/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:08:45,028 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:08:45,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:08:45,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:08:45,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:08:45,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:08:45,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:08:45,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:08:45,065 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:08:45,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:08:45,069 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:08:45,071 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:08:45,071 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:08:45,073 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:08:45,075 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:08:45,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:08:45,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:08:45,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:08:45,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:08:45,084 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:08:45,088 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:08:45,091 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:08:45,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:08:45,093 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:08:45,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 18:08:45,100 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 18:08:45,101 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 18:08:45,101 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 18:08:45,102 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 18:08:45,103 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 18:08:45,103 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 18:08:45,104 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 18:08:45,104 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 18:08:45,104 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:08:45,105 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:08:45,108 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:08:45,109 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 18:08:45,136 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:08:45,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:08:45,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:08:45,141 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:08:45,141 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:08:45,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:08:45,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:08:45,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:08:45,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:08:45,142 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:08:45,142 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:08:45,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:08:45,143 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:08:45,143 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:08:45,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:08:45,146 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:08:45,146 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:08:45,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:08:45,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:08:45,147 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:08:45,147 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:08:45,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:08:45,147 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-17 18:08:45,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:08:45,416 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:08:45,419 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:08:45,421 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:08:45,421 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:08:45,422 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-07-17 18:08:45,496 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45124c027/24d1bc1f46314aa188263cb15dc565f5/FLAGddf465bdf [2020-07-17 18:08:45,927 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:08:45,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-07-17 18:08:45,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45124c027/24d1bc1f46314aa188263cb15dc565f5/FLAGddf465bdf [2020-07-17 18:08:46,303 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45124c027/24d1bc1f46314aa188263cb15dc565f5 [2020-07-17 18:08:46,311 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:08:46,314 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:08:46,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:08:46,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:08:46,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:08:46,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:08:46" (1/1) ... [2020-07-17 18:08:46,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6abe2623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:46, skipping insertion in model container [2020-07-17 18:08:46,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:08:46" (1/1) ... [2020-07-17 18:08:46,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:08:46,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:08:46,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:08:46,503 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:08:46,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:08:46,533 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:08:46,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:46 WrapperNode [2020-07-17 18:08:46,533 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:08:46,534 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:08:46,534 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:08:46,534 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:08:46,547 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:46" (1/1) ... [2020-07-17 18:08:46,547 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:46" (1/1) ... [2020-07-17 18:08:46,552 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:46" (1/1) ... [2020-07-17 18:08:46,553 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:46" (1/1) ... [2020-07-17 18:08:46,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:46" (1/1) ... [2020-07-17 18:08:46,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:46" (1/1) ... [2020-07-17 18:08:46,561 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:46" (1/1) ... [2020-07-17 18:08:46,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:08:46,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:08:46,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:08:46,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:08:46,637 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:46" (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 [2020-07-17 18:08:46,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:08:46,698 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:08:46,698 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 18:08:46,698 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:08:46,698 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:08:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:08:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 18:08:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 18:08:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:08:46,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 18:08:46,699 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:08:46,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:08:46,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:08:46,882 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:08:46,882 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 18:08:46,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:08:46 BoogieIcfgContainer [2020-07-17 18:08:46,888 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:08:46,890 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:08:46,890 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:08:46,895 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:08:46,895 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:08:46" (1/3) ... [2020-07-17 18:08:46,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b67fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:08:46, skipping insertion in model container [2020-07-17 18:08:46,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:46" (2/3) ... [2020-07-17 18:08:46,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b67fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:08:46, skipping insertion in model container [2020-07-17 18:08:46,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:08:46" (3/3) ... [2020-07-17 18:08:46,899 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-07-17 18:08:46,910 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:08:46,920 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:08:46,933 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:08:46,958 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:08:46,958 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:08:46,958 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:08:46,959 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:08:46,959 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:08:46,959 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:08:46,959 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:08:46,959 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:08:46,975 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-07-17 18:08:46,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-07-17 18:08:46,986 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:46,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:46,987 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:47,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:47,000 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-07-17 18:08:47,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:47,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1782734626] [2020-07-17 18:08:47,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:47,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:47,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:47,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1782734626] [2020-07-17 18:08:47,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:08:47,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-17 18:08:47,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041931046] [2020-07-17 18:08:47,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-17 18:08:47,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:47,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-17 18:08:47,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-17 18:08:47,173 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-07-17 18:08:47,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:47,198 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-07-17 18:08:47,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-17 18:08:47,200 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-07-17 18:08:47,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:47,208 INFO L225 Difference]: With dead ends: 41 [2020-07-17 18:08:47,208 INFO L226 Difference]: Without dead ends: 22 [2020-07-17 18:08:47,212 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 [2020-07-17 18:08:47,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-07-17 18:08:47,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-07-17 18:08:47,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-07-17 18:08:47,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-07-17 18:08:47,251 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2020-07-17 18:08:47,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:47,252 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-07-17 18:08:47,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-17 18:08:47,252 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-07-17 18:08:47,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-17 18:08:47,253 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:47,253 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:47,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:08:47,254 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:47,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:47,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1179723712, now seen corresponding path program 1 times [2020-07-17 18:08:47,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:47,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986731677] [2020-07-17 18:08:47,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:47,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986731677] [2020-07-17 18:08:47,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:08:47,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 18:08:47,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367391093] [2020-07-17 18:08:47,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 18:08:47,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:47,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 18:08:47,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 18:08:47,316 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2020-07-17 18:08:47,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:47,381 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-07-17 18:08:47,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 18:08:47,382 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-07-17 18:08:47,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:47,385 INFO L225 Difference]: With dead ends: 50 [2020-07-17 18:08:47,385 INFO L226 Difference]: Without dead ends: 34 [2020-07-17 18:08:47,386 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 [2020-07-17 18:08:47,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-07-17 18:08:47,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2020-07-17 18:08:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-17 18:08:47,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-17 18:08:47,396 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-07-17 18:08:47,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:47,397 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-17 18:08:47,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 18:08:47,397 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-17 18:08:47,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-07-17 18:08:47,398 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:47,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:47,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:08:47,399 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:47,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:47,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1535220285, now seen corresponding path program 1 times [2020-07-17 18:08:47,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:47,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602280074] [2020-07-17 18:08:47,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:47,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602280074] [2020-07-17 18:08:47,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:08:47,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 18:08:47,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679109948] [2020-07-17 18:08:47,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 18:08:47,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:47,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 18:08:47,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 18:08:47,589 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-07-17 18:08:47,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:47,688 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-07-17 18:08:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 18:08:47,689 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-07-17 18:08:47,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:47,691 INFO L225 Difference]: With dead ends: 38 [2020-07-17 18:08:47,691 INFO L226 Difference]: Without dead ends: 31 [2020-07-17 18:08:47,692 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 [2020-07-17 18:08:47,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-17 18:08:47,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-07-17 18:08:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-17 18:08:47,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-17 18:08:47,710 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 17 [2020-07-17 18:08:47,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:47,711 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-17 18:08:47,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 18:08:47,711 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-17 18:08:47,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 18:08:47,712 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:47,713 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] [2020-07-17 18:08:47,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 18:08:47,713 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:47,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:47,714 INFO L82 PathProgramCache]: Analyzing trace with hash 463086038, now seen corresponding path program 1 times [2020-07-17 18:08:47,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:47,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633539823] [2020-07-17 18:08:47,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:47,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:47,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633539823] [2020-07-17 18:08:47,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:47,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-07-17 18:08:47,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074857996] [2020-07-17 18:08:47,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 18:08:47,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:47,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 18:08:47,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 18:08:47,804 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-07-17 18:08:47,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:47,866 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-07-17 18:08:47,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 18:08:47,867 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-07-17 18:08:47,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:47,868 INFO L225 Difference]: With dead ends: 59 [2020-07-17 18:08:47,868 INFO L226 Difference]: Without dead ends: 43 [2020-07-17 18:08:47,869 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 [2020-07-17 18:08:47,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-17 18:08:47,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-07-17 18:08:47,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-17 18:08:47,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-17 18:08:47,878 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 24 [2020-07-17 18:08:47,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:47,878 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-17 18:08:47,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 18:08:47,879 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-17 18:08:47,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-17 18:08:47,880 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:47,880 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] [2020-07-17 18:08:47,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 18:08:47,880 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:47,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:47,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1265709657, now seen corresponding path program 1 times [2020-07-17 18:08:47,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:47,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377655617] [2020-07-17 18:08:47,882 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:47,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377655617] [2020-07-17 18:08:47,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:47,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 18:08:47,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447106309] [2020-07-17 18:08:47,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 18:08:47,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:47,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 18:08:47,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-07-17 18:08:47,965 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-07-17 18:08:48,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:48,029 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-17 18:08:48,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 18:08:48,029 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-07-17 18:08:48,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:48,030 INFO L225 Difference]: With dead ends: 46 [2020-07-17 18:08:48,031 INFO L226 Difference]: Without dead ends: 39 [2020-07-17 18:08:48,031 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 [2020-07-17 18:08:48,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-17 18:08:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-07-17 18:08:48,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-17 18:08:48,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-17 18:08:48,041 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2020-07-17 18:08:48,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:48,042 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-17 18:08:48,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 18:08:48,042 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-17 18:08:48,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-17 18:08:48,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:48,043 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] [2020-07-17 18:08:48,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 18:08:48,044 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:48,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:48,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1847206016, now seen corresponding path program 2 times [2020-07-17 18:08:48,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:48,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211549364] [2020-07-17 18:08:48,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:48,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:48,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211549364] [2020-07-17 18:08:48,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:48,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-17 18:08:48,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905601317] [2020-07-17 18:08:48,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 18:08:48,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:48,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 18:08:48,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-07-17 18:08:48,107 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 6 states. [2020-07-17 18:08:48,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:48,180 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-07-17 18:08:48,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 18:08:48,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-07-17 18:08:48,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:48,182 INFO L225 Difference]: With dead ends: 68 [2020-07-17 18:08:48,182 INFO L226 Difference]: Without dead ends: 52 [2020-07-17 18:08:48,183 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 [2020-07-17 18:08:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-17 18:08:48,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-07-17 18:08:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 18:08:48,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-17 18:08:48,191 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 33 [2020-07-17 18:08:48,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:48,192 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-17 18:08:48,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 18:08:48,192 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-17 18:08:48,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-07-17 18:08:48,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:48,193 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] [2020-07-17 18:08:48,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 18:08:48,194 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:48,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:48,194 INFO L82 PathProgramCache]: Analyzing trace with hash -34853245, now seen corresponding path program 2 times [2020-07-17 18:08:48,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:48,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406582464] [2020-07-17 18:08:48,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:48,283 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:48,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406582464] [2020-07-17 18:08:48,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:48,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 18:08:48,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058411055] [2020-07-17 18:08:48,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 18:08:48,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:48,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 18:08:48,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 18:08:48,288 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 8 states. [2020-07-17 18:08:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:48,389 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-17 18:08:48,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 18:08:48,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-07-17 18:08:48,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:48,391 INFO L225 Difference]: With dead ends: 55 [2020-07-17 18:08:48,391 INFO L226 Difference]: Without dead ends: 48 [2020-07-17 18:08:48,392 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 [2020-07-17 18:08:48,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-17 18:08:48,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-07-17 18:08:48,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-17 18:08:48,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-17 18:08:48,406 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 35 [2020-07-17 18:08:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:48,407 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-17 18:08:48,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 18:08:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-17 18:08:48,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-07-17 