41:53,443 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-09-04 21:41:53,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-09-04 21:41:53,443 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:41:53,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:41:53,443 INFO L82 PathProgramCache]: Analyzing trace with hash -1585540949, now seen corresponding path program 53 times [2020-09-04 21:41:53,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:41:53,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125098099] [2020-09-04 21:41:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:41:53,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:53,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:41:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:53,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:41:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:53,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:53,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:53,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:53,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:54,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:54,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 21:41:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:54,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:54,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:54,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:54,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:54,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:54,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:55,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:55,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:55,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:55,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:55,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:55,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:41:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:41:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 57 proven. 509 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-09-04 21:41:55,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125098099] [2020-09-04 21:41:55,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:41:55,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 21:41:55,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162852547] [2020-09-04 21:41:55,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 21:41:55,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:41:55,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 21:41:55,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 21:41:55,921 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 40 states. [2020-09-04 21:42:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:42:01,128 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2020-09-04 21:42:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 21:42:01,129 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 166 [2020-09-04 21:42:01,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:42:01,130 INFO L225 Difference]: With dead ends: 105 [2020-09-04 21:42:01,130 INFO L226 Difference]: Without dead ends: 99 [2020-09-04 21:42:01,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=397, Invalid=4859, Unknown=0, NotChecked=0, Total=5256 [2020-09-04 21:42:01,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-04 21:42:01,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2020-09-04 21:42:01,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-04 21:42:01,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-09-04 21:42:01,155 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 166 [2020-09-04 21:42:01,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:42:01,156 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-09-04 21:42:01,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 21:42:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-09-04 21:42:01,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-04 21:42:01,157 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:42:01,157 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 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] [2020-09-04 21:42:01,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-09-04 21:42:01,158 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:42:01,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:42:01,158 INFO L82 PathProgramCache]: Analyzing trace with hash 340441526, now seen corresponding path program 54 times [2020-09-04 21:42:01,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:42:01,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904279260] [2020-09-04 21:42:01,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:42:01,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:01,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:42:01,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:01,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:42:01,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:01,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:01,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:01,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:01,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:01,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:01,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:01,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:02,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-04 21:42:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:02,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:02,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:02,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:02,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:02,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:02,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:02,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:03,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:03,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:03,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:03,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:03,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:03,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 61 proven. 584 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-09-04 21:42:03,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904279260] [2020-09-04 21:42:03,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:42:03,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-04 21:42:03,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550539598] [2020-09-04 21:42:03,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 21:42:03,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:42:03,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 21:42:03,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 21:42:03,931 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 42 states. [2020-09-04 21:42:09,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:42:09,885 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2020-09-04 21:42:09,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 21:42:09,888 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 176 [2020-09-04 21:42:09,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:42:09,889 INFO L225 Difference]: With dead ends: 105 [2020-09-04 21:42:09,889 INFO L226 Difference]: Without dead ends: 99 [2020-09-04 21:42:09,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=406, Invalid=5144, Unknown=0, NotChecked=0, Total=5550 [2020-09-04 21:42:09,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-04 21:42:09,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2020-09-04 21:42:09,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-04 21:42:09,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-09-04 21:42:09,915 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 176 [2020-09-04 21:42:09,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:42:09,915 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-09-04 21:42:09,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 21:42:09,915 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-09-04 21:42:09,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-04 21:42:09,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:42:09,917 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 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] [2020-09-04 21:42:09,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-09-04 21:42:09,917 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:42:09,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:42:09,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1678522635, now seen corresponding path program 55 times [2020-09-04 21:42:09,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:42:09,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202758557] [2020-09-04 21:42:09,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:42:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:10,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:42:10,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:10,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:42:10,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:10,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:10,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:10,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:10,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:10,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:10,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:10,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:10,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:11,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-04 21:42:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:11,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:11,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:11,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:11,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:11,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:12,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:12,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:12,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:12,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:12,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:12,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 65 proven. 664 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-09-04 21:42:13,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202758557] [2020-09-04 21:42:13,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:42:13,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-04 21:42:13,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577485200] [2020-09-04 21:42:13,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 21:42:13,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:42:13,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 21:42:13,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1780, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 21:42:13,072 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 44 states. [2020-09-04 21:42:19,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:42:19,398 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2020-09-04 21:42:19,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 21:42:19,400 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 186 [2020-09-04 21:42:19,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:42:19,401 INFO L225 Difference]: With dead ends: 101 [2020-09-04 21:42:19,402 INFO L226 Difference]: Without dead ends: 95 [2020-09-04 21:42:19,403 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=415, Invalid=5437, Unknown=0, NotChecked=0, Total=5852 [2020-09-04 21:42:19,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-04 21:42:19,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2020-09-04 21:42:19,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-04 21:42:19,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 106 transitions. [2020-09-04 21:42:19,422 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 106 transitions. Word has length 186 [2020-09-04 21:42:19,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:42:19,422 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 106 transitions. [2020-09-04 21:42:19,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 21:42:19,422 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 106 transitions. [2020-09-04 21:42:19,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-04 21:42:19,423 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:42:19,423 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-09-04 21:42:19,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-09-04 21:42:19,423 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:42:19,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:42:19,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1770313057, now seen corresponding path program 56 times [2020-09-04 21:42:19,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:42:19,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676609746] [2020-09-04 21:42:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:42:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:19,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:42:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:19,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:42:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:19,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:19,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:19,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:19,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:19,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:19,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:20,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:20,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:20,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:20,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:20,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-04 21:42:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:20,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:20,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:20,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:21,089 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 32 proven. 268 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-09-04 21:42:21,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676609746] [2020-09-04 21:42:21,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:42:21,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 21:42:21,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067527498] [2020-09-04 21:42:21,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 21:42:21,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:42:21,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 21:42:21,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-09-04 21:42:21,090 INFO L87 Difference]: Start difference. First operand 85 states and 106 transitions. Second operand 32 states. [2020-09-04 21:42:24,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:42:24,877 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2020-09-04 21:42:24,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 21:42:24,880 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-09-04 21:42:24,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:42:24,881 INFO L225 Difference]: With dead ends: 101 [2020-09-04 21:42:24,881 INFO L226 Difference]: Without dead ends: 95 [2020-09-04 21:42:24,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=315, Invalid=3107, Unknown=0, NotChecked=0, Total=3422 [2020-09-04 21:42:24,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-04 21:42:24,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-09-04 21:42:24,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-04 21:42:24,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2020-09-04 21:42:24,898 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 126 [2020-09-04 21:42:24,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:42:24,898 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2020-09-04 21:42:24,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 21:42:24,898 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2020-09-04 21:42:24,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-04 21:42:24,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:42:24,899 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-09-04 21:42:24,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-09-04 21:42:24,899 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:42:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:42:24,899 INFO L82 PathProgramCache]: Analyzing trace with hash -487924010, now seen corresponding path program 57 times [2020-09-04 21:42:24,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:42:24,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197045155] [2020-09-04 21:42:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:42:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:25,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:42:25,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:25,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:42:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:25,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:25,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:25,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:25,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:25,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:25,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:25,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:26,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-04 21:42:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:26,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:26,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:26,355 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 2 proven. 220 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2020-09-04 21:42:26,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197045155] [2020-09-04 21:42:26,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:42:26,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-04 21:42:26,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784454856] [2020-09-04 21:42:26,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-04 21:42:26,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:42:26,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-04 21:42:26,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=746, Unknown=0, NotChecked=0, Total=812 [2020-09-04 21:42:26,356 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand 29 states. [2020-09-04 21:42:30,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:42:30,027 INFO L93 Difference]: Finished difference Result 101 states and 129 transitions. [2020-09-04 21:42:30,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-04 21:42:30,027 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 116 [2020-09-04 21:42:30,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:42:30,028 INFO L225 Difference]: With dead ends: 101 [2020-09-04 21:42:30,029 INFO L226 Difference]: Without dead ends: 95 [2020-09-04 21:42:30,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=303, Invalid=2889, Unknown=0, NotChecked=0, Total=3192 [2020-09-04 21:42:30,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-04 21:42:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-09-04 21:42:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-04 21:42:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2020-09-04 21:42:30,049 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 116 [2020-09-04 21:42:30,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:42:30,050 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2020-09-04 21:42:30,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-04 21:42:30,050 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2020-09-04 21:42:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-09-04 21:42:30,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:42:30,051 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 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] [2020-09-04 21:42:30,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-09-04 21:42:30,052 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:42:30,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:42:30,052 INFO L82 PathProgramCache]: Analyzing trace with hash 453697622, now seen corresponding path program 58 times [2020-09-04 21:42:30,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:42:30,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732071662] [2020-09-04 21:42:30,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:42:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:30,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:42:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:30,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:42:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:30,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:30,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:30,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:30,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:30,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:30,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:30,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:30,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:31,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:31,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-04 21:42:31,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:31,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:31,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:32,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:32,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:32,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:32,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:32,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:32,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:32,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:33,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:33,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:33,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:33,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 69 proven. 