/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 14:01:16,943 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 14:01:16,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 14:01:16,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 14:01:16,958 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 14:01:16,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 14:01:16,960 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 14:01:16,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 14:01:16,963 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 14:01:16,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 14:01:16,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 14:01:16,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 14:01:16,967 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 14:01:16,968 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 14:01:16,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 14:01:16,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 14:01:16,970 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 14:01:16,971 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 14:01:16,973 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 14:01:16,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 14:01:16,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 14:01:16,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 14:01:16,979 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 14:01:16,980 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 14:01:16,982 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 14:01:16,990 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 14:01:16,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 14:01:16,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 14:01:16,992 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 14:01:17,001 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 14:01:17,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 14:01:17,003 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 14:01:17,003 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 14:01:17,003 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 14:01:17,004 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 14:01:17,004 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 14:01:17,004 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 14:01:17,004 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 14:01:17,004 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 14:01:17,004 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 14:01:17,005 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 14:01:17,005 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 14:01:17,005 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 14:01:17,005 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 14:01:17,005 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 14:01:17,006 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 14:01:17,006 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 14:01:17,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:01:17,006 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 14:01:17,006 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 14:01:17,007 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 14:01:17,007 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 14:01:17,291 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 14:01:17,314 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 14:01:17,317 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 14:01:17,318 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 14:01:17,319 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 14:01:17,319 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-07-07 14:01:17,392 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6535be06f/e0e1c8793f0b4a618dedf0e66c7c21f6/FLAGf618662f0 [2020-07-07 14:01:17,858 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 14:01:17,858 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-07-07 14:01:17,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6535be06f/e0e1c8793f0b4a618dedf0e66c7c21f6/FLAGf618662f0 [2020-07-07 14:01:18,209 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6535be06f/e0e1c8793f0b4a618dedf0e66c7c21f6 [2020-07-07 14:01:18,218 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 14:01:18,220 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 14:01:18,221 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 14:01:18,222 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 14:01:18,225 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 14:01:18,226 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:01:18" (1/1) ... [2020-07-07 14:01:18,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e1bd7e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:18, skipping insertion in model container [2020-07-07 14:01:18,229 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:01:18" (1/1) ... [2020-07-07 14:01:18,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 14:01:18,252 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 14:01:18,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:01:18,412 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 14:01:18,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:01:18,443 INFO L208 MainTranslator]: Completed translation [2020-07-07 14:01:18,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:18 WrapperNode [2020-07-07 14:01:18,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 14:01:18,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 14:01:18,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 14:01:18,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 14:01:18,458 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:18" (1/1) ... [2020-07-07 14:01:18,459 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:18" (1/1) ... [2020-07-07 14:01:18,464 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:18" (1/1) ... [2020-07-07 14:01:18,464 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:18" (1/1) ... [2020-07-07 14:01:18,467 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:18" (1/1) ... [2020-07-07 14:01:18,472 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:18" (1/1) ... [2020-07-07 14:01:18,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:18" (1/1) ... [2020-07-07 14:01:18,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 14:01:18,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 14:01:18,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 14:01:18,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 14:01:18,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:01:18,617 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 14:01:18,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 14:01:18,618 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 14:01:18,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 14:01:18,618 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 14:01:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 14:01:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 14:01:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 14:01:18,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 14:01:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 14:01:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 14:01:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 14:01:18,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 14:01:18,806 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 14:01:18,807 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-07 14:01:18,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:01:18 BoogieIcfgContainer [2020-07-07 14:01:18,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 14:01:18,814 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 14:01:18,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 14:01:18,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 14:01:18,820 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 02:01:18" (1/3) ... [2020-07-07 14:01:18,821 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1197267d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:01:18, skipping insertion in model container [2020-07-07 14:01:18,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:18" (2/3) ... [2020-07-07 14:01:18,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1197267d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:01:18, skipping insertion in model container [2020-07-07 14:01:18,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:01:18" (3/3) ... [2020-07-07 14:01:18,824 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-07-07 14:01:18,836 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 14:01:18,843 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 14:01:18,863 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 14:01:18,889 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 14:01:18,889 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 14:01:18,889 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 14:01:18,889 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 14:01:18,890 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 14:01:18,890 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 14:01:18,890 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 14:01:18,890 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 14:01:18,907 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-07 14:01:18,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-07 14:01:18,923 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:18,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:18,926 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:18,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:18,934 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-07-07 14:01:18,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:18,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759444049] [2020-07-07 14:01:18,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:19,068 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:19,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759444049] [2020-07-07 14:01:19,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:19,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-07 14:01:19,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807176132] [2020-07-07 14:01:19,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-07 14:01:19,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:19,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-07 14:01:19,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 14:01:19,095 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-07-07 14:01:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:19,121 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-07-07 14:01:19,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-07 14:01:19,123 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-07 14:01:19,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:19,132 INFO L225 Difference]: With dead ends: 41 [2020-07-07 14:01:19,132 INFO L226 Difference]: Without dead ends: 22 [2020-07-07 14:01:19,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-07 14:01:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-07 14:01:19,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-07 14:01:19,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-07 14:01:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-07 14:01:19,178 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2020-07-07 14:01:19,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:19,179 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-07 14:01:19,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-07 14:01:19,179 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-07 14:01:19,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-07 14:01:19,181 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:19,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:19,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 14:01:19,182 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:19,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:19,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1179723712, now seen corresponding path program 1 times [2020-07-07 14:01:19,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:19,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968625100] [2020-07-07 14:01:19,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:19,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:19,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:19,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:19,242 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:19,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968625100] [2020-07-07 14:01:19,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:19,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-07 14:01:19,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047401330] [2020-07-07 14:01:19,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-07 14:01:19,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:19,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-07 14:01:19,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-07 14:01:19,246 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2020-07-07 14:01:19,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:19,315 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-07-07 14:01:19,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 14:01:19,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-07-07 14:01:19,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:19,319 INFO L225 Difference]: With dead ends: 50 [2020-07-07 14:01:19,320 INFO L226 Difference]: Without dead ends: 34 [2020-07-07 14:01:19,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-07 14:01:19,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-07 14:01:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2020-07-07 14:01:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-07 14:01:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-07 14:01:19,332 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-07-07 14:01:19,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:19,333 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-07 14:01:19,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-07 14:01:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-07 14:01:19,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-07 14:01:19,334 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:19,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:19,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 14:01:19,335 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:19,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:19,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1535220285, now seen corresponding path program 1 times [2020-07-07 14:01:19,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:19,336 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1158300384] [2020-07-07 14:01:19,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:19,435 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:19,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1158300384] [2020-07-07 14:01:19,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:19,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 14:01:19,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952805618] [2020-07-07 14:01:19,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 14:01:19,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:19,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 14:01:19,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 14:01:19,438 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-07-07 14:01:19,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:19,504 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-07-07 14:01:19,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 14:01:19,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-07 14:01:19,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:19,506 INFO L225 Difference]: With dead ends: 38 [2020-07-07 14:01:19,507 INFO L226 Difference]: Without dead ends: 31 [2020-07-07 14:01:19,508 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 14:01:19,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-07 14:01:19,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-07-07 14:01:19,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 14:01:19,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-07 14:01:19,517 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 17 [2020-07-07 14:01:19,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:19,518 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-07 14:01:19,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 14:01:19,518 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-07 14:01:19,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-07 14:01:19,519 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:19,520 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:19,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-07 14:01:19,520 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:19,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:19,521 INFO L82 PathProgramCache]: Analyzing trace with hash 463086038, now seen corresponding path program 1 times [2020-07-07 14:01:19,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:19,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769408217] [2020-07-07 14:01:19,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:19,600 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:19,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769408217] [2020-07-07 14:01:19,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:19,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 14:01:19,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853940156] [2020-07-07 14:01:19,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 14:01:19,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:19,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 14:01:19,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-07 14:01:19,603 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-07-07 14:01:19,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:19,673 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-07-07 14:01:19,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 14:01:19,674 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-07 14:01:19,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:19,675 INFO L225 Difference]: With dead ends: 59 [2020-07-07 14:01:19,675 INFO L226 Difference]: Without dead ends: 43 [2020-07-07 14:01:19,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:01:19,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-07 14:01:19,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-07-07 14:01:19,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 14:01:19,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-07 14:01:19,685 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 24 [2020-07-07 14:01:19,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:19,686 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-07 14:01:19,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 14:01:19,686 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-07 14:01:19,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-07 14:01:19,687 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:19,687 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:19,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-07 14:01:19,688 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:19,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:19,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1265709657, now seen corresponding path program 1 times [2020-07-07 14:01:19,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:19,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272219949] [2020-07-07 14:01:19,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:19,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:19,772 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:19,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272219949] [2020-07-07 14:01:19,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:19,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 14:01:19,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047156471] [2020-07-07 14:01:19,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 14:01:19,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:19,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 14:01:19,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:01:19,775 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-07-07 14:01:19,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:19,842 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-07 14:01:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 14:01:19,843 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-07-07 14:01:19,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:19,844 INFO L225 Difference]: With dead ends: 46 [2020-07-07 14:01:19,844 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 14:01:19,845 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-07-07 14:01:19,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 14:01:19,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-07-07 14:01:19,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 14:01:19,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-07 14:01:19,854 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2020-07-07 14:01:19,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:19,855 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-07 14:01:19,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 14:01:19,855 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-07 14:01:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-07 14:01:19,856 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:19,856 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:19,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-07 14:01:19,857 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:19,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:19,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1847206016, now seen corresponding path program 2 times [2020-07-07 14:01:19,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:19,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032097054] [2020-07-07 14:01:19,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:19,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:19,943 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:19,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032097054] [2020-07-07 14:01:19,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:19,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 14:01:19,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791852502] [2020-07-07 14:01:19,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 14:01:19,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:19,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 14:01:19,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-07 14:01:19,945 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 6 states. [2020-07-07 14:01:20,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:20,027 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-07-07 14:01:20,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 14:01:20,028 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-07-07 14:01:20,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:20,029 INFO L225 Difference]: With dead ends: 68 [2020-07-07 14:01:20,029 INFO L226 Difference]: Without dead ends: 52 [2020-07-07 14:01:20,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-07 14:01:20,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-07 14:01:20,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-07-07 14:01:20,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 14:01:20,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-07 14:01:20,039 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 33 [2020-07-07 14:01:20,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:20,039 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-07 14:01:20,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 14:01:20,039 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-07 14:01:20,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-07 14:01:20,040 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:20,041 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:20,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-07 14:01:20,041 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:20,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:20,042 INFO L82 PathProgramCache]: Analyzing trace with hash -34853245, now seen corresponding path program 2 times [2020-07-07 14:01:20,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:20,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572869938] [2020-07-07 14:01:20,042 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:20,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:20,141 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:20,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572869938] [2020-07-07 14:01:20,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:20,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 14:01:20,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330165871] [2020-07-07 14:01:20,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 14:01:20,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:20,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 14:01:20,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-07 14:01:20,144 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 8 states. [2020-07-07 14:01:20,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:20,242 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-07 14:01:20,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 14:01:20,243 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-07-07 14:01:20,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:20,244 INFO L225 Difference]: With dead ends: 55 [2020-07-07 14:01:20,244 INFO L226 Difference]: Without dead ends: 48 [2020-07-07 14:01:20,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-07-07 14:01:20,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-07 14:01:20,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-07-07 14:01:20,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 14:01:20,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-07 14:01:20,258 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 35 [2020-07-07 14:01:20,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:20,259 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-07 14:01:20,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 14:01:20,260 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-07 14:01:20,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-07 14:01:20,262 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:20,262 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:20,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-07 14:01:20,262 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:20,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:20,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1854078698, now seen corresponding path program 3 times [2020-07-07 14:01:20,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:20,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601237854] [2020-07-07 14:01:20,263 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:20,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:20,361 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:20,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601237854] [2020-07-07 14:01:20,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:20,361 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-07 14:01:20,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837560419] [2020-07-07 14:01:20,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 14:01:20,362 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:20,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 14:01:20,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-07 14:01:20,363 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 7 states. [2020-07-07 14:01:20,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:20,454 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-07-07 14:01:20,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 14:01:20,454 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-07-07 14:01:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:20,455 INFO L225 Difference]: With dead ends: 77 [2020-07-07 14:01:20,456 INFO L226 Difference]: Without dead ends: 61 [2020-07-07 14:01:20,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:01:20,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-07 14:01:20,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2020-07-07 14:01:20,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 14:01:20,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-07 14:01:20,465 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 42 [2020-07-07 14:01:20,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:20,465 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-07 14:01:20,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 14:01:20,465 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-07 14:01:20,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-07 14:01:20,466 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:20,466 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:20,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-07 14:01:20,467 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:20,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:20,467 INFO L82 PathProgramCache]: Analyzing trace with hash -736542311, now seen corresponding path program 3 times [2020-07-07 14:01:20,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:20,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341581119] [2020-07-07 14:01:20,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:20,587 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:20,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341581119] [2020-07-07 14:01:20,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:20,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 14:01:20,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420230702] [2020-07-07 14:01:20,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 14:01:20,589 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:20,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 14:01:20,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:01:20,589 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 11 states. [2020-07-07 14:01:20,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:20,751 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-07 14:01:20,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 14:01:20,752 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-07-07 14:01:20,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:20,753 INFO L225 Difference]: With dead ends: 64 [2020-07-07 14:01:20,753 INFO L226 Difference]: Without dead ends: 57 [2020-07-07 14:01:20,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-07 14:01:20,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-07 14:01:20,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-07-07 14:01:20,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 14:01:20,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-07 14:01:20,764 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 44 [2020-07-07 14:01:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:20,764 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-07 14:01:20,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 14:01:20,765 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-07 14:01:20,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-07 14:01:20,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:20,766 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:20,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-07 14:01:20,766 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:20,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:20,767 INFO L82 PathProgramCache]: Analyzing trace with hash -2107741888, now seen corresponding path program 4 times [2020-07-07 14:01:20,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:20,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110797916] [2020-07-07 14:01:20,768 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:20,851 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:20,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110797916] [2020-07-07 14:01:20,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:20,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 14:01:20,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512454777] [2020-07-07 14:01:20,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 14:01:20,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:20,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 14:01:20,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-07 14:01:20,854 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 8 states. [2020-07-07 14:01:20,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:20,979 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-07-07 14:01:20,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 14:01:20,979 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-07-07 14:01:20,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:20,980 INFO L225 Difference]: With dead ends: 86 [2020-07-07 14:01:20,981 INFO L226 Difference]: Without dead ends: 70 [2020-07-07 14:01:20,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-07-07 14:01:20,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-07 14:01:20,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-07-07 14:01:20,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-07 14:01:20,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-07 14:01:20,990 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 51 [2020-07-07 14:01:20,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:20,991 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-07 14:01:20,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 14:01:20,991 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-07 14:01:20,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-07 14:01:20,992 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:20,992 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:20,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-07 14:01:20,992 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:20,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:20,993 INFO L82 PathProgramCache]: Analyzing trace with hash 306267971, now seen corresponding path program 4 times [2020-07-07 14:01:20,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:20,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100597902] [2020-07-07 14:01:20,994 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:21,144 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:21,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100597902] [2020-07-07 14:01:21,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:21,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 14:01:21,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755870719] [2020-07-07 14:01:21,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 14:01:21,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:21,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 