18:08:48,409 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:48,410 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] [2020-07-17 18:08:48,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 18:08:48,411 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:48,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:48,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1854078698, now seen corresponding path program 3 times [2020-07-17 18:08:48,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:48,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118210500] [2020-07-17 18:08:48,413 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:48,498 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:48,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118210500] [2020-07-17 18:08:48,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:48,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 18:08:48,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243117003] [2020-07-17 18:08:48,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 18:08:48,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:48,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 18:08:48,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-07-17 18:08:48,502 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 7 states. [2020-07-17 18:08:48,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:48,591 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-07-17 18:08:48,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 18:08:48,592 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-07-17 18:08:48,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:48,594 INFO L225 Difference]: With dead ends: 77 [2020-07-17 18:08:48,594 INFO L226 Difference]: Without dead ends: 61 [2020-07-17 18:08:48,595 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 [2020-07-17 18:08:48,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-07-17 18:08:48,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2020-07-17 18:08:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-17 18:08:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-17 18:08:48,607 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 42 [2020-07-17 18:08:48,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:48,607 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-17 18:08:48,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 18:08:48,607 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-17 18:08:48,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-07-17 18:08:48,611 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:48,611 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] [2020-07-17 18:08:48,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 18:08:48,612 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:48,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:48,615 INFO L82 PathProgramCache]: Analyzing trace with hash -736542311, now seen corresponding path program 3 times [2020-07-17 18:08:48,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:48,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538687066] [2020-07-17 18:08:48,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:48,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:48,789 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:48,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538687066] [2020-07-17 18:08:48,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:48,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-17 18:08:48,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311884910] [2020-07-17 18:08:48,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 18:08:48,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:48,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 18:08:48,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-07-17 18:08:48,791 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 11 states. [2020-07-17 18:08:48,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:48,953 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-17 18:08:48,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 18:08:48,954 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-07-17 18:08:48,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:48,955 INFO L225 Difference]: With dead ends: 64 [2020-07-17 18:08:48,956 INFO L226 Difference]: Without dead ends: 57 [2020-07-17 18:08:48,956 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 [2020-07-17 18:08:48,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-17 18:08:48,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-07-17 18:08:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-17 18:08:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-17 18:08:48,965 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 44 [2020-07-17 18:08:48,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:48,966 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-17 18:08:48,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 18:08:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-17 18:08:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-07-17 18:08:48,967 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:48,968 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] [2020-07-17 18:08:48,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 18:08:48,968 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:48,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:48,968 INFO L82 PathProgramCache]: Analyzing trace with hash -2107741888, now seen corresponding path program 4 times [2020-07-17 18:08:48,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:48,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119846830] [2020-07-17 18:08:48,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,037 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:49,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119846830] [2020-07-17 18:08:49,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:49,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 18:08:49,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721347243] [2020-07-17 18:08:49,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 18:08:49,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:49,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 18:08:49,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-07-17 18:08:49,040 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 8 states. [2020-07-17 18:08:49,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:49,160 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-07-17 18:08:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 18:08:49,161 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-07-17 18:08:49,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:49,162 INFO L225 Difference]: With dead ends: 86 [2020-07-17 18:08:49,162 INFO L226 Difference]: Without dead ends: 70 [2020-07-17 18:08:49,163 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 [2020-07-17 18:08:49,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-17 18:08:49,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-07-17 18:08:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-17 18:08:49,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-17 18:08:49,172 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 51 [2020-07-17 18:08:49,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:49,172 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-17 18:08:49,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 18:08:49,172 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-17 18:08:49,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-07-17 18:08:49,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:49,173 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] [2020-07-17 18:08:49,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 18:08:49,174 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:49,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:49,174 INFO L82 PathProgramCache]: Analyzing trace with hash 306267971, now seen corresponding path program 4 times [2020-07-17 18:08:49,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:49,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457292423] [2020-07-17 18:08:49,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,307 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:49,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457292423] [2020-07-17 18:08:49,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:49,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-17 18:08:49,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28309017] [2020-07-17 18:08:49,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 18:08:49,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:49,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 18:08:49,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-07-17 18:08:49,309 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 13 states. [2020-07-17 18:08:49,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:49,500 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-17 18:08:49,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 18:08:49,500 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-07-17 18:08:49,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:49,501 INFO L225 Difference]: With dead ends: 73 [2020-07-17 18:08:49,501 INFO L226 Difference]: Without dead ends: 66 [2020-07-17 18:08:49,502 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 [2020-07-17 18:08:49,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-17 18:08:49,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-07-17 18:08:49,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-17 18:08:49,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-17 18:08:49,511 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 53 [2020-07-17 18:08:49,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:49,511 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-17 18:08:49,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 18:08:49,511 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-17 18:08:49,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-07-17 18:08:49,512 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:49,512 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] [2020-07-17 18:08:49,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 18:08:49,513 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:49,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:49,513 INFO L82 PathProgramCache]: Analyzing trace with hash -392261546, now seen corresponding path program 5 times [2020-07-17 18:08:49,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:49,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694964348] [2020-07-17 18:08:49,514 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,584 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:49,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694964348] [2020-07-17 18:08:49,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:49,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 18:08:49,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544361681] [2020-07-17 18:08:49,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 18:08:49,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:49,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 18:08:49,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-07-17 18:08:49,586 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 9 states. [2020-07-17 18:08:49,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:49,693 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-07-17 18:08:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 18:08:49,694 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-07-17 18:08:49,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:49,695 INFO L225 Difference]: With dead ends: 95 [2020-07-17 18:08:49,695 INFO L226 Difference]: Without dead ends: 79 [2020-07-17 18:08:49,696 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 [2020-07-17 18:08:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-17 18:08:49,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-07-17 18:08:49,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-17 18:08:49,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-17 18:08:49,705 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2020-07-17 18:08:49,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:49,705 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-17 18:08:49,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 18:08:49,706 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-17 18:08:49,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-17 18:08:49,706 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:49,706 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] [2020-07-17 18:08:49,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 18:08:49,707 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:49,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:49,707 INFO L82 PathProgramCache]: Analyzing trace with hash -384565031, now seen corresponding path program 5 times [2020-07-17 18:08:49,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:49,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970570236] [2020-07-17 18:08:49,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,877 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:49,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970570236] [2020-07-17 18:08:49,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:49,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-17 18:08:49,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156778351] [2020-07-17 18:08:49,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 18:08:49,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:49,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 18:08:49,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-07-17 18:08:49,879 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 15 states. [2020-07-17 18:08:50,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:50,094 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-07-17 18:08:50,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 18:08:50,094 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-07-17 18:08:50,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:50,095 INFO L225 Difference]: With dead ends: 82 [2020-07-17 18:08:50,095 INFO L226 Difference]: Without dead ends: 75 [2020-07-17 18:08:50,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-07-17 18:08:50,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-17 18:08:50,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-07-17 18:08:50,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-17 18:08:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-17 18:08:50,106 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 62 [2020-07-17 18:08:50,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:50,106 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-17 18:08:50,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 18:08:50,107 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-17 18:08:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-07-17 18:08:50,107 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:50,107 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] [2020-07-17 18:08:50,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 18:08:50,108 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:50,108 INFO L82 PathProgramCache]: Analyzing trace with hash -1192623616, now seen corresponding path program 6 times [2020-07-17 18:08:50,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:50,109 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530538117] [2020-07-17 18:08:50,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:50,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:50,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 6 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:50,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530538117] [2020-07-17 18:08:50,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:50,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 18:08:50,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758586803] [2020-07-17 18:08:50,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 18:08:50,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:50,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 18:08:50,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-07-17 18:08:50,187 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 10 states. [2020-07-17 18:08:50,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:50,317 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2020-07-17 18:08:50,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 18:08:50,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-07-17 18:08:50,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:50,318 INFO L225 Difference]: With dead ends: 104 [2020-07-17 18:08:50,318 INFO L226 Difference]: Without dead ends: 88 [2020-07-17 18:08:50,319 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 [2020-07-17 18:08:50,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-17 18:08:50,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-07-17 18:08:50,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-17 18:08:50,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-07-17 18:08:50,330 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 69 [2020-07-17 18:08:50,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:50,331 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-07-17 18:08:50,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 18:08:50,331 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-07-17 18:08:50,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-07-17 18:08:50,332 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:50,332 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] [2020-07-17 18:08:50,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 18:08:50,332 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:50,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:50,333 INFO L82 PathProgramCache]: Analyzing trace with hash -733368317, now seen corresponding path program 6 times [2020-07-17 18:08:50,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:50,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969024651] [2020-07-17 18:08:50,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:50,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:50,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969024651] [2020-07-17 18:08:50,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:50,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-17 18:08:50,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767961517] [2020-07-17 18:08:50,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 18:08:50,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:50,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 18:08:50,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-07-17 18:08:50,523 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 17 states. [2020-07-17 18:08:50,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:50,836 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-07-17 18:08:50,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 18:08:50,836 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-07-17 18:08:50,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:50,837 INFO L225 Difference]: With dead ends: 91 [2020-07-17 18:08:50,837 INFO L226 Difference]: Without dead ends: 84 [2020-07-17 18:08:50,838 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 [2020-07-17 18:08:50,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-17 18:08:50,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-07-17 18:08:50,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-17 18:08:50,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-07-17 18:08:50,852 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 71 [2020-07-17 18:08:50,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:50,853 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-07-17 18:08:50,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 18:08:50,853 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-07-17 18:08:50,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-17 18:08:50,854 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:50,854 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] [2020-07-17 18:08:50,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 18:08:50,854 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:50,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:50,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1330458730, now seen corresponding path program 7 times [2020-07-17 18:08:50,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:50,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911371366] [2020-07-17 18:08:50,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:50,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:50,968 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 7 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:50,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911371366] [2020-07-17 18:08:50,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:50,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-17 18:08:50,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716353886] [2020-07-17 18:08:50,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 18:08:50,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:50,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 18:08:50,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-07-17 18:08:50,970 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 11 states. [2020-07-17 18:08:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:51,107 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-07-17 18:08:51,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 18:08:51,107 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2020-07-17 18:08:51,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:51,108 INFO L225 Difference]: With dead ends: 113 [2020-07-17 18:08:51,108 INFO L226 Difference]: Without dead ends: 97 [2020-07-17 18:08:51,109 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 [2020-07-17 18:08:51,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-17 18:08:51,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-07-17 18:08:51,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-17 18:08:51,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-07-17 18:08:51,122 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 78 [2020-07-17 18:08:51,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:51,122 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-07-17 18:08:51,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 18:08:51,123 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-07-17 18:08:51,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-17 18:08:51,123 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:51,123 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] [2020-07-17 18:08:51,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 18:08:51,124 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:51,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:51,124 INFO L82 PathProgramCache]: Analyzing trace with hash -48926695, now seen corresponding path program 7 times [2020-07-17 18:08:51,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:51,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677049571] [2020-07-17 18:08:51,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:51,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677049571] [2020-07-17 18:08:51,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:51,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-17 18:08:51,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780976655] [2020-07-17 18:08:51,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 18:08:51,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:51,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 18:08:51,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-07-17 18:08:51,375 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 19 states. [2020-07-17 18:08:51,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:51,716 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-07-17 18:08:51,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 18:08:51,717 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2020-07-17 18:08:51,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:51,718 INFO L225 Difference]: With dead ends: 100 [2020-07-17 18:08:51,718 INFO L226 Difference]: Without dead ends: 93 [2020-07-17 18:08:51,719 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 [2020-07-17 18:08:51,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-17 18:08:51,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2020-07-17 18:08:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-17 18:08:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-07-17 18:08:51,736 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 80 [2020-07-17 18:08:51,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:51,736 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-07-17 18:08:51,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 18:08:51,736 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-07-17 18:08:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-07-17 18:08:51,737 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:51,737 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] [2020-07-17 18:08:51,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 18:08:51,738 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:51,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:51,738 INFO L82 PathProgramCache]: Analyzing trace with hash -326571328, now seen corresponding path program 8 times [2020-07-17 18:08:51,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:51,739 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031686690] [2020-07-17 18:08:51,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,868 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 8 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:51,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031686690] [2020-07-17 18:08:51,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:51,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 18:08:51,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524916328] [2020-07-17 18:08:51,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 18:08:51,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:51,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 18:08:51,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-07-17 18:08:51,876 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 12 states. [2020-07-17 18:08:52,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:52,026 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-07-17 