749 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2020-09-04 21:42:33,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732071662] [2020-09-04 21:42:33,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:42:33,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-09-04 21:42:33,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792472858] [2020-09-04 21:42:33,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-04 21:42:33,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:42:33,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-04 21:42:33,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1953, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 21:42:33,748 INFO L87 Difference]: Start difference. First operand 89 states and 118 transitions. Second operand 46 states. [2020-09-04 21:42:41,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:42:41,222 INFO L93 Difference]: Finished difference Result 101 states and 128 transitions. [2020-09-04 21:42:41,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 21:42:41,225 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 196 [2020-09-04 21:42:41,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:42:41,226 INFO L225 Difference]: With dead ends: 101 [2020-09-04 21:42:41,226 INFO L226 Difference]: Without dead ends: 95 [2020-09-04 21:42:41,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=424, Invalid=5738, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 21:42:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-04 21:42:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-09-04 21:42:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-04 21:42:41,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 117 transitions. [2020-09-04 21:42:41,242 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 117 transitions. Word has length 196 [2020-09-04 21:42:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:42:41,242 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 117 transitions. [2020-09-04 21:42:41,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-04 21:42:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 117 transitions. [2020-09-04 21:42:41,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-04 21:42:41,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:42:41,244 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-09-04 21:42:41,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-09-04 21:42:41,244 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:42:41,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:42:41,245 INFO L82 PathProgramCache]: Analyzing trace with hash 315373569, now seen corresponding path program 59 times [2020-09-04 21:42:41,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:42:41,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40851702] [2020-09-04 21:42:41,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:42:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:41,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:42:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:41,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:42:41,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:41,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:41,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:41,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:41,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:41,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:41,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:41,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:42,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:42,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:42,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-04 21:42:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:42,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:42,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:43,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:43,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:43,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 42 proven. 381 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-09-04 21:42:43,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40851702] [2020-09-04 21:42:43,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:42:43,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-04 21:42:43,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040301618] [2020-09-04 21:42:43,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 21:42:43,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:42:43,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 21:42:43,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 21:42:43,466 INFO L87 Difference]: Start difference. First operand 89 states and 117 transitions. Second operand 36 states. [2020-09-04 21:42:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:42:47,838 INFO L93 Difference]: Finished difference Result 101 states and 127 transitions. [2020-09-04 21:42:47,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 21:42:47,840 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 146 [2020-09-04 21:42:47,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:42:47,841 INFO L225 Difference]: With dead ends: 101 [2020-09-04 21:42:47,841 INFO L226 Difference]: Without dead ends: 95 [2020-09-04 21:42:47,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=333, Invalid=3573, Unknown=0, NotChecked=0, Total=3906 [2020-09-04 21:42:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-04 21:42:47,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-09-04 21:42:47,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-04 21:42:47,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 116 transitions. [2020-09-04 21:42:47,863 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 116 transitions. Word has length 146 [2020-09-04 21:42:47,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:42:47,864 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 116 transitions. [2020-09-04 21:42:47,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 21:42:47,864 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 116 transitions. [2020-09-04 21:42:47,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-04 21:42:47,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:42:47,865 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-09-04 21:42:47,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-09-04 21:42:47,865 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:42:47,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:42:47,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1787944138, now seen corresponding path program 60 times [2020-09-04 21:42:47,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:42:47,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733050648] [2020-09-04 21:42:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:42:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:47,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:42:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:47,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:42:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:48,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:48,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:48,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:48,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:48,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:48,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:48,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:48,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:48,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:49,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-04 21:42:49,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:49,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:49,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:49,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:49,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 37 proven. 322 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-09-04 21:42:49,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733050648] [2020-09-04 21:42:49,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:42:49,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-04 21:42:49,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527478440] [2020-09-04 21:42:49,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 21:42:49,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:42:49,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 21:42:49,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 21:42:49,879 INFO L87 Difference]: Start difference. First operand 89 states and 116 transitions. Second operand 34 states. [2020-09-04 21:42:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:42:54,260 INFO L93 Difference]: Finished difference Result 101 states and 126 transitions. [2020-09-04 21:42:54,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 21:42:54,262 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-09-04 21:42:54,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:42:54,264 INFO L225 Difference]: With dead ends: 101 [2020-09-04 21:42:54,264 INFO L226 Difference]: Without dead ends: 95 [2020-09-04 21:42:54,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=324, Invalid=3336, Unknown=0, NotChecked=0, Total=3660 [2020-09-04 21:42:54,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-04 21:42:54,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-09-04 21:42:54,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-04 21:42:54,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 115 transitions. [2020-09-04 21:42:54,285 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 115 transitions. Word has length 136 [2020-09-04 21:42:54,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:42:54,285 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 115 transitions. [2020-09-04 21:42:54,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 21:42:54,285 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 115 transitions. [2020-09-04 21:42:54,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-04 21:42:54,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:42:54,286 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-09-04 21:42:54,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-09-04 21:42:54,286 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:42:54,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:42:54,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1174801759, now seen corresponding path program 61 times [2020-09-04 21:42:54,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:42:54,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566592221] [2020-09-04 21:42:54,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:42:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:54,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:42:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:54,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:42:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:54,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:54,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:54,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:54,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:54,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:55,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:55,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:55,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:55,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-04 21:42:55,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:55,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:55,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:56,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:56,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:56,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:56,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:57,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:42:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:42:57,242 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 52 proven. 514 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-09-04 21:42:57,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566592221] [2020-09-04 21:42:57,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:42:57,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 21:42:57,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104093560] [2020-09-04 21:42:57,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 21:42:57,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:42:57,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 21:42:57,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 21:42:57,243 INFO L87 Difference]: Start difference. First operand 89 states and 115 transitions. Second operand 40 states. [2020-09-04 21:43:02,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:43:02,338 INFO L93 Difference]: Finished difference Result 101 states and 125 transitions. [2020-09-04 21:43:02,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 21:43:02,341 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 166 [2020-09-04 21:43:02,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:43:02,342 INFO L225 Difference]: With dead ends: 101 [2020-09-04 21:43:02,342 INFO L226 Difference]: Without dead ends: 95 [2020-09-04 21:43:02,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=351, Invalid=4071, Unknown=0, NotChecked=0, Total=4422 [2020-09-04 21:43:02,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-04 21:43:02,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-09-04 21:43:02,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-04 21:43:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2020-09-04 21:43:02,364 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 166 [2020-09-04 21:43:02,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:43:02,365 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2020-09-04 21:43:02,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 21:43:02,365 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2020-09-04 21:43:02,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-04 21:43:02,366 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:43:02,366 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-09-04 21:43:02,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-09-04 21:43:02,366 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:43:02,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:43:02,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1751085162, now seen corresponding path program 62 times [2020-09-04 21:43:02,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:43:02,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817780865] [2020-09-04 21:43:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:43:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:02,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:43:02,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:02,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:43:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:02,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:02,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:02,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:02,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:03,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:03,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:03,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:03,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:03,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-04 21:43:03,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:03,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:04,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:04,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:04,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:04,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:04,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 47 proven. 445 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-09-04 21:43:04,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817780865] [2020-09-04 21:43:04,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:43:04,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-04 21:43:04,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612036657] [2020-09-04 21:43:04,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 21:43:04,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:43:04,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 21:43:04,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 21:43:04,995 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand 38 states. [2020-09-04 21:43:10,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:43:10,336 INFO L93 Difference]: Finished difference Result 101 states and 124 transitions. [2020-09-04 21:43:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 21:43:10,339 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 156 [2020-09-04 21:43:10,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:43:10,340 INFO L225 Difference]: With dead ends: 101 [2020-09-04 21:43:10,341 INFO L226 Difference]: Without dead ends: 95 [2020-09-04 21:43:10,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=342, Invalid=3818, Unknown=0, NotChecked=0, Total=4160 [2020-09-04 21:43:10,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-04 21:43:10,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-09-04 21:43:10,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-04 21:43:10,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2020-09-04 21:43:10,358 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 156 [2020-09-04 21:43:10,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:43:10,358 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2020-09-04 21:43:10,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 21:43:10,358 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2020-09-04 21:43:10,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-04 21:43:10,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:43:10,360 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 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] [2020-09-04 21:43:10,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-09-04 21:43:10,360 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:43:10,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:43:10,360 INFO L82 PathProgramCache]: Analyzing trace with hash 853550070, now seen corresponding path program 63 times [2020-09-04 21:43:10,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:43:10,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245840084] [2020-09-04 21:43:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:43:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:10,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:43:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:10,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:43:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:10,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:10,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:10,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:10,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:11,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:11,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:11,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:11,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:11,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:11,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-04 21:43:11,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:11,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:11,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:11,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:11,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:11,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:11,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:12,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:12,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 57 proven. 