14:01:21,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-07-07 14:01:21,147 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 13 states. [2020-07-07 14:01:21,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:21,344 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-07 14:01:21,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 14:01:21,345 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-07-07 14:01:21,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:21,346 INFO L225 Difference]: With dead ends: 73 [2020-07-07 14:01:21,346 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 14:01:21,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2020-07-07 14:01:21,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 14:01:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-07-07 14:01:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-07 14:01:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-07 14:01:21,356 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 53 [2020-07-07 14:01:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:21,356 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-07 14:01:21,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 14:01:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-07 14:01:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-07 14:01:21,358 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:21,358 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:21,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-07 14:01:21,358 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:21,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:21,359 INFO L82 PathProgramCache]: Analyzing trace with hash -392261546, now seen corresponding path program 5 times [2020-07-07 14:01:21,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:21,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319349168] [2020-07-07 14:01:21,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:21,444 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:21,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319349168] [2020-07-07 14:01:21,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:21,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-07 14:01:21,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528354674] [2020-07-07 14:01:21,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 14:01:21,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:21,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 14:01:21,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-07 14:01:21,446 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 9 states. [2020-07-07 14:01:21,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:21,561 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-07-07 14:01:21,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 14:01:21,562 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-07-07 14:01:21,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:21,563 INFO L225 Difference]: With dead ends: 95 [2020-07-07 14:01:21,563 INFO L226 Difference]: Without dead ends: 79 [2020-07-07 14:01:21,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-07-07 14:01:21,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-07 14:01:21,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-07-07 14:01:21,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-07 14:01:21,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-07 14:01:21,574 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2020-07-07 14:01:21,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:21,574 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-07 14:01:21,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 14:01:21,574 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-07 14:01:21,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-07 14:01:21,575 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:21,575 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:21,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-07 14:01:21,576 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:21,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:21,576 INFO L82 PathProgramCache]: Analyzing trace with hash -384565031, now seen corresponding path program 5 times [2020-07-07 14:01:21,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:21,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1112131929] [2020-07-07 14:01:21,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:21,757 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:21,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1112131929] [2020-07-07 14:01:21,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:21,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-07 14:01:21,758 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776953112] [2020-07-07 14:01:21,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 14:01:21,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:21,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 14:01:21,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-07-07 14:01:21,759 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 15 states. [2020-07-07 14:01:21,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:21,987 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-07-07 14:01:21,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 14:01:21,987 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-07-07 14:01:21,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:21,988 INFO L225 Difference]: With dead ends: 82 [2020-07-07 14:01:21,988 INFO L226 Difference]: Without dead ends: 75 [2020-07-07 14:01:21,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-07-07 14:01:21,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-07 14:01:21,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-07-07 14:01:21,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-07 14:01:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-07 14:01:21,998 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 62 [2020-07-07 14:01:21,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:21,998 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-07 14:01:21,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 14:01:21,999 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-07 14:01:21,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-07 14:01:21,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:22,000 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:22,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-07 14:01:22,000 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:22,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:22,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1192623616, now seen corresponding path program 6 times [2020-07-07 14:01:22,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:22,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519425679] [2020-07-07 14:01:22,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:22,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:22,089 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:22,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519425679] [2020-07-07 14:01:22,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:22,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-07 14:01:22,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535662637] [2020-07-07 14:01:22,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 14:01:22,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:22,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 14:01:22,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-07 14:01:22,091 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 10 states. [2020-07-07 14:01:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:22,217 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2020-07-07 14:01:22,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 14:01:22,218 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-07-07 14:01:22,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:22,219 INFO L225 Difference]: With dead ends: 104 [2020-07-07 14:01:22,219 INFO L226 Difference]: Without dead ends: 88 [2020-07-07 14:01:22,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-07-07 14:01:22,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-07 14:01:22,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-07-07 14:01:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-07 14:01:22,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-07-07 14:01:22,229 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 69 [2020-07-07 14:01:22,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:22,229 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-07-07 14:01:22,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 14:01:22,229 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-07-07 14:01:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-07 14:01:22,230 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:22,230 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:22,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-07 14:01:22,230 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:22,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:22,231 INFO L82 PathProgramCache]: Analyzing trace with hash -733368317, now seen corresponding path program 6 times [2020-07-07 14:01:22,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:22,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126072434] [2020-07-07 14:01:22,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:22,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:22,478 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:22,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126072434] [2020-07-07 14:01:22,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:22,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-07-07 14:01:22,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958304404] [2020-07-07 14:01:22,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 14:01:22,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:22,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 14:01:22,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-07-07 14:01:22,480 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 17 states. [2020-07-07 14:01:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:22,840 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-07-07 14:01:22,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 14:01:22,840 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-07-07 14:01:22,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:22,841 INFO L225 Difference]: With dead ends: 91 [2020-07-07 14:01:22,841 INFO L226 Difference]: Without dead ends: 84 [2020-07-07 14:01:22,842 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-07-07 14:01:22,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-07 14:01:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-07-07 14:01:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-07 14:01:22,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-07-07 14:01:22,853 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 71 [2020-07-07 14:01:22,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:22,853 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-07-07 14:01:22,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 14:01:22,853 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-07-07 14:01:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-07 14:01:22,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:22,854 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:22,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-07 14:01:22,854 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:22,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:22,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1330458730, now seen corresponding path program 7 times [2020-07-07 14:01:22,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:22,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587561798] [2020-07-07 14:01:22,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:22,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:22,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:22,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:22,946 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:22,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587561798] [2020-07-07 14:01:22,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:22,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-07-07 14:01:22,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16384222] [2020-07-07 14:01:22,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 14:01:22,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:22,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 14:01:22,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-07 14:01:22,948 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 11 states. [2020-07-07 14:01:23,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:23,105 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-07-07 14:01:23,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 14:01:23,105 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2020-07-07 14:01:23,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:23,106 INFO L225 Difference]: With dead ends: 113 [2020-07-07 14:01:23,106 INFO L226 Difference]: Without dead ends: 97 [2020-07-07 14:01:23,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-07-07 14:01:23,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-07 14:01:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-07-07 14:01:23,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-07 14:01:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-07-07 14:01:23,119 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 78 [2020-07-07 14:01:23,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:23,119 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-07-07 14:01:23,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 14:01:23,119 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-07-07 14:01:23,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-07 14:01:23,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:23,120 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:23,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-07 14:01:23,120 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:23,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:23,121 INFO L82 PathProgramCache]: Analyzing trace with hash -48926695, now seen corresponding path program 7 times [2020-07-07 14:01:23,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:23,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59782641] [2020-07-07 14:01:23,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:23,355 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:23,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59782641] [2020-07-07 14:01:23,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:23,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-07-07 14:01:23,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519635572] [2020-07-07 14:01:23,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 14:01:23,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:23,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 14:01:23,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-07-07 14:01:23,358 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 19 states. [2020-07-07 14:01:23,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:23,795 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-07-07 14:01:23,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 14:01:23,795 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2020-07-07 14:01:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:23,796 INFO L225 Difference]: With dead ends: 100 [2020-07-07 14:01:23,796 INFO L226 Difference]: Without dead ends: 93 [2020-07-07 14:01:23,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2020-07-07 14:01:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-07 14:01:23,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2020-07-07 14:01:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-07 14:01:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-07-07 14:01:23,820 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 80 [2020-07-07 14:01:23,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:23,820 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-07-07 14:01:23,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 14:01:23,821 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-07-07 14:01:23,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-07-07 14:01:23,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:23,821 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:23,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-07 14:01:23,822 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:23,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:23,824 INFO L82 PathProgramCache]: Analyzing trace with hash -326571328, now seen corresponding path program 8 times [2020-07-07 14:01:23,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:23,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33539822] [2020-07-07 14:01:23,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:23,935 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:23,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33539822] [2020-07-07 14:01:23,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:23,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-07-07 14:01:23,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286042116] [2020-07-07 14:01:23,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 14:01:23,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:23,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 14:01:23,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-07 14:01:23,937 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 12 states. [2020-07-07 14:01:24,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:24,104 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-07-07 14:01:24,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 14:01:24,104 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-07-07 14:01:24,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:24,105 INFO L225 Difference]: With dead ends: 122 [2020-07-07 14:01:24,106 INFO L226 Difference]: Without dead ends: 106 [2020-07-07 14:01:24,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2020-07-07 14:01:24,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-07 14:01:24,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2020-07-07 14:01:24,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-07 14:01:24,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-07-07 14:01:24,119 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 87 [2020-07-07 14:01:24,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:24,119 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-07-07 14:01:24,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 14:01:24,120 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-07-07 14:01:24,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-07-07 14:01:24,120 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:24,121 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:24,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-07 14:01:24,121 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:24,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:24,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1680774973, now seen corresponding path program 8 times [2020-07-07 14:01:24,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:24,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481311617] [2020-07-07 14:01:24,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:24,379 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:24,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481311617] [2020-07-07 14:01:24,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:24,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-07-07 14:01:24,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442531923] [2020-07-07 14:01:24,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 14:01:24,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:24,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 14:01:24,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-07-07 14:01:24,382 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 21 states. [2020-07-07 14:01:24,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:24,821 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2020-07-07 14:01:24,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 14:01:24,822 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2020-07-07 14:01:24,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:24,823 INFO L225 Difference]: With dead ends: 109 [2020-07-07 14:01:24,823 INFO L226 Difference]: Without dead ends: 102 [2020-07-07 14:01:24,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 14:01:24,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-07 14:01:24,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-07-07 14:01:24,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-07 14:01:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-07-07 14:01:24,839 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 89 [2020-07-07 14:01:24,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:24,839 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-07-07 14:01:24,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 14:01:24,839 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-07-07 14:01:24,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-07 14:01:24,843 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:24,843 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:24,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-07 14:01:24,844 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:24,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:24,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1953349334, now seen corresponding path program 9 times [2020-07-07 14:01:24,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:24,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631503823] [2020-07-07 14:01:24,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:24,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:24,998 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:24,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631503823] [2020-07-07 14:01:24,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:24,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-07-07 14:01:24,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758896761] [2020-07-07 14:01:24,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 14:01:24,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:25,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 14:01:25,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-07 14:01:25,001 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 13 states. [2020-07-07 14:01:25,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:25,191 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2020-07-07 14:01:25,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-07 14:01:25,191 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-07 14:01:25,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:25,192 INFO L225 Difference]: With dead ends: 131 [2020-07-07 14:01:25,192 INFO L226 Difference]: Without dead ends: 115 [2020-07-07 14:01:25,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2020-07-07 14:01:25,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-07 14:01:25,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2020-07-07 14:01:25,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-07 14:01:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-07-07 14:01:25,209 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 96 [2020-07-07 14:01:25,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:25,209 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-07-07 14:01:25,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 14:01:25,209 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-07-07 14:01:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-07-07 14:01:25,210 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:25,210 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:25,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-07 14:01:25,211 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:25,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:25,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1110339751, now seen corresponding path program 9 times [2020-07-07 14:01:25,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:25,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109345905] [2020-07-07 14:01:25,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:25,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:25,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:25,569 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:25,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109345905] [2020-07-07 14:01:25,571 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:25,571 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-07-07 14:01:25,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486757039] [2020-07-07 14:01:25,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-07 14:01:25,572 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:25,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-07 14:01:25,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-07-07 14:01:25,574 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 23 states. [2020-07-07 14:01:26,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:26,187 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2020-07-07 14:01:26,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-07 14:01:26,188 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 98 [2020-07-07 14:01:26,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:26,189 INFO L225 Difference]: With dead ends: 118 [2020-07-07 14:01:26,190 INFO L226 Difference]: Without dead ends: 111 [2020-07-07 14:01:26,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2020-07-07 14:01:26,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-07-07 14:01:26,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-07-07 14:01:26,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-07 14:01:26,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-07-07 14:01:26,213 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 98 [2020-07-07 14:01:26,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:26,213 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-07-07 14:01:26,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-07 14:01:26,214 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-07-07 14:01:26,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-07-07 14:01:26,215 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:26,215 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:26,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-07 14:01:26,215 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:26,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1560748928, now seen corresponding path program 10 times [2020-07-07 14:01:26,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:26,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162323352] [2020-07-07 14:01:26,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:26,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:26,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:26,386 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:26,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162323352] [2020-07-07 14:01:26,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:26,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-07-07 14:01:26,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533849414] [2020-07-07 14:01:26,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 14:01:26,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:26,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 14:01:26,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-07 14:01:26,389 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 14 states. [2020-07-07 14:01:26,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:26,692 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2020-07-07 14:01:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-07 14:01:26,693 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 105 [2020-07-07 14:01:26,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:26,695 INFO L225 Difference]: With dead ends: 140 [2020-07-07 14:01:26,695 INFO L226 Difference]: Without dead ends: 124 [2020-07-07 14:01:26,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2020-07-07 14:01:26,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-07 14:01:26,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2020-07-07 14:01:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-07 14:01:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-07-07 14:01:26,718 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 105 [2020-07-07 14:01:26,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:26,718 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-07-07 14:01:26,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 14:01:26,719 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-07-07 14:01:26,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-07 14:01:26,721 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:26,721 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:26,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-07 14:01:26,722 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:26,722 INFO L82 PathProgramCache]: Analyzing trace with hash -442207869, now seen corresponding path program 10 times [2020-07-07 14:01:26,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:26,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245803275] [2020-07-07 14:01:26,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:27,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:27,189 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:27,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245803275] [2020-07-07 14:01:27,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:27,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-07-07 14:01:27,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323744168] [2020-07-07 14:01:27,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-07 14:01:27,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:27,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-07 14:01:27,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-07-07 14:01:27,201 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 25 states. [2020-07-07 14:01:27,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:27,814 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2020-07-07 14:01:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-07 14:01:27,815 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 107 [2020-07-07 14:01:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:27,816 INFO L225 Difference]: With dead ends: 127 [2020-07-07 14:01:27,817 INFO L226 Difference]: Without dead ends: 120 [2020-07-07 14:01:27,818 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 14:01:27,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-07 14:01:27,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-07-07 14:01:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-07 14:01:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-07-07 14:01:27,837 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 107 [2020-07-07 14:01:27,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:27,837 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-07-07 14:01:27,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-07 14:01:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-07-07 14:01:27,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-07 14:01:27,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:27,839 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:27,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-07 14:01:27,839 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:27,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:27,839 INFO L82 PathProgramCache]: Analyzing trace with hash -108831210, now seen corresponding path program 11 times [2020-07-07 14:01:27,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:27,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879933290] [2020-07-07 14:01:27,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:27,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:28,003 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:28,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879933290] [2020-07-07 14:01:28,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:28,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-07-07 14:01:28,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535786940] [2020-07-07 14:01:28,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 14:01:28,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:28,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 14:01:28,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-07 14:01:28,006 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 15 states. [2020-07-07 14:01:28,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:28,275 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2020-07-07 14:01:28,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-07 14:01:28,275 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 114 [2020-07-07 14:01:28,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:28,277 INFO L225 Difference]: With dead ends: 149 [2020-07-07 14:01:28,277 INFO L226 Difference]: Without dead ends: 133 [2020-07-07 14:01:28,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2020-07-07 14:01:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-07 14:01:28,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2020-07-07 14:01:28,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-07 14:01:28,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2020-07-07 14:01:28,299 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 114 [2020-07-07 14:01:28,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:28,299 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2020-07-07 14:01:28,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 14:01:28,300 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2020-07-07 14:01:28,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-07-07 14:01:28,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:28,301 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:28,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-07 14:01:28,301 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:28,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:28,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1409048217, now seen corresponding path program 11 times [2020-07-07 14:01:28,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:28,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346871057] [2020-07-07 14:01:28,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:28,735 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:28,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346871057] [2020-07-07 14:01:28,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:28,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-07-07 14:01:28,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034441669] [2020-07-07 14:01:28,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-07 