18:08:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-17 18:08:52,027 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-07-17 18:08:52,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:52,028 INFO L225 Difference]: With dead ends: 122 [2020-07-17 18:08:52,028 INFO L226 Difference]: Without dead ends: 106 [2020-07-17 18:08:52,029 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 [2020-07-17 18:08:52,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-07-17 18:08:52,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2020-07-17 18:08:52,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-17 18:08:52,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-07-17 18:08:52,042 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 87 [2020-07-17 18:08:52,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:52,042 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-07-17 18:08:52,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 18:08:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-07-17 18:08:52,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-07-17 18:08:52,043 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:52,043 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] [2020-07-17 18:08:52,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 18:08:52,044 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:52,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:52,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1680774973, now seen corresponding path program 8 times [2020-07-17 18:08:52,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:52,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875914417] [2020-07-17 18:08:52,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:52,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875914417] [2020-07-17 18:08:52,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:52,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-17 18:08:52,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933486818] [2020-07-17 18:08:52,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-17 18:08:52,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:52,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-17 18:08:52,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-07-17 18:08:52,345 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 21 states. [2020-07-17 18:08:52,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:52,788 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2020-07-17 18:08:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-17 18:08:52,789 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2020-07-17 18:08:52,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:52,790 INFO L225 Difference]: With dead ends: 109 [2020-07-17 18:08:52,790 INFO L226 Difference]: Without dead ends: 102 [2020-07-17 18:08:52,791 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2020-07-17 18:08:52,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-07-17 18:08:52,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-07-17 18:08:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-17 18:08:52,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-07-17 18:08:52,809 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 89 [2020-07-17 18:08:52,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:52,810 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-07-17 18:08:52,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-17 18:08:52,810 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-07-17 18:08:52,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-17 18:08:52,814 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:52,814 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] [2020-07-17 18:08:52,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 18:08:52,815 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:52,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:52,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1953349334, now seen corresponding path program 9 times [2020-07-17 18:08:52,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:52,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786824883] [2020-07-17 18:08:52,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:52,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 9 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:52,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786824883] [2020-07-17 18:08:52,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:52,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-17 18:08:52,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662487454] [2020-07-17 18:08:52,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 18:08:52,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:52,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 18:08:52,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-07-17 18:08:52,943 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 13 states. [2020-07-17 18:08:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:53,146 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2020-07-17 18:08:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-17 18:08:53,147 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-07-17 18:08:53,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:53,148 INFO L225 Difference]: With dead ends: 131 [2020-07-17 18:08:53,149 INFO L226 Difference]: Without dead ends: 115 [2020-07-17 18:08:53,149 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 [2020-07-17 18:08:53,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-07-17 18:08:53,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2020-07-17 18:08:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-07-17 18:08:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-07-17 18:08:53,168 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 96 [2020-07-17 18:08:53,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:53,169 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-07-17 18:08:53,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 18:08:53,169 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-07-17 18:08:53,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-07-17 18:08:53,171 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:53,171 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] [2020-07-17 18:08:53,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 18:08:53,172 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:53,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:53,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1110339751, now seen corresponding path program 9 times [2020-07-17 18:08:53,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:53,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308600691] [2020-07-17 18:08:53,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:53,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308600691] [2020-07-17 18:08:53,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:53,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-17 18:08:53,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900169288] [2020-07-17 18:08:53,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-17 18:08:53,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:53,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-17 18:08:53,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-07-17 18:08:53,512 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 23 states. [2020-07-17 18:08:54,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:54,000 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2020-07-17 18:08:54,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-17 18:08:54,001 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 98 [2020-07-17 18:08:54,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:54,002 INFO L225 Difference]: With dead ends: 118 [2020-07-17 18:08:54,002 INFO L226 Difference]: Without dead ends: 111 [2020-07-17 18:08:54,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2020-07-17 18:08:54,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-07-17 18:08:54,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-07-17 18:08:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-17 18:08:54,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-07-17 18:08:54,023 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 98 [2020-07-17 18:08:54,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:54,023 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-07-17 18:08:54,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-17 18:08:54,023 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-07-17 18:08:54,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-07-17 18:08:54,024 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:54,024 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] [2020-07-17 18:08:54,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-17 18:08:54,025 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:54,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:54,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1560748928, now seen corresponding path program 10 times [2020-07-17 18:08:54,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:54,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511629672] [2020-07-17 18:08:54,026 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:54,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,150 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 10 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:54,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511629672] [2020-07-17 18:08:54,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:54,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-17 18:08:54,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316817010] [2020-07-17 18:08:54,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 18:08:54,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:54,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 18:08:54,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-07-17 18:08:54,153 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 14 states. [2020-07-17 18:08:54,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:54,443 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2020-07-17 18:08:54,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-17 18:08:54,443 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 105 [2020-07-17 18:08:54,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:54,445 INFO L225 Difference]: With dead ends: 140 [2020-07-17 18:08:54,445 INFO L226 Difference]: Without dead ends: 124 [2020-07-17 18:08:54,446 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 [2020-07-17 18:08:54,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-07-17 18:08:54,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2020-07-17 18:08:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-17 18:08:54,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-07-17 18:08:54,463 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 105 [2020-07-17 18:08:54,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:54,464 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-07-17 18:08:54,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 18:08:54,464 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-07-17 18:08:54,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-07-17 18:08:54,466 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:54,466 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] [2020-07-17 18:08:54,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-17 18:08:54,467 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:54,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:54,468 INFO L82 PathProgramCache]: Analyzing trace with hash -442207869, now seen corresponding path program 10 times [2020-07-17 18:08:54,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:54,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048177632] [2020-07-17 18:08:54,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:54,952 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 455 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:54,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048177632] [2020-07-17 18:08:54,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:54,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-17 18:08:54,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252772808] [2020-07-17 18:08:54,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-17 18:08:54,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:54,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-17 18:08:54,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-07-17 18:08:54,955 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 25 states. [2020-07-17 18:08:55,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:55,603 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2020-07-17 18:08:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-17 18:08:55,604 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 107 [2020-07-17 18:08:55,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:55,605 INFO L225 Difference]: With dead ends: 127 [2020-07-17 18:08:55,605 INFO L226 Difference]: Without dead ends: 120 [2020-07-17 18:08:55,606 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 [2020-07-17 18:08:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-07-17 18:08:55,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-07-17 18:08:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-07-17 18:08:55,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-07-17 18:08:55,621 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 107 [2020-07-17 18:08:55,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:55,621 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-07-17 18:08:55,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-17 18:08:55,622 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-07-17 18:08:55,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-07-17 18:08:55,622 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:55,623 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] [2020-07-17 18:08:55,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-17 18:08:55,623 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:55,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:55,623 INFO L82 PathProgramCache]: Analyzing trace with hash -108831210, now seen corresponding path program 11 times [2020-07-17 18:08:55,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:55,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025692561] [2020-07-17 18:08:55,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:55,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:55,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:55,765 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 11 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:55,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025692561] [2020-07-17 18:08:55,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:55,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-17 18:08:55,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016799702] [2020-07-17 18:08:55,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 18:08:55,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:55,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 18:08:55,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-07-17 18:08:55,767 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 15 states. [2020-07-17 18:08:56,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:56,047 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2020-07-17 18:08:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-17 18:08:56,048 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 114 [2020-07-17 18:08:56,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:56,050 INFO L225 Difference]: With dead ends: 149 [2020-07-17 18:08:56,050 INFO L226 Difference]: Without dead ends: 133 [2020-07-17 18:08:56,051 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 [2020-07-17 18:08:56,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-17 18:08:56,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2020-07-17 18:08:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-17 18:08:56,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2020-07-17 18:08:56,077 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 114 [2020-07-17 18:08:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:56,077 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2020-07-17 18:08:56,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 18:08:56,078 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2020-07-17 18:08:56,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-07-17 18:08:56,080 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:56,080 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] [2020-07-17 18:08:56,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-17 18:08:56,082 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:56,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:56,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1409048217, now seen corresponding path program 11 times [2020-07-17 18:08:56,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:56,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441748804] [2020-07-17 18:08:56,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:56,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:56,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441748804] [2020-07-17 18:08:56,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:56,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-17 18:08:56,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505406028] [2020-07-17 18:08:56,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-17 18:08:56,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:56,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-17 18:08:56,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-07-17 18:08:56,529 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 27 states. [2020-07-17 18:08:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:57,197 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2020-07-17 18:08:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-17 18:08:57,198 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 116 [2020-07-17 18:08:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:57,199 INFO L225 Difference]: With dead ends: 136 [2020-07-17 18:08:57,199 INFO L226 Difference]: Without dead ends: 129 [2020-07-17 18:08:57,200 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 [2020-07-17 18:08:57,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-07-17 18:08:57,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2020-07-17 18:08:57,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-07-17 18:08:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2020-07-17 18:08:57,217 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 116 [2020-07-17 18:08:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:57,217 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2020-07-17 18:08:57,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-17 18:08:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2020-07-17 18:08:57,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-07-17 18:08:57,218 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:57,219 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] [2020-07-17 18:08:57,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-17 18:08:57,219 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:57,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:57,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1865460800, now seen corresponding path program 12 times [2020-07-17 18:08:57,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:57,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258976065] [2020-07-17 18:08:57,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 12 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:57,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258976065] [2020-07-17 18:08:57,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:57,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-17 18:08:57,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719687016] [2020-07-17 18:08:57,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-17 18:08:57,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:57,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-17 18:08:57,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-07-17 18:08:57,403 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 16 states. [2020-07-17 18:08:57,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:57,668 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-07-17 18:08:57,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-17 18:08:57,669 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 123 [2020-07-17 18:08:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:57,670 INFO L225 Difference]: With dead ends: 158 [2020-07-17 18:08:57,670 INFO L226 Difference]: Without dead ends: 142 [2020-07-17 18:08:57,671 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 [2020-07-17 18:08:57,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-07-17 18:08:57,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 132. [2020-07-17 18:08:57,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-17 18:08:57,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2020-07-17 18:08:57,691 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 123 [2020-07-17 18:08:57,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:57,692 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2020-07-17 18:08:57,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-17 18:08:57,692 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2020-07-17 18:08:57,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-07-17 18:08:57,693 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:57,694 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] [2020-07-17 18:08:57,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-17 18:08:57,694 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:57,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:57,695 INFO L82 PathProgramCache]: Analyzing trace with hash 328124995, now seen corresponding path program 12 times [2020-07-17 18:08:57,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:57,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403130987] [2020-07-17 18:08:57,696 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:57,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 654 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:58,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403130987] [2020-07-17 18:08:58,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:58,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-07-17 18:08:58,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647565982] [2020-07-17 18:08:58,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-17 18:08:58,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:58,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-17 18:08:58,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2020-07-17 18:08:58,193 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 29 states. [2020-07-17 18:08:58,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:58,963 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2020-07-17 18:08:58,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-17 18:08:58,968 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 125 [2020-07-17 18:08:58,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:58,969 INFO L225 Difference]: With dead ends: 145 [2020-07-17 18:08:58,969 INFO L226 Difference]: Without dead ends: 138 [2020-07-17 18:08:58,974 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 [2020-07-17 18:08:58,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-17 18:08:58,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2020-07-17 18:08:58,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-07-17 18:08:58,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2020-07-17 18:08:58,992 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 125 [2020-07-17 18:08:58,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:58,993 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2020-07-17 18:08:58,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-17 18:08:58,993 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2020-07-17 18:08:58,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-07-17 18:08:58,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:58,994 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] [2020-07-17 18:08:58,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-07-17 18:08:58,995 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:58,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:58,995 INFO L82 PathProgramCache]: Analyzing trace with hash -2136494762, now seen corresponding path program 13 times [2020-07-17 18:08:58,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:58,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140860849] [2020-07-17 18:08:58,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:59,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,190 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 13 proven. 