551 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-09-04 21:43:12,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245840084] [2020-09-04 21:43:12,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:43:12,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-04 21:43:12,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770231521] [2020-09-04 21:43:12,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-04 21:43:12,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:43:12,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-04 21:43:12,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2020-09-04 21:43:12,170 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand 27 states. [2020-09-04 21:43:15,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:43:15,568 INFO L93 Difference]: Finished difference Result 101 states and 123 transitions. [2020-09-04 21:43:15,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 21:43:15,571 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 176 [2020-09-04 21:43:15,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:43:15,572 INFO L225 Difference]: With dead ends: 101 [2020-09-04 21:43:15,572 INFO L226 Difference]: Without dead ends: 95 [2020-09-04 21:43:15,573 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=292, Invalid=2570, Unknown=0, NotChecked=0, Total=2862 [2020-09-04 21:43:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-04 21:43:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 89. [2020-09-04 21:43:15,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-04 21:43:15,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 112 transitions. [2020-09-04 21:43:15,595 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 112 transitions. Word has length 176 [2020-09-04 21:43:15,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:43:15,595 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 112 transitions. [2020-09-04 21:43:15,596 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-04 21:43:15,596 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 112 transitions. [2020-09-04 21:43:15,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-04 21:43:15,597 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:43:15,597 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 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] [2020-09-04 21:43:15,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-09-04 21:43:15,598 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:43:15,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:43:15,598 INFO L82 PathProgramCache]: Analyzing trace with hash -181402303, now seen corresponding path program 64 times [2020-09-04 21:43:15,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:43:15,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190983102] [2020-09-04 21:43:15,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:43:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:15,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:43:15,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:15,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:43:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:15,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:16,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:16,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:16,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:16,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:16,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:16,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:16,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:17,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:17,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-04 21:43:17,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:17,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:17,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:17,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:18,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:18,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:18,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:18,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:18,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:19,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:19,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:19,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 64 proven. 665 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-09-04 21:43:19,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190983102] [2020-09-04 21:43:19,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:43:19,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-04 21:43:19,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450672140] [2020-09-04 21:43:19,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 21:43:19,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:43:19,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 21:43:19,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1780, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 21:43:19,543 INFO L87 Difference]: Start difference. First operand 89 states and 112 transitions. Second operand 44 states. [2020-09-04 21:43:26,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:43:26,866 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2020-09-04 21:43:26,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 21:43:26,866 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 186 [2020-09-04 21:43:26,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:43:26,867 INFO L225 Difference]: With dead ends: 101 [2020-09-04 21:43:26,867 INFO L226 Difference]: Without dead ends: 95 [2020-09-04 21:43:26,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=392, Invalid=5010, Unknown=0, NotChecked=0, Total=5402 [2020-09-04 21:43:26,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-04 21:43:26,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2020-09-04 21:43:26,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-04 21:43:26,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 106 transitions. [2020-09-04 21:43:26,890 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 106 transitions. Word has length 186 [2020-09-04 21:43:26,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:43:26,891 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 106 transitions. [2020-09-04 21:43:26,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 21:43:26,891 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 106 transitions. [2020-09-04 21:43:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-04 21:43:26,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:43:26,892 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-09-04 21:43:26,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-09-04 21:43:26,892 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:43:26,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:43:26,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1235115009, now seen corresponding path program 65 times [2020-09-04 21:43:26,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:43:26,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457956467] [2020-09-04 21:43:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:43:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:27,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:43:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:27,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:43:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:27,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:27,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 21:43:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:27,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:27,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:27,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:27,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:28,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:28,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:28,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:28,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:28,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:28,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:29,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:29,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:29,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:29,747 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 32 proven. 377 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2020-09-04 21:43:29,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457956467] [2020-09-04 21:43:29,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:43:29,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-04 21:43:29,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143524900] [2020-09-04 21:43:29,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 21:43:29,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:43:29,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 21:43:29,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 21:43:29,748 INFO L87 Difference]: Start difference. First operand 85 states and 106 transitions. Second operand 38 states. [2020-09-04 21:43:35,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:43:35,954 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2020-09-04 21:43:35,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-04 21:43:35,957 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 146 [2020-09-04 21:43:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:43:35,959 INFO L225 Difference]: With dead ends: 106 [2020-09-04 21:43:35,959 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 21:43:35,960 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=442, Invalid=4960, Unknown=0, NotChecked=0, Total=5402 [2020-09-04 21:43:35,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 21:43:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-09-04 21:43:35,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 21:43:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-09-04 21:43:35,985 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 146 [2020-09-04 21:43:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:43:35,985 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-09-04 21:43:35,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 21:43:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-09-04 21:43:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-04 21:43:35,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:43:35,987 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-09-04 21:43:35,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-09-04 21:43:35,987 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:43:35,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:43:35,987 INFO L82 PathProgramCache]: Analyzing trace with hash 931262870, now seen corresponding path program 66 times [2020-09-04 21:43:35,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:43:35,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681109579] [2020-09-04 21:43:35,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:43:36,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:36,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:43:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:36,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:43:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:36,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:36,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:36,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 21:43:36,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:36,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:36,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:36,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:37,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:37,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:37,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:37,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:37,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:37,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:38,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:38,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:38,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:38,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:38,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 54 proven. 438 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-09-04 21:43:39,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681109579] [2020-09-04 21:43:39,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:43:39,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-04 21:43:39,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525107684] [2020-09-04 21:43:39,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 21:43:39,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:43:39,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 21:43:39,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 21:43:39,153 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 38 states. [2020-09-04 21:43:46,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:43:46,422 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2020-09-04 21:43:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-04 21:43:46,425 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 156 [2020-09-04 21:43:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:43:46,427 INFO L225 Difference]: With dead ends: 110 [2020-09-04 21:43:46,427 INFO L226 Difference]: Without dead ends: 104 [2020-09-04 21:43:46,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=411, Invalid=4991, Unknown=0, NotChecked=0, Total=5402 [2020-09-04 21:43:46,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-04 21:43:46,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-09-04 21:43:46,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 21:43:46,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-09-04 21:43:46,462 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 156 [2020-09-04 21:43:46,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:43:46,462 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-09-04 21:43:46,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 21:43:46,462 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-09-04 21:43:46,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-04 21:43:46,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:43:46,464 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-09-04 21:43:46,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-09-04 21:43:46,464 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:43:46,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:43:46,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1108866399, now seen corresponding path program 67 times [2020-09-04 21:43:46,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:43:46,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693340876] [2020-09-04 21:43:46,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:43:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:46,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:43:46,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:46,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:43:46,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:46,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:46,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:47,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:47,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-04 21:43:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:47,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:47,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:47,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:47,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:48,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:48,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:48,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:48,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:48,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:48,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:48,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:49,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:49,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:49,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:49,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 58 proven. 508 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-09-04 21:43:49,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693340876] [2020-09-04 21:43:49,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:43:49,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 21:43:49,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662442798] [2020-09-04 21:43:49,908 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 21:43:49,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:43:49,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 21:43:49,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 21:43:49,908 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 40 states. [2020-09-04 21:43:57,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:43:57,656 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2020-09-04 21:43:57,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-04 21:43:57,660 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 166 [2020-09-04 21:43:57,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:43:57,661 INFO L225 Difference]: With dead ends: 110 [2020-09-04 21:43:57,661 INFO L226 Difference]: Without dead ends: 104 [2020-09-04 21:43:57,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=420, Invalid=5280, Unknown=0, NotChecked=0, Total=5700 [2020-09-04 21:43:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-04 21:43:57,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-09-04 21:43:57,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 21:43:57,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-09-04 21:43:57,694 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 166 [2020-09-04 21:43:57,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:43:57,694 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-09-04 21:43:57,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 21:43:57,695 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-09-04 21:43:57,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-04 21:43:57,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:43:57,697 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 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] [2020-09-04 21:43:57,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-09-04 21:43:57,697 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:43:57,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:43:57,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1651017226, now seen corresponding path program 68 times [2020-09-04 21:43:57,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:43:57,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259986648] [2020-09-04 21:43:57,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:43:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:57,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:43:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:57,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:43:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:58,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:58,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:58,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:58,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:58,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:58,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:58,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:58,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 21:43:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:58,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:58,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:59,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:59,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:59,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:59,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:43:59,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:43:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:00,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:00,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:00,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:01,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 62 proven. 583 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-09-04 21:44:01,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259986648] [2020-09-04 21:44:01,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:44:01,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-04 21:44:01,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565162514] [2020-09-04 21:44:01,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 21:44:01,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:44:01,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 21:44:01,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 21:44:01,454 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 42 states. [2020-09-04 21:44:10,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:44:10,410 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2020-09-04 21:44:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-04 21:44:10,414 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 176 [2020-09-04 21:44:10,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:44:10,415 INFO L225 Difference]: With dead ends: 110 [2020-09-04 21:44:10,415 INFO L226 Difference]: Without dead ends: 104 [2020-09-04 21:44:10,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=429, Invalid=5577, Unknown=0, NotChecked=0, Total=6006 [2020-09-04 21:44:10,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-04 21:44:10,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-09-04 21:44:10,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 21:44:10,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-09-04 21:44:10,438 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 176 [2020-09-04 21:44:10,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:44:10,439 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-09-04 21:44:10,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 21:44:10,439 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-09-04 21:44:10,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-04 21:44:10,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:44:10,440 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 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] [2020-09-04 21:44:10,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-09-04 21:44:10,440 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:44:10,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:44:10,440 INFO L82 PathProgramCache]: Analyzing trace with hash 131600705, now seen corresponding path program 69 times [2020-09-04 21:44:10,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:44:10,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019029524] [2020-09-04 21:44:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:44:10,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:10,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:44:10,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:10,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:44:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:10,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:10,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:10,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:10,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:11,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:11,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:11,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-04 21:44:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:11,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:12,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:12,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:12,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:12,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:12,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:12,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:12,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:13,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:13,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:13,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:13,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:13,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:14,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 66 proven. 