14:01:28,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:28,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-07 14:01:28,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-07-07 14:01:28,739 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 27 states. [2020-07-07 14:01:29,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:29,373 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2020-07-07 14:01:29,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-07 14:01:29,374 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 116 [2020-07-07 14:01:29,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:29,375 INFO L225 Difference]: With dead ends: 136 [2020-07-07 14:01:29,375 INFO L226 Difference]: Without dead ends: 129 [2020-07-07 14:01:29,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=2000, Unknown=0, NotChecked=0, Total=2162 [2020-07-07 14:01:29,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-07-07 14:01:29,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2020-07-07 14:01:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-07 14:01:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2020-07-07 14:01:29,392 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 116 [2020-07-07 14:01:29,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:29,392 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2020-07-07 14:01:29,392 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-07 14:01:29,392 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2020-07-07 14:01:29,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-07 14:01:29,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:29,394 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:29,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-07 14:01:29,394 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:29,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:29,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1865460800, now seen corresponding path program 12 times [2020-07-07 14:01:29,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:29,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168997120] [2020-07-07 14:01:29,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:29,554 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:29,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168997120] [2020-07-07 14:01:29,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:29,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-07-07 14:01:29,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391925815] [2020-07-07 14:01:29,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 14:01:29,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:29,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 14:01:29,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-07 14:01:29,556 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 16 states. [2020-07-07 14:01:29,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:29,851 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-07-07 14:01:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-07 14:01:29,851 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 123 [2020-07-07 14:01:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:29,853 INFO L225 Difference]: With dead ends: 158 [2020-07-07 14:01:29,853 INFO L226 Difference]: Without dead ends: 142 [2020-07-07 14:01:29,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2020-07-07 14:01:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-07 14:01:29,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 132. [2020-07-07 14:01:29,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-07 14:01:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2020-07-07 14:01:29,872 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 123 [2020-07-07 14:01:29,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:29,873 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2020-07-07 14:01:29,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 14:01:29,873 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2020-07-07 14:01:29,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-07-07 14:01:29,874 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:29,874 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:29,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-07 14:01:29,875 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:29,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:29,875 INFO L82 PathProgramCache]: Analyzing trace with hash 328124995, now seen corresponding path program 12 times [2020-07-07 14:01:29,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:29,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1658337552] [2020-07-07 14:01:29,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:29,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:30,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:30,400 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:30,400 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1658337552] [2020-07-07 14:01:30,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:30,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-07-07 14:01:30,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985391588] [2020-07-07 14:01:30,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-07 14:01:30,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:30,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-07 14:01:30,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2020-07-07 14:01:30,402 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 29 states. [2020-07-07 14:01:31,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:31,188 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2020-07-07 14:01:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-07 14:01:31,188 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 125 [2020-07-07 14:01:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:31,190 INFO L225 Difference]: With dead ends: 145 [2020-07-07 14:01:31,191 INFO L226 Difference]: Without dead ends: 138 [2020-07-07 14:01:31,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=2373, Unknown=0, NotChecked=0, Total=2550 [2020-07-07 14:01:31,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-07 14:01:31,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2020-07-07 14:01:31,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-07-07 14:01:31,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2020-07-07 14:01:31,211 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 125 [2020-07-07 14:01:31,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:31,211 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2020-07-07 14:01:31,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-07 14:01:31,211 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2020-07-07 14:01:31,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-07-07 14:01:31,213 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:31,213 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:31,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-07 14:01:31,213 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:31,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:31,214 INFO L82 PathProgramCache]: Analyzing trace with hash -2136494762, now seen corresponding path program 13 times [2020-07-07 14:01:31,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:31,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689766594] [2020-07-07 14:01:31,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:31,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:31,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:31,399 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:31,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689766594] [2020-07-07 14:01:31,400 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:31,400 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-07-07 14:01:31,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593323540] [2020-07-07 14:01:31,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 14:01:31,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:31,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 14:01:31,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-07-07 14:01:31,401 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 17 states. [2020-07-07 14:01:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:31,683 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2020-07-07 14:01:31,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-07 14:01:31,684 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 132 [2020-07-07 14:01:31,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:31,685 INFO L225 Difference]: With dead ends: 167 [2020-07-07 14:01:31,685 INFO L226 Difference]: Without dead ends: 151 [2020-07-07 14:01:31,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-07-07 14:01:31,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-07 14:01:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2020-07-07 14:01:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-07 14:01:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-07-07 14:01:31,703 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 132 [2020-07-07 14:01:31,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:31,704 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-07-07 14:01:31,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 14:01:31,704 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-07-07 14:01:31,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-07 14:01:31,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:31,706 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:31,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-07 14:01:31,706 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:31,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:31,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1555440167, now seen corresponding path program 13 times [2020-07-07 14:01:31,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:31,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218744767] [2020-07-07 14:01:31,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:32,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:32,336 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:32,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218744767] [2020-07-07 14:01:32,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:32,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-07-07 14:01:32,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594647386] [2020-07-07 14:01:32,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-07 14:01:32,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:32,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-07 14:01:32,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2020-07-07 14:01:32,338 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 31 states. [2020-07-07 14:01:33,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:33,302 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2020-07-07 14:01:33,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-07 14:01:33,303 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 134 [2020-07-07 14:01:33,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:33,304 INFO L225 Difference]: With dead ends: 154 [2020-07-07 14:01:33,304 INFO L226 Difference]: Without dead ends: 147 [2020-07-07 14:01:33,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=2778, Unknown=0, NotChecked=0, Total=2970 [2020-07-07 14:01:33,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-07 14:01:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2020-07-07 14:01:33,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-07 14:01:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-07-07 14:01:33,324 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 134 [2020-07-07 14:01:33,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:33,325 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-07-07 14:01:33,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-07 14:01:33,325 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-07-07 14:01:33,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-07 14:01:33,326 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:33,326 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:33,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-07 14:01:33,327 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:33,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:33,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1825670400, now seen corresponding path program 14 times [2020-07-07 14:01:33,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:33,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659426457] [2020-07-07 14:01:33,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:33,520 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:33,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659426457] [2020-07-07 14:01:33,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:33,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-07-07 14:01:33,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134643810] [2020-07-07 14:01:33,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 14:01:33,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:33,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 14:01:33,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-07 14:01:33,522 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 18 states. [2020-07-07 14:01:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:33,849 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2020-07-07 14:01:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-07 14:01:33,850 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 141 [2020-07-07 14:01:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:33,851 INFO L225 Difference]: With dead ends: 176 [2020-07-07 14:01:33,851 INFO L226 Difference]: Without dead ends: 160 [2020-07-07 14:01:33,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 14:01:33,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-07 14:01:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2020-07-07 14:01:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-07 14:01:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2020-07-07 14:01:33,868 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 141 [2020-07-07 14:01:33,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:33,868 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2020-07-07 14:01:33,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 14:01:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2020-07-07 14:01:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-07-07 14:01:33,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:33,870 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:33,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-07 14:01:33,870 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:33,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:33,871 INFO L82 PathProgramCache]: Analyzing trace with hash 744256259, now seen corresponding path program 14 times [2020-07-07 14:01:33,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:33,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180573547] [2020-07-07 14:01:33,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:34,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:34,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:34,471 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:34,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180573547] [2020-07-07 14:01:34,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:34,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-07-07 14:01:34,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727850430] [2020-07-07 14:01:34,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-07 14:01:34,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:34,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-07 14:01:34,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 14:01:34,473 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 33 states. [2020-07-07 14:01:35,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:35,559 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2020-07-07 14:01:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-07 14:01:35,559 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 143 [2020-07-07 14:01:35,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:35,561 INFO L225 Difference]: With dead ends: 163 [2020-07-07 14:01:35,561 INFO L226 Difference]: Without dead ends: 156 [2020-07-07 14:01:35,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=207, Invalid=3215, Unknown=0, NotChecked=0, Total=3422 [2020-07-07 14:01:35,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-07 14:01:35,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-07-07 14:01:35,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-07 14:01:35,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-07-07 14:01:35,580 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 143 [2020-07-07 14:01:35,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:35,581 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-07-07 14:01:35,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-07 14:01:35,581 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-07-07 14:01:35,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-07 14:01:35,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:35,582 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:35,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-07 14:01:35,582 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:35,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:35,583 INFO L82 PathProgramCache]: Analyzing trace with hash 93236374, now seen corresponding path program 15 times [2020-07-07 14:01:35,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:35,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86307041] [2020-07-07 14:01:35,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:35,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:35,845 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:35,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86307041] [2020-07-07 14:01:35,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:35,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-07-07 14:01:35,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338939125] [2020-07-07 14:01:35,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 14:01:35,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:35,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 14:01:35,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-07 14:01:35,847 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 19 states. [2020-07-07 14:01:36,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:36,223 INFO L93 Difference]: Finished difference Result 185 states and 189 transitions. [2020-07-07 14:01:36,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-07 14:01:36,223 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 150 [2020-07-07 14:01:36,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:36,225 INFO L225 Difference]: With dead ends: 185 [2020-07-07 14:01:36,225 INFO L226 Difference]: Without dead ends: 169 [2020-07-07 14:01:36,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 14:01:36,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-07 14:01:36,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2020-07-07 14:01:36,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-07 14:01:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2020-07-07 14:01:36,242 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 150 [2020-07-07 14:01:36,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:36,243 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2020-07-07 14:01:36,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 14:01:36,243 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2020-07-07 14:01:36,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-07-07 14:01:36,244 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:36,244 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:36,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-07-07 14:01:36,245 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:36,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:36,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1972499175, now seen corresponding path program 15 times [2020-07-07 14:01:36,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:36,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039646129] [2020-07-07 14:01:36,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:36,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:36,934 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:36,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039646129] [2020-07-07 14:01:36,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:36,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-07-07 14:01:36,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126658438] [2020-07-07 14:01:36,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-07 14:01:36,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:36,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-07 14:01:36,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 14:01:36,936 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 35 states. [2020-07-07 14:01:38,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:38,146 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2020-07-07 14:01:38,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-07 14:01:38,147 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 152 [2020-07-07 14:01:38,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:38,149 INFO L225 Difference]: With dead ends: 172 [2020-07-07 14:01:38,149 INFO L226 Difference]: Without dead ends: 165 [2020-07-07 14:01:38,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=222, Invalid=3684, Unknown=0, NotChecked=0, Total=3906 [2020-07-07 14:01:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-07 14:01:38,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-07-07 14:01:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-07 14:01:38,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-07-07 14:01:38,169 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 152 [2020-07-07 14:01:38,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:38,169 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-07-07 14:01:38,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-07 14:01:38,170 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-07-07 14:01:38,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-07-07 14:01:38,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:38,170 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:38,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-07-07 14:01:38,171 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:38,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:38,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1152757184, now seen corresponding path program 16 times [2020-07-07 14:01:38,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:38,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838294240] [2020-07-07 14:01:38,171 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:38,472 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:38,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838294240] [2020-07-07 14:01:38,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:38,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-07-07 14:01:38,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242098479] [2020-07-07 14:01:38,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 14:01:38,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:38,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 14:01:38,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-07 14:01:38,474 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 20 states. [2020-07-07 14:01:38,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:38,850 INFO L93 Difference]: Finished difference Result 194 states and 198 transitions. [2020-07-07 14:01:38,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-07 14:01:38,850 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 159 [2020-07-07 14:01:38,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:38,852 INFO L225 Difference]: With dead ends: 194 [2020-07-07 14:01:38,852 INFO L226 Difference]: Without dead ends: 178 [2020-07-07 14:01:38,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-07-07 14:01:38,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-07 14:01:38,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2020-07-07 14:01:38,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-07 14:01:38,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2020-07-07 14:01:38,879 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 159 [2020-07-07 14:01:38,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:38,880 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2020-07-07 14:01:38,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 14:01:38,880 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2020-07-07 14:01:38,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-07-07 14:01:38,881 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:38,881 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:38,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-07-07 14:01:38,881 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:38,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:38,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1680249917, now seen corresponding path program 16 times [2020-07-07 14:01:38,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:38,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410860457] [2020-07-07 14:01:38,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:38,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:39,616 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:39,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410860457] [2020-07-07 14:01:39,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:39,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-07-07 14:01:39,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95677511] [2020-07-07 14:01:39,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-07 14:01:39,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:39,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-07 14:01:39,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2020-07-07 14:01:39,618 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 37 states. [2020-07-07 14:01:40,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:40,977 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2020-07-07 14:01:40,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-07 14:01:40,978 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 161 [2020-07-07 14:01:40,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:40,979 INFO L225 Difference]: With dead ends: 181 [2020-07-07 14:01:40,980 INFO L226 Difference]: Without dead ends: 174 [2020-07-07 14:01:40,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=237, Invalid=4185, Unknown=0, NotChecked=0, Total=4422 [2020-07-07 14:01:40,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-07-07 14:01:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2020-07-07 14:01:41,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-07 14:01:41,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2020-07-07 14:01:41,013 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 161 [2020-07-07 14:01:41,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:41,014 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2020-07-07 14:01:41,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-07 14:01:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2020-07-07 14:01:41,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-07 14:01:41,015 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:41,015 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:41,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-07-07 14:01:41,016 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:41,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:41,016 INFO L82 PathProgramCache]: Analyzing trace with hash 2129419222, now seen corresponding path program 17 times [2020-07-07 14:01:41,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:41,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434941762] [2020-07-07 14:01:41,017 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:41,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:41,326 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:41,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434941762] [2020-07-07 14:01:41,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:41,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-07-07 14:01:41,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704173553] [2020-07-07 14:01:41,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 14:01:41,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:41,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 14:01:41,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-07 14:01:41,329 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 21 states. [2020-07-07 14:01:41,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:41,763 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2020-07-07 14:01:41,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-07 14:01:41,763 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 168 [2020-07-07 14:01:41,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:41,765 INFO L225 Difference]: With dead ends: 203 [2020-07-07 14:01:41,765 INFO L226 Difference]: Without dead ends: 187 [2020-07-07 14:01:41,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2020-07-07 14:01:41,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-07 14:01:41,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2020-07-07 14:01:41,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-07 14:01:41,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2020-07-07 14:01:41,796 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 168 [2020-07-07 14:01:41,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:41,796 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2020-07-07 14:01:41,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 14:01:41,796 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2020-07-07 14:01:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-07-07 14:01:41,798 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:41,798 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:41,798 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-07-07 14:01:41,798 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:41,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:41,799 INFO L82 PathProgramCache]: Analyzing trace with hash 589098073, now seen corresponding path program 17 times [2020-07-07 14:01:41,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:41,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439582875] [2020-07-07 14:01:41,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:42,627 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:42,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439582875] [2020-07-07 14:01:42,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:42,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-07-07 14:01:42,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576013361] [2020-07-07 14:01:42,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-07 14:01:42,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:42,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-07 14:01:42,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1390, Unknown=0, NotChecked=0, Total=1482 [2020-07-07 14:01:42,629 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 39 states. [2020-07-07 14:01:44,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:44,266 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2020-07-07 14:01:44,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-07 14:01:44,267 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 170 [2020-07-07 14:01:44,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:44,269 INFO L225 Difference]: With dead ends: 190 [2020-07-07 14:01:44,272 INFO L226 Difference]: Without dead ends: 183 [2020-07-07 14:01:44,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=252, Invalid=4718, Unknown=0, NotChecked=0, Total=4970 [2020-07-07 14:01:44,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-07-07 14:01:44,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2020-07-07 14:01:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-07-07 14:01:44,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2020-07-07 14:01:44,323 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 170 [2020-07-07 14:01:44,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:44,323 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2020-07-07 14:01:44,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-07 14:01:44,324 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2020-07-07 14:01:44,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-07 14:01:44,325 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:44,325 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:44,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-07-07 14:01:44,325 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:44,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:44,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1252599424, now seen corresponding path program 18 times [2020-07-07 14:01:44,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:44,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610351084] [2020-07-07 14:01:44,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:44,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:44,742 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:44,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610351084] [2020-07-07 14:01:44,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:44,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-07-07 14:01:44,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66369057] [2020-07-07 14:01:44,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 14:01:44,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:44,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 14:01:44,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-07 14:01:44,749 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 22 states. [2020-07-07 14:01:45,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:45,182 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2020-07-07 14:01:45,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-07 14:01:45,183 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 177 [2020-07-07 14:01:45,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:45,185 INFO L225 Difference]: With dead ends: 212 [2020-07-07 14:01:45,185 INFO L226 Difference]: Without dead ends: 196 [2020-07-07 14:01:45,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2020-07-07 14:01:45,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-07-07 14:01:45,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 186. [2020-07-07 14:01:45,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-07-07 14:01:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2020-07-07 14:01:45,214 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 177 [2020-07-07 14:01:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:45,215 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2020-07-07 14:01:45,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 14:01:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2020-07-07 14:01:45,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-07-07 