728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:59,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140860849] [2020-07-17 18:08:59,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:59,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-17 18:08:59,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082126951] [2020-07-17 18:08:59,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 18:08:59,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:59,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 18:08:59,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-07-17 18:08:59,192 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 17 states. [2020-07-17 18:08:59,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:59,471 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2020-07-17 18:08:59,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-17 18:08:59,472 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 132 [2020-07-17 18:08:59,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:59,473 INFO L225 Difference]: With dead ends: 167 [2020-07-17 18:08:59,473 INFO L226 Difference]: Without dead ends: 151 [2020-07-17 18:08:59,474 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 [2020-07-17 18:08:59,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-07-17 18:08:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2020-07-17 18:08:59,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-17 18:08:59,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-07-17 18:08:59,492 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 132 [2020-07-17 18:08:59,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:59,493 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-07-17 18:08:59,493 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 18:08:59,493 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-07-17 18:08:59,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-17 18:08:59,494 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:59,494 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] [2020-07-17 18:08:59,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-07-17 18:08:59,495 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:59,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:59,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1555440167, now seen corresponding path program 13 times [2020-07-17 18:08:59,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:59,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614690232] [2020-07-17 18:08:59,495 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:59,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:00,033 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:00,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614690232] [2020-07-17 18:09:00,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:00,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-07-17 18:09:00,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619590556] [2020-07-17 18:09:00,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-07-17 18:09:00,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:00,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-07-17 18:09:00,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2020-07-17 18:09:00,035 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 31 states. [2020-07-17 18:09:00,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:00,934 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2020-07-17 18:09:00,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-17 18:09:00,935 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 134 [2020-07-17 18:09:00,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:00,936 INFO L225 Difference]: With dead ends: 154 [2020-07-17 18:09:00,937 INFO L226 Difference]: Without dead ends: 147 [2020-07-17 18:09:00,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=192, Invalid=2778, Unknown=0, NotChecked=0, Total=2970 [2020-07-17 18:09:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-17 18:09:00,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2020-07-17 18:09:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-07-17 18:09:00,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-07-17 18:09:00,958 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 134 [2020-07-17 18:09:00,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:00,958 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-07-17 18:09:00,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-07-17 18:09:00,959 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-07-17 18:09:00,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-07-17 18:09:00,960 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:00,960 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] [2020-07-17 18:09:00,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-07-17 18:09:00,961 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:00,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:00,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1825670400, now seen corresponding path program 14 times [2020-07-17 18:09:00,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:00,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703777347] [2020-07-17 18:09:00,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:00,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 14 proven. 847 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:01,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703777347] [2020-07-17 18:09:01,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:01,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-17 18:09:01,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371398753] [2020-07-17 18:09:01,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-17 18:09:01,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:01,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-17 18:09:01,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-07-17 18:09:01,150 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 18 states. [2020-07-17 18:09:01,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:01,466 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2020-07-17 18:09:01,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-17 18:09:01,467 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 141 [2020-07-17 18:09:01,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:01,468 INFO L225 Difference]: With dead ends: 176 [2020-07-17 18:09:01,468 INFO L226 Difference]: Without dead ends: 160 [2020-07-17 18:09:01,471 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 [2020-07-17 18:09:01,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-07-17 18:09:01,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2020-07-17 18:09:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-17 18:09:01,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2020-07-17 18:09:01,494 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 141 [2020-07-17 18:09:01,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:01,494 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2020-07-17 18:09:01,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-17 18:09:01,495 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2020-07-17 18:09:01,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-07-17 18:09:01,496 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:01,496 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] [2020-07-17 18:09:01,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-07-17 18:09:01,496 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:01,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:01,497 INFO L82 PathProgramCache]: Analyzing trace with hash 744256259, now seen corresponding path program 14 times [2020-07-17 18:09:01,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:01,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496012597] [2020-07-17 18:09:01,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:02,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:02,124 INFO L134 CoverageAnalysis]: Checked inductivity of 889 backedges. 0 proven. 889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:02,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496012597] [2020-07-17 18:09:02,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:02,125 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-07-17 18:09:02,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336443145] [2020-07-17 18:09:02,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-17 18:09:02,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:02,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-17 18:09:02,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2020-07-17 18:09:02,127 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 33 states. [2020-07-17 18:09:03,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:03,155 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2020-07-17 18:09:03,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-17 18:09:03,155 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 143 [2020-07-17 18:09:03,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:03,156 INFO L225 Difference]: With dead ends: 163 [2020-07-17 18:09:03,157 INFO L226 Difference]: Without dead ends: 156 [2020-07-17 18:09:03,158 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 [2020-07-17 18:09:03,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-07-17 18:09:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-07-17 18:09:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-07-17 18:09:03,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-07-17 18:09:03,180 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 143 [2020-07-17 18:09:03,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:03,181 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-07-17 18:09:03,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-17 18:09:03,181 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-07-17 18:09:03,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-07-17 18:09:03,182 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:03,182 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] [2020-07-17 18:09:03,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-07-17 18:09:03,182 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:03,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:03,183 INFO L82 PathProgramCache]: Analyzing trace with hash 93236374, now seen corresponding path program 15 times [2020-07-17 18:09:03,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:03,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909098096] [2020-07-17 18:09:03,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:03,386 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 15 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:03,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909098096] [2020-07-17 18:09:03,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:03,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-17 18:09:03,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842113864] [2020-07-17 18:09:03,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 18:09:03,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:03,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 18:09:03,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-07-17 18:09:03,388 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 19 states. [2020-07-17 18:09:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:03,756 INFO L93 Difference]: Finished difference Result 185 states and 189 transitions. [2020-07-17 18:09:03,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-17 18:09:03,756 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 150 [2020-07-17 18:09:03,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:03,758 INFO L225 Difference]: With dead ends: 185 [2020-07-17 18:09:03,758 INFO L226 Difference]: Without dead ends: 169 [2020-07-17 18:09:03,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2020-07-17 18:09:03,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-07-17 18:09:03,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2020-07-17 18:09:03,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-17 18:09:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2020-07-17 18:09:03,785 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 150 [2020-07-17 18:09:03,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:03,786 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2020-07-17 18:09:03,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 18:09:03,786 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2020-07-17 18:09:03,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-07-17 18:09:03,787 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:03,788 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] [2020-07-17 18:09:03,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-07-17 18:09:03,788 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:03,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:03,788 INFO L82 PathProgramCache]: Analyzing trace with hash -1972499175, now seen corresponding path program 15 times [2020-07-17 18:09:03,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:03,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067755517] [2020-07-17 18:09:03,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:04,463 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067755517] [2020-07-17 18:09:04,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:04,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-07-17 18:09:04,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876780201] [2020-07-17 18:09:04,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-17 18:09:04,464 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:04,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-17 18:09:04,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2020-07-17 18:09:04,465 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 35 states. [2020-07-17 18:09:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:05,634 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2020-07-17 18:09:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-07-17 18:09:05,635 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 152 [2020-07-17 18:09:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:05,637 INFO L225 Difference]: With dead ends: 172 [2020-07-17 18:09:05,637 INFO L226 Difference]: Without dead ends: 165 [2020-07-17 18:09:05,643 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=222, Invalid=3684, Unknown=0, NotChecked=0, Total=3906 [2020-07-17 18:09:05,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-17 18:09:05,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-07-17 18:09:05,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-07-17 18:09:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-07-17 18:09:05,684 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 152 [2020-07-17 18:09:05,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:05,685 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-07-17 18:09:05,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-17 18:09:05,685 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-07-17 18:09:05,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-07-17 18:09:05,686 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:05,687 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] [2020-07-17 18:09:05,687 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-07-17 18:09:05,687 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:05,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:05,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1152757184, now seen corresponding path program 16 times [2020-07-17 18:09:05,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:05,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082548021] [2020-07-17 18:09:05,689 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:06,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 16 proven. 1112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:06,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082548021] [2020-07-17 18:09:06,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:06,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-17 18:09:06,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829826561] [2020-07-17 18:09:06,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-17 18:09:06,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:06,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-17 18:09:06,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-07-17 18:09:06,061 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 20 states. [2020-07-17 18:09:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:06,535 INFO L93 Difference]: Finished difference Result 194 states and 198 transitions. [2020-07-17 18:09:06,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-17 18:09:06,536 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 159 [2020-07-17 18:09:06,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:06,538 INFO L225 Difference]: With dead ends: 194 [2020-07-17 18:09:06,538 INFO L226 Difference]: Without dead ends: 178 [2020-07-17 18:09:06,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-07-17 18:09:06,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-17 18:09:06,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2020-07-17 18:09:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-07-17 18:09:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2020-07-17 18:09:06,584 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 159 [2020-07-17 18:09:06,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:06,585 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2020-07-17 18:09:06,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-17 18:09:06,585 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2020-07-17 18:09:06,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-07-17 18:09:06,587 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:06,587 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] [2020-07-17 18:09:06,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-07-17 18:09:06,588 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:06,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:06,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1680249917, now seen corresponding path program 16 times [2020-07-17 18:09:06,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:06,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343137139] [2020-07-17 18:09:06,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:07,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 1160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:07,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343137139] [2020-07-17 18:09:07,468 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:07,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-07-17 18:09:07,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234223463] [2020-07-17 18:09:07,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-17 18:09:07,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:07,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-17 18:09:07,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2020-07-17 18:09:07,470 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 37 states. [2020-07-17 18:09:08,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:08,732 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2020-07-17 18:09:08,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-17 18:09:08,732 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 161 [2020-07-17 18:09:08,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:08,734 INFO L225 Difference]: With dead ends: 181 [2020-07-17 18:09:08,734 INFO L226 Difference]: Without dead ends: 174 [2020-07-17 18:09:08,736 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 [2020-07-17 18:09:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-07-17 18:09:08,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2020-07-17 18:09:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-07-17 18:09:08,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2020-07-17 18:09:08,763 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 161 [2020-07-17 18:09:08,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:08,763 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2020-07-17 18:09:08,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-17 18:09:08,764 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2020-07-17 18:09:08,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-17 18:09:08,765 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:08,765 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] [2020-07-17 18:09:08,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-07-17 18:09:08,765 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:08,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:08,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2129419222, now seen corresponding path program 17 times [2020-07-17 18:09:08,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:08,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171821427] [2020-07-17 18:09:08,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 17 proven. 1258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:09,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171821427] [2020-07-17 18:09:09,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:09,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-17 18:09:09,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624463701] [2020-07-17 18:09:09,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-17 18:09:09,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:09,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-17 18:09:09,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-07-17 18:09:09,026 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 21 states. [2020-07-17 18:09:09,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:09,439 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2020-07-17 18:09:09,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-17 18:09:09,439 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 168 [2020-07-17 18:09:09,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:09,440 INFO L225 Difference]: With dead ends: 203 [2020-07-17 18:09:09,440 INFO L226 Difference]: Without dead ends: 187 [2020-07-17 18:09:09,441 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 [2020-07-17 18:09:09,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-17 18:09:09,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2020-07-17 18:09:09,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-07-17 18:09:09,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2020-07-17 18:09:09,466 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 168 [2020-07-17 18:09:09,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:09,466 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2020-07-17 18:09:09,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-17 18:09:09,466 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2020-07-17 18:09:09,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-07-17 18:09:09,467 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:09,467 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] [2020-07-17 18:09:09,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-07-17 18:09:09,468 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:09,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:09,468 INFO L82 PathProgramCache]: Analyzing trace with hash 589098073, now seen corresponding path program 17 times [2020-07-17 18:09:09,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:09,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121179456] [2020-07-17 18:09:09,469 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:09,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:10,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 0 proven. 1309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:10,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121179456] [2020-07-17 18:09:10,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:10,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-07-17 18:09:10,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810988774] [2020-07-17 18:09:10,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-17 18:09:10,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:10,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-17 18:09:10,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1390, Unknown=0, NotChecked=0, Total=1482 [2020-07-17 18:09:10,272 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 39 states. [2020-07-17 18:09:11,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:11,661 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2020-07-17 18:09:11,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-07-17 18:09:11,661 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 170 [2020-07-17 18:09:11,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:11,663 INFO L225 Difference]: With dead ends: 190 [2020-07-17 18:09:11,663 INFO L226 Difference]: Without dead ends: 183 [2020-07-17 18:09:11,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=252, Invalid=4718, Unknown=0, NotChecked=0, Total=4970 [2020-07-17 18:09:11,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-07-17 18:09:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2020-07-17 18:09:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-07-17 18:09:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2020-07-17 18:09:11,700 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 170 [2020-07-17 18:09:11,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:11,700 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2020-07-17 18:09:11,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-17 18:09:11,700 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2020-07-17 18:09:11,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-07-17 18:09:11,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:11,701 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] [2020-07-17 18:09:11,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-07-17 18:09:11,701 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:11,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:11,702 INFO L82 PathProgramCache]: Analyzing trace with hash 1252599424, now seen corresponding path program 18 times [2020-07-17 18:09:11,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:11,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954142296] [2020-07-17 18:09:11,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:11,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:11,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:11,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 18 proven. 1413 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:11,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954142296] [2020-07-17 18:09:12,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:12,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-17 18:09:12,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629008961] [2020-07-17 18:09:12,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-17 18:09:12,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:12,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-17 18:09:12,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-07-17 18:09:12,004 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 22 states. [2020-07-17 18:09:12,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:12,449 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2020-07-17 18:09:12,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-17 18:09:12,449 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 177 [2020-07-17 18:09:12,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:12,451 INFO L225 Difference]: With dead ends: 212 [2020-07-17 18:09:12,451 INFO L226 Difference]: Without dead ends: 196 [2020-07-17 18:09:12,452 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 [2020-07-17 18:09:12,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-07-17 18:09:12,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 186. [2020-07-17 18:09:12,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-07-17 18:09:12,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2020-07-17 18:09:12,481 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 177 [2020-07-17 18:09:12,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:12,482 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2020-07-17 18:09:12,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-17 18:09:12,482 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2020-07-17 18:09:12,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-07-17 18:09:12,483 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:12,483 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] [2020-07-17 18:09:12,483 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-07-17 18:09:12,483 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:12,484 INFO L82 PathProgramCache]: Analyzing trace with hash -221137789, now seen corresponding path program 18 times [2020-07-17 18:09:12,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:12,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057191058] [2020-07-17 18:09:12,484 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1467 backedges. 