663 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-09-04 21:44:14,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019029524] [2020-09-04 21:44:14,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:44:14,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-04 21:44:14,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385180054] [2020-09-04 21:44:14,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 21:44:14,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:44:14,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 21:44:14,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1780, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 21:44:14,596 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 44 states. [2020-09-04 21:44:23,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:44:23,868 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2020-09-04 21:44:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-04 21:44:23,872 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 186 [2020-09-04 21:44:23,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:44:23,874 INFO L225 Difference]: With dead ends: 110 [2020-09-04 21:44:23,874 INFO L226 Difference]: Without dead ends: 104 [2020-09-04 21:44:23,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=438, Invalid=5882, Unknown=0, NotChecked=0, Total=6320 [2020-09-04 21:44:23,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-04 21:44:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-09-04 21:44:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 21:44:23,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-09-04 21:44:23,904 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 186 [2020-09-04 21:44:23,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:44:23,904 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-09-04 21:44:23,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 21:44:23,904 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-09-04 21:44:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-09-04 21:44:23,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:44:23,906 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 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] [2020-09-04 21:44:23,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-09-04 21:44:23,906 INFO L427 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:44:23,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:44:23,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1056320086, now seen corresponding path program 70 times [2020-09-04 21:44:23,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:44:23,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865459820] [2020-09-04 21:44:23,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:44:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:24,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:44:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:24,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:44:24,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:24,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:24,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:24,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:24,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:24,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:24,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:25,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:25,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-04 21:44:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:25,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:25,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:26,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:26,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:26,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:26,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:26,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:27,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:27,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:27,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:27,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:28,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:28,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 70 proven. 748 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2020-09-04 21:44:28,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865459820] [2020-09-04 21:44:28,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:44:28,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-09-04 21:44:28,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336278429] [2020-09-04 21:44:28,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-04 21:44:28,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:44:28,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-04 21:44:28,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1953, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 21:44:28,600 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 46 states. [2020-09-04 21:44:38,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:44:38,884 INFO L93 Difference]: Finished difference Result 110 states and 135 transitions. [2020-09-04 21:44:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-04 21:44:38,889 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 196 [2020-09-04 21:44:38,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:44:38,890 INFO L225 Difference]: With dead ends: 110 [2020-09-04 21:44:38,890 INFO L226 Difference]: Without dead ends: 104 [2020-09-04 21:44:38,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=447, Invalid=6195, Unknown=0, NotChecked=0, Total=6642 [2020-09-04 21:44:38,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-04 21:44:38,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 94. [2020-09-04 21:44:38,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 21:44:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-09-04 21:44:38,924 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 196 [2020-09-04 21:44:38,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:44:38,924 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-09-04 21:44:38,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-04 21:44:38,924 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-09-04 21:44:38,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-09-04 21:44:38,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:44:38,925 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 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] [2020-09-04 21:44:38,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-09-04 21:44:38,926 INFO L427 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:44:38,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:44:38,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1609535519, now seen corresponding path program 71 times [2020-09-04 21:44:38,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:44:38,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782725378] [2020-09-04 21:44:38,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:44:38,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:39,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:44:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:39,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:44:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:39,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:39,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:39,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:39,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:39,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:39,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:39,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:39,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:40,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:40,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:40,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:40,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:40,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-04 21:44:40,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:41,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:41,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:41,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:41,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:42,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:42,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:42,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:43,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:43,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:43,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:43,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:44,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:44,668 INFO L134 CoverageAnalysis]: Checked inductivity of 1571 backedges. 74 proven. 838 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-09-04 21:44:44,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782725378] [2020-09-04 21:44:44,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:44:44,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-09-04 21:44:44,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988752034] [2020-09-04 21:44:44,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-04 21:44:44,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:44:44,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-04 21:44:44,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2134, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 21:44:44,671 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 48 states. [2020-09-04 21:44:56,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:44:56,423 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2020-09-04 21:44:56,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-04 21:44:56,427 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 206 [2020-09-04 21:44:56,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:44:56,428 INFO L225 Difference]: With dead ends: 106 [2020-09-04 21:44:56,428 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 21:44:56,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1076 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=456, Invalid=6516, Unknown=0, NotChecked=0, Total=6972 [2020-09-04 21:44:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 21:44:56,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2020-09-04 21:44:56,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-04 21:44:56,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-09-04 21:44:56,452 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 206 [2020-09-04 21:44:56,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:44:56,452 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-09-04 21:44:56,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-09-04 21:44:56,452 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-09-04 21:44:56,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-04 21:44:56,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:44:56,454 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 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] [2020-09-04 21:44:56,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-09-04 21:44:56,454 INFO L427 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:44:56,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:44:56,454 INFO L82 PathProgramCache]: Analyzing trace with hash -477577610, now seen corresponding path program 72 times [2020-09-04 21:44:56,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:44:56,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724030742] [2020-09-04 21:44:56,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:44:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:56,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:44:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:56,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:44:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:56,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:56,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:56,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:57,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:57,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:57,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:57,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:57,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:57,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:57,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:58,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:58,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:58,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-04 21:44:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:58,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:59,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:59,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:44:59,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:44:59,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:00,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:00,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 56 proven. 589 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-09-04 21:45:00,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724030742] [2020-09-04 21:45:00,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:45:00,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-04 21:45:00,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813315992] [2020-09-04 21:45:00,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 21:45:00,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:45:00,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 21:45:00,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 21:45:00,848 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 42 states. [2020-09-04 21:45:05,037 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:45:10,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:45:10,015 INFO L93 Difference]: Finished difference Result 106 states and 138 transitions. [2020-09-04 21:45:10,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 21:45:10,019 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 176 [2020-09-04 21:45:10,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:45:10,021 INFO L225 Difference]: With dead ends: 106 [2020-09-04 21:45:10,021 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 21:45:10,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=383, Invalid=4729, Unknown=0, NotChecked=0, Total=5112 [2020-09-04 21:45:10,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 21:45:10,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-09-04 21:45:10,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 21:45:10,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2020-09-04 21:45:10,052 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 176 [2020-09-04 21:45:10,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:45:10,052 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2020-09-04 21:45:10,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 21:45:10,052 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2020-09-04 21:45:10,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-04 21:45:10,053 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:45:10,053 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 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] [2020-09-04 21:45:10,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-09-04 21:45:10,053 INFO L427 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:45:10,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:45:10,053 INFO L82 PathProgramCache]: Analyzing trace with hash 2130045323, now seen corresponding path program 73 times [2020-09-04 21:45:10,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:45:10,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993167534] [2020-09-04 21:45:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:45:10,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:10,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:45:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:10,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:45:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:10,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:10,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:10,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:10,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:10,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:11,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:11,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:11,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:12,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:12,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-04 21:45:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:12,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:12,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:12,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:13,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:13,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:13,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:13,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:13,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:14,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:14,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:14,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 61 proven. 668 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-09-04 21:45:14,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993167534] [2020-09-04 21:45:14,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:45:14,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-04 21:45:14,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424054260] [2020-09-04 21:45:14,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 21:45:14,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:45:14,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 21:45:14,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1780, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 21:45:14,978 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand 44 states. [2020-09-04 21:45:21,240 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:45:26,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:45:26,669 INFO L93 Difference]: Finished difference Result 106 states and 137 transitions. [2020-09-04 21:45:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 21:45:26,674 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 186 [2020-09-04 21:45:26,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:45:26,676 INFO L225 Difference]: With dead ends: 106 [2020-09-04 21:45:26,676 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 21:45:26,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=392, Invalid=5010, Unknown=0, NotChecked=0, Total=5402 [2020-09-04 21:45:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 21:45:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-09-04 21:45:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 21:45:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2020-09-04 21:45:26,695 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 126 transitions. Word has length 186 [2020-09-04 21:45:26,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:45:26,695 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 126 transitions. [2020-09-04 21:45:26,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 21:45:26,695 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 126 transitions. [2020-09-04 21:45:26,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-09-04 21:45:26,696 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:45:26,696 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 11, 11, 11, 11, 11, 11, 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] [2020-09-04 21:45:26,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-09-04 21:45:26,696 INFO L427 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:45:26,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:45:26,696 INFO L82 PathProgramCache]: Analyzing trace with hash -2107579957, now seen corresponding path program 74 times [2020-09-04 21:45:26,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:45:26,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977447696] [2020-09-04 21:45:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:45:26,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:26,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:45:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:26,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:45:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:27,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:27,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:27,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:27,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:27,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:28,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:28,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:28,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:28,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:29,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-04 21:45:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:29,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:29,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:29,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:30,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 41 proven. 