14:01:45,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:45,216 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:45,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-07-07 14:01:45,217 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:45,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:45,217 INFO L82 PathProgramCache]: Analyzing trace with hash -221137789, now seen corresponding path program 18 times [2020-07-07 14:01:45,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:45,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923308525] [2020-07-07 14:01:45,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:45,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:46,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:46,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:46,163 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:46,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923308525] [2020-07-07 14:01:46,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:46,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-07-07 14:01:46,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397542191] [2020-07-07 14:01:46,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-07 14:01:46,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:46,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-07 14:01:46,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1543, Unknown=0, NotChecked=0, Total=1640 [2020-07-07 14:01:46,165 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 41 states. [2020-07-07 14:01:47,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:47,800 INFO L93 Difference]: Finished difference Result 199 states and 200 transitions. [2020-07-07 14:01:47,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-07 14:01:47,801 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 179 [2020-07-07 14:01:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:47,803 INFO L225 Difference]: With dead ends: 199 [2020-07-07 14:01:47,803 INFO L226 Difference]: Without dead ends: 192 [2020-07-07 14:01:47,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=267, Invalid=5283, Unknown=0, NotChecked=0, Total=5550 [2020-07-07 14:01:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-07 14:01:47,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2020-07-07 14:01:47,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-07 14:01:47,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2020-07-07 14:01:47,832 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 179 [2020-07-07 14:01:47,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:47,832 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2020-07-07 14:01:47,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-07 14:01:47,832 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2020-07-07 14:01:47,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-07 14:01:47,833 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:47,834 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:47,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-07-07 14:01:47,834 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:47,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:47,834 INFO L82 PathProgramCache]: Analyzing trace with hash 510966550, now seen corresponding path program 19 times [2020-07-07 14:01:47,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:47,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820243345] [2020-07-07 14:01:47,835 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:48,182 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:48,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820243345] [2020-07-07 14:01:48,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:48,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-07-07 14:01:48,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445043106] [2020-07-07 14:01:48,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-07 14:01:48,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:48,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-07 14:01:48,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-07 14:01:48,184 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 23 states. [2020-07-07 14:01:48,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:48,700 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2020-07-07 14:01:48,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-07 14:01:48,700 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 186 [2020-07-07 14:01:48,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:48,702 INFO L225 Difference]: With dead ends: 221 [2020-07-07 14:01:48,702 INFO L226 Difference]: Without dead ends: 205 [2020-07-07 14:01:48,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 14:01:48,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-07 14:01:48,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 195. [2020-07-07 14:01:48,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-07-07 14:01:48,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2020-07-07 14:01:48,735 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 186 [2020-07-07 14:01:48,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:48,735 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2020-07-07 14:01:48,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-07 14:01:48,735 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2020-07-07 14:01:48,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-07-07 14:01:48,736 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:48,736 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:48,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-07-07 14:01:48,737 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:48,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:48,737 INFO L82 PathProgramCache]: Analyzing trace with hash 34241433, now seen corresponding path program 19 times [2020-07-07 14:01:48,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:48,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902441352] [2020-07-07 14:01:48,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:48,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:49,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:49,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:49,768 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:49,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902441352] [2020-07-07 14:01:49,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:49,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-07-07 14:01:49,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708670629] [2020-07-07 14:01:49,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-07 14:01:49,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:49,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-07 14:01:49,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1704, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 14:01:49,770 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 43 states. [2020-07-07 14:01:51,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:51,575 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2020-07-07 14:01:51,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-07 14:01:51,576 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 188 [2020-07-07 14:01:51,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:51,578 INFO L225 Difference]: With dead ends: 208 [2020-07-07 14:01:51,578 INFO L226 Difference]: Without dead ends: 201 [2020-07-07 14:01:51,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=282, Invalid=5880, Unknown=0, NotChecked=0, Total=6162 [2020-07-07 14:01:51,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-07-07 14:01:51,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-07-07 14:01:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-07 14:01:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2020-07-07 14:01:51,613 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 188 [2020-07-07 14:01:51,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:51,613 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2020-07-07 14:01:51,613 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-07 14:01:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2020-07-07 14:01:51,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-07 14:01:51,614 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:51,614 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:51,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-07-07 14:01:51,614 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:51,615 INFO L82 PathProgramCache]: Analyzing trace with hash -143134912, now seen corresponding path program 20 times [2020-07-07 14:01:51,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:51,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1084900164] [2020-07-07 14:01:51,615 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:51,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:51,989 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:51,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1084900164] [2020-07-07 14:01:51,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:51,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-07-07 14:01:51,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226356971] [2020-07-07 14:01:51,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 14:01:51,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:51,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 14:01:51,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-07 14:01:51,991 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 24 states. [2020-07-07 14:01:52,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:52,545 INFO L93 Difference]: Finished difference Result 230 states and 234 transitions. [2020-07-07 14:01:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-07 14:01:52,546 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 195 [2020-07-07 14:01:52,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:52,547 INFO L225 Difference]: With dead ends: 230 [2020-07-07 14:01:52,547 INFO L226 Difference]: Without dead ends: 214 [2020-07-07 14:01:52,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2020-07-07 14:01:52,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-07 14:01:52,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 204. [2020-07-07 14:01:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-07 14:01:52,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-07-07 14:01:52,578 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 195 [2020-07-07 14:01:52,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:52,578 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-07-07 14:01:52,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 14:01:52,579 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-07-07 14:01:52,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-07-07 14:01:52,580 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:52,580 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:52,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-07-07 14:01:52,580 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:52,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:52,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1492038333, now seen corresponding path program 20 times [2020-07-07 14:01:52,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:52,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450117273] [2020-07-07 14:01:52,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:53,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:53,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:53,672 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:53,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450117273] [2020-07-07 14:01:53,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:53,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-07-07 14:01:53,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162726757] [2020-07-07 14:01:53,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-07 14:01:53,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:53,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-07 14:01:53,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1873, Unknown=0, NotChecked=0, Total=1980 [2020-07-07 14:01:53,674 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 45 states. [2020-07-07 14:01:55,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:55,596 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2020-07-07 14:01:55,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-07 14:01:55,597 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 197 [2020-07-07 14:01:55,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:55,598 INFO L225 Difference]: With dead ends: 217 [2020-07-07 14:01:55,599 INFO L226 Difference]: Without dead ends: 210 [2020-07-07 14:01:55,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=297, Invalid=6509, Unknown=0, NotChecked=0, Total=6806 [2020-07-07 14:01:55,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-07 14:01:55,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-07-07 14:01:55,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-07-07 14:01:55,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2020-07-07 14:01:55,636 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 197 [2020-07-07 14:01:55,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:55,636 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2020-07-07 14:01:55,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-07 14:01:55,636 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2020-07-07 14:01:55,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-07-07 14:01:55,637 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:55,638 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:55,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-07-07 14:01:55,638 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:55,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:55,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1864644010, now seen corresponding path program 21 times [2020-07-07 14:01:55,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:55,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719950108] [2020-07-07 14:01:55,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:56,036 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:56,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719950108] [2020-07-07 14:01:56,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:56,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-07-07 14:01:56,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136272225] [2020-07-07 14:01:56,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-07 14:01:56,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:56,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-07 14:01:56,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-07-07 14:01:56,038 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 25 states. [2020-07-07 14:01:56,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:56,612 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2020-07-07 14:01:56,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-07 14:01:56,612 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 204 [2020-07-07 14:01:56,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:56,614 INFO L225 Difference]: With dead ends: 239 [2020-07-07 14:01:56,614 INFO L226 Difference]: Without dead ends: 223 [2020-07-07 14:01:56,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-07-07 14:01:56,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-07 14:01:56,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 213. [2020-07-07 14:01:56,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-07-07 14:01:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2020-07-07 14:01:56,649 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 204 [2020-07-07 14:01:56,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:56,650 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2020-07-07 14:01:56,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-07 14:01:56,650 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2020-07-07 14:01:56,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-07-07 14:01:56,651 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:56,651 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:56,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-07-07 14:01:56,652 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:56,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:56,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1995094745, now seen corresponding path program 21 times [2020-07-07 14:01:56,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:56,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814795639] [2020-07-07 14:01:56,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:56,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:57,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:57,872 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:57,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814795639] [2020-07-07 14:01:57,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:57,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-07-07 14:01:57,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490797568] [2020-07-07 14:01:57,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-07 14:01:57,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:57,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-07 14:01:57,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2050, Unknown=0, NotChecked=0, Total=2162 [2020-07-07 14:01:57,874 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand 47 states. [2020-07-07 14:02:00,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:00,003 INFO L93 Difference]: Finished difference Result 226 states and 227 transitions. [2020-07-07 14:02:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-07 14:02:00,003 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 206 [2020-07-07 14:02:00,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:00,006 INFO L225 Difference]: With dead ends: 226 [2020-07-07 14:02:00,006 INFO L226 Difference]: Without dead ends: 219 [2020-07-07 14:02:00,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=312, Invalid=7170, Unknown=0, NotChecked=0, Total=7482 [2020-07-07 14:02:00,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-07 14:02:00,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2020-07-07 14:02:00,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-07 14:02:00,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2020-07-07 14:02:00,046 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 206 [2020-07-07 14:02:00,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:00,047 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2020-07-07 14:02:00,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-07 14:02:00,047 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2020-07-07 14:02:00,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-07-07 14:02:00,048 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:00,048 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:00,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-07-07 14:02:00,049 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:00,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1460795392, now seen corresponding path program 22 times [2020-07-07 14:02:00,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:00,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364272277] [2020-07-07 14:02:00,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:00,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:00,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:00,492 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:00,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364272277] [2020-07-07 14:02:00,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:00,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-07-07 14:02:00,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644708922] [2020-07-07 14:02:00,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-07 14:02:00,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:00,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-07 14:02:00,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-07-07 14:02:00,494 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand 26 states. [2020-07-07 14:02:01,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:01,100 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2020-07-07 14:02:01,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-07-07 14:02:01,100 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 213 [2020-07-07 14:02:01,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:01,101 INFO L225 Difference]: With dead ends: 248 [2020-07-07 14:02:01,102 INFO L226 Difference]: Without dead ends: 232 [2020-07-07 14:02:01,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-07-07 14:02:01,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-07 14:02:01,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 222. [2020-07-07 14:02:01,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-07-07 14:02:01,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2020-07-07 14:02:01,139 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 213 [2020-07-07 14:02:01,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:01,139 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2020-07-07 14:02:01,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-07 14:02:01,139 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2020-07-07 14:02:01,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-07-07 14:02:01,140 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:01,140 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:01,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-07-07 14:02:01,141 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:01,141 INFO L82 PathProgramCache]: Analyzing trace with hash -748407293, now seen corresponding path program 22 times [2020-07-07 14:02:01,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:01,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940016552] [2020-07-07 14:02:01,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:02,494 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:02,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940016552] [2020-07-07 14:02:02,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:02,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-07-07 14:02:02,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953943475] [2020-07-07 14:02:02,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-07 14:02:02,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:02,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-07 14:02:02,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2235, Unknown=0, NotChecked=0, Total=2352 [2020-07-07 14:02:02,497 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 49 states. [2020-07-07 14:02:04,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:04,861 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2020-07-07 14:02:04,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-07-07 14:02:04,862 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 215 [2020-07-07 14:02:04,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:04,864 INFO L225 Difference]: With dead ends: 235 [2020-07-07 14:02:04,864 INFO L226 Difference]: Without dead ends: 228 [2020-07-07 14:02:04,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=327, Invalid=7863, Unknown=0, NotChecked=0, Total=8190 [2020-07-07 14:02:04,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-07 14:02:04,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2020-07-07 14:02:04,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-07-07 14:02:04,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2020-07-07 14:02:04,905 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 215 [2020-07-07 14:02:04,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:04,905 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2020-07-07 14:02:04,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-07 14:02:04,906 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2020-07-07 14:02:04,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-07-07 14:02:04,907 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:04,907 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:04,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-07-07 14:02:04,907 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:04,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:04,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1037404566, now seen corresponding path program 23 times [2020-07-07 14:02:04,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:04,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462252652] [2020-07-07 14:02:04,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:04,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:05,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:05,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:05,413 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:05,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462252652] [2020-07-07 14:02:05,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:05,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-07-07 14:02:05,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020413021] [2020-07-07 14:02:05,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-07 14:02:05,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:05,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-07 14:02:05,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-07-07 14:02:05,414 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand 27 states. [2020-07-07 14:02:06,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:06,103 INFO L93 Difference]: Finished difference Result 257 states and 261 transitions. [2020-07-07 14:02:06,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-07 14:02:06,108 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 222 [2020-07-07 14:02:06,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:06,109 INFO L225 Difference]: With dead ends: 257 [2020-07-07 14:02:06,109 INFO L226 Difference]: Without dead ends: 241 [2020-07-07 14:02:06,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2020-07-07 14:02:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-07-07 14:02:06,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2020-07-07 14:02:06,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-07-07 14:02:06,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2020-07-07 14:02:06,148 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 222 [2020-07-07 14:02:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:06,148 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2020-07-07 14:02:06,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-07 14:02:06,148 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2020-07-07 14:02:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-07-07 14:02:06,149 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:06,149 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:06,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-07-07 14:02:06,149 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:06,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:06,149 INFO L82 PathProgramCache]: Analyzing trace with hash -864966119, now seen corresponding path program 23 times [2020-07-07 14:02:06,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:06,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616603408] [2020-07-07 14:02:06,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:06,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:07,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:07,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:07,715 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:07,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616603408] [2020-07-07 14:02:07,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:07,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-07-07 14:02:07,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670524800] [2020-07-07 14:02:07,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-07 14:02:07,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:07,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-07 14:02:07,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2428, Unknown=0, NotChecked=0, Total=2550 [2020-07-07 14:02:07,721 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 51 states. [2020-07-07 14:02:10,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:10,253 INFO L93 Difference]: Finished difference Result 244 states and 245 transitions. [2020-07-07 14:02:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-07 14:02:10,254 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 224 [2020-07-07 14:02:10,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:10,255 INFO L225 Difference]: With dead ends: 244 [2020-07-07 14:02:10,256 INFO L226 Difference]: Without dead ends: 237 [2020-07-07 14:02:10,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2338 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=342, Invalid=8588, Unknown=0, NotChecked=0, Total=8930 [2020-07-07 14:02:10,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-07-07 14:02:10,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2020-07-07 14:02:10,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-07-07 14:02:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2020-07-07 14:02:10,295 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 224 [2020-07-07 14:02:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:10,295 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2020-07-07 14:02:10,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-07 14:02:10,296 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2020-07-07 14:02:10,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-07-07 14:02:10,297 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:10,297 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:10,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-07-07 14:02:10,297 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:10,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:10,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1641509056, now seen corresponding path program 24 times [2020-07-07 14:02:10,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:10,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134038326] [2020-07-07 14:02:10,298 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:10,768 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:10,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134038326] [2020-07-07 14:02:10,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:10,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-07-07 14:02:10,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666887493] [2020-07-07 14:02:10,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-07 14:02:10,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:10,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-07 14:02:10,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-07-07 14:02:10,770 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 28 states. [2020-07-07 14:02:11,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:11,484 INFO L93 Difference]: Finished difference Result 266 states and 270 transitions. [2020-07-07 14:02:11,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-07 14:02:11,485 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 231 [2020-07-07 14:02:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:11,486 INFO L225 Difference]: With dead ends: 266 [2020-07-07 14:02:11,486 INFO L226 Difference]: Without dead ends: 250 [2020-07-07 14:02:11,487 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-07-07 14:02:11,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-07 14:02:11,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 240. [2020-07-07 14:02:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-07-07 14:02:11,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2020-07-07 14:02:11,524 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 231 [2020-07-07 14:02:11,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:11,524 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2020-07-07 14:02:11,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-07 14:02:11,524 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2020-07-07 14:02:11,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-07-07 14:02:11,525 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:11,525 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:11,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-07-07 14:02:11,526 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:11,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:11,526 INFO L82 PathProgramCache]: Analyzing trace with hash -141136189, now seen corresponding path program 24 times [2020-07-07 14:02:11,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:11,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431824014] [2020-07-07 14:02:11,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:11,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:13,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:13,156 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:13,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431824014] [2020-07-07 14:02:13,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:13,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2020-07-07 14:02:13,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645805087] [2020-07-07 14:02:13,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-07 14:02:13,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:13,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-07 14:02:13,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2629, Unknown=0, NotChecked=0, Total=2756 [2020-07-07 14:02:13,158 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand 53 states. [2020-07-07 14:02:15,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:15,884 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2020-07-07 14:02:15,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-07 14:02:15,884 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 233 [2020-07-07 14:02:15,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:15,886 INFO L225 Difference]: With dead ends: 253 [2020-07-07 14:02:15,886 INFO L226 Difference]: Without dead ends: 246 [2020-07-07 14:02:15,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=357, Invalid=9345, Unknown=0, NotChecked=0, Total=9702 [2020-07-07 14:02:15,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-07 14:02:15,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-07-07 14:02:15,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-07-07 14:02:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2020-07-07 14:02:15,924 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 233 [2020-07-07 14:02:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:15,924 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2020-07-07 14:02:15,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-07 14:02:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2020-07-07 14:02:15,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-07 14:02:15,926 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:15,926 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:15,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-07-07 14:02:15,926 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:15,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:15,927 INFO L82 PathProgramCache]: Analyzing trace