0 proven. 1467 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:13,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057191058] [2020-07-17 18:09:13,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:13,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-07-17 18:09:13,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489900948] [2020-07-17 18:09:13,371 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-17 18:09:13,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:13,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-17 18:09:13,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1543, Unknown=0, NotChecked=0, Total=1640 [2020-07-17 18:09:13,372 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 41 states. [2020-07-17 18:09:14,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:14,918 INFO L93 Difference]: Finished difference Result 199 states and 200 transitions. [2020-07-17 18:09:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-07-17 18:09:14,919 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 179 [2020-07-17 18:09:14,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:14,920 INFO L225 Difference]: With dead ends: 199 [2020-07-17 18:09:14,920 INFO L226 Difference]: Without dead ends: 192 [2020-07-17 18:09:14,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=267, Invalid=5283, Unknown=0, NotChecked=0, Total=5550 [2020-07-17 18:09:14,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-07-17 18:09:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2020-07-17 18:09:14,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-17 18:09:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2020-07-17 18:09:14,958 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 179 [2020-07-17 18:09:14,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:14,959 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2020-07-17 18:09:14,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-17 18:09:14,959 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2020-07-17 18:09:14,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-17 18:09:14,960 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:14,960 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] [2020-07-17 18:09:14,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-07-17 18:09:14,960 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:14,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:14,961 INFO L82 PathProgramCache]: Analyzing trace with hash 510966550, now seen corresponding path program 19 times [2020-07-17 18:09:14,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:14,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418824077] [2020-07-17 18:09:14,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:14,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 19 proven. 1577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:15,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418824077] [2020-07-17 18:09:15,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:15,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-17 18:09:15,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378993338] [2020-07-17 18:09:15,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-17 18:09:15,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:15,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-17 18:09:15,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-07-17 18:09:15,276 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 23 states. [2020-07-17 18:09:15,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:15,751 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2020-07-17 18:09:15,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-17 18:09:15,753 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 186 [2020-07-17 18:09:15,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:15,754 INFO L225 Difference]: With dead ends: 221 [2020-07-17 18:09:15,754 INFO L226 Difference]: Without dead ends: 205 [2020-07-17 18:09:15,755 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 [2020-07-17 18:09:15,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-07-17 18:09:15,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 195. [2020-07-17 18:09:15,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-07-17 18:09:15,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2020-07-17 18:09:15,789 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 186 [2020-07-17 18:09:15,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:15,790 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2020-07-17 18:09:15,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-17 18:09:15,790 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2020-07-17 18:09:15,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-07-17 18:09:15,797 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:15,797 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] [2020-07-17 18:09:15,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-07-17 18:09:15,797 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:15,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:15,797 INFO L82 PathProgramCache]: Analyzing trace with hash 34241433, now seen corresponding path program 19 times [2020-07-17 18:09:15,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:15,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916740534] [2020-07-17 18:09:15,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:16,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916740534] [2020-07-17 18:09:16,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:16,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-07-17 18:09:16,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862748438] [2020-07-17 18:09:16,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-17 18:09:16,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:16,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-17 18:09:16,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1704, Unknown=0, NotChecked=0, Total=1806 [2020-07-17 18:09:16,781 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 43 states. [2020-07-17 18:09:18,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:18,513 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2020-07-17 18:09:18,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-07-17 18:09:18,514 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 188 [2020-07-17 18:09:18,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:18,515 INFO L225 Difference]: With dead ends: 208 [2020-07-17 18:09:18,516 INFO L226 Difference]: Without dead ends: 201 [2020-07-17 18:09:18,517 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 [2020-07-17 18:09:18,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-07-17 18:09:18,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-07-17 18:09:18,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-07-17 18:09:18,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2020-07-17 18:09:18,543 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 188 [2020-07-17 18:09:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:18,544 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2020-07-17 18:09:18,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-17 18:09:18,544 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2020-07-17 18:09:18,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-17 18:09:18,545 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:18,545 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] [2020-07-17 18:09:18,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-07-17 18:09:18,545 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:18,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:18,545 INFO L82 PathProgramCache]: Analyzing trace with hash -143134912, now seen corresponding path program 20 times [2020-07-17 18:09:18,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:18,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364736013] [2020-07-17 18:09:18,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:18,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 20 proven. 1750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:18,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364736013] [2020-07-17 18:09:18,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:18,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-07-17 18:09:18,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342350337] [2020-07-17 18:09:18,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-17 18:09:18,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:18,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-17 18:09:18,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-07-17 18:09:18,918 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 24 states. [2020-07-17 18:09:19,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:19,447 INFO L93 Difference]: Finished difference Result 230 states and 234 transitions. [2020-07-17 18:09:19,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-17 18:09:19,447 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 195 [2020-07-17 18:09:19,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:19,450 INFO L225 Difference]: With dead ends: 230 [2020-07-17 18:09:19,450 INFO L226 Difference]: Without dead ends: 214 [2020-07-17 18:09:19,451 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 [2020-07-17 18:09:19,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-07-17 18:09:19,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 204. [2020-07-17 18:09:19,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-07-17 18:09:19,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-07-17 18:09:19,483 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 195 [2020-07-17 18:09:19,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:19,483 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-07-17 18:09:19,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-17 18:09:19,483 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-07-17 18:09:19,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-07-17 18:09:19,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:19,484 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] [2020-07-17 18:09:19,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-07-17 18:09:19,484 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:19,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:19,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1492038333, now seen corresponding path program 20 times [2020-07-17 18:09:19,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:19,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952859182] [2020-07-17 18:09:19,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:19,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1810 backedges. 0 proven. 1810 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:20,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952859182] [2020-07-17 18:09:20,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:20,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-07-17 18:09:20,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500971168] [2020-07-17 18:09:20,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-17 18:09:20,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:20,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-17 18:09:20,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1873, Unknown=0, NotChecked=0, Total=1980 [2020-07-17 18:09:20,545 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 45 states. [2020-07-17 18:09:22,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:22,361 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2020-07-17 18:09:22,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-17 18:09:22,361 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 197 [2020-07-17 18:09:22,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:22,363 INFO L225 Difference]: With dead ends: 217 [2020-07-17 18:09:22,363 INFO L226 Difference]: Without dead ends: 210 [2020-07-17 18:09:22,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=297, Invalid=6509, Unknown=0, NotChecked=0, Total=6806 [2020-07-17 18:09:22,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-07-17 18:09:22,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-07-17 18:09:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-07-17 18:09:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2020-07-17 18:09:22,403 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 197 [2020-07-17 18:09:22,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:22,403 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2020-07-17 18:09:22,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-17 18:09:22,403 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2020-07-17 18:09:22,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-07-17 18:09:22,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:22,405 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] [2020-07-17 18:09:22,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-07-17 18:09:22,405 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:22,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:22,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1864644010, now seen corresponding path program 21 times [2020-07-17 18:09:22,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:22,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718851082] [2020-07-17 18:09:22,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 21 proven. 1932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:22,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718851082] [2020-07-17 18:09:22,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:22,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-17 18:09:22,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197281662] [2020-07-17 18:09:22,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-17 18:09:22,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:22,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-17 18:09:22,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-07-17 18:09:22,802 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 25 states. [2020-07-17 18:09:23,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:23,365 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2020-07-17 18:09:23,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-17 18:09:23,366 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 204 [2020-07-17 18:09:23,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:23,367 INFO L225 Difference]: With dead ends: 239 [2020-07-17 18:09:23,368 INFO L226 Difference]: Without dead ends: 223 [2020-07-17 18:09:23,368 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 [2020-07-17 18:09:23,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-07-17 18:09:23,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 213. [2020-07-17 18:09:23,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-07-17 18:09:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2020-07-17 18:09:23,403 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 204 [2020-07-17 18:09:23,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:23,403 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2020-07-17 18:09:23,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-17 18:09:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2020-07-17 18:09:23,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-07-17 18:09:23,404 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:23,405 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] [2020-07-17 18:09:23,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-07-17 18:09:23,405 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:23,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:23,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1995094745, now seen corresponding path program 21 times [2020-07-17 18:09:23,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:23,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708708260] [2020-07-17 18:09:23,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1995 backedges. 0 proven. 1995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:24,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708708260] [2020-07-17 18:09:24,591 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:24,591 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-07-17 18:09:24,591 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280303278] [2020-07-17 18:09:24,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-17 18:09:24,592 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:24,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-17 18:09:24,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2050, Unknown=0, NotChecked=0, Total=2162 [2020-07-17 18:09:24,592 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand 47 states. [2020-07-17 18:09:26,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:26,618 INFO L93 Difference]: Finished difference Result 226 states and 227 transitions. [2020-07-17 18:09:26,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-07-17 18:09:26,619 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 206 [2020-07-17 18:09:26,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:26,621 INFO L225 Difference]: With dead ends: 226 [2020-07-17 18:09:26,621 INFO L226 Difference]: Without dead ends: 219 [2020-07-17 18:09:26,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=312, Invalid=7170, Unknown=0, NotChecked=0, Total=7482 [2020-07-17 18:09:26,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-07-17 18:09:26,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2020-07-17 18:09:26,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-07-17 18:09:26,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2020-07-17 18:09:26,663 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 206 [2020-07-17 18:09:26,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:26,664 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2020-07-17 18:09:26,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-17 18:09:26,664 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2020-07-17 18:09:26,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-07-17 18:09:26,665 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:26,665 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] [2020-07-17 18:09:26,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-07-17 18:09:26,666 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:26,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:26,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1460795392, now seen corresponding path program 22 times [2020-07-17 18:09:26,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:26,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551007563] [2020-07-17 18:09:26,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:27,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:27,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 22 proven. 2123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:27,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551007563] [2020-07-17 18:09:27,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:27,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-17 18:09:27,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851553314] [2020-07-17 18:09:27,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-17 18:09:27,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:27,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-17 18:09:27,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-07-17 18:09:27,129 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand 26 states. [2020-07-17 18:09:27,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:27,717 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2020-07-17 18:09:27,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-07-17 18:09:27,717 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 213 [2020-07-17 18:09:27,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:27,719 INFO L225 Difference]: With dead ends: 248 [2020-07-17 18:09:27,720 INFO L226 Difference]: Without dead ends: 232 [2020-07-17 18:09:27,720 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 [2020-07-17 18:09:27,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-17 18:09:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 222. [2020-07-17 18:09:27,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-07-17 18:09:27,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2020-07-17 18:09:27,764 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 213 [2020-07-17 18:09:27,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:27,764 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2020-07-17 18:09:27,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-17 18:09:27,764 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2020-07-17 18:09:27,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-07-17 18:09:27,766 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:27,766 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] [2020-07-17 18:09:27,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-07-17 18:09:27,766 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:27,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:27,767 INFO L82 PathProgramCache]: Analyzing trace with hash -748407293, now seen corresponding path program 22 times [2020-07-17 18:09:27,767 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:27,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762807319] [2020-07-17 18:09:27,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:28,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:29,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2189 backedges. 0 proven. 2189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:29,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762807319] [2020-07-17 18:09:29,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:29,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-07-17 18:09:29,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135278461] [2020-07-17 18:09:29,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-17 18:09:29,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:29,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-17 18:09:29,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2235, Unknown=0, NotChecked=0, Total=2352 [2020-07-17 18:09:29,064 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 49 states. [2020-07-17 18:09:31,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:31,302 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2020-07-17 18:09:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-07-17 18:09:31,303 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 215 [2020-07-17 18:09:31,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:31,305 INFO L225 Difference]: With dead ends: 235 [2020-07-17 18:09:31,305 INFO L226 Difference]: Without dead ends: 228 [2020-07-17 18:09:31,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=327, Invalid=7863, Unknown=0, NotChecked=0, Total=8190 [2020-07-17 18:09:31,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-07-17 18:09:31,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2020-07-17 18:09:31,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-07-17 18:09:31,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2020-07-17 18:09:31,351 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 215 [2020-07-17 18:09:31,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:31,352 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2020-07-17 18:09:31,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-17 18:09:31,352 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2020-07-17 18:09:31,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-07-17 18:09:31,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:31,353 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] [2020-07-17 18:09:31,353 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-07-17 18:09:31,353 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:31,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:31,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1037404566, now seen corresponding path program 23 times [2020-07-17 18:09:31,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:31,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631843726] [2020-07-17 18:09:31,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:31,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:31,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 23 proven. 2323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:31,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631843726] [2020-07-17 18:09:31,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:31,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-17 18:09:31,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040273226] [2020-07-17 18:09:31,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-17 18:09:31,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:31,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-17 18:09:31,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-07-17 18:09:31,846 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand 27 states. [2020-07-17 18:09:32,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:32,599 INFO L93 Difference]: Finished difference Result 257 states and 261 transitions. [2020-07-17 18:09:32,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-17 18:09:32,599 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 222 [2020-07-17 18:09:32,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:32,601 INFO L225 Difference]: With dead ends: 257 [2020-07-17 18:09:32,601 INFO L226 Difference]: Without dead ends: 241 [2020-07-17 18:09:32,601 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 [2020-07-17 18:09:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-07-17 18:09:32,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2020-07-17 18:09:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-07-17 18:09:32,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2020-07-17 18:09:32,634 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 222 [2020-07-17 18:09:32,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:32,635 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2020-07-17 18:09:32,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-17 18:09:32,635 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2020-07-17 18:09:32,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-07-17 18:09:32,636 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:32,636 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] [2020-07-17 18:09:32,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-07-17 18:09:32,636 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:32,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:32,636 INFO L82 PathProgramCache]: Analyzing trace with hash -864966119, now seen corresponding path program 23 times [2020-07-17 18:09:32,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:32,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403984277] [2020-07-17 18:09:32,637 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2392 backedges. 