382 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2020-09-04 21:45:30,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977447696] [2020-09-04 21:45:30,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:45:30,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-04 21:45:30,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744311410] [2020-09-04 21:45:30,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-04 21:45:30,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:45:30,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-04 21:45:30,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1168, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 21:45:30,236 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand 36 states. [2020-09-04 21:45:39,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:45:39,155 INFO L93 Difference]: Finished difference Result 106 states and 136 transitions. [2020-09-04 21:45:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 21:45:39,161 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 146 [2020-09-04 21:45:39,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:45:39,162 INFO L225 Difference]: With dead ends: 106 [2020-09-04 21:45:39,162 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 21:45:39,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=356, Invalid=3934, Unknown=0, NotChecked=0, Total=4290 [2020-09-04 21:45:39,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 21:45:39,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-09-04 21:45:39,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 21:45:39,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 125 transitions. [2020-09-04 21:45:39,189 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 125 transitions. Word has length 146 [2020-09-04 21:45:39,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:45:39,189 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 125 transitions. [2020-09-04 21:45:39,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-04 21:45:39,189 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 125 transitions. [2020-09-04 21:45:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-09-04 21:45:39,190 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:45:39,190 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 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] [2020-09-04 21:45:39,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-09-04 21:45:39,190 INFO L427 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:45:39,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:45:39,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1802303125, now seen corresponding path program 75 times [2020-09-04 21:45:39,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:45:39,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648810306] [2020-09-04 21:45:39,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:45:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:39,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:45:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:39,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:45:39,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:39,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:39,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:39,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:40,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:40,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:40,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:40,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:40,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:41,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:41,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-04 21:45:41,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:41,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:41,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:42,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:42,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:42,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:43,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:43,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:43,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:43,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:44,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:44,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:45,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:45,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1571 backedges. 73 proven. 839 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-09-04 21:45:45,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648810306] [2020-09-04 21:45:45,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:45:45,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-09-04 21:45:45,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047834708] [2020-09-04 21:45:45,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-04 21:45:45,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:45:45,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-04 21:45:45,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2134, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 21:45:45,543 INFO L87 Difference]: Start difference. First operand 94 states and 125 transitions. Second operand 48 states. [2020-09-04 21:45:47,761 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-09-04 21:45:59,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:45:59,574 INFO L93 Difference]: Finished difference Result 106 states and 135 transitions. [2020-09-04 21:45:59,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 21:45:59,579 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 206 [2020-09-04 21:45:59,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:45:59,580 INFO L225 Difference]: With dead ends: 106 [2020-09-04 21:45:59,580 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 21:45:59,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=433, Invalid=6047, Unknown=0, NotChecked=0, Total=6480 [2020-09-04 21:45:59,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 21:45:59,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-09-04 21:45:59,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 21:45:59,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 124 transitions. [2020-09-04 21:45:59,600 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 124 transitions. Word has length 206 [2020-09-04 21:45:59,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:45:59,600 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 124 transitions. [2020-09-04 21:45:59,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-09-04 21:45:59,600 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 124 transitions. [2020-09-04 21:45:59,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-09-04 21:45:59,601 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:45:59,601 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 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] [2020-09-04 21:45:59,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-09-04 21:45:59,602 INFO L427 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:45:59,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:45:59,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1493433674, now seen corresponding path program 76 times [2020-09-04 21:45:59,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:45:59,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415818864] [2020-09-04 21:45:59,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:45:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:59,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:45:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:59,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:45:59,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:45:59,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:45:59,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:00,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:00,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:00,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:00,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:00,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:00,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:01,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:01,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:01,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:01,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-04 21:46:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:02,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:02,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:02,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:03,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:03,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:04,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:04,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:05,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:05,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:05,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:06,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 78 proven. 933 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2020-09-04 21:46:06,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415818864] [2020-09-04 21:46:06,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:46:06,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-09-04 21:46:06,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862508549] [2020-09-04 21:46:06,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-09-04 21:46:06,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:46:06,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-09-04 21:46:06,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2323, Unknown=0, NotChecked=0, Total=2450 [2020-09-04 21:46:06,585 INFO L87 Difference]: Start difference. First operand 94 states and 124 transitions. Second operand 50 states. [2020-09-04 21:46:08,632 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-09-04 21:46:11,342 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:46:12,778 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:46:13,953 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:46:15,257 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:46:16,427 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:46:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:46:22,823 INFO L93 Difference]: Finished difference Result 106 states and 134 transitions. [2020-09-04 21:46:22,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-04 21:46:22,827 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 216 [2020-09-04 21:46:22,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:46:22,829 INFO L225 Difference]: With dead ends: 106 [2020-09-04 21:46:22,829 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 21:46:22,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=465, Invalid=6845, Unknown=0, NotChecked=0, Total=7310 [2020-09-04 21:46:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 21:46:22,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-09-04 21:46:22,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 21:46:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 123 transitions. [2020-09-04 21:46:22,847 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 123 transitions. Word has length 216 [2020-09-04 21:46:22,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:46:22,847 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 123 transitions. [2020-09-04 21:46:22,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-09-04 21:46:22,847 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 123 transitions. [2020-09-04 21:46:22,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-04 21:46:22,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:46:22,848 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-09-04 21:46:22,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-09-04 21:46:22,848 INFO L427 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:46:22,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:46:22,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1594196054, now seen corresponding path program 77 times [2020-09-04 21:46:22,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:46:22,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821349572] [2020-09-04 21:46:22,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:46:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:23,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:46:23,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:23,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:46:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:23,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:23,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:23,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:23,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:23,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:23,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:23,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:24,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:24,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:24,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:24,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:24,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:25,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-04 21:46:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:25,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:25,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:25,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:25,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:26,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:26,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:26,931 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 46 proven. 446 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-09-04 21:46:26,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821349572] [2020-09-04 21:46:26,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:46:26,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-04 21:46:26,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672597594] [2020-09-04 21:46:26,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 21:46:26,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:46:26,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 21:46:26,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 21:46:26,933 INFO L87 Difference]: Start difference. First operand 94 states and 123 transitions. Second operand 38 states. [2020-09-04 21:46:28,317 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-09-04 21:46:30,148 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:46:31,138 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-09-04 21:46:36,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:46:36,649 INFO L93 Difference]: Finished difference Result 106 states and 133 transitions. [2020-09-04 21:46:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 21:46:36,655 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 156 [2020-09-04 21:46:36,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:46:36,656 INFO L225 Difference]: With dead ends: 106 [2020-09-04 21:46:36,656 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 21:46:36,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 720 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=365, Invalid=4191, Unknown=0, NotChecked=0, Total=4556 [2020-09-04 21:46:36,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 21:46:36,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-09-04 21:46:36,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 21:46:36,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 122 transitions. [2020-09-04 21:46:36,682 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 122 transitions. Word has length 156 [2020-09-04 21:46:36,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:46:36,682 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 122 transitions. [2020-09-04 21:46:36,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-04 21:46:36,683 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 122 transitions. [2020-09-04 21:46:36,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-04 21:46:36,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:46:36,683 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-09-04 21:46:36,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-09-04 21:46:36,684 INFO L427 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:46:36,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:46:36,684 INFO L82 PathProgramCache]: Analyzing trace with hash 2053962219, now seen corresponding path program 78 times [2020-09-04 21:46:36,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:46:36,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1386276223] [2020-09-04 21:46:36,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:46:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:36,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:46:36,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:36,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:46:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:37,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:37,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:37,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:37,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:37,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:37,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:37,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:38,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:38,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:38,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:39,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-04 21:46:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:39,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:39,605 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 2 proven. 272 refuted. 0 times theorem prover too weak. 201 trivial. 0 not checked. [2020-09-04 21:46:39,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1386276223] [2020-09-04 21:46:39,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:46:39,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-04 21:46:39,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54132946] [2020-09-04 21:46:39,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-04 21:46:39,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:46:39,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-04 21:46:39,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2020-09-04 21:46:39,606 INFO L87 Difference]: Start difference. First operand 94 states and 122 transitions. Second operand 32 states. [2020-09-04 21:46:41,117 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2020-09-04 21:46:48,529 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 18 [2020-09-04 21:46:48,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:46:48,997 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2020-09-04 21:46:49,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-04 21:46:49,004 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-09-04 21:46:49,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:46:49,006 INFO L225 Difference]: With dead ends: 106 [2020-09-04 21:46:49,006 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 21:46:49,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=341, Invalid=3565, Unknown=0, NotChecked=0, Total=3906 [2020-09-04 21:46:49,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 21:46:49,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-09-04 21:46:49,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 21:46:49,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 121 transitions. [2020-09-04 21:46:49,050 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 121 transitions. Word has length 126 [2020-09-04 21:46:49,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:46:49,050 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 121 transitions. [2020-09-04 21:46:49,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-04 21:46:49,050 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 121 transitions. [2020-09-04 21:46:49,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-04 21:46:49,052 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:46:49,053 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-09-04 21:46:49,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-09-04 21:46:49,053 INFO L427 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:46:49,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:46:49,054 INFO L82 PathProgramCache]: Analyzing trace with hash 1545853494, now seen corresponding path program 79 times [2020-09-04 21:46:49,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:46:49,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019809640] [2020-09-04 21:46:49,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:46:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:49,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:46:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:49,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:46:49,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:49,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:49,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:49,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:50,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:50,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:50,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:50,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:50,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:50,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:51,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:52,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:52,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-04 21:46:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:52,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:53,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:46:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:46:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 36 proven. 