with hash -2011825962, now seen corresponding path program 25 times [2020-07-07 14:02:15,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:15,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216200453] [2020-07-07 14:02:15,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:16,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:16,476 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:16,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216200453] [2020-07-07 14:02:16,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:16,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-07-07 14:02:16,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224687278] [2020-07-07 14:02:16,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-07 14:02:16,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:16,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-07 14:02:16,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-07-07 14:02:16,477 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 29 states. [2020-07-07 14:02:17,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:17,265 INFO L93 Difference]: Finished difference Result 275 states and 279 transitions. [2020-07-07 14:02:17,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-07 14:02:17,266 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 240 [2020-07-07 14:02:17,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:17,268 INFO L225 Difference]: With dead ends: 275 [2020-07-07 14:02:17,268 INFO L226 Difference]: Without dead ends: 259 [2020-07-07 14:02:17,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-07-07 14:02:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-07-07 14:02:17,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 249. [2020-07-07 14:02:17,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-07-07 14:02:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2020-07-07 14:02:17,310 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 240 [2020-07-07 14:02:17,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:17,310 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2020-07-07 14:02:17,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-07 14:02:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2020-07-07 14:02:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-07-07 14:02:17,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:17,312 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:17,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-07-07 14:02:17,312 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:17,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:17,313 INFO L82 PathProgramCache]: Analyzing trace with hash -2007807655, now seen corresponding path program 25 times [2020-07-07 14:02:17,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:17,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485181704] [2020-07-07 14:02:17,313 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:19,053 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:19,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485181704] [2020-07-07 14:02:19,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:19,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2020-07-07 14:02:19,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818906570] [2020-07-07 14:02:19,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-07 14:02:19,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:19,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-07 14:02:19,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2838, Unknown=0, NotChecked=0, Total=2970 [2020-07-07 14:02:19,055 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand 55 states. [2020-07-07 14:02:22,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:22,045 INFO L93 Difference]: Finished difference Result 262 states and 263 transitions. [2020-07-07 14:02:22,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-07 14:02:22,046 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 242 [2020-07-07 14:02:22,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:22,048 INFO L225 Difference]: With dead ends: 262 [2020-07-07 14:02:22,048 INFO L226 Difference]: Without dead ends: 255 [2020-07-07 14:02:22,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2790 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=372, Invalid=10134, Unknown=0, NotChecked=0, Total=10506 [2020-07-07 14:02:22,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-07 14:02:22,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2020-07-07 14:02:22,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-07-07 14:02:22,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2020-07-07 14:02:22,089 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 242 [2020-07-07 14:02:22,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:22,090 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2020-07-07 14:02:22,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-07 14:02:22,090 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2020-07-07 14:02:22,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-07-07 14:02:22,091 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:22,091 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:22,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-07-07 14:02:22,092 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:22,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:22,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1979700864, now seen corresponding path program 26 times [2020-07-07 14:02:22,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:22,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1032912074] [2020-07-07 14:02:22,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:22,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:22,695 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:22,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1032912074] [2020-07-07 14:02:22,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:22,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-07-07 14:02:22,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333720132] [2020-07-07 14:02:22,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-07 14:02:22,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:22,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-07 14:02:22,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-07-07 14:02:22,697 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 30 states. [2020-07-07 14:02:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:23,522 INFO L93 Difference]: Finished difference Result 284 states and 288 transitions. [2020-07-07 14:02:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-07-07 14:02:23,523 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 249 [2020-07-07 14:02:23,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:23,524 INFO L225 Difference]: With dead ends: 284 [2020-07-07 14:02:23,524 INFO L226 Difference]: Without dead ends: 268 [2020-07-07 14:02:23,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-07-07 14:02:23,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-07-07 14:02:23,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 258. [2020-07-07 14:02:23,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-07-07 14:02:23,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2020-07-07 14:02:23,575 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 249 [2020-07-07 14:02:23,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:23,576 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2020-07-07 14:02:23,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-07 14:02:23,576 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2020-07-07 14:02:23,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-07-07 14:02:23,577 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:23,577 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:23,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-07-07 14:02:23,578 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:23,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:23,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1200359549, now seen corresponding path program 26 times [2020-07-07 14:02:23,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:23,579 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048306125] [2020-07-07 14:02:23,579 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:23,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:25,494 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:25,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048306125] [2020-07-07 14:02:25,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:25,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2020-07-07 14:02:25,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314273931] [2020-07-07 14:02:25,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-07 14:02:25,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:25,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-07 14:02:25,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=3055, Unknown=0, NotChecked=0, Total=3192 [2020-07-07 14:02:25,496 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 57 states. [2020-07-07 14:02:28,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:28,691 INFO L93 Difference]: Finished difference Result 271 states and 272 transitions. [2020-07-07 14:02:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-07-07 14:02:28,691 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 251 [2020-07-07 14:02:28,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:28,693 INFO L225 Difference]: With dead ends: 271 [2020-07-07 14:02:28,693 INFO L226 Difference]: Without dead ends: 264 [2020-07-07 14:02:28,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3031 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=387, Invalid=10955, Unknown=0, NotChecked=0, Total=11342 [2020-07-07 14:02:28,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-07 14:02:28,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 261. [2020-07-07 14:02:28,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-07-07 14:02:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2020-07-07 14:02:28,729 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 251 [2020-07-07 14:02:28,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:28,729 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2020-07-07 14:02:28,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-07 14:02:28,729 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2020-07-07 14:02:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-07-07 14:02:28,731 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:28,731 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:28,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-07-07 14:02:28,731 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:28,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:28,732 INFO L82 PathProgramCache]: Analyzing trace with hash 223418390, now seen corresponding path program 27 times [2020-07-07 14:02:28,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:28,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211798075] [2020-07-07 14:02:28,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:30,760 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:30,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211798075] [2020-07-07 14:02:30,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:30,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2020-07-07 14:02:30,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253734515] [2020-07-07 14:02:30,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-07-07 14:02:30,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:30,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-07-07 14:02:30,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=3280, Unknown=0, NotChecked=0, Total=3422 [2020-07-07 14:02:30,762 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand 59 states. [2020-07-07 14:02:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:34,208 INFO L93 Difference]: Finished difference Result 280 states and 282 transitions. [2020-07-07 14:02:34,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-07-07 14:02:34,209 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 258 [2020-07-07 14:02:34,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:34,210 INFO L225 Difference]: With dead ends: 280 [2020-07-07 14:02:34,211 INFO L226 Difference]: Without dead ends: 273 [2020-07-07 14:02:34,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=402, Invalid=11808, Unknown=0, NotChecked=0, Total=12210 [2020-07-07 14:02:34,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-07-07 14:02:34,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 270. [2020-07-07 14:02:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-07-07 14:02:34,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 272 transitions. [2020-07-07 14:02:34,250 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 272 transitions. Word has length 258 [2020-07-07 14:02:34,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:34,251 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 272 transitions. [2020-07-07 14:02:34,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-07-07 14:02:34,251 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 272 transitions. [2020-07-07 14:02:34,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-07-07 14:02:34,252 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:34,252 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 27, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:34,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-07-07 14:02:34,252 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:34,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:34,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1044595677, now seen corresponding path program 28 times [2020-07-07 14:02:34,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:34,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470125512] [2020-07-07 14:02:34,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:34,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:34,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:34,333 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:34,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470125512] [2020-07-07 14:02:34,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:34,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-07 14:02:34,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799778990] [2020-07-07 14:02:34,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-07 14:02:34,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:34,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-07 14:02:34,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 14:02:34,335 INFO L87 Difference]: Start difference. First operand 270 states and 272 transitions. Second operand 3 states. [2020-07-07 14:02:34,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:34,403 INFO L93 Difference]: Finished difference Result 288 states and 292 transitions. [2020-07-07 14:02:34,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-07 14:02:34,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 265 [2020-07-07 14:02:34,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:34,408 INFO L225 Difference]: With dead ends: 288 [2020-07-07 14:02:34,408 INFO L226 Difference]: Without dead ends: 271 [2020-07-07 14:02:34,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-07 14:02:34,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-07-07 14:02:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2020-07-07 14:02:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-07-07 14:02:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2020-07-07 14:02:34,479 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 265 [2020-07-07 14:02:34,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:34,480 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2020-07-07 14:02:34,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-07 14:02:34,480 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2020-07-07 14:02:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-07-07 14:02:34,481 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:34,482 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:34,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-07-07 14:02:34,484 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:34,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1372310976, now seen corresponding path program 29 times [2020-07-07 14:02:34,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:34,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480934625] [2020-07-07 14:02:34,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:35,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:35,187 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:35,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480934625] [2020-07-07 14:02:35,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:35,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-07-07 14:02:35,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642806247] [2020-07-07 14:02:35,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-07 14:02:35,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:35,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-07 14:02:35,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-07-07 14:02:35,189 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 32 states. [2020-07-07 14:02:36,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:36,191 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2020-07-07 14:02:36,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-07-07 14:02:36,192 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 267 [2020-07-07 14:02:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:36,194 INFO L225 Difference]: With dead ends: 295 [2020-07-07 14:02:36,194 INFO L226 Difference]: Without dead ends: 287 [2020-07-07 14:02:36,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-07-07 14:02:36,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-07-07 14:02:36,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 277. [2020-07-07 14:02:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-07-07 14:02:36,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2020-07-07 14:02:36,248 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 267 [2020-07-07 14:02:36,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:36,249 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2020-07-07 14:02:36,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-07 14:02:36,249 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2020-07-07 14:02:36,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-07-07 14:02:36,250 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:36,250 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:36,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-07-07 14:02:36,251 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:36,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:36,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1614229437, now seen corresponding path program 27 times [2020-07-07 14:02:36,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:36,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800153704] [2020-07-07 14:02:36,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:38,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:38,407 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:38,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800153704] [2020-07-07 14:02:38,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:38,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2020-07-07 14:02:38,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192180476] [2020-07-07 14:02:38,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-07 14:02:38,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:38,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-07 14:02:38,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=3513, Unknown=0, NotChecked=0, Total=3660 [2020-07-07 14:02:38,408 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand 61 states. [2020-07-07 14:02:42,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:42,092 INFO L93 Difference]: Finished difference Result 290 states and 291 transitions. [2020-07-07 14:02:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-07-07 14:02:42,093 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 269 [2020-07-07 14:02:42,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:42,094 INFO L225 Difference]: With dead ends: 290 [2020-07-07 14:02:42,094 INFO L226 Difference]: Without dead ends: 283 [2020-07-07 14:02:42,095 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3543 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=417, Invalid=12693, Unknown=0, NotChecked=0, Total=13110 [2020-07-07 14:02:42,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-07-07 14:02:42,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 280. [2020-07-07 14:02:42,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-07-07 14:02:42,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 281 transitions. [2020-07-07 14:02:42,156 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 281 transitions. Word has length 269 [2020-07-07 14:02:42,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:42,157 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 281 transitions. [2020-07-07 14:02:42,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-07 14:02:42,157 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 281 transitions. [2020-07-07 14:02:42,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-07-07 14:02:42,158 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:42,158 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:42,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-07-07 14:02:42,158 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:42,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:42,158 INFO L82 PathProgramCache]: Analyzing trace with hash -432347306, now seen corresponding path program 30 times [2020-07-07 14:02:42,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:42,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552368813] [2020-07-07 14:02:42,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:42,911 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:42,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552368813] [2020-07-07 14:02:42,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:42,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-07-07 14:02:42,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219973730] [2020-07-07 14:02:42,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-07 14:02:42,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:42,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-07 14:02:42,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 14:02:42,913 INFO L87 Difference]: Start difference. First operand 280 states and 281 transitions. Second operand 33 states. [2020-07-07 14:02:43,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:43,964 INFO L93 Difference]: Finished difference Result 304 states and 306 transitions. [2020-07-07 14:02:43,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-07-07 14:02:43,964 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 276 [2020-07-07 14:02:43,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:43,967 INFO L225 Difference]: With dead ends: 304 [2020-07-07 14:02:43,967 INFO L226 Difference]: Without dead ends: 296 [2020-07-07 14:02:43,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-07-07 14:02:43,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-07-07 14:02:44,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 286. [2020-07-07 14:02:44,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-07-07 14:02:44,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2020-07-07 14:02:44,036 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 276 [2020-07-07 14:02:44,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:44,036 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2020-07-07 14:02:44,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-07 14:02:44,037 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2020-07-07 14:02:44,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-07-07 14:02:44,038 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:44,038 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:44,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-07-07 14:02:44,038 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:44,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:44,038 INFO L82 PathProgramCache]: Analyzing trace with hash -252274727, now seen corresponding path program 28 times [2020-07-07 14:02:44,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:44,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226554262] [2020-07-07 14:02:44,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:46,376 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:46,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226554262] [2020-07-07 14:02:46,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:46,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2020-07-07 14:02:46,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124022536] [2020-07-07 14:02:46,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-07-07 14:02:46,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:46,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-07-07 14:02:46,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=3754, Unknown=0, NotChecked=0, Total=3906 [2020-07-07 14:02:46,377 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand 63 states. [2020-07-07 14:02:50,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:50,283 INFO L93 Difference]: Finished difference Result 299 states and 300 transitions. [2020-07-07 14:02:50,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-07-07 14:02:50,284 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 278 [2020-07-07 14:02:50,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:50,287 INFO L225 Difference]: With dead ends: 299 [2020-07-07 14:02:50,287 INFO L226 Difference]: Without dead ends: 292 [2020-07-07 14:02:50,288 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3814 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=432, Invalid=13610, Unknown=0, NotChecked=0, Total=14042 [2020-07-07 14:02:50,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-07-07 14:02:50,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2020-07-07 14:02:50,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-07-07 14:02:50,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2020-07-07 14:02:50,338 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 278 [2020-07-07 14:02:50,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:50,339 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2020-07-07 14:02:50,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-07-07 14:02:50,339 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2020-07-07 14:02:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-07-07 14:02:50,341 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:50,341 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:50,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-07-07 14:02:50,341 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:50,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:50,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1077906176, now seen corresponding path program 31 times [2020-07-07 14:02:50,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:50,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952146948] [2020-07-07 14:02:50,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:50,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:51,110 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:51,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952146948] [2020-07-07 14:02:51,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:51,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-07-07 14:02:51,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438184873] [2020-07-07 14:02:51,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-07 14:02:51,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:51,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-07 14:02:51,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-07-07 14:02:51,112 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand 34 states. [2020-07-07 14:02:52,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:52,262 INFO L93 Difference]: Finished difference Result 313 states and 315 transitions. [2020-07-07 14:02:52,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-07-07 14:02:52,262 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 285 [2020-07-07 14:02:52,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:52,264 INFO L225 Difference]: With dead ends: 313 [2020-07-07 14:02:52,264 INFO L226 Difference]: Without dead ends: 305 [2020-07-07 14:02:52,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-07-07 14:02:52,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-07-07 14:02:52,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 295. [2020-07-07 14:02:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-07-07 14:02:52,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2020-07-07 14:02:52,308 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 285 [2020-07-07 14:02:52,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:52,309 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2020-07-07 14:02:52,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-07 14:02:52,309 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2020-07-07 14:02:52,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-07-07 14:02:52,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:52,311 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:52,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-07-07 14:02:52,311 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:52,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:52,311 INFO L82 PathProgramCache]: Analyzing trace with hash -597624573, now seen corresponding path program 29 times [2020-07-07 14:02:52,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:52,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362859341] [2020-07-07 14:02:52,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:52,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:54,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:02:54,830 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:02:54,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362859341] [2020-07-07 14:02:54,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:02:54,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2020-07-07 14:02:54,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823539561] [2020-07-07 14:02:54,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-07-07 14:02:54,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:02:54,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-07-07 14:02:54,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=4003, Unknown=0, NotChecked=0, Total=4160 [2020-07-07 14:02:54,832 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 65 states. [2020-07-07 14:02:59,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:02:59,067 INFO L93 Difference]: Finished difference Result 308 states and 309 transitions. [2020-07-07 14:02:59,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-07-07 14:02:59,068 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 287 [2020-07-07 14:02:59,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:02:59,070 INFO L225 Difference]: With dead ends: 308 [2020-07-07 14:02:59,070 INFO L226 Difference]: Without dead ends: 301 [2020-07-07 14:02:59,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=447, Invalid=14559, Unknown=0, NotChecked=0, Total=15006 [2020-07-07 14:02:59,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-07-07 14:02:59,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 298. [2020-07-07 14:02:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-07-07 14:02:59,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2020-07-07 14:02:59,116 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 287 [2020-07-07 14:02:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:02:59,116 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2020-07-07 14:02:59,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-07-07 14:02:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2020-07-07 14:02:59,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-07-07 14:02:59,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:02:59,118 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:02:59,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-07-07 14:02:59,118 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:02:59,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:02:59,118 INFO L82 PathProgramCache]: Analyzing trace with hash -427333994, now seen corresponding path program 32 times [2020-07-07 14:02:59,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:02:59,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954841051] [2020-07-07 14:02:59,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:02:59,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:02:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:00,010 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:00,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954841051] [2020-07-07 14:03:00,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:00,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-07-07 14:03:00,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541168494] [2020-07-07 14:03:00,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-07 14:03:00,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:00,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-07 14:03:00,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 14:03:00,012 INFO L87 Difference]: Start difference. First operand 298 states and 299 transitions. Second operand 35 states. [2020-07-07 14:03:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:01,230 INFO L93 Difference]: Finished difference Result 322 states and 324 transitions. [2020-07-07 14:03:01,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-07-07 14:03:01,230 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 294 [2020-07-07 14:03:01,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:01,232 INFO L225 Difference]: With dead ends: 322 [2020-07-07 14:03:01,232 INFO L226 Difference]: Without dead ends: 314 [2020-07-07 14:03:01,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-07-07 14:03:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-07-07 14:03:01,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2020-07-07 14:03:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-07-07 14:03:01,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 305 transitions. [2020-07-07 14:03:01,302 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 305 transitions. Word has length 294 [2020-07-07 14:03:01,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:01,303 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 305 transitions. [2020-07-07 14:03:01,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-07 14:03:01,303 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 305 transitions. [2020-07-07 14:03:01,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-07-07 14:03:01,304 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:01,305 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:01,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-07-07 14:03:01,305 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash 270550809, now seen corresponding path program 30 times [2020-07-07 14:03:01,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:01,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766092460] [2020-07-07 14:03:01,306 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:03,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:04,001 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:04,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766092460] [2020-07-07 14:03:04,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:04,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2020-07-07 14:03:04,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855609801] [2020-07-07 14:03:04,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-07-07 14:03:04,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:04,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-07-07 14:03:04,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=4260, Unknown=0, NotChecked=0, Total=4422 [2020-07-07 14:03:04,003 INFO L87 Difference]: Start difference. First operand 304 states and 305 transitions. Second operand 67 states. [2020-07-07 14:03:08,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:08,674 INFO L93 Difference]: Finished difference Result 317 states and 318 transitions. [2020-07-07 14:03:08,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-07-07 14:03:08,675 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 296 [2020-07-07 14:03:08,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:08,677 INFO L225 Difference]: With dead ends: 317 [2020-07-07 14:03:08,677 INFO L226 Difference]: Without dead ends: 310 [2020-07-07 14:03:08,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4386 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=462, Invalid=15540, Unknown=0, NotChecked=0, Total=16002 [2020-07-07 14:03:08,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-07-07 14:03:08,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 307. [2020-07-07 14:03:08,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-07-07 14:03:08,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2020-07-07 14:03:08,730 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 296 [2020-07-07 14:03:08,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:08,730 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2020-07-07 14:03:08,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-07-07 14:03:08,730 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2020-07-07 14:03:08,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-07-07 14:03:08,732 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:08,732 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:08,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-07-07 14:03:08,733 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:08,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:08,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1458451392, now seen corresponding path program 33 times [2020-07-07 14:03:08,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:08,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201838094] [2020-07-07 14:03:08,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:09,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:09,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:09,726 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:09,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201838094] [2020-07-07 14:03:09,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:09,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-07-07 14:03:09,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664168876] [2020-07-07 14:03:09,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-07 14:03:09,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:09,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-07 14:03:09,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-07-07 14:03:09,728 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 36 states. [2020-07-07 14:03:11,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:11,095 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2020-07-07 14:03:11,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-07-07 14:03:11,096 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 303 [2020-07-07 14:03:11,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:11,098 INFO L225 Difference]: With dead ends: 331 [2020-07-07 14:03:11,098 INFO L226 Difference]: Without dead ends: 323 [2020-07-07 14:03:11,099 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-07-07 14:03:11,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-07-07 14:03:11,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 313. [2020-07-07 14:03:11,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-07-07 14:03:11,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2020-07-07 14:03:11,148 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 303 [2020-07-07 14:03:11,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:11,149 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2020-07-07 14:03:11,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-07 14:03:11,149 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2020-07-07 14:03:11,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-07-07 14:03:11,151 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:11,151 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:11,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-07-07 14:03:11,151 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:11,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:11,152 INFO L82 PathProgramCache]: Analyzing trace with hash 34107843, now seen corresponding path program 31 times [2020-07-07 14:03:11,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:11,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906865426] [2020-07-07 14:03:11,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:11,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:13,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:14,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:14,045 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:14,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906865426] [2020-07-07 14:03:14,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:14,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2020-07-07 14:03:14,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447702539] [2020-07-07 14:03:14,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-07 14:03:14,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:14,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-07 14:03:14,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=4525, Unknown=0, NotChecked=0, Total=4692 [2020-07-07 14:03:14,047 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand 69 states. [2020-07-07 14:03:18,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:18,893 INFO L93 Difference]: Finished difference Result 326 states and 327 transitions. [2020-07-07 14:03:18,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-07-07 14:03:18,894 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 305 [2020-07-07 14:03:18,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:18,896 INFO L225 Difference]: With dead ends: 326 [2020-07-07 14:03:18,896 INFO L226 Difference]: Without dead ends: 319 [2020-07-07 14:03:18,897 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4687 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=477, Invalid=16553, Unknown=0, NotChecked=0, Total=17030 [2020-07-07 14:03:18,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-07-07 14:03:18,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 316. [2020-07-07 14:03:18,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-07-07 14:03:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 317 transitions. [2020-07-07 14:03:18,947 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 317 transitions. Word has length 305 [2020-07-07 14:03:18,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:18,947 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 317 transitions. [2020-07-07 14:03:18,948 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-07 14:03:18,948 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 317 transitions. [2020-07-07 14:03:18,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-07-07 14:03:18,949 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:18,949 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:18,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-07-07 14:03:18,950 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:18,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:18,950 INFO L82 PathProgramCache]: Analyzing trace with hash -588605994, now seen corresponding path program 34 times [2020-07-07 14:03:18,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:18,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93840879] [2020-07-07 14:03:18,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:18,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:19,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:19,946 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:19,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93840879] [2020-07-07 14:03:19,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:19,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-07-07 14:03:19,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591721156] [2020-07-07 14:03:19,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-07 14:03:19,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:19,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-07 14:03:19,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-07-07 14:03:19,948 INFO L87 Difference]: Start difference. First operand 316 states and 317 transitions. Second operand 37 states. [2020-07-07 14:03:21,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:21,439 INFO L93 Difference]: Finished difference Result 340 states and 342 transitions. [2020-07-07 14:03:21,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-07-07 14:03:21,439 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 312 [2020-07-07 14:03:21,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:21,442 INFO L225 Difference]: With dead ends: 340 [2020-07-07 14:03:21,442 INFO L226 Difference]: Without dead ends: 332 [2020-07-07 14:03:21,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-07-07 14:03:21,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-07-07 14:03:21,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 322. [2020-07-07 14:03:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-07-07 14:03:21,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 323 transitions. [2020-07-07 14:03:21,493 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 323 transitions. Word has length 312 [2020-07-07 14:03:21,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:21,493 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 323 transitions. [2020-07-07 14:03:21,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-07 14:03:21,494 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 323 transitions. [2020-07-07 14:03:21,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-07-07 14:03:21,495 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:21,495 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:21,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-07-07 14:03:21,496 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:21,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:21,496 INFO L82 PathProgramCache]: Analyzing trace with hash -93018535, now seen corresponding path program 32 times [2020-07-07 14:03:21,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:21,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076362631] [2020-07-07 14:03:21,496 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:21,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:24,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:24,702 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:24,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076362631] [2020-07-07 14:03:24,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:24,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2020-07-07 14:03:24,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457104827] [2020-07-07 14:03:24,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-07-07 14:03:24,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:24,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-07-07 14:03:24,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=4798, Unknown=0, NotChecked=0, Total=4970 [2020-07-07 14:03:24,703 INFO L87 Difference]: Start difference. First operand 322 states and 323 transitions. Second operand 71 states. [2020-07-07 14:03:29,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:29,862 INFO L93 Difference]: Finished difference Result 335 states and 336 transitions. [2020-07-07 14:03:29,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-07-07 14:03:29,864 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 314 [2020-07-07 14:03:29,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:29,865 INFO L225 Difference]: With dead ends: 335 [2020-07-07 14:03:29,865 INFO L226 Difference]: Without dead ends: 328 [2020-07-07 14:03:29,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4998 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=492, Invalid=17598, Unknown=0, NotChecked=0, Total=18090 [2020-07-07 14:03:29,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-07-07 14:03:29,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 325. [2020-07-07 14:03:29,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-07-07 14:03:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2020-07-07 14:03:29,927 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 314 [2020-07-07 14:03:29,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:29,927 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2020-07-07 14:03:29,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-07-07 14:03:29,927 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2020-07-07 14:03:29,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-07-07 14:03:29,929 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:29,929 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:29,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-07-07 14:03:29,929 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:29,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:29,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1846291584, now seen corresponding path program 35 times [2020-07-07 14:03:29,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:29,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874668619] [2020-07-07 14:03:29,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:31,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:31,170 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:31,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874668619] [2020-07-07 14:03:31,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:31,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-07-07 14:03:31,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333668759] [2020-07-07 14:03:31,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-07 14:03:31,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:31,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-07 14:03:31,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-07-07 14:03:31,172 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand 38 states. [2020-07-07 14:03:32,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:32,747 INFO L93 Difference]: Finished difference Result 349 states and 351 transitions. [2020-07-07 14:03:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-07-07 14:03:32,748 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 321 [2020-07-07 14:03:32,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:32,750 INFO L225 Difference]: With dead ends: 349 [2020-07-07 14:03:32,750 INFO L226 Difference]: Without dead ends: 341 [2020-07-07 14:03:32,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-07-07 14:03:32,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-07-07 14:03:32,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 331. [2020-07-07 14:03:32,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-07-07 14:03:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2020-07-07 14:03:32,804 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 321 [2020-07-07 14:03:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:32,805 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2020-07-07 14:03:32,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-07 14:03:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2020-07-07 14:03:32,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-07-07 14:03:32,806 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:32,806 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:32,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-07-07 14:03:32,806 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:32,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:32,807 INFO L82 PathProgramCache]: Analyzing trace with hash -913622397, now seen corresponding path program 33 times [2020-07-07 14:03:32,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:32,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129110497] [2020-07-07 14:03:32,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:36,479 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:36,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129110497] [2020-07-07 14:03:36,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:36,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2020-07-07 14:03:36,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649918993] [2020-07-07 14:03:36,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-07-07 14:03:36,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:36,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-07-07 14:03:36,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=5079, Unknown=0, NotChecked=0, Total=5256 [2020-07-07 14:03:36,481 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 73 states. [2020-07-07 14:03:42,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:42,120 INFO L93 Difference]: Finished difference Result 344 states and 345 transitions. [2020-07-07 14:03:42,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-07-07 14:03:42,122 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 323 [2020-07-07 14:03:42,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:42,124 INFO L225 Difference]: With dead ends: 344 [2020-07-07 14:03:42,125 INFO L226 Difference]: Without dead ends: 337 [2020-07-07 14:03:42,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5319 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=507, Invalid=18675, Unknown=0, NotChecked=0, Total=19182 [2020-07-07 14:03:42,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-07-07 14:03:42,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 334. [2020-07-07 14:03:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-07-07 14:03:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 335 transitions. [2020-07-07 14:03:42,184 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 335 transitions. Word has length 323 [2020-07-07 14:03:42,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:42,184 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 335 transitions. [2020-07-07 14:03:42,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-07-07 14:03:42,184 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 335 transitions. [2020-07-07 14:03:42,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-07 14:03:42,186 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:42,186 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:42,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-07-07 14:03:42,186 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:42,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:42,187 INFO L82 PathProgramCache]: Analyzing trace with hash -753371882, now seen corresponding path program 36 times [2020-07-07 14:03:42,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:42,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143496436] [2020-07-07 14:03:42,187 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:43,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:43,393 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:43,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143496436] [2020-07-07 14:03:43,394 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:43,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-07-07 14:03:43,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000087796] [2020-07-07 14:03:43,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-07 14:03:43,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:43,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-07 14:03:43,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-07-07 14:03:43,395 INFO L87 Difference]: Start difference. First operand 334 states and 335 transitions. Second operand 39 states. [2020-07-07 14:03:45,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:45,067 INFO L93 Difference]: Finished difference Result 358 states and 360 transitions. [2020-07-07 14:03:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-07-07 14:03:45,068 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 330 [2020-07-07 14:03:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:45,070 INFO L225 Difference]: With dead ends: 358 [2020-07-07 14:03:45,070 INFO L226 Difference]: Without dead ends: 350 [2020-07-07 14:03:45,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-07-07 14:03:45,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-07-07 14:03:45,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2020-07-07 14:03:45,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-07-07 14:03:45,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 341 transitions. [2020-07-07 14:03:45,128 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 341 transitions. Word has length 330 [2020-07-07 14:03:45,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:45,128 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 341 transitions. [2020-07-07 14:03:45,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-07 14:03:45,128 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 341 transitions. [2020-07-07 14:03:45,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-07 14:03:45,129 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:45,130 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:45,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-07-07 14:03:45,130 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:45,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:45,130 INFO L82 PathProgramCache]: Analyzing trace with hash 480753049, now seen corresponding path program 34 times [2020-07-07 14:03:45,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:45,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916132298] [2020-07-07 14:03:45,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:45,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:49,091 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:49,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916132298] [2020-07-07 14:03:49,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:49,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2020-07-07 14:03:49,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378639274] [2020-07-07 14:03:49,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-07 14:03:49,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:49,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-07 14:03:49,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=5368, Unknown=0, NotChecked=0, Total=5550 [2020-07-07 14:03:49,094 INFO L87 Difference]: Start difference. First operand 340 states and 341 transitions. Second operand 75 states. [2020-07-07 14:03:55,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:55,413 INFO L93 Difference]: Finished difference Result 353 states and 354 transitions. [2020-07-07 14:03:55,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-07-07 14:03:55,415 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 332 [2020-07-07 14:03:55,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:55,417 INFO L225 Difference]: With dead ends: 353 [2020-07-07 14:03:55,417 INFO L226 Difference]: Without dead ends: 346 [2020-07-07 14:03:55,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5650 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=522, Invalid=19784, Unknown=0, NotChecked=0, Total=20306 [2020-07-07 14:03:55,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-07-07 14:03:55,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 343. [2020-07-07 14:03:55,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-07-07 14:03:55,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2020-07-07 14:03:55,478 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 332 [2020-07-07 14:03:55,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:55,478 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2020-07-07 14:03:55,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-07 14:03:55,479 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2020-07-07 14:03:55,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-07 14:03:55,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:55,480 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:55,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-07-07 14:03:55,480 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:55,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:55,480 INFO L82 PathProgramCache]: Analyzing trace with hash 644183360, now seen corresponding path program 37 times [2020-07-07 14:03:55,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:55,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831692553] [2020-07-07 14:03:55,481 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:03:56,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:03:56,830 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:03:56,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831692553] [2020-07-07 14:03:56,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:03:56,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-07-07 14:03:56,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881392849] [2020-07-07 14:03:56,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-07 14:03:56,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:03:56,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-07 14:03:56,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-07-07 14:03:56,832 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 40 states. [2020-07-07 14:03:58,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:03:58,729 INFO L93 Difference]: Finished difference Result 367 states and 369 transitions. [2020-07-07 14:03:58,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-07-07 14:03:58,730 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 339 [2020-07-07 14:03:58,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:03:58,732 INFO L225 Difference]: With dead ends: 367 [2020-07-07 14:03:58,732 INFO L226 Difference]: Without dead ends: 359 [2020-07-07 14:03:58,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-07-07 14:03:58,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-07-07 14:03:58,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 349. [2020-07-07 14:03:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-07-07 14:03:58,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 350 transitions. [2020-07-07 14:03:58,793 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 350 transitions. Word has length 339 [2020-07-07 14:03:58,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:03:58,794 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 350 transitions. [2020-07-07 14:03:58,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-07 14:03:58,794 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 350 transitions. [2020-07-07 14:03:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-07 14:03:58,795 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:03:58,796 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:03:58,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-07-07 14:03:58,796 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:03:58,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:03:58,796 INFO L82 PathProgramCache]: Analyzing trace with hash -793423037, now seen corresponding path program 35 times [2020-07-07 14:03:58,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:03:58,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027623274] [2020-07-07 14:03:58,797 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:03:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:02,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:03,145 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:03,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027623274] [2020-07-07 14:04:03,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:03,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2020-07-07 14:04:03,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950711789] [2020-07-07 14:04:03,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-07-07 14:04:03,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:03,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-07-07 14:04:03,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=5665, Unknown=0, NotChecked=0, Total=5852 [2020-07-07 14:04:03,147 INFO L87 Difference]: Start difference. First operand 349 states and 350 transitions. Second operand 77 states. [2020-07-07 14:04:10,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:10,115 INFO L93 Difference]: Finished difference Result 362 states and 363 transitions. [2020-07-07 14:04:10,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-07-07 14:04:10,117 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 341 [2020-07-07 14:04:10,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:10,119 INFO L225 Difference]: With dead ends: 362 [2020-07-07 14:04:10,119 INFO L226 Difference]: Without dead ends: 355 [2020-07-07 14:04:10,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5991 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=537, Invalid=20925, Unknown=0, NotChecked=0, Total=21462 [2020-07-07 14:04:10,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-07-07 14:04:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 352. [2020-07-07 14:04:10,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-07-07 14:04:10,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2020-07-07 14:04:10,182 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 341 [2020-07-07 14:04:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:10,183 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2020-07-07 14:04:10,183 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-07-07 14:04:10,183 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2020-07-07 14:04:10,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-07 14:04:10,184 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:10,184 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:10,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-07-07 14:04:10,184 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:10,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:10,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1304757334, now seen corresponding path program 38 times [2020-07-07 14:04:10,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:10,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689011379] [2020-07-07 14:04:10,185 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:10,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:11,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:11,808 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:11,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689011379] [2020-07-07 14:04:11,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:11,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-07-07 14:04:11,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657624721] [2020-07-07 14:04:11,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-07 14:04:11,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:11,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-07 14:04:11,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-07-07 14:04:11,815 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand 41 states. [2020-07-07 14:04:13,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:13,981 INFO L93 Difference]: Finished difference Result 376 states and 378 transitions. [2020-07-07 14:04:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-07-07 14:04:13,983 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 348 [2020-07-07 14:04:13,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:13,986 INFO L225 Difference]: With dead ends: 376 [2020-07-07 14:04:13,986 INFO L226 Difference]: Without dead ends: 368 [2020-07-07 14:04:13,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-07-07 14:04:13,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-07-07 14:04:14,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 358. [2020-07-07 14:04:14,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-07-07 14:04:14,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 359 transitions. [2020-07-07 14:04:14,050 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 359 transitions. Word has length 348 [2020-07-07 14:04:14,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:14,050 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 359 transitions. [2020-07-07 14:04:14,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-07 14:04:14,050 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 359 transitions. [2020-07-07 14:04:14,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-07-07 14:04:14,051 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:14,052 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:14,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-07-07 14:04:14,052 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:14,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1636993831, now seen corresponding path program 36 times [2020-07-07 14:04:14,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:14,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120503831] [2020-07-07 14:04:14,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:19,014 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:19,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120503831] [2020-07-07 14:04:19,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:19,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2020-07-07 14:04:19,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588288250] [2020-07-07 14:04:19,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-07-07 14:04:19,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:19,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-07-07 14:04:19,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5970, Unknown=0, NotChecked=0, Total=6162 [2020-07-07 14:04:19,016 INFO L87 Difference]: Start difference. First operand 358 states and 359 transitions. Second operand 79 states. [2020-07-07 14:04:30,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:30,658 INFO L93 Difference]: Finished difference Result 371 states and 372 transitions. [2020-07-07 14:04:30,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-07-07 14:04:30,659 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 350 [2020-07-07 14:04:30,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:30,662 INFO L225 Difference]: With dead ends: 371 [2020-07-07 14:04:30,662 INFO L226 Difference]: Without dead ends: 364 [2020-07-07 