0 proven. 2392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:34,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403984277] [2020-07-17 18:09:34,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:34,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-07-17 18:09:34,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250968540] [2020-07-17 18:09:34,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-17 18:09:34,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:34,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-17 18:09:34,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2428, Unknown=0, NotChecked=0, Total=2550 [2020-07-17 18:09:34,169 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 51 states. [2020-07-17 18:09:36,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:36,623 INFO L93 Difference]: Finished difference Result 244 states and 245 transitions. [2020-07-17 18:09:36,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-17 18:09:36,624 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 224 [2020-07-17 18:09:36,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:36,626 INFO L225 Difference]: With dead ends: 244 [2020-07-17 18:09:36,626 INFO L226 Difference]: Without dead ends: 237 [2020-07-17 18:09:36,627 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2338 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=342, Invalid=8588, Unknown=0, NotChecked=0, Total=8930 [2020-07-17 18:09:36,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-07-17 18:09:36,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2020-07-17 18:09:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-07-17 18:09:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2020-07-17 18:09:36,676 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 224 [2020-07-17 18:09:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:36,676 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2020-07-17 18:09:36,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-17 18:09:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2020-07-17 18:09:36,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-07-17 18:09:36,678 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:36,678 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] [2020-07-17 18:09:36,678 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-07-17 18:09:36,678 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:36,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:36,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1641509056, now seen corresponding path program 24 times [2020-07-17 18:09:36,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:36,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11557557] [2020-07-17 18:09:36,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 24 proven. 2532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:37,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11557557] [2020-07-17 18:09:37,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:37,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-07-17 18:09:37,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871047791] [2020-07-17 18:09:37,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-17 18:09:37,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:37,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-17 18:09:37,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-07-17 18:09:37,164 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 28 states. [2020-07-17 18:09:37,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:37,859 INFO L93 Difference]: Finished difference Result 266 states and 270 transitions. [2020-07-17 18:09:37,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-17 18:09:37,860 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 231 [2020-07-17 18:09:37,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:37,862 INFO L225 Difference]: With dead ends: 266 [2020-07-17 18:09:37,862 INFO L226 Difference]: Without dead ends: 250 [2020-07-17 18:09:37,863 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 [2020-07-17 18:09:37,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-17 18:09:37,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 240. [2020-07-17 18:09:37,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-07-17 18:09:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2020-07-17 18:09:37,919 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 231 [2020-07-17 18:09:37,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:37,919 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2020-07-17 18:09:37,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-17 18:09:37,919 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2020-07-17 18:09:37,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-07-17 18:09:37,920 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:37,921 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] [2020-07-17 18:09:37,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-07-17 18:09:37,921 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:37,921 INFO L82 PathProgramCache]: Analyzing trace with hash -141136189, now seen corresponding path program 24 times [2020-07-17 18:09:37,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:37,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988085490] [2020-07-17 18:09:37,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:37,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:39,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:39,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2604 backedges. 0 proven. 2604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:39,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988085490] [2020-07-17 18:09:39,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:39,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-07-17 18:09:39,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147247320] [2020-07-17 18:09:39,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-17 18:09:39,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:39,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-17 18:09:39,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2629, Unknown=0, NotChecked=0, Total=2756 [2020-07-17 18:09:39,456 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand 53 states. [2020-07-17 18:09:42,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:42,075 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2020-07-17 18:09:42,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-07-17 18:09:42,076 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 233 [2020-07-17 18:09:42,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:42,078 INFO L225 Difference]: With dead ends: 253 [2020-07-17 18:09:42,078 INFO L226 Difference]: Without dead ends: 246 [2020-07-17 18:09:42,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=357, Invalid=9345, Unknown=0, NotChecked=0, Total=9702 [2020-07-17 18:09:42,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-07-17 18:09:42,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-07-17 18:09:42,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-07-17 18:09:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2020-07-17 18:09:42,132 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 233 [2020-07-17 18:09:42,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:42,133 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2020-07-17 18:09:42,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-17 18:09:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2020-07-17 18:09:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-07-17 18:09:42,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:42,134 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] [2020-07-17 18:09:42,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-07-17 18:09:42,135 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:42,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:42,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2011825962, now seen corresponding path program 25 times [2020-07-17 18:09:42,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:42,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072860334] [2020-07-17 18:09:42,136 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 25 proven. 2750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:42,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072860334] [2020-07-17 18:09:42,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:42,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-07-17 18:09:42,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851809944] [2020-07-17 18:09:42,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-17 18:09:42,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:42,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-17 18:09:42,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-07-17 18:09:42,660 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 29 states. [2020-07-17 18:09:43,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:43,389 INFO L93 Difference]: Finished difference Result 275 states and 279 transitions. [2020-07-17 18:09:43,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-17 18:09:43,389 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 240 [2020-07-17 18:09:43,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:43,392 INFO L225 Difference]: With dead ends: 275 [2020-07-17 18:09:43,392 INFO L226 Difference]: Without dead ends: 259 [2020-07-17 18:09:43,392 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 [2020-07-17 18:09:43,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-07-17 18:09:43,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 249. [2020-07-17 18:09:43,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-07-17 18:09:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2020-07-17 18:09:43,432 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 240 [2020-07-17 18:09:43,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:43,433 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2020-07-17 18:09:43,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-17 18:09:43,433 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2020-07-17 18:09:43,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-07-17 18:09:43,434 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:43,434 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] [2020-07-17 18:09:43,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-07-17 18:09:43,434 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:43,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:43,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2007807655, now seen corresponding path program 25 times [2020-07-17 18:09:43,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:43,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [869700041] [2020-07-17 18:09:43,435 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2825 backedges. 0 proven. 2825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:45,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [869700041] [2020-07-17 18:09:45,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:45,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-07-17 18:09:45,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700217041] [2020-07-17 18:09:45,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-17 18:09:45,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:45,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-17 18:09:45,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2838, Unknown=0, NotChecked=0, Total=2970 [2020-07-17 18:09:45,192 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand 55 states. [2020-07-17 18:09:48,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:48,019 INFO L93 Difference]: Finished difference Result 262 states and 263 transitions. [2020-07-17 18:09:48,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-07-17 18:09:48,019 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 242 [2020-07-17 18:09:48,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:48,021 INFO L225 Difference]: With dead ends: 262 [2020-07-17 18:09:48,021 INFO L226 Difference]: Without dead ends: 255 [2020-07-17 18:09:48,022 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2790 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=372, Invalid=10134, Unknown=0, NotChecked=0, Total=10506 [2020-07-17 18:09:48,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-07-17 18:09:48,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2020-07-17 18:09:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-07-17 18:09:48,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2020-07-17 18:09:48,068 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 242 [2020-07-17 18:09:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:48,068 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2020-07-17 18:09:48,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-17 18:09:48,069 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2020-07-17 18:09:48,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-07-17 18:09:48,070 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:48,070 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] [2020-07-17 18:09:48,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-07-17 18:09:48,070 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:48,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:48,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1979700864, now seen corresponding path program 26 times [2020-07-17 18:09:48,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:48,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274943163] [2020-07-17 18:09:48,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:48,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 26 proven. 2977 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:48,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274943163] [2020-07-17 18:09:48,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:48,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-07-17 18:09:48,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331964777] [2020-07-17 18:09:48,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-17 18:09:48,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:48,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-17 18:09:48,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-07-17 18:09:48,629 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 30 states. [2020-07-17 18:09:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:49,409 INFO L93 Difference]: Finished difference Result 284 states and 288 transitions. [2020-07-17 18:09:49,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-07-17 18:09:49,416 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 249 [2020-07-17 18:09:49,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:49,417 INFO L225 Difference]: With dead ends: 284 [2020-07-17 18:09:49,418 INFO L226 Difference]: Without dead ends: 268 [2020-07-17 18:09:49,418 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 [2020-07-17 18:09:49,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-07-17 18:09:49,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 258. [2020-07-17 18:09:49,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-07-17 18:09:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2020-07-17 18:09:49,458 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 249 [2020-07-17 18:09:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:49,459 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2020-07-17 18:09:49,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-17 18:09:49,459 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2020-07-17 18:09:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-07-17 18:09:49,460 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:49,460 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] [2020-07-17 18:09:49,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-07-17 18:09:49,461 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:49,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:49,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1200359549, now seen corresponding path program 26 times [2020-07-17 18:09:49,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:49,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167409952] [2020-07-17 18:09:49,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3055 backedges. 0 proven. 3055 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:51,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167409952] [2020-07-17 18:09:51,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:51,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-07-17 18:09:51,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399097703] [2020-07-17 18:09:51,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-07-17 18:09:51,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:51,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-07-17 18:09:51,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=3055, Unknown=0, NotChecked=0, Total=3192 [2020-07-17 18:09:51,315 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 57 states. [2020-07-17 18:09:54,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:54,349 INFO L93 Difference]: Finished difference Result 271 states and 272 transitions. [2020-07-17 18:09:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-07-17 18:09:54,349 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 251 [2020-07-17 18:09:54,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:54,351 INFO L225 Difference]: With dead ends: 271 [2020-07-17 18:09:54,352 INFO L226 Difference]: Without dead ends: 264 [2020-07-17 18:09:54,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3031 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=387, Invalid=10955, Unknown=0, NotChecked=0, Total=11342 [2020-07-17 18:09:54,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-07-17 18:09:54,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 261. [2020-07-17 18:09:54,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-07-17 18:09:54,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2020-07-17 18:09:54,409 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 251 [2020-07-17 18:09:54,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:54,410 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2020-07-17 18:09:54,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-07-17 18:09:54,410 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2020-07-17 18:09:54,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-07-17 18:09:54,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:54,411 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] [2020-07-17 18:09:54,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-07-17 18:09:54,411 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:54,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:54,411 INFO L82 PathProgramCache]: Analyzing trace with hash 223418390, now seen corresponding path program 27 times [2020-07-17 18:09:54,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:54,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046109001] [2020-07-17 18:09:54,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:54,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:56,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:09:56,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046109001] [2020-07-17 18:09:56,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:09:56,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-07-17 18:09:56,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325057178] [2020-07-17 18:09:56,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-07-17 18:09:56,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:56,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-07-17 18:09:56,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=3280, Unknown=0, NotChecked=0, Total=3422 [2020-07-17 18:09:56,385 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand 59 states. [2020-07-17 18:09:59,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:59,659 INFO L93 Difference]: Finished difference Result 280 states and 282 transitions. [2020-07-17 18:09:59,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-07-17 18:09:59,660 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 258 [2020-07-17 18:09:59,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:59,662 INFO L225 Difference]: With dead ends: 280 [2020-07-17 18:09:59,662 INFO L226 Difference]: Without dead ends: 273 [2020-07-17 18:09:59,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=402, Invalid=11808, Unknown=0, NotChecked=0, Total=12210 [2020-07-17 18:09:59,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-07-17 18:09:59,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 270. [2020-07-17 18:09:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-07-17 18:09:59,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 272 transitions. [2020-07-17 18:09:59,709 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 272 transitions. Word has length 258 [2020-07-17 18:09:59,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:59,710 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 272 transitions. [2020-07-17 18:09:59,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-07-17 18:09:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 272 transitions. [2020-07-17 18:09:59,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-07-17 18:09:59,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:59,711 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] [2020-07-17 18:09:59,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-07-17 18:09:59,712 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:59,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:59,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1044595677, now seen corresponding path program 28 times [2020-07-17 18:09:59,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:59,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860256187] [2020-07-17 18:09:59,713 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:09:59,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:09:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 3213 trivial. 0 not checked. [2020-07-17 18:09:59,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860256187] [2020-07-17 18:09:59,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:09:59,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 18:09:59,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811343157] [2020-07-17 18:09:59,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 18:09:59,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:09:59,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 18:09:59,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 18:09:59,801 INFO L87 Difference]: Start difference. First operand 270 states and 272 transitions. Second operand 3 states. [2020-07-17 18:09:59,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:09:59,900 INFO L93 Difference]: Finished difference Result 288 states and 292 transitions. [2020-07-17 18:09:59,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 18:09:59,901 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 265 [2020-07-17 18:09:59,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:09:59,905 INFO L225 Difference]: With dead ends: 288 [2020-07-17 18:09:59,905 INFO L226 Difference]: Without dead ends: 271 [2020-07-17 18:09:59,905 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 [2020-07-17 18:09:59,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-07-17 18:09:59,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2020-07-17 18:09:59,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-07-17 18:09:59,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2020-07-17 18:09:59,982 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 265 [2020-07-17 18:09:59,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:09:59,983 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2020-07-17 18:09:59,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 18:09:59,983 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2020-07-17 18:09:59,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-07-17 18:09:59,985 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:09:59,985 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] [2020-07-17 18:09:59,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-07-17 18:09:59,987 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:09:59,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:09:59,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1372310976, now seen corresponding path program 29 times [2020-07-17 18:09:59,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:09:59,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51213200] [2020-07-17 18:09:59,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:00,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 28 proven. 