323 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-09-04 21:46:53,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019809640] [2020-09-04 21:46:53,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:46:53,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-04 21:46:53,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167722913] [2020-09-04 21:46:53,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 21:46:53,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:46:53,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 21:46:53,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 21:46:53,457 INFO L87 Difference]: Start difference. First operand 94 states and 121 transitions. Second operand 34 states. [2020-09-04 21:46:54,855 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-09-04 21:47:04,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:47:04,100 INFO L93 Difference]: Finished difference Result 106 states and 131 transitions. [2020-09-04 21:47:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 21:47:04,107 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 136 [2020-09-04 21:47:04,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:47:04,108 INFO L225 Difference]: With dead ends: 106 [2020-09-04 21:47:04,108 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 21:47:04,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=347, Invalid=3685, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 21:47:04,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 21:47:04,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-09-04 21:47:04,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 21:47:04,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 120 transitions. [2020-09-04 21:47:04,127 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 120 transitions. Word has length 136 [2020-09-04 21:47:04,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:47:04,127 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 120 transitions. [2020-09-04 21:47:04,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 21:47:04,128 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 120 transitions. [2020-09-04 21:47:04,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-04 21:47:04,128 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:47:04,128 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-09-04 21:47:04,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-09-04 21:47:04,129 INFO L427 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:47:04,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:47:04,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1926181291, now seen corresponding path program 80 times [2020-09-04 21:47:04,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:47:04,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [532906403] [2020-09-04 21:47:04,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:47:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:04,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:47:04,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:04,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:47:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:04,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:04,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:04,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:05,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:05,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:05,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:05,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:05,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:05,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:06,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:06,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:07,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-04 21:47:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:07,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:07,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:07,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:08,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:08,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:08,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:08,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 51 proven. 515 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-09-04 21:47:09,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [532906403] [2020-09-04 21:47:09,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:47:09,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 21:47:09,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538108426] [2020-09-04 21:47:09,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 21:47:09,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:47:09,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 21:47:09,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 21:47:09,180 INFO L87 Difference]: Start difference. First operand 94 states and 120 transitions. Second operand 40 states. [2020-09-04 21:47:12,756 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:47:13,726 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:47:19,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:47:19,552 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2020-09-04 21:47:19,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 21:47:19,557 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 166 [2020-09-04 21:47:19,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:47:19,558 INFO L225 Difference]: With dead ends: 106 [2020-09-04 21:47:19,558 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 21:47:19,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=374, Invalid=4456, Unknown=0, NotChecked=0, Total=4830 [2020-09-04 21:47:19,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 21:47:19,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2020-09-04 21:47:19,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-04 21:47:19,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 119 transitions. [2020-09-04 21:47:19,584 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 119 transitions. Word has length 166 [2020-09-04 21:47:19,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:47:19,585 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 119 transitions. [2020-09-04 21:47:19,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 21:47:19,585 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 119 transitions. [2020-09-04 21:47:19,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-09-04 21:47:19,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:47:19,586 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 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] [2020-09-04 21:47:19,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-09-04 21:47:19,586 INFO L427 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:47:19,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:47:19,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1850764138, now seen corresponding path program 81 times [2020-09-04 21:47:19,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:47:19,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205815729] [2020-09-04 21:47:19,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:47:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:19,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:47:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:19,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:47:19,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:19,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:20,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:20,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:20,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:20,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:20,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:20,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:20,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:20,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:21,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:21,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:21,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:22,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-04 21:47:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:22,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:22,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:22,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:22,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:22,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:22,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:22,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:22,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:22,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:22,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:22,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:22,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 66 proven. 710 refuted. 0 times theorem prover too weak. 623 trivial. 0 not checked. [2020-09-04 21:47:22,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205815729] [2020-09-04 21:47:22,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:47:22,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-04 21:47:22,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387465872] [2020-09-04 21:47:22,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-04 21:47:22,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:47:22,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-04 21:47:22,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2020-09-04 21:47:22,413 INFO L87 Difference]: Start difference. First operand 94 states and 119 transitions. Second operand 29 states. [2020-09-04 21:47:30,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:47:30,410 INFO L93 Difference]: Finished difference Result 106 states and 129 transitions. [2020-09-04 21:47:30,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-04 21:47:30,415 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 196 [2020-09-04 21:47:30,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:47:30,416 INFO L225 Difference]: With dead ends: 106 [2020-09-04 21:47:30,416 INFO L226 Difference]: Without dead ends: 100 [2020-09-04 21:47:30,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=324, Invalid=3098, Unknown=0, NotChecked=0, Total=3422 [2020-09-04 21:47:30,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-04 21:47:30,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2020-09-04 21:47:30,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-04 21:47:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 113 transitions. [2020-09-04 21:47:30,436 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 113 transitions. Word has length 196 [2020-09-04 21:47:30,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:47:30,436 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 113 transitions. [2020-09-04 21:47:30,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-04 21:47:30,436 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 113 transitions. [2020-09-04 21:47:30,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-04 21:47:30,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:47:30,437 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-09-04 21:47:30,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-09-04 21:47:30,437 INFO L427 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:47:30,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:47:30,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1658058538, now seen corresponding path program 82 times [2020-09-04 21:47:30,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:47:30,438 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76306730] [2020-09-04 21:47:30,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:47:30,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:30,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:47:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:30,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:47:30,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:30,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:31,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 21:47:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:31,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:31,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:31,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:31,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:32,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:32,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:32,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:32,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:32,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:32,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:33,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:33,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:33,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:34,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:34,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 35 proven. 441 refuted. 0 times theorem prover too weak. 335 trivial. 0 not checked. [2020-09-04 21:47:35,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76306730] [2020-09-04 21:47:35,094 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:47:35,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 21:47:35,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789222958] [2020-09-04 21:47:35,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 21:47:35,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:47:35,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 21:47:35,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 21:47:35,095 INFO L87 Difference]: Start difference. First operand 90 states and 113 transitions. Second operand 40 states. [2020-09-04 21:47:47,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:47:47,807 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2020-09-04 21:47:47,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-04 21:47:47,812 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 156 [2020-09-04 21:47:47,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:47:47,813 INFO L225 Difference]: With dead ends: 111 [2020-09-04 21:47:47,813 INFO L226 Difference]: Without dead ends: 105 [2020-09-04 21:47:47,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=477, Invalid=5685, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 21:47:47,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-04 21:47:47,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-09-04 21:47:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-04 21:47:47,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2020-09-04 21:47:47,838 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 156 [2020-09-04 21:47:47,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:47:47,838 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2020-09-04 21:47:47,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 21:47:47,838 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2020-09-04 21:47:47,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-04 21:47:47,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:47:47,839 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-09-04 21:47:47,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-09-04 21:47:47,839 INFO L427 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:47:47,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:47:47,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1871353813, now seen corresponding path program 83 times [2020-09-04 21:47:47,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:47:47,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480324656] [2020-09-04 21:47:47,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:47:47,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:48,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:47:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:48,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:47:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:48,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:48,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:48,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:48,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-04 21:47:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:49,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:49,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:49,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:49,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:49,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:50,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:50,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:50,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:50,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:51,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:51,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:51,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:51,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:52,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:52,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:53,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:47:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:47:53,401 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 59 proven. 507 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-09-04 21:47:53,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480324656] [2020-09-04 21:47:53,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:47:53,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 21:47:53,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541314075] [2020-09-04 21:47:53,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 21:47:53,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:47:53,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 21:47:53,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 21:47:53,403 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand 40 states. [2020-09-04 21:47:55,211 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2020-09-04 21:48:06,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:48:06,063 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-09-04 21:48:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-04 21:48:06,064 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 166 [2020-09-04 21:48:06,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:48:06,065 INFO L225 Difference]: With dead ends: 115 [2020-09-04 21:48:06,065 INFO L226 Difference]: Without dead ends: 109 [2020-09-04 21:48:06,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=443, Invalid=5719, Unknown=0, NotChecked=0, Total=6162 [2020-09-04 21:48:06,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-04 21:48:06,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-09-04 21:48:06,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-04 21:48:06,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2020-09-04 21:48:06,090 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 166 [2020-09-04 21:48:06,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:48:06,090 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2020-09-04 21:48:06,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 21:48:06,090 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2020-09-04 21:48:06,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-09-04 21:48:06,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:48:06,092 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 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] [2020-09-04 21:48:06,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-09-04 21:48:06,092 INFO L427 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:48:06,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:48:06,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1968967818, now seen corresponding path program 84 times [2020-09-04 21:48:06,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:48:06,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558553117] [2020-09-04 21:48:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:48:06,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:06,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:48:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:06,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:48:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:06,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:06,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:06,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:07,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:07,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-04 21:48:07,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:07,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:07,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:08,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:08,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:08,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:09,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:09,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:09,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:10,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:10,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:10,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:11,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:11,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 63 proven. 