14:04:30,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6342 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=552, Invalid=22098, Unknown=0, NotChecked=0, Total=22650 [2020-07-07 14:04:30,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-07-07 14:04:30,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 361. [2020-07-07 14:04:30,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-07-07 14:04:30,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 362 transitions. [2020-07-07 14:04:30,730 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 362 transitions. Word has length 350 [2020-07-07 14:04:30,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:30,731 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 362 transitions. [2020-07-07 14:04:30,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-07-07 14:04:30,731 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 362 transitions. [2020-07-07 14:04:30,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-07-07 14:04:30,733 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:30,733 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:30,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-07-07 14:04:30,733 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:30,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:30,734 INFO L82 PathProgramCache]: Analyzing trace with hash 96865792, now seen corresponding path program 39 times [2020-07-07 14:04:30,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:30,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150372405] [2020-07-07 14:04:30,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:30,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:32,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:32,519 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:32,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150372405] [2020-07-07 14:04:32,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:32,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-07-07 14:04:32,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713433996] [2020-07-07 14:04:32,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-07 14:04:32,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:32,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-07 14:04:32,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-07-07 14:04:32,521 INFO L87 Difference]: Start difference. First operand 361 states and 362 transitions. Second operand 42 states. [2020-07-07 14:04:34,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:34,949 INFO L93 Difference]: Finished difference Result 385 states and 387 transitions. [2020-07-07 14:04:34,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-07-07 14:04:34,950 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 357 [2020-07-07 14:04:34,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:34,953 INFO L225 Difference]: With dead ends: 385 [2020-07-07 14:04:34,953 INFO L226 Difference]: Without dead ends: 377 [2020-07-07 14:04:34,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-07-07 14:04:34,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-07-07 14:04:35,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 367. [2020-07-07 14:04:35,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-07-07 14:04:35,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 368 transitions. [2020-07-07 14:04:35,020 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 368 transitions. Word has length 357 [2020-07-07 14:04:35,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:35,020 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 368 transitions. [2020-07-07 14:04:35,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-07 14:04:35,020 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 368 transitions. [2020-07-07 14:04:35,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-07-07 14:04:35,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:35,022 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:35,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-07-07 14:04:35,022 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:35,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:35,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1515371523, now seen corresponding path program 37 times [2020-07-07 14:04:35,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:35,023 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757579497] [2020-07-07 14:04:35,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:35,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:40,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:40,885 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:40,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757579497] [2020-07-07 14:04:40,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:40,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2020-07-07 14:04:40,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274875623] [2020-07-07 14:04:40,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-07-07 14:04:40,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:40,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-07-07 14:04:40,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=6283, Unknown=0, NotChecked=0, Total=6480 [2020-07-07 14:04:40,887 INFO L87 Difference]: Start difference. First operand 367 states and 368 transitions. Second operand 81 states. [2020-07-07 14:04:50,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:50,608 INFO L93 Difference]: Finished difference Result 380 states and 381 transitions. [2020-07-07 14:04:50,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-07-07 14:04:50,610 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 359 [2020-07-07 14:04:50,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:50,612 INFO L225 Difference]: With dead ends: 380 [2020-07-07 14:04:50,613 INFO L226 Difference]: Without dead ends: 373 [2020-07-07 14:04:50,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6703 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=567, Invalid=23303, Unknown=0, NotChecked=0, Total=23870 [2020-07-07 14:04:50,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-07-07 14:04:50,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 370. [2020-07-07 14:04:50,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-07-07 14:04:50,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 371 transitions. [2020-07-07 14:04:50,707 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 371 transitions. Word has length 359 [2020-07-07 14:04:50,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:50,707 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 371 transitions. [2020-07-07 14:04:50,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-07-07 14:04:50,707 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 371 transitions. [2020-07-07 14:04:50,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-07-07 14:04:50,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:50,710 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:50,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-07-07 14:04:50,710 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:50,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:50,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1935391850, now seen corresponding path program 40 times [2020-07-07 14:04:50,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:50,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222865198] [2020-07-07 14:04:50,711 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:50,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:52,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:04:52,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:04:52,926 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:04:52,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222865198] [2020-07-07 14:04:52,927 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:04:52,927 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-07-07 14:04:52,927 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845551639] [2020-07-07 14:04:52,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-07 14:04:52,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:04:52,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-07 14:04:52,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-07-07 14:04:52,928 INFO L87 Difference]: Start difference. First operand 370 states and 371 transitions. Second operand 43 states. [2020-07-07 14:04:55,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:04:55,968 INFO L93 Difference]: Finished difference Result 394 states and 396 transitions. [2020-07-07 14:04:55,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-07-07 14:04:55,970 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 366 [2020-07-07 14:04:55,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:04:55,972 INFO L225 Difference]: With dead ends: 394 [2020-07-07 14:04:55,973 INFO L226 Difference]: Without dead ends: 386 [2020-07-07 14:04:55,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-07-07 14:04:55,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-07-07 14:04:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2020-07-07 14:04:56,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-07-07 14:04:56,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 377 transitions. [2020-07-07 14:04:56,057 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 377 transitions. Word has length 366 [2020-07-07 14:04:56,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:04:56,057 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 377 transitions. [2020-07-07 14:04:56,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-07 14:04:56,057 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 377 transitions. [2020-07-07 14:04:56,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-07-07 14:04:56,059 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:04:56,060 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:04:56,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-07-07 14:04:56,060 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:04:56,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:04:56,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1569070055, now seen corresponding path program 38 times [2020-07-07 14:04:56,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:04:56,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219724618] [2020-07-07 14:04:56,061 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:04:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:05:02,922 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:05:02,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219724618] [2020-07-07 14:05:02,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:05:02,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2020-07-07 14:05:02,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390743901] [2020-07-07 14:05:02,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-07-07 14:05:02,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:05:02,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-07-07 14:05:02,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=6604, Unknown=0, NotChecked=0, Total=6806 [2020-07-07 14:05:02,924 INFO L87 Difference]: Start difference. First operand 376 states and 377 transitions. Second operand 83 states. [2020-07-07 14:05:15,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:05:15,101 INFO L93 Difference]: Finished difference Result 389 states and 390 transitions. [2020-07-07 14:05:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-07-07 14:05:15,103 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 368 [2020-07-07 14:05:15,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:05:15,106 INFO L225 Difference]: With dead ends: 389 [2020-07-07 14:05:15,106 INFO L226 Difference]: Without dead ends: 382 [2020-07-07 14:05:15,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7074 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=582, Invalid=24540, Unknown=0, NotChecked=0, Total=25122 [2020-07-07 14:05:15,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-07-07 14:05:15,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 379. [2020-07-07 14:05:15,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-07-07 14:05:15,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 380 transitions. [2020-07-07 14:05:15,184 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 380 transitions. Word has length 368 [2020-07-07 14:05:15,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:05:15,185 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 380 transitions. [2020-07-07 14:05:15,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-07-07 14:05:15,185 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 380 transitions. [2020-07-07 14:05:15,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-07-07 14:05:15,187 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:05:15,188 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:05:15,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-07-07 14:05:15,188 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:05:15,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:05:15,188 INFO L82 PathProgramCache]: Analyzing trace with hash 922351296, now seen corresponding path program 41 times [2020-07-07 14:05:15,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:05:15,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667027112] [2020-07-07 14:05:15,189 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:05:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:17,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:05:17,706 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:05:17,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667027112] [2020-07-07 14:05:17,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:05:17,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-07-07 14:05:17,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699569713] [2020-07-07 14:05:17,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-07 14:05:17,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:05:17,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-07 14:05:17,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-07-07 14:05:17,708 INFO L87 Difference]: Start difference. First operand 379 states and 380 transitions. Second operand 44 states. [2020-07-07 14:05:21,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:05:21,250 INFO L93 Difference]: Finished difference Result 403 states and 405 transitions. [2020-07-07 14:05:21,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-07-07 14:05:21,253 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 375 [2020-07-07 14:05:21,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:05:21,255 INFO L225 Difference]: With dead ends: 403 [2020-07-07 14:05:21,256 INFO L226 Difference]: Without dead ends: 395 [2020-07-07 14:05:21,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-07-07 14:05:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-07-07 14:05:21,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 385. [2020-07-07 14:05:21,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-07-07 14:05:21,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 386 transitions. [2020-07-07 14:05:21,347 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 386 transitions. Word has length 375 [2020-07-07 14:05:21,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:05:21,347 INFO L479 AbstractCegarLoop]: Abstraction has 385 states and 386 transitions. [2020-07-07 14:05:21,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-07 14:05:21,347 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 386 transitions. [2020-07-07 14:05:21,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-07-07 14:05:21,350 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:05:21,350 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:05:21,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-07-07 14:05:21,350 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:05:21,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:05:21,351 INFO L82 PathProgramCache]: Analyzing trace with hash 237991107, now seen corresponding path program 39 times [2020-07-07 14:05:21,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:05:21,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671466188] [2020-07-07 14:05:21,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:05:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:29,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:05:29,290 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:05:29,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671466188] [2020-07-07 14:05:29,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:05:29,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2020-07-07 14:05:29,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093204468] [2020-07-07 14:05:29,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-07-07 14:05:29,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:05:29,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-07-07 14:05:29,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=6933, Unknown=0, NotChecked=0, Total=7140 [2020-07-07 14:05:29,292 INFO L87 Difference]: Start difference. First operand 385 states and 386 transitions. Second operand 85 states. [2020-07-07 14:05:50,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:05:50,188 INFO L93 Difference]: Finished difference Result 398 states and 399 transitions. [2020-07-07 14:05:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-07-07 14:05:50,191 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 377 [2020-07-07 14:05:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:05:50,194 INFO L225 Difference]: With dead ends: 398 [2020-07-07 14:05:50,194 INFO L226 Difference]: Without dead ends: 391 [2020-07-07 14:05:50,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7455 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=597, Invalid=25809, Unknown=0, NotChecked=0, Total=26406 [2020-07-07 14:05:50,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-07-07 14:05:50,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 388. [2020-07-07 14:05:50,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-07-07 14:05:50,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 389 transitions. [2020-07-07 14:05:50,286 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 389 transitions. Word has length 377 [2020-07-07 14:05:50,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:05:50,287 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 389 transitions. [2020-07-07 14:05:50,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-07-07 14:05:50,287 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 389 transitions. [2020-07-07 14:05:50,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2020-07-07 14:05:50,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:05:50,289 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:05:50,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-07-07 14:05:50,289 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:05:50,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:05:50,290 INFO L82 PathProgramCache]: Analyzing trace with hash -899009834, now seen corresponding path program 42 times [2020-07-07 14:05:50,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:05:50,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879616654] [2020-07-07 14:05:50,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:05:50,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:05:53,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:05:53,283 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:05:53,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879616654] [2020-07-07 14:05:53,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:05:53,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-07-07 14:05:53,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372345325] [2020-07-07 14:05:53,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-07 14:05:53,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:05:53,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-07 14:05:53,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-07-07 14:05:53,285 INFO L87 Difference]: Start difference. First operand 388 states and 389 transitions. Second operand 45 states. [2020-07-07 14:05:57,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:05:57,418 INFO L93 Difference]: Finished difference Result 412 states and 414 transitions. [2020-07-07 14:05:57,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-07-07 14:05:57,421 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 384 [2020-07-07 14:05:57,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:05:57,424 INFO L225 Difference]: With dead ends: 412 [2020-07-07 14:05:57,424 INFO L226 Difference]: Without dead ends: 404 [2020-07-07 14:05:57,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-07-07 14:05:57,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-07-07 14:05:57,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 394. [2020-07-07 14:05:57,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-07-07 14:05:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 395 transitions. [2020-07-07 14:05:57,515 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 395 transitions. Word has length 384 [2020-07-07 14:05:57,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:05:57,516 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 395 transitions. [2020-07-07 14:05:57,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-07 14:05:57,516 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 395 transitions. [2020-07-07 14:05:57,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-07-07 14:05:57,527 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:05:57,527 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:05:57,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-07-07 14:05:57,528 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:05:57,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:05:57,528 INFO L82 PathProgramCache]: Analyzing trace with hash -2038365351, now seen corresponding path program 40 times [2020-07-07 14:05:57,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:05:57,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187017297] [2020-07-07 14:05:57,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:05:57,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:06:06,729 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:06,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187017297] [2020-07-07 14:06:06,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:06:06,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2020-07-07 14:06:06,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28782937] [2020-07-07 14:06:06,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-07-07 14:06:06,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:06:06,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-07-07 14:06:06,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=7270, Unknown=0, NotChecked=0, Total=7482 [2020-07-07 14:06:06,731 INFO L87 Difference]: Start difference. First operand 394 states and 395 transitions. Second operand 87 states. [2020-07-07 14:06:32,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:06:32,535 INFO L93 Difference]: Finished difference Result 407 states and 408 transitions. [2020-07-07 14:06:32,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-07-07 14:06:32,539 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 386 [2020-07-07 14:06:32,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:06:32,542 INFO L225 Difference]: With dead ends: 407 [2020-07-07 14:06:32,542 INFO L226 Difference]: Without dead ends: 400 [2020-07-07 14:06:32,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7846 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=612, Invalid=27110, Unknown=0, NotChecked=0, Total=27722 [2020-07-07 14:06:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-07-07 14:06:32,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 397. [2020-07-07 14:06:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-07-07 14:06:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 398 transitions. [2020-07-07 14:06:32,640 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 398 transitions. Word has length 386 [2020-07-07 14:06:32,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:06:32,640 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 398 transitions. [2020-07-07 14:06:32,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-07-07 14:06:32,641 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 398 transitions. [2020-07-07 14:06:32,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-07-07 14:06:32,644 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:32,644 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:06:32,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-07-07 14:06:32,645 INFO L427 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:32,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:32,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1238183808, now seen corresponding path program 43 times [2020-07-07 14:06:32,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:32,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667064457] [2020-07-07 14:06:32,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:06:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:36,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:36,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:06:36,290 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:36,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667064457] [2020-07-07 14:06:36,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:06:36,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-07-07 14:06:36,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424381278] [2020-07-07 14:06:36,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-07 14:06:36,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:06:36,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-07 14:06:36,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-07-07 14:06:36,292 INFO L87 Difference]: Start difference. First operand 397 states and 398 transitions. Second operand 46 states. [2020-07-07 14:06:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:06:41,143 INFO L93 Difference]: Finished difference Result 421 states and 423 transitions. [2020-07-07 14:06:41,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-07-07 14:06:41,146 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 393 [2020-07-07 14:06:41,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:06:41,150 INFO L225 Difference]: With dead ends: 421 [2020-07-07 14:06:41,150 INFO L226 Difference]: Without dead ends: 413 [2020-07-07 14:06:41,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-07-07 14:06:41,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-07-07 14:06:41,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 403. [2020-07-07 14:06:41,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-07-07 14:06:41,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2020-07-07 14:06:41,237 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 393 [2020-07-07 14:06:41,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:06:41,238 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2020-07-07 14:06:41,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-07 14:06:41,238 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2020-07-07 14:06:41,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-07-07 14:06:41,240 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:06:41,240 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:06:41,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-07-07 14:06:41,240 INFO L427 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:06:41,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:06:41,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1189642877, now seen corresponding path program 41 times [2020-07-07 14:06:41,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:06:41,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336376834] [2020-07-07 14:06:41,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:06:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:06:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:06:52,600 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:06:52,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336376834] [2020-07-07 14:06:52,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:06:52,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2020-07-07 14:06:52,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967519941] [2020-07-07 14:06:52,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-07-07 14:06:52,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:06:52,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-07-07 14:06:52,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=7615, Unknown=0, NotChecked=0, Total=7832 [2020-07-07 14:06:52,603 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 89 states. [2020-07-07 14:07:13,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:07:13,549 INFO L93 Difference]: Finished difference Result 416 states and 417 transitions. [2020-07-07 14:07:13,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-07-07 14:07:13,554 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 395 [2020-07-07 14:07:13,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:07:13,557 INFO L225 Difference]: With dead ends: 416 [2020-07-07 14:07:13,557 INFO L226 Difference]: Without dead ends: 409 [2020-07-07 14:07:13,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8247 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=627, Invalid=28443, Unknown=0, NotChecked=0, Total=29070 [2020-07-07 14:07:13,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-07-07 14:07:13,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 406. [2020-07-07 14:07:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-07-07 14:07:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 407 transitions. [2020-07-07 14:07:13,645 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 407 transitions. Word has length 395 [2020-07-07 14:07:13,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:07:13,645 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 407 transitions. [2020-07-07 14:07:13,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-07-07 14:07:13,646 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 407 transitions. [2020-07-07 14:07:13,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-07-07 14:07:13,647 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:07:13,647 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:07:13,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-07-07 14:07:13,648 INFO L427 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:07:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:07:13,648 INFO L82 PathProgramCache]: Analyzing trace with hash 2093666838, now seen corresponding path program 44 times [2020-07-07 14:07:13,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:07:13,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516025207] [2020-07-07 14:07:13,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:07:13,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:17,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:07:17,901 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:07:17,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516025207] [2020-07-07 14:07:17,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:07:17,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-07-07 14:07:17,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942650348] [2020-07-07 14:07:17,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-07 14:07:17,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:07:17,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-07 14:07:17,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-07-07 14:07:17,903 INFO L87 Difference]: Start difference. First operand 406 states and 407 transitions. Second operand 47 states. [2020-07-07 14:07:23,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:07:23,238 INFO L93 Difference]: Finished difference Result 430 states and 432 transitions. [2020-07-07 14:07:23,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-07-07 14:07:23,243 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 402 [2020-07-07 14:07:23,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:07:23,246 INFO L225 Difference]: With dead ends: 430 [2020-07-07 14:07:23,246 INFO L226 Difference]: Without dead ends: 422 [2020-07-07 14:07:23,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-07-07 14:07:23,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-07-07 14:07:23,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2020-07-07 14:07:23,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-07-07 14:07:23,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 413 transitions. [2020-07-07 14:07:23,338 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 413 transitions. Word has length 402 [2020-07-07 14:07:23,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:07:23,338 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 413 transitions. [2020-07-07 14:07:23,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-07 14:07:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 413 transitions. [2020-07-07 14:07:23,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2020-07-07 14:07:23,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:07:23,340 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:07:23,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-07-07 14:07:23,341 INFO L427 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:07:23,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:07:23,341 INFO L82 PathProgramCache]: Analyzing trace with hash 590795417, now seen corresponding path program 42 times [2020-07-07 14:07:23,341 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:07:23,341 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [695885326] [2020-07-07 14:07:23,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:07:23,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:07:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:07:36,597 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:07:36,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [695885326] [2020-07-07 14:07:36,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:07:36,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2020-07-07 14:07:36,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978652193] [2020-07-07 14:07:36,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-07-07 14:07:36,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:07:36,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-07-07 14:07:36,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=7968, Unknown=0, NotChecked=0, Total=8190 [2020-07-07 14:07:36,599 INFO L87 Difference]: Start difference. First operand 412 states and 413 transitions. Second operand 91 states. [2020-07-07 14:08:01,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:08:01,188 INFO L93 Difference]: Finished difference Result 425 states and 426 transitions. [2020-07-07 14:08:01,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-07-07 14:08:01,193 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 404 [2020-07-07 14:08:01,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:08:01,196 INFO L225 Difference]: With dead ends: 425 [2020-07-07 14:08:01,196 INFO L226 Difference]: Without dead ends: 418 [2020-07-07 14:08:01,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8658 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=642, Invalid=29808, Unknown=0, NotChecked=0, Total=30450 [2020-07-07 14:08:01,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-07-07 14:08:01,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 415. [2020-07-07 14:08:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-07-07 14:08:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 416 transitions. [2020-07-07 14:08:01,293 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 416 transitions. Word has length 404 [2020-07-07 14:08:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:08:01,293 INFO L479 AbstractCegarLoop]: Abstraction has 415 states and 416 transitions. [2020-07-07 14:08:01,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-07-07 14:08:01,294 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 416 transitions. [2020-07-07 14:08:01,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-07-07 14:08:01,295 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:08:01,296 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:08:01,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-07-07 14:08:01,296 INFO L427 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:08:01,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:08:01,296 INFO L82 PathProgramCache]: Analyzing trace with hash -217335744, now seen corresponding path program 45 times [2020-07-07 14:08:01,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:08:01,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129886986] [2020-07-07 14:08:01,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:08:01,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:06,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:08:06,107 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:08:06,107 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129886986] [2020-07-07 14:08:06,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:08:06,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-07-07 14:08:06,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209184891] [2020-07-07 14:08:06,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-07 14:08:06,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:08:06,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-07 14:08:06,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-07-07 14:08:06,109 INFO L87 Difference]: Start difference. First operand 415 states and 416 transitions. Second operand 48 states. [2020-07-07 14:08:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:08:12,755 INFO L93 Difference]: Finished difference Result 439 states and 441 transitions. [2020-07-07 14:08:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-07-07 14:08:12,759 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 411 [2020-07-07 14:08:12,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:08:12,762 INFO L225 Difference]: With dead ends: 439 [2020-07-07 14:08:12,762 INFO L226 Difference]: Without dead ends: 431 [2020-07-07 14:08:12,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-07-07 14:08:12,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-07-07 14:08:12,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 421. [2020-07-07 14:08:12,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-07-07 14:08:12,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 422 transitions. [2020-07-07 14:08:12,864 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 422 transitions. Word has length 411 [2020-07-07 14:08:12,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:08:12,865 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 422 transitions. [2020-07-07 14:08:12,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-07 14:08:12,865 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 422 transitions. [2020-07-07 14:08:12,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-07-07 14:08:12,866 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:08:12,867 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:08:12,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-07-07 14:08:12,867 INFO L427 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:08:12,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:08:12,867 INFO L82 PathProgramCache]: Analyzing trace with hash 215406147, now seen corresponding path program 43 times [2020-07-07 14:08:12,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:08:12,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858008844] [2020-07-07 14:08:12,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:08:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:08:27,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:08:27,651 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:08:27,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858008844] [2020-07-07 14:08:27,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:08:27,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2020-07-07 14:08:27,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103912733] [2020-07-07 14:08:27,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-07-07 14:08:27,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:08:27,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-07-07 14:08:27,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=8329, Unknown=0, NotChecked=0, Total=8556 [2020-07-07 14:08:27,652 INFO L87 Difference]: Start difference. First operand 421 states and 422 transitions. Second operand 93 states. [2020-07-07 14:09:09,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:09:09,580 INFO L93 Difference]: Finished difference Result 434 states and 435 transitions. [2020-07-07 14:09:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-07-07 14:09:09,586 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 413 [2020-07-07 14:09:09,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:09:09,589 INFO L225 Difference]: With dead ends: 434 [2020-07-07 14:09:09,589 INFO L226 Difference]: Without dead ends: 427 [2020-07-07 14:09:09,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9079 ImplicationChecksByTransitivity, 26.4s TimeCoverageRelationStatistics Valid=657, Invalid=31205, Unknown=0, NotChecked=0, Total=31862 [2020-07-07 14:09:09,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-07-07 14:09:09,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 424. [2020-07-07 14:09:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-07-07 14:09:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 425 transitions. [2020-07-07 14:09:09,711 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 425 transitions. Word has length 413 [2020-07-07 14:09:09,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:09:09,711 INFO L479 AbstractCegarLoop]: Abstraction has 424 states and 425 transitions. [2020-07-07 14:09:09,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-07-07 14:09:09,711 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 425 transitions. [2020-07-07 14:09:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-07-07 14:09:09,713 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:09:09,714 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:09:09,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2020-07-07 14:09:09,714 INFO L427 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:09:09,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:09:09,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1803935402, now seen corresponding path program 46 times [2020-07-07 14:09:09,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:09:09,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872259846] [2020-07-07 14:09:09,715 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:09:09,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:09:15,486 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:09:15,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872259846] [2020-07-07 14:09:15,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:09:15,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-07-07 14:09:15,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336244076] [2020-07-07 14:09:15,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-07 14:09:15,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:09:15,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-07 14:09:15,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-07-07 14:09:15,488 INFO L87 Difference]: Start difference. First operand 424 states and 425 transitions. Second operand 49 states. [2020-07-07 14:09:23,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:09:23,740 INFO L93 Difference]: Finished difference Result 448 states and 450 transitions. [2020-07-07 14:09:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-07-07 14:09:23,746 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 420 [2020-07-07 14:09:23,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:09:23,748 INFO L225 Difference]: With dead ends: 448 [2020-07-07 14:09:23,748 INFO L226 Difference]: Without dead ends: 440 [2020-07-07 14:09:23,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-07-07 14:09:23,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-07-07 14:09:23,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 430. [2020-07-07 14:09:23,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-07-07 14:09:23,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 431 transitions. [2020-07-07 14:09:23,889 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 431 transitions. Word has length 420 [2020-07-07 14:09:23,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:09:23,889 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 431 transitions. [2020-07-07 14:09:23,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-07 14:09:23,889 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 431 transitions. [2020-07-07 14:09:23,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-07 14:09:23,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:09:23,891 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:09:23,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2020-07-07 14:09:23,892 INFO L427 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:09:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:09:23,892 INFO L82 PathProgramCache]: Analyzing trace with hash 206524889, now seen corresponding path program 44 times [2020-07-07 14:09:23,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:09:23,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184007990] [2020-07-07 14:09:23,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:09:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:09:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:09:41,677 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:09:41,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184007990] [2020-07-07 14:09:41,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:09:41,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2020-07-07 14:09:41,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142424976] [2020-07-07 14:09:41,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-07-07 14:09:41,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:09:41,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-07-07 14:09:41,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=8698, Unknown=0, NotChecked=0, Total=8930 [2020-07-07 14:09:41,679 INFO L87 Difference]: Start difference. First operand 430 states and 431 transitions. Second operand 95 states. [2020-07-07 14:10:33,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:10:33,680 INFO L93 Difference]: Finished difference Result 443 states and 444 transitions. [2020-07-07 14:10:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-07-07 14:10:33,685 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 422 [2020-07-07 14:10:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:10:33,688 INFO L225 Difference]: With dead ends: 443 [2020-07-07 14:10:33,689 INFO L226 Difference]: Without dead ends: 436 [2020-07-07 14:10:33,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9510 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=672, Invalid=32634, Unknown=0, NotChecked=0, Total=33306 [2020-07-07 14:10:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-07-07 14:10:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 433. [2020-07-07 14:10:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-07-07 14:10:33,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 434 transitions. [2020-07-07 14:10:33,809 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 434 transitions. Word has length 422 [2020-07-07 14:10:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:10:33,810 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 434 transitions. [2020-07-07 14:10:33,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-07-07 14:10:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 434 transitions. [2020-07-07 14:10:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-07-07 14:10:33,812 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:10:33,812 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:10:33,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2020-07-07 14:10:33,812 INFO L427 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:10:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:10:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash -863923968, now seen corresponding path program 47 times [2020-07-07 14:10:33,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:10:33,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745775059] [2020-07-07 14:10:33,813 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:10:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:10:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:10:39,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:10:39,143 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:10:39,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745775059] [2020-07-07 14:10:39,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:10:39,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-07-07 14:10:39,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653255421] [2020-07-07 14:10:39,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-07 14:10:39,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:10:39,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-07 14:10:39,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-07-07 14:10:39,145 INFO L87 Difference]: Start difference. First operand 433 states and 434 transitions. Second operand 50 states. [2020-07-07 14:10:46,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:10:46,214 INFO L93 Difference]: Finished difference Result 457 states and 459 transitions. [2020-07-07 14:10:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-07-07 14:10:46,219 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 429 [2020-07-07 14:10:46,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:10:46,221 INFO L225 Difference]: With dead ends: 457 [2020-07-07 14:10:46,221 INFO L226 Difference]: Without dead ends: 449 [2020-07-07 14:10:46,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-07-07 14:10:46,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-07-07 14:10:46,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 439. [2020-07-07 14:10:46,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-07-07 14:10:46,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 440 transitions. [2020-07-07 14:10:46,338 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 440 transitions. Word has length 429 [2020-07-07 14:10:46,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:10:46,338 INFO L479 AbstractCegarLoop]: Abstraction has 439 states and 440 transitions. [2020-07-07 14:10:46,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-07 14:10:46,338 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 440 transitions. [2020-07-07 14:10:46,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-07-07 14:10:46,340 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:10:46,341 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:10:46,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2020-07-07 14:10:46,341 INFO L427 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:10:46,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:10:46,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1614380803, now seen corresponding path program 45 times [2020-07-07 14:10:46,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:10:46,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694385313] [2020-07-07 14:10:46,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:10:46,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:11:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:11:04,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:11:04,252 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:11:04,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694385313] [2020-07-07 14:11:04,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:11:04,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2020-07-07 14:11:04,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757921678] [2020-07-07 14:11:04,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-07-07 14:11:04,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:11:04,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-07-07 14:11:04,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=9075, Unknown=0, NotChecked=0, Total=9312 [2020-07-07 14:11:04,254 INFO L87 Difference]: Start difference. First operand 439 states and 440 transitions. Second operand 97 states. [2020-07-07 14:11:36,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:11:36,434 INFO L93 Difference]: Finished difference Result 452 states and 453 transitions. [2020-07-07 14:11:36,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-07-07 14:11:36,441 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 431 [2020-07-07 14:11:36,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:11:36,443 INFO L225 Difference]: With dead ends: 452 [2020-07-07 14:11:36,443 INFO L226 Difference]: Without dead ends: 445 [2020-07-07 14:11:36,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9951 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=687, Invalid=34095, Unknown=0, NotChecked=0, Total=34782 [2020-07-07 14:11:36,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-07-07 14:11:36,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 442. [2020-07-07 14:11:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-07-07 14:11:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 443 transitions. [2020-07-07 14:11:36,577 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 443 transitions. Word has length 431 [2020-07-07 14:11:36,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:11:36,578 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 443 transitions. [2020-07-07 14:11:36,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-07-07 14:11:36,578 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 443 transitions. [2020-07-07 14:11:36,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-07-07 14:11:36,580 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:11:36,580 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:11:36,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2020-07-07 14:11:36,581 INFO L427 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:11:36,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:11:36,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1121181546, now seen corresponding path program 48 times [2020-07-07 14:11:36,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:11:36,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142887540] [2020-07-07 14:11:36,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:11:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:11:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:11:42,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:11:42,781 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:11:42,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142887540] [2020-07-07 14:11:42,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:11:42,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-07-07 14:11:42,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499370756] [2020-07-07 14:11:42,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-07 14:11:42,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:11:42,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-07 14:11:42,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-07-07 14:11:42,783 INFO L87 Difference]: Start difference. First operand 442 states and 443 transitions. Second operand 51 states. [2020-07-07 14:11:51,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:11:51,516 INFO L93 Difference]: Finished difference Result 466 states and 468 transitions. [2020-07-07 14:11:51,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-07-07 14:11:51,522 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 438 [2020-07-07 14:11:51,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:11:51,524 INFO L225 Difference]: With dead ends: 466 [2020-07-07 14:11:51,525 INFO L226 Difference]: Without dead ends: 458 [2020-07-07 14:11:51,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-07-07 14:11:51,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-07-07 14:11:51,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 448. [2020-07-07 14:11:51,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-07-07 14:11:51,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 449 transitions. [2020-07-07 14:11:51,642 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 449 transitions. Word has length 438 [2020-07-07 14:11:51,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:11:51,642 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 449 transitions. [2020-07-07 14:11:51,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-07 14:11:51,642 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 449 transitions. [2020-07-07 14:11:51,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2020-07-07 14:11:51,644 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:11:51,645 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:11:51,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2020-07-07 14:11:51,645 INFO L427 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:11:51,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:11:51,645 INFO L82 PathProgramCache]: Analyzing trace with hash -797015783, now seen corresponding path program 46 times [2020-07-07 14:11:51,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:11:51,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164513060] [2020-07-07 14:11:51,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:11:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:12:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:12:10,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:12:10,703 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:12:10,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164513060] [2020-07-07 14:12:10,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:12:10,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2020-07-07 14:12:10,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304716285] [2020-07-07 14:12:10,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-07-07 14:12:10,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:12:10,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-07-07 14:12:10,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=9460, Unknown=0, NotChecked=0, Total=9702 [2020-07-07 14:12:10,705 INFO L87 Difference]: Start difference. First operand 448 states and 449 transitions. Second operand 99 states. [2020-07-07 14:12:45,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:12:45,674 INFO L93 Difference]: Finished difference Result 461 states and 462 transitions. [2020-07-07 14:12:45,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-07-07 14:12:45,680 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 440 [2020-07-07 14:12:45,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:12:45,682 INFO L225 Difference]: With dead ends: 461 [2020-07-07 14:12:45,683 INFO L226 Difference]: Without dead ends: 454 [2020-07-07 14:12:45,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10402 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=702, Invalid=35588, Unknown=0, NotChecked=0, Total=36290 [2020-07-07 14:12:45,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-07-07 14:12:45,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 451. [2020-07-07 14:12:45,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-07-07 14:12:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 452 transitions. [2020-07-07 14:12:45,793 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 452 transitions. Word has length 440 [2020-07-07 14:12:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:12:45,794 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 452 transitions. [2020-07-07 14:12:45,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-07-07 14:12:45,794 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 452 transitions. [2020-07-07 14:12:45,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-07-07 14:12:45,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:12:45,797 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:12:45,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2020-07-07 14:12:45,797 INFO L427 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:12:45,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:12:45,798 INFO L82 PathProgramCache]: Analyzing trace with hash 351975872, now seen corresponding path program 49 times [2020-07-07 14:12:45,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:12:45,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632994884] [2020-07-07 14:12:45,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:12:45,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:12:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:12:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:12:51,345 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:12:51,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632994884] [2020-07-07 14:12:51,345 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:12:51,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-07-07 14:12:51,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139648555] [2020-07-07 14:12:51,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-07 14:12:51,346 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:12:51,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-07 14:12:51,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-07-07 14:12:51,347 INFO L87 Difference]: Start difference. First operand 451 states and 452 transitions. Second operand 52 states. [2020-07-07 14:12:59,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:12:59,219 INFO L93 Difference]: Finished difference Result 475 states and 477 transitions. [2020-07-07 14:12:59,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-07-07 14:12:59,223 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 447 [2020-07-07 14:12:59,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:12:59,226 INFO L225 Difference]: With dead ends: 475 [2020-07-07 14:12:59,226 INFO L226 Difference]: Without dead ends: 467 [2020-07-07 14:12:59,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-07-07 14:12:59,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-07-07 14:12:59,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 457. [2020-07-07 14:12:59,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-07-07 14:12:59,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 458 transitions. [2020-07-07 14:12:59,338 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 458 transitions. Word has length 447 [2020-07-07 14:12:59,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:12:59,338 INFO L479 AbstractCegarLoop]: Abstraction has 457 states and 458 transitions. [2020-07-07 14:12:59,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-07 14:12:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 458 transitions. [2020-07-07 14:12:59,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-07 14:12:59,341 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:12:59,341 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:12:59,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2020-07-07 14:12:59,342 INFO L427 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:12:59,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:12:59,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1863022531, now seen corresponding path program 47 times [2020-07-07 14:12:59,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:12:59,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231161491] [2020-07-07 14:12:59,343 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:12:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:13:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:13:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:13:15,677 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:13:15,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231161491] [2020-07-07 14:13:15,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:13:15,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2020-07-07 14:13:15,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142566540] [2020-07-07 14:13:15,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-07-07 14:13:15,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:13:15,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-07-07 14:13:15,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=9853, Unknown=0, NotChecked=0, Total=10100 [2020-07-07 14:13:15,679 INFO L87 Difference]: Start difference. First operand 457 states and 458 transitions. Second operand 101 states. [2020-07-07 14:14:03,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:14:03,828 INFO L93 Difference]: Finished difference Result 470 states and 471 transitions. [2020-07-07 14:14:03,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-07-07 14:14:03,834 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 449 [2020-07-07 14:14:03,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:14:03,836 INFO L225 Difference]: With dead ends: 470 [2020-07-07 14:14:03,837 INFO L226 Difference]: Without dead ends: 463 [2020-07-07 14:14:03,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10863 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=717, Invalid=37113, Unknown=0, NotChecked=0, Total=37830 [2020-07-07 14:14:03,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-07-07 14:14:03,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 460. [2020-07-07 14:14:03,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-07-07 14:14:03,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 461 transitions. [2020-07-07 14:14:03,951 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 461 transitions. Word has length 449 [2020-07-07 14:14:03,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:14:03,951 INFO L479 AbstractCegarLoop]: Abstraction has 460 states and 461 transitions. [2020-07-07 14:14:03,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-07-07 14:14:03,951 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 461 transitions. [2020-07-07 14:14:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-07-07 14:14:03,953 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:14:03,954 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:14:03,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2020-07-07 14:14:03,954 INFO L427 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:14:03,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:14:03,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1651191850, now seen corresponding path program 50 times [2020-07-07 14:14:03,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:14:03,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [828938742] [2020-07-07 14:14:03,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:14:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:14:09,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:14:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:14:09,966 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:14:09,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [828938742] [2020-07-07 14:14:09,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:14:09,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2020-07-07 14:14:09,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496960567] [2020-07-07 14:14:09,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-07 14:14:09,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:14:09,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-07 14:14:09,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-07-07 14:14:09,967 INFO L87 Difference]: Start difference. First operand 460 states and 461 transitions. Second operand 53 states. [2020-07-07 14:14:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:14:18,503 INFO L93 Difference]: Finished difference Result 484 states and 486 transitions. [2020-07-07 14:14:18,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-07 14:14:18,509 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 456 [2020-07-07 14:14:18,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:14:18,512 INFO L225 Difference]: With dead ends: 484 [2020-07-07 14:14:18,512 INFO L226 Difference]: Without dead ends: 476 [2020-07-07 14:14:18,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-07-07 14:14:18,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-07-07 14:14:18,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 466. [2020-07-07 14:14:18,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-07-07 14:14:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 467 transitions. [2020-07-07 14:14:18,628 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 467 transitions. Word has length 456 [2020-07-07 14:14:18,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:14:18,628 INFO L479 AbstractCegarLoop]: Abstraction has 466 states and 467 transitions. [2020-07-07 14:14:18,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-07 14:14:18,628 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 467 transitions. [2020-07-07 14:14:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-07-07 14:14:18,631 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:14:18,631 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:14:18,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2020-07-07 14:14:18,632 INFO L427 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:14:18,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:14:18,632 INFO L82 PathProgramCache]: Analyzing trace with hash 964190297, now seen corresponding path program 48 times [2020-07-07 14:14:18,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:14:18,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617940796] [2020-07-07 14:14:18,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:14:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:14:37,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:14:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:14:37,406 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:14:37,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617940796] [2020-07-07 14:14:37,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:14:37,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2020-07-07 14:14:37,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76022163] [2020-07-07 14:14:37,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-07-07 14:14:37,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:14:37,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-07-07 14:14:37,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=10254, Unknown=0, NotChecked=0, Total=10506 [2020-07-07 14:14:37,409 INFO L87 Difference]: Start difference. First operand 466 states and 467 transitions. Second operand 103 states.