3458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:10:00,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51213200] [2020-07-17 18:10:00,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:00,648 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-07-17 18:10:00,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523150248] [2020-07-17 18:10:00,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-07-17 18:10:00,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:00,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-07-17 18:10:00,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-07-17 18:10:00,649 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 32 states. [2020-07-17 18:10:01,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:01,591 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2020-07-17 18:10:01,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-07-17 18:10:01,592 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 267 [2020-07-17 18:10:01,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:01,594 INFO L225 Difference]: With dead ends: 295 [2020-07-17 18:10:01,594 INFO L226 Difference]: Without dead ends: 287 [2020-07-17 18:10:01,595 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 [2020-07-17 18:10:01,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-07-17 18:10:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 277. [2020-07-17 18:10:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-07-17 18:10:01,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2020-07-17 18:10:01,653 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 267 [2020-07-17 18:10:01,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:01,654 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2020-07-17 18:10:01,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-07-17 18:10:01,654 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2020-07-17 18:10:01,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-07-17 18:10:01,655 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:01,655 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] [2020-07-17 18:10:01,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-07-17 18:10:01,655 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:01,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:01,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1614229437, now seen corresponding path program 27 times [2020-07-17 18:10:01,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:01,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357934013] [2020-07-17 18:10:01,656 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3542 backedges. 0 proven. 3542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:10:03,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357934013] [2020-07-17 18:10:03,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:03,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-07-17 18:10:03,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178462813] [2020-07-17 18:10:03,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-07-17 18:10:03,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:03,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-07-17 18:10:03,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=3513, Unknown=0, NotChecked=0, Total=3660 [2020-07-17 18:10:03,856 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand 61 states. [2020-07-17 18:10:07,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:07,620 INFO L93 Difference]: Finished difference Result 290 states and 291 transitions. [2020-07-17 18:10:07,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-07-17 18:10:07,620 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 269 [2020-07-17 18:10:07,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:07,622 INFO L225 Difference]: With dead ends: 290 [2020-07-17 18:10:07,623 INFO L226 Difference]: Without dead ends: 283 [2020-07-17 18:10:07,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3543 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=417, Invalid=12693, Unknown=0, NotChecked=0, Total=13110 [2020-07-17 18:10:07,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-07-17 18:10:07,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 280. [2020-07-17 18:10:07,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-07-17 18:10:07,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 281 transitions. [2020-07-17 18:10:07,668 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 281 transitions. Word has length 269 [2020-07-17 18:10:07,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:07,668 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 281 transitions. [2020-07-17 18:10:07,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-07-17 18:10:07,668 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 281 transitions. [2020-07-17 18:10:07,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-07-17 18:10:07,669 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:07,670 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] [2020-07-17 18:10:07,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-07-17 18:10:07,670 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:07,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:07,670 INFO L82 PathProgramCache]: Analyzing trace with hash -432347306, now seen corresponding path program 30 times [2020-07-17 18:10:07,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:07,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661450695] [2020-07-17 18:10:07,670 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:08,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 29 proven. 3712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:10:08,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661450695] [2020-07-17 18:10:08,392 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:08,392 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-07-17 18:10:08,392 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505696422] [2020-07-17 18:10:08,393 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-07-17 18:10:08,393 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:08,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-07-17 18:10:08,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-07-17 18:10:08,394 INFO L87 Difference]: Start difference. First operand 280 states and 281 transitions. Second operand 33 states. [2020-07-17 18:10:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:09,409 INFO L93 Difference]: Finished difference Result 304 states and 306 transitions. [2020-07-17 18:10:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-07-17 18:10:09,410 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 276 [2020-07-17 18:10:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:09,412 INFO L225 Difference]: With dead ends: 304 [2020-07-17 18:10:09,412 INFO L226 Difference]: Without dead ends: 296 [2020-07-17 18:10:09,413 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 [2020-07-17 18:10:09,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-07-17 18:10:09,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 286. [2020-07-17 18:10:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-07-17 18:10:09,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2020-07-17 18:10:09,498 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 276 [2020-07-17 18:10:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:09,498 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2020-07-17 18:10:09,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-07-17 18:10:09,499 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2020-07-17 18:10:09,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-07-17 18:10:09,500 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:09,500 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] [2020-07-17 18:10:09,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-07-17 18:10:09,501 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:09,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:09,501 INFO L82 PathProgramCache]: Analyzing trace with hash -252274727, now seen corresponding path program 28 times [2020-07-17 18:10:09,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:09,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765533925] [2020-07-17 18:10:09,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:11,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3799 backedges. 0 proven. 3799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:10:11,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765533925] [2020-07-17 18:10:11,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:11,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-07-17 18:10:11,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480494520] [2020-07-17 18:10:11,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-07-17 18:10:11,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:11,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-07-17 18:10:11,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=3754, Unknown=0, NotChecked=0, Total=3906 [2020-07-17 18:10:11,796 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand 63 states. [2020-07-17 18:10:15,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:15,614 INFO L93 Difference]: Finished difference Result 299 states and 300 transitions. [2020-07-17 18:10:15,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-07-17 18:10:15,614 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 278 [2020-07-17 18:10:15,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:15,616 INFO L225 Difference]: With dead ends: 299 [2020-07-17 18:10:15,616 INFO L226 Difference]: Without dead ends: 292 [2020-07-17 18:10:15,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3814 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=432, Invalid=13610, Unknown=0, NotChecked=0, Total=14042 [2020-07-17 18:10:15,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-07-17 18:10:15,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2020-07-17 18:10:15,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-07-17 18:10:15,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2020-07-17 18:10:15,669 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 278 [2020-07-17 18:10:15,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:15,670 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2020-07-17 18:10:15,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-07-17 18:10:15,670 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2020-07-17 18:10:15,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-07-17 18:10:15,672 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:15,672 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] [2020-07-17 18:10:15,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-07-17 18:10:15,672 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:15,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:15,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1077906176, now seen corresponding path program 31 times [2020-07-17 18:10:15,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:15,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072052231] [2020-07-17 18:10:15,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 30 proven. 3975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:10:16,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072052231] [2020-07-17 18:10:16,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:16,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-07-17 18:10:16,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573627615] [2020-07-17 18:10:16,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-17 18:10:16,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:16,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-17 18:10:16,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 18:10:16,432 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand 34 states. [2020-07-17 18:10:17,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:17,531 INFO L93 Difference]: Finished difference Result 313 states and 315 transitions. [2020-07-17 18:10:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-07-17 18:10:17,532 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 285 [2020-07-17 18:10:17,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:17,535 INFO L225 Difference]: With dead ends: 313 [2020-07-17 18:10:17,535 INFO L226 Difference]: Without dead ends: 305 [2020-07-17 18:10:17,535 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 [2020-07-17 18:10:17,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-07-17 18:10:17,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 295. [2020-07-17 18:10:17,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-07-17 18:10:17,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2020-07-17 18:10:17,584 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 285 [2020-07-17 18:10:17,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:17,584 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2020-07-17 18:10:17,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-17 18:10:17,584 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2020-07-17 18:10:17,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-07-17 18:10:17,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:17,586 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] [2020-07-17 18:10:17,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-07-17 18:10:17,586 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:17,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:17,586 INFO L82 PathProgramCache]: Analyzing trace with hash -597624573, now seen corresponding path program 29 times [2020-07-17 18:10:17,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:17,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6856441] [2020-07-17 18:10:17,587 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:20,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4065 backedges. 0 proven. 4065 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:10:20,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6856441] [2020-07-17 18:10:20,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:20,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-07-17 18:10:20,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164803268] [2020-07-17 18:10:20,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-07-17 18:10:20,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:20,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-07-17 18:10:20,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=4003, Unknown=0, NotChecked=0, Total=4160 [2020-07-17 18:10:20,068 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 65 states. [2020-07-17 18:10:24,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:24,150 INFO L93 Difference]: Finished difference Result 308 states and 309 transitions. [2020-07-17 18:10:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-07-17 18:10:24,151 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 287 [2020-07-17 18:10:24,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:24,154 INFO L225 Difference]: With dead ends: 308 [2020-07-17 18:10:24,154 INFO L226 Difference]: Without dead ends: 301 [2020-07-17 18:10:24,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=447, Invalid=14559, Unknown=0, NotChecked=0, Total=15006 [2020-07-17 18:10:24,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-07-17 18:10:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 298. [2020-07-17 18:10:24,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-07-17 18:10:24,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2020-07-17 18:10:24,214 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 287 [2020-07-17 18:10:24,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:24,214 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2020-07-17 18:10:24,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-07-17 18:10:24,214 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2020-07-17 18:10:24,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-07-17 18:10:24,216 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:24,216 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] [2020-07-17 18:10:24,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-07-17 18:10:24,216 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:24,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:24,217 INFO L82 PathProgramCache]: Analyzing trace with hash -427333994, now seen corresponding path program 32 times [2020-07-17 18:10:24,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:24,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934431265] [2020-07-17 18:10:24,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:24,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 31 proven. 4247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:10:25,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934431265] [2020-07-17 18:10:25,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:25,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-07-17 18:10:25,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075426368] [2020-07-17 18:10:25,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-07-17 18:10:25,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:25,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-07-17 18:10:25,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-07-17 18:10:25,044 INFO L87 Difference]: Start difference. First operand 298 states and 299 transitions. Second operand 35 states. [2020-07-17 18:10:26,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:26,214 INFO L93 Difference]: Finished difference Result 322 states and 324 transitions. [2020-07-17 18:10:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-07-17 18:10:26,215 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 294 [2020-07-17 18:10:26,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:26,218 INFO L225 Difference]: With dead ends: 322 [2020-07-17 18:10:26,218 INFO L226 Difference]: Without dead ends: 314 [2020-07-17 18:10:26,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-07-17 18:10:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-07-17 18:10:26,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2020-07-17 18:10:26,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-07-17 18:10:26,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 305 transitions. [2020-07-17 18:10:26,271 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 305 transitions. Word has length 294 [2020-07-17 18:10:26,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:26,272 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 305 transitions. [2020-07-17 18:10:26,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-07-17 18:10:26,272 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 305 transitions. [2020-07-17 18:10:26,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-07-17 18:10:26,274 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:26,274 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] [2020-07-17 18:10:26,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-07-17 18:10:26,274 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:26,274 INFO L82 PathProgramCache]: Analyzing trace with hash 270550809, now seen corresponding path program 30 times [2020-07-17 18:10:26,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:26,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222638162] [2020-07-17 18:10:26,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:26,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:28,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4340 backedges. 0 proven. 4340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:10:28,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222638162] [2020-07-17 18:10:28,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:28,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-07-17 18:10:28,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77071742] [2020-07-17 18:10:28,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-07-17 18:10:28,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:28,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-07-17 18:10:28,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=4260, Unknown=0, NotChecked=0, Total=4422 [2020-07-17 18:10:28,950 INFO L87 Difference]: Start difference. First operand 304 states and 305 transitions. Second operand 67 states. [2020-07-17 18:10:33,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:33,385 INFO L93 Difference]: Finished difference Result 317 states and 318 transitions. [2020-07-17 18:10:33,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-07-17 18:10:33,386 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 296 [2020-07-17 18:10:33,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:33,389 INFO L225 Difference]: With dead ends: 317 [2020-07-17 18:10:33,389 INFO L226 Difference]: Without dead ends: 310 [2020-07-17 18:10:33,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4386 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=462, Invalid=15540, Unknown=0, NotChecked=0, Total=16002 [2020-07-17 18:10:33,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-07-17 18:10:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 307. [2020-07-17 18:10:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-07-17 18:10:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2020-07-17 18:10:33,447 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 296 [2020-07-17 18:10:33,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:33,448 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2020-07-17 18:10:33,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-07-17 18:10:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2020-07-17 18:10:33,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-07-17 18:10:33,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:33,450 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] [2020-07-17 18:10:33,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-07-17 18:10:33,450 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:33,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:33,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1458451392, now seen corresponding path program 33 times [2020-07-17 18:10:33,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:33,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940439065] [2020-07-17 18:10:33,451 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:34,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 32 proven. 4528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:10:34,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940439065] [2020-07-17 18:10:34,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:34,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-07-17 18:10:34,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83910337] [2020-07-17 18:10:34,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-07-17 18:10:34,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:34,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-07-17 18:10:34,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-07-17 18:10:34,351 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 36 states. [2020-07-17 18:10:35,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:35,667 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2020-07-17 18:10:35,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-07-17 18:10:35,668 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 303 [2020-07-17 18:10:35,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:35,669 INFO L225 Difference]: With dead ends: 331 [2020-07-17 18:10:35,669 INFO L226 Difference]: Without dead ends: 323 [2020-07-17 18:10:35,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-07-17 18:10:35,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-07-17 18:10:35,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 313. [2020-07-17 18:10:35,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-07-17 18:10:35,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2020-07-17 18:10:35,738 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 303 [2020-07-17 18:10:35,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:35,738 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2020-07-17 18:10:35,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-07-17 18:10:35,739 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2020-07-17 18:10:35,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-07-17 18:10:35,740 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:35,741 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] [2020-07-17 18:10:35,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-07-17 18:10:35,741 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:35,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:35,742 INFO L82 PathProgramCache]: Analyzing trace with hash 34107843, now seen corresponding path program 31 times [2020-07-17 18:10:35,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:35,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [231582906] [2020-07-17 18:10:35,742 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:10:38,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [231582906] [2020-07-17 18:10:38,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:38,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-07-17 18:10:38,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528936536] [2020-07-17 18:10:38,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-07-17 18:10:38,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:38,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-07-17 18:10:38,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=4525, Unknown=0, NotChecked=0, Total=4692 [2020-07-17 18:10:38,635 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand 69 states. [2020-07-17 18:10:43,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:43,344 INFO L93 Difference]: Finished difference Result 326 states and 327 transitions. [2020-07-17 18:10:43,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-07-17 18:10:43,345 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 305 [2020-07-17 18:10:43,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:43,347 INFO L225 Difference]: With dead ends: 326 [2020-07-17 18:10:43,348 INFO L226 Difference]: Without dead ends: 319 [2020-07-17 18:10:43,348 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 [2020-07-17 18:10:43,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-07-17 18:10:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 316. [2020-07-17 18:10:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-07-17 18:10:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 317 transitions. [2020-07-17 18:10:43,408 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 317 transitions. Word has length 305 [2020-07-17 18:10:43,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:43,409 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 317 transitions. [2020-07-17 18:10:43,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-07-17 18:10:43,409 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 317 transitions. [2020-07-17 18:10:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-07-17 18:10:43,411 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:43,411 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] [2020-07-17 18:10:43,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-07-17 18:10:43,411 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:43,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:43,412 INFO L82 PathProgramCache]: Analyzing trace with hash -588605994, now seen corresponding path program 34 times [2020-07-17 18:10:43,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:43,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483061281] [2020-07-17 18:10:43,412 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:44,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 33 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:10:44,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483061281] [2020-07-17 18:10:44,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:44,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-07-17 18:10:44,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913851968] [2020-07-17 18:10:44,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-07-17 18:10:44,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:44,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-07-17 18:10:44,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-07-17 18:10:44,373 INFO L87 Difference]: Start difference. First operand 316 states and 317 transitions. Second operand 37 states. [2020-07-17 18:10:45,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:45,746 INFO L93 Difference]: Finished difference Result 340 states and 342 transitions. [2020-07-17 18:10:45,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-07-17 18:10:45,747 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 312 [2020-07-17 18:10:45,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:45,750 INFO L225 Difference]: With dead ends: 340 [2020-07-17 18:10:45,750 INFO L226 Difference]: Without dead ends: 332 [2020-07-17 18:10:45,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-07-17 18:10:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-07-17 18:10:45,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 322. [2020-07-17 18:10:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-07-17 18:10:45,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 323 transitions. [2020-07-17 18:10:45,812 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 323 transitions. Word has length 312 [2020-07-17 18:10:45,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:45,812 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 323 transitions. [2020-07-17 18:10:45,812 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-07-17 18:10:45,812 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 323 transitions. [2020-07-17 18:10:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-07-17 18:10:45,814 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:45,814 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] [2020-07-17 18:10:45,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-07-17 18:10:45,814 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:45,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:45,815 INFO L82 PathProgramCache]: Analyzing trace with hash -93018535, now seen corresponding path program 32 times [2020-07-17 18:10:45,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:45,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059730731] [2020-07-17 18:10:45,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:45,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4917 backedges. 