582 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-09-04 21:48:11,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558553117] [2020-09-04 21:48:11,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:48:11,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-09-04 21:48:11,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972326079] [2020-09-04 21:48:11,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-09-04 21:48:11,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:48:11,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-09-04 21:48:11,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 21:48:11,614 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand 42 states. [2020-09-04 21:48:15,483 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-09-04 21:48:26,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:48:26,925 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-09-04 21:48:26,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-04 21:48:26,926 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 176 [2020-09-04 21:48:26,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:48:26,927 INFO L225 Difference]: With dead ends: 115 [2020-09-04 21:48:26,927 INFO L226 Difference]: Without dead ends: 109 [2020-09-04 21:48:26,928 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=452, Invalid=6028, Unknown=0, NotChecked=0, Total=6480 [2020-09-04 21:48:26,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-04 21:48:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-09-04 21:48:26,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-04 21:48:26,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2020-09-04 21:48:26,965 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 176 [2020-09-04 21:48:26,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:48:26,965 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2020-09-04 21:48:26,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-09-04 21:48:26,965 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2020-09-04 21:48:26,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-04 21:48:26,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:48:26,967 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 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] [2020-09-04 21:48:26,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-09-04 21:48:26,967 INFO L427 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:48:26,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:48:26,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1963194507, now seen corresponding path program 85 times [2020-09-04 21:48:26,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:48:26,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915582471] [2020-09-04 21:48:26,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:48:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:27,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:48:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:27,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:48:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:27,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:27,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:27,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:27,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:27,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:28,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:28,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-04 21:48:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:28,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:28,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:29,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:29,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:29,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:29,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:30,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:30,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:30,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:30,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:31,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:31,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:32,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:32,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 67 proven. 662 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-09-04 21:48:33,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915582471] [2020-09-04 21:48:33,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:48:33,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-04 21:48:33,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515369419] [2020-09-04 21:48:33,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 21:48:33,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:48:33,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 21:48:33,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1780, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 21:48:33,124 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand 44 states. [2020-09-04 21:48:36,068 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-09-04 21:48:37,281 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:48:38,417 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-09-04 21:48:48,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:48:48,510 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-09-04 21:48:48,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-04 21:48:48,515 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 186 [2020-09-04 21:48:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:48:48,517 INFO L225 Difference]: With dead ends: 115 [2020-09-04 21:48:48,517 INFO L226 Difference]: Without dead ends: 109 [2020-09-04 21:48:48,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1146 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=461, Invalid=6345, Unknown=0, NotChecked=0, Total=6806 [2020-09-04 21:48:48,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-04 21:48:48,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-09-04 21:48:48,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-04 21:48:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2020-09-04 21:48:48,542 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 186 [2020-09-04 21:48:48,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:48:48,543 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2020-09-04 21:48:48,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 21:48:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2020-09-04 21:48:48,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-09-04 21:48:48,553 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:48:48,553 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 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] [2020-09-04 21:48:48,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-09-04 21:48:48,553 INFO L427 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:48:48,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:48:48,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1816908266, now seen corresponding path program 86 times [2020-09-04 21:48:48,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:48:48,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1580337567] [2020-09-04 21:48:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:48:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:48,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:48:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:48,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:48:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:49,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:49,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:49,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:49,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:49,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:49,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:50,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:50,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:50,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-09-04 21:48:50,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:50,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:51,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:51,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:51,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:52,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:52,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:52,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:53,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:53,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:53,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:53,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:53,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:54,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:54,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:54,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:54,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:55,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:48:55,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:48:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1399 backedges. 71 proven. 747 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2020-09-04 21:48:55,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1580337567] [2020-09-04 21:48:55,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:48:55,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-09-04 21:48:55,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808264775] [2020-09-04 21:48:55,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-09-04 21:48:55,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:48:55,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-09-04 21:48:55,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1953, Unknown=0, NotChecked=0, Total=2070 [2020-09-04 21:48:55,810 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand 46 states. [2020-09-04 21:48:57,843 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2020-09-04 21:48:59,108 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-09-04 21:49:00,483 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:49:01,263 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-09-04 21:49:01,731 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:49:02,977 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-09-04 21:49:12,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:49:12,958 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-09-04 21:49:12,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-04 21:49:12,965 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 196 [2020-09-04 21:49:12,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:49:12,966 INFO L225 Difference]: With dead ends: 115 [2020-09-04 21:49:12,966 INFO L226 Difference]: Without dead ends: 109 [2020-09-04 21:49:12,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1171 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=470, Invalid=6670, Unknown=0, NotChecked=0, Total=7140 [2020-09-04 21:49:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-04 21:49:12,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-09-04 21:49:12,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-04 21:49:12,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2020-09-04 21:49:12,990 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 196 [2020-09-04 21:49:12,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:49:12,990 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2020-09-04 21:49:12,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-09-04 21:49:12,990 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2020-09-04 21:49:12,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-09-04 21:49:12,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:49:12,991 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 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] [2020-09-04 21:49:12,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-09-04 21:49:12,992 INFO L427 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:49:12,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:49:12,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1987464981, now seen corresponding path program 87 times [2020-09-04 21:49:12,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:49:12,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321164254] [2020-09-04 21:49:12,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:49:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:13,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:49:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:13,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:49:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:13,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:13,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:13,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:13,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:14,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:14,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:14,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:15,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:15,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-09-04 21:49:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:15,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:16,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:16,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:16,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:17,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:17,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:17,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:18,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:18,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:19,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:19,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:20,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:20,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:21,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1571 backedges. 75 proven. 837 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2020-09-04 21:49:21,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321164254] [2020-09-04 21:49:21,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:49:21,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-09-04 21:49:21,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440052110] [2020-09-04 21:49:21,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-09-04 21:49:21,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:49:21,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-09-04 21:49:21,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2134, Unknown=0, NotChecked=0, Total=2256 [2020-09-04 21:49:21,840 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand 48 states. [2020-09-04 21:49:23,806 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-09-04 21:49:25,010 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-09-04 21:49:26,357 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:49:26,655 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-09-04 21:49:27,644 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:49:27,943 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-09-04 21:49:28,911 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:49:30,187 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-09-04 21:49:38,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:49:38,813 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-09-04 21:49:38,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-04 21:49:38,819 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 206 [2020-09-04 21:49:38,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:49:38,821 INFO L225 Difference]: With dead ends: 115 [2020-09-04 21:49:38,821 INFO L226 Difference]: Without dead ends: 109 [2020-09-04 21:49:38,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=479, Invalid=7003, Unknown=0, NotChecked=0, Total=7482 [2020-09-04 21:49:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-04 21:49:38,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-09-04 21:49:38,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-04 21:49:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2020-09-04 21:49:38,846 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 206 [2020-09-04 21:49:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:49:38,846 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2020-09-04 21:49:38,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-09-04 21:49:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2020-09-04 21:49:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-09-04 21:49:38,847 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:49:38,847 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 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] [2020-09-04 21:49:38,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-09-04 21:49:38,848 INFO L427 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:49:38,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:49:38,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1316930742, now seen corresponding path program 88 times [2020-09-04 21:49:38,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:49:38,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330928650] [2020-09-04 21:49:38,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:49:38,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:39,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:49:39,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:39,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:49:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:39,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:39,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:39,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:39,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:39,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:40,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:40,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:41,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:41,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:41,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-09-04 21:49:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:41,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:41,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:42,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:42,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:42,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:42,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:42,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:43,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:43,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:44,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:45,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:45,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:45,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:46,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:47,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:49:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:49:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 79 proven. 932 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2020-09-04 21:49:47,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330928650] [2020-09-04 21:49:47,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:49:47,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-09-04 21:49:47,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490294249] [2020-09-04 21:49:47,700 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-09-04 21:49:47,700 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:49:47,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-09-04 21:49:47,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2323, Unknown=0, NotChecked=0, Total=2450 [2020-09-04 21:49:47,701 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand 50 states. [2020-09-04 21:49:49,747 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-09-04 21:49:50,376 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-09-04 21:49:51,172 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-09-04 21:49:51,976 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-09-04 21:49:52,360 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-09-04 21:49:53,514 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:49:54,822 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:49:56,143 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:49:57,507 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:49:58,220 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-09-04 21:49:58,900 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-09-04 21:49:59,230 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-09-04 21:50:07,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:50:07,466 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-09-04 21:50:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-04 21:50:07,472 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 216 [2020-09-04 21:50:07,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:50:07,473 INFO L225 Difference]: With dead ends: 115 [2020-09-04 21:50:07,473 INFO L226 Difference]: Without dead ends: 109 [2020-09-04 21:50:07,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=488, Invalid=7344, Unknown=0, NotChecked=0, Total=7832 [2020-09-04 21:50:07,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-04 21:50:07,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2020-09-04 21:50:07,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-04 21:50:07,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 126 transitions. [2020-09-04 21:50:07,510 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 126 transitions. Word has length 216 [2020-09-04 21:50:07,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:50:07,511 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 126 transitions. [2020-09-04 21:50:07,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-09-04 21:50:07,511 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 126 transitions. [2020-09-04 21:50:07,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-09-04 21:50:07,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:50:07,513 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 19, 19, 19, 19, 19, 19, 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] [2020-09-04 21:50:07,513 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-09-04 21:50:07,513 INFO L427 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:50:07,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:50:07,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1004835147, now seen corresponding path program 89 times [2020-09-04 21:50:07,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:50:07,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694359263] [2020-09-04 21:50:07,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:50:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:07,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:50:07,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:07,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:50:07,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:08,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:08,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:08,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:08,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:08,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:09,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:09,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:09,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:10,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:10,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2020-09-04 21:50:10,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:10,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:11,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:11,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:12,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:12,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:12,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:13,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:13,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:13,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:13,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:14,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:15,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:15,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:15,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:15,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:16,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:16,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1945 backedges. 