0 proven. 4917 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:10:48,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059730731] [2020-07-17 18:10:48,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:48,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-07-17 18:10:48,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100477207] [2020-07-17 18:10:48,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-07-17 18:10:48,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:48,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-07-17 18:10:48,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=4798, Unknown=0, NotChecked=0, Total=4970 [2020-07-17 18:10:48,989 INFO L87 Difference]: Start difference. First operand 322 states and 323 transitions. Second operand 71 states. [2020-07-17 18:10:53,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:53,962 INFO L93 Difference]: Finished difference Result 335 states and 336 transitions. [2020-07-17 18:10:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-07-17 18:10:53,963 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 314 [2020-07-17 18:10:53,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:53,965 INFO L225 Difference]: With dead ends: 335 [2020-07-17 18:10:53,966 INFO L226 Difference]: Without dead ends: 328 [2020-07-17 18:10:53,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4998 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=492, Invalid=17598, Unknown=0, NotChecked=0, Total=18090 [2020-07-17 18:10:53,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-07-17 18:10:54,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 325. [2020-07-17 18:10:54,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-07-17 18:10:54,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2020-07-17 18:10:54,028 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 314 [2020-07-17 18:10:54,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:54,028 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2020-07-17 18:10:54,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-07-17 18:10:54,029 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2020-07-17 18:10:54,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-07-17 18:10:54,030 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:54,030 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] [2020-07-17 18:10:54,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-07-17 18:10:54,030 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:54,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:54,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1846291584, now seen corresponding path program 35 times [2020-07-17 18:10:54,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:54,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180263221] [2020-07-17 18:10:54,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:54,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:55,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 34 proven. 5117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:10:55,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180263221] [2020-07-17 18:10:55,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:10:55,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-07-17 18:10:55,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791894135] [2020-07-17 18:10:55,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-07-17 18:10:55,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:10:55,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-07-17 18:10:55,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-07-17 18:10:55,097 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand 38 states. [2020-07-17 18:10:56,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:10:56,605 INFO L93 Difference]: Finished difference Result 349 states and 351 transitions. [2020-07-17 18:10:56,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-07-17 18:10:56,606 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 321 [2020-07-17 18:10:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:10:56,608 INFO L225 Difference]: With dead ends: 349 [2020-07-17 18:10:56,608 INFO L226 Difference]: Without dead ends: 341 [2020-07-17 18:10:56,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-07-17 18:10:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-07-17 18:10:56,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 331. [2020-07-17 18:10:56,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-07-17 18:10:56,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2020-07-17 18:10:56,670 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 321 [2020-07-17 18:10:56,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:10:56,670 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2020-07-17 18:10:56,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-07-17 18:10:56,670 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2020-07-17 18:10:56,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-07-17 18:10:56,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:10:56,672 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] [2020-07-17 18:10:56,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-07-17 18:10:56,672 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:10:56,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:10:56,672 INFO L82 PathProgramCache]: Analyzing trace with hash -913622397, now seen corresponding path program 33 times [2020-07-17 18:10:56,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:10:56,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995520652] [2020-07-17 18:10:56,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:10:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:10:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 5219 backedges. 0 proven. 5219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:11:00,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995520652] [2020-07-17 18:11:00,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:11:00,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-07-17 18:11:00,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347786076] [2020-07-17 18:11:00,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-07-17 18:11:00,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:11:00,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-07-17 18:11:00,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=5079, Unknown=0, NotChecked=0, Total=5256 [2020-07-17 18:11:00,099 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 73 states. [2020-07-17 18:11:05,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:11:05,472 INFO L93 Difference]: Finished difference Result 344 states and 345 transitions. [2020-07-17 18:11:05,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-07-17 18:11:05,473 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 323 [2020-07-17 18:11:05,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:11:05,475 INFO L225 Difference]: With dead ends: 344 [2020-07-17 18:11:05,475 INFO L226 Difference]: Without dead ends: 337 [2020-07-17 18:11:05,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5319 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=507, Invalid=18675, Unknown=0, NotChecked=0, Total=19182 [2020-07-17 18:11:05,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-07-17 18:11:05,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 334. [2020-07-17 18:11:05,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-07-17 18:11:05,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 335 transitions. [2020-07-17 18:11:05,540 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 335 transitions. Word has length 323 [2020-07-17 18:11:05,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:11:05,540 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 335 transitions. [2020-07-17 18:11:05,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-07-17 18:11:05,541 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 335 transitions. [2020-07-17 18:11:05,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-07-17 18:11:05,542 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:11:05,543 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] [2020-07-17 18:11:05,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-07-17 18:11:05,543 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:11:05,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:11:05,543 INFO L82 PathProgramCache]: Analyzing trace with hash -753371882, now seen corresponding path program 36 times [2020-07-17 18:11:05,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:11:05,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413348501] [2020-07-17 18:11:05,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:11:05,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:06,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 35 proven. 5425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:11:06,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413348501] [2020-07-17 18:11:06,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:11:06,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-07-17 18:11:06,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952541495] [2020-07-17 18:11:06,673 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-07-17 18:11:06,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:11:06,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-07-17 18:11:06,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-07-17 18:11:06,674 INFO L87 Difference]: Start difference. First operand 334 states and 335 transitions. Second operand 39 states. [2020-07-17 18:11:08,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:11:08,265 INFO L93 Difference]: Finished difference Result 358 states and 360 transitions. [2020-07-17 18:11:08,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-07-17 18:11:08,267 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 330 [2020-07-17 18:11:08,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:11:08,269 INFO L225 Difference]: With dead ends: 358 [2020-07-17 18:11:08,269 INFO L226 Difference]: Without dead ends: 350 [2020-07-17 18:11:08,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-07-17 18:11:08,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-07-17 18:11:08,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2020-07-17 18:11:08,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-07-17 18:11:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 341 transitions. [2020-07-17 18:11:08,334 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 341 transitions. Word has length 330 [2020-07-17 18:11:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:11:08,335 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 341 transitions. [2020-07-17 18:11:08,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-07-17 18:11:08,335 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 341 transitions. [2020-07-17 18:11:08,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-07-17 18:11:08,336 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:11:08,336 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] [2020-07-17 18:11:08,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-07-17 18:11:08,336 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:11:08,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:11:08,337 INFO L82 PathProgramCache]: Analyzing trace with hash 480753049, now seen corresponding path program 34 times [2020-07-17 18:11:08,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:11:08,337 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915662958] [2020-07-17 18:11:08,337 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:11:08,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5530 backedges. 0 proven. 5530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:11:11,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915662958] [2020-07-17 18:11:11,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:11:11,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-07-17 18:11:11,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325456894] [2020-07-17 18:11:11,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-07-17 18:11:11,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:11:11,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-07-17 18:11:11,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=5368, Unknown=0, NotChecked=0, Total=5550 [2020-07-17 18:11:11,988 INFO L87 Difference]: Start difference. First operand 340 states and 341 transitions. Second operand 75 states. [2020-07-17 18:11:17,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:11:17,663 INFO L93 Difference]: Finished difference Result 353 states and 354 transitions. [2020-07-17 18:11:17,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-07-17 18:11:17,665 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 332 [2020-07-17 18:11:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:11:17,667 INFO L225 Difference]: With dead ends: 353 [2020-07-17 18:11:17,667 INFO L226 Difference]: Without dead ends: 346 [2020-07-17 18:11:17,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5650 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=522, Invalid=19784, Unknown=0, NotChecked=0, Total=20306 [2020-07-17 18:11:17,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-07-17 18:11:17,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 343. [2020-07-17 18:11:17,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-07-17 18:11:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2020-07-17 18:11:17,735 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 332 [2020-07-17 18:11:17,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:11:17,736 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2020-07-17 18:11:17,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-07-17 18:11:17,736 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2020-07-17 18:11:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-07-17 18:11:17,737 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:11:17,737 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] [2020-07-17 18:11:17,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-07-17 18:11:17,737 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:11:17,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:11:17,738 INFO L82 PathProgramCache]: Analyzing trace with hash 644183360, now seen corresponding path program 37 times [2020-07-17 18:11:17,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:11:17,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581417882] [2020-07-17 18:11:17,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:11:17,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:18,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:18,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 36 proven. 5742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:11:18,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581417882] [2020-07-17 18:11:18,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:11:18,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-07-17 18:11:18,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874478424] [2020-07-17 18:11:18,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-07-17 18:11:18,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:11:18,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-07-17 18:11:18,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-07-17 18:11:18,987 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 40 states. [2020-07-17 18:11:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:11:20,755 INFO L93 Difference]: Finished difference Result 367 states and 369 transitions. [2020-07-17 18:11:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-07-17 18:11:20,756 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 339 [2020-07-17 18:11:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:11:20,758 INFO L225 Difference]: With dead ends: 367 [2020-07-17 18:11:20,758 INFO L226 Difference]: Without dead ends: 359 [2020-07-17 18:11:20,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-07-17 18:11:20,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-07-17 18:11:20,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 349. [2020-07-17 18:11:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-07-17 18:11:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 350 transitions. [2020-07-17 18:11:20,828 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 350 transitions. Word has length 339 [2020-07-17 18:11:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:11:20,829 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 350 transitions. [2020-07-17 18:11:20,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-07-17 18:11:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 350 transitions. [2020-07-17 18:11:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-07-17 18:11:20,830 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:11:20,831 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] [2020-07-17 18:11:20,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-07-17 18:11:20,831 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:11:20,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:11:20,831 INFO L82 PathProgramCache]: Analyzing trace with hash -793423037, now seen corresponding path program 35 times [2020-07-17 18:11:20,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:11:20,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032962423] [2020-07-17 18:11:20,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:11:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5850 backedges. 0 proven. 5850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:11:24,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032962423] [2020-07-17 18:11:24,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:11:24,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-07-17 18:11:24,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607255193] [2020-07-17 18:11:24,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-07-17 18:11:24,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:11:24,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-07-17 18:11:24,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=5665, Unknown=0, NotChecked=0, Total=5852 [2020-07-17 18:11:24,914 INFO L87 Difference]: Start difference. First operand 349 states and 350 transitions. Second operand 77 states. [2020-07-17 18:11:31,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:11:31,054 INFO L93 Difference]: Finished difference Result 362 states and 363 transitions. [2020-07-17 18:11:31,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-07-17 18:11:31,056 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 341 [2020-07-17 18:11:31,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:11:31,058 INFO L225 Difference]: With dead ends: 362 [2020-07-17 18:11:31,058 INFO L226 Difference]: Without dead ends: 355 [2020-07-17 18:11:31,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5991 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=537, Invalid=20925, Unknown=0, NotChecked=0, Total=21462 [2020-07-17 18:11:31,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-07-17 18:11:31,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 352. [2020-07-17 18:11:31,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-07-17 18:11:31,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2020-07-17 18:11:31,130 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 341 [2020-07-17 18:11:31,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:11:31,130 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2020-07-17 18:11:31,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-07-17 18:11:31,130 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2020-07-17 18:11:31,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-07-17 18:11:31,132 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:11:31,132 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] [2020-07-17 18:11:31,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-07-17 18:11:31,132 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:11:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:11:31,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1304757334, now seen corresponding path program 38 times [2020-07-17 18:11:31,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:11:31,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640755599] [2020-07-17 18:11:31,133 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:11:31,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 37 proven. 6068 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:11:32,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640755599] [2020-07-17 18:11:32,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:11:32,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-07-17 18:11:32,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354709] [2020-07-17 18:11:32,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-07-17 18:11:32,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:11:32,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-07-17 18:11:32,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-07-17 18:11:32,524 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand 41 states. [2020-07-17 18:11:34,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:11:34,452 INFO L93 Difference]: Finished difference Result 376 states and 378 transitions. [2020-07-17 18:11:34,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-07-17 18:11:34,453 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 348 [2020-07-17 18:11:34,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:11:34,455 INFO L225 Difference]: With dead ends: 376 [2020-07-17 18:11:34,455 INFO L226 Difference]: Without dead ends: 368 [2020-07-17 18:11:34,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-07-17 18:11:34,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-07-17 18:11:34,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 358. [2020-07-17 18:11:34,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-07-17 18:11:34,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 359 transitions. [2020-07-17 18:11:34,527 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 359 transitions. Word has length 348 [2020-07-17 18:11:34,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:11:34,527 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 359 transitions. [2020-07-17 18:11:34,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-07-17 18:11:34,527 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 359 transitions. [2020-07-17 18:11:34,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-07-17 18:11:34,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:11:34,529 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] [2020-07-17 18:11:34,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-07-17 18:11:34,529 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:11:34,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:11:34,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1636993831, now seen corresponding path program 36 times [2020-07-17 18:11:34,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:11:34,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237706281] [2020-07-17 18:11:34,530 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:11:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:38,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 6179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:11:38,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237706281] [2020-07-17 18:11:38,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:11:38,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-07-17 18:11:38,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178752337] [2020-07-17 18:11:38,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-07-17 18:11:38,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:11:38,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-07-17 18:11:38,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5970, Unknown=0, NotChecked=0, Total=6162 [2020-07-17 18:11:38,905 INFO L87 Difference]: Start difference. First operand 358 states and 359 transitions. Second operand 79 states. [2020-07-17 18:11:48,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:11:48,506 INFO L93 Difference]: Finished difference Result 371 states and 372 transitions. [2020-07-17 18:11:48,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-07-17 18:11:48,507 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 350 [2020-07-17 18:11:48,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:11:48,509 INFO L225 Difference]: With