83 proven. 1032 refuted. 0 times theorem prover too weak. 830 trivial. 0 not checked. [2020-09-04 21:50:16,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694359263] [2020-09-04 21:50:16,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:50:16,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-09-04 21:50:16,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349491960] [2020-09-04 21:50:16,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-09-04 21:50:16,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:50:16,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-09-04 21:50:16,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2520, Unknown=0, NotChecked=0, Total=2652 [2020-09-04 21:50:16,949 INFO L87 Difference]: Start difference. First operand 99 states and 126 transitions. Second operand 52 states. [2020-09-04 21:50:19,139 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 18 [2020-09-04 21:50:19,829 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-09-04 21:50:20,832 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-09-04 21:50:21,532 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-09-04 21:50:21,925 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-09-04 21:50:23,335 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:50:23,722 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-09-04 21:50:24,371 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-09-04 21:50:24,968 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:50:25,288 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-09-04 21:50:26,366 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:50:27,765 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:50:29,212 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:50:30,674 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-09-04 21:50:38,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:50:38,106 INFO L93 Difference]: Finished difference Result 111 states and 136 transitions. [2020-09-04 21:50:38,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-04 21:50:38,106 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 226 [2020-09-04 21:50:38,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:50:38,108 INFO L225 Difference]: With dead ends: 111 [2020-09-04 21:50:38,108 INFO L226 Difference]: Without dead ends: 105 [2020-09-04 21:50:38,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=497, Invalid=7693, Unknown=0, NotChecked=0, Total=8190 [2020-09-04 21:50:38,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-04 21:50:38,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 95. [2020-09-04 21:50:38,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-04 21:50:38,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 120 transitions. [2020-09-04 21:50:38,128 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 120 transitions. Word has length 226 [2020-09-04 21:50:38,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:50:38,129 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 120 transitions. [2020-09-04 21:50:38,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-09-04 21:50:38,129 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 120 transitions. [2020-09-04 21:50:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-09-04 21:50:38,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:50:38,130 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 13, 13, 13, 13, 13, 13, 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] [2020-09-04 21:50:38,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2020-09-04 21:50:38,130 INFO L427 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:50:38,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:50:38,130 INFO L82 PathProgramCache]: Analyzing trace with hash 980917921, now seen corresponding path program 90 times [2020-09-04 21:50:38,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:50:38,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620615820] [2020-09-04 21:50:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:50:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:38,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:50:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:38,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:50:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:38,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:38,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:38,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:39,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:39,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:39,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:39,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:39,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:39,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:40,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:40,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:40,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:41,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:41,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:41,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-04 21:50:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:42,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:42,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:42,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:42,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:43,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:43,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 943 backedges. 50 proven. 516 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2020-09-04 21:50:43,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620615820] [2020-09-04 21:50:43,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:50:43,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-04 21:50:43,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956260142] [2020-09-04 21:50:43,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-04 21:50:43,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:50:43,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-04 21:50:43,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1458, Unknown=0, NotChecked=0, Total=1560 [2020-09-04 21:50:43,741 INFO L87 Difference]: Start difference. First operand 95 states and 120 transitions. Second operand 40 states. [2020-09-04 21:50:45,549 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-09-04 21:50:46,660 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-09-04 21:50:47,424 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2020-09-04 21:50:47,868 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:50:49,023 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-09-04 21:50:49,328 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2020-09-04 21:50:58,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:50:58,616 INFO L93 Difference]: Finished difference Result 111 states and 146 transitions. [2020-09-04 21:50:58,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 21:50:58,622 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 166 [2020-09-04 21:50:58,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:50:58,624 INFO L225 Difference]: With dead ends: 111 [2020-09-04 21:50:58,624 INFO L226 Difference]: Without dead ends: 105 [2020-09-04 21:50:58,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=397, Invalid=4859, Unknown=0, NotChecked=0, Total=5256 [2020-09-04 21:50:58,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-04 21:50:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-09-04 21:50:58,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-04 21:50:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 135 transitions. [2020-09-04 21:50:58,652 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 135 transitions. Word has length 166 [2020-09-04 21:50:58,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:50:58,652 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 135 transitions. [2020-09-04 21:50:58,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-09-04 21:50:58,652 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 135 transitions. [2020-09-04 21:50:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-09-04 21:50:58,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:50:58,653 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 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] [2020-09-04 21:50:58,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2020-09-04 21:50:58,653 INFO L427 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:50:58,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:50:58,654 INFO L82 PathProgramCache]: Analyzing trace with hash 797952321, now seen corresponding path program 91 times [2020-09-04 21:50:58,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:50:58,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884686838] [2020-09-04 21:50:58,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:50:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:58,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:50:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:58,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:50:58,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:59,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:59,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:59,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:59,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:59,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:59,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:50:59,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:50:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:00,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:00,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:00,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:00,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:01,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:02,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-04 21:51:02,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:02,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:02,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:02,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:03,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:03,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:03,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:03,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:04,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:04,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1237 backedges. 60 proven. 669 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2020-09-04 21:51:05,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884686838] [2020-09-04 21:51:05,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:51:05,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-09-04 21:51:05,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605419810] [2020-09-04 21:51:05,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-09-04 21:51:05,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:51:05,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-09-04 21:51:05,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1780, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 21:51:05,110 INFO L87 Difference]: Start difference. First operand 99 states and 135 transitions. Second operand 44 states. [2020-09-04 21:51:07,026 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2020-09-04 21:51:08,168 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-09-04 21:51:09,415 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:51:10,566 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:51:11,753 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-09-04 21:51:12,972 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-09-04 21:51:19,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:51:19,163 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2020-09-04 21:51:19,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 21:51:19,170 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 186 [2020-09-04 21:51:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:51:19,171 INFO L225 Difference]: With dead ends: 111 [2020-09-04 21:51:19,172 INFO L226 Difference]: Without dead ends: 105 [2020-09-04 21:51:19,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 897 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=415, Invalid=5437, Unknown=0, NotChecked=0, Total=5852 [2020-09-04 21:51:19,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-04 21:51:19,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-09-04 21:51:19,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-04 21:51:19,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2020-09-04 21:51:19,195 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 186 [2020-09-04 21:51:19,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:51:19,196 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2020-09-04 21:51:19,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-09-04 21:51:19,196 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2020-09-04 21:51:19,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-09-04 21:51:19,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:51:19,197 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 18, 18, 18, 18, 18, 18, 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] [2020-09-04 21:51:19,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2020-09-04 21:51:19,198 INFO L427 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:51:19,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:51:19,198 INFO L82 PathProgramCache]: Analyzing trace with hash 113467126, now seen corresponding path program 92 times [2020-09-04 21:51:19,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:51:19,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822289601] [2020-09-04 21:51:19,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:51:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:19,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:51:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:19,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:51:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:19,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:19,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:20,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:20,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:20,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:20,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:20,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:21,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:21,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:22,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:22,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:22,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-04 21:51:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:22,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:22,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:22,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:22,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:22,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:22,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:22,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:22,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:22,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:23,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:23,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:23,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:23,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:23,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:23,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 75 proven. 889 refuted. 0 times theorem prover too weak. 789 trivial. 0 not checked. [2020-09-04 21:51:23,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822289601] [2020-09-04 21:51:23,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:51:23,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-04 21:51:23,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532360935] [2020-09-04 21:51:23,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-04 21:51:23,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:51:23,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-04 21:51:23,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=852, Unknown=0, NotChecked=0, Total=930 [2020-09-04 21:51:23,205 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand 31 states. [2020-09-04 21:51:33,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:51:33,143 INFO L93 Difference]: Finished difference Result 111 states and 144 transitions. [2020-09-04 21:51:33,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-04 21:51:33,150 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 216 [2020-09-04 21:51:33,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:51:33,151 INFO L225 Difference]: With dead ends: 111 [2020-09-04 21:51:33,151 INFO L226 Difference]: Without dead ends: 105 [2020-09-04 21:51:33,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=356, Invalid=3676, Unknown=0, NotChecked=0, Total=4032 [2020-09-04 21:51:33,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-04 21:51:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-09-04 21:51:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-04 21:51:33,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2020-09-04 21:51:33,172 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 216 [2020-09-04 21:51:33,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:51:33,172 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2020-09-04 21:51:33,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-04 21:51:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2020-09-04 21:51:33,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-09-04 21:51:33,173 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:51:33,173 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 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] [2020-09-04 21:51:33,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2020-09-04 21:51:33,174 INFO L427 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:51:33,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:51:33,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1179341270, now seen corresponding path program 93 times [2020-09-04 21:51:33,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:51:33,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869632379] [2020-09-04 21:51:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:51:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:33,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:51:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:33,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 21:51:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:33,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:33,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:33,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:34,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:34,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:34,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:34,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:35,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:35,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:36,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:36,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2020-09-04 21:51:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:37,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:37,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:37,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:38,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 21:51:38,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:51:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 811 backedges. 45 proven. 447 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2020-09-04 21:51:38,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869632379] [2020-09-04 21:51:38,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:51:38,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-04 21:51:38,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695048180] [2020-09-04 21:51:38,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-04 21:51:38,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:51:38,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-04 21:51:38,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2020-09-04 21:51:38,482 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand 38 states. [2020-09-04 21:51:40,599 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2020-09-04 21:51:41,733 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-09-04 21:51:42,979 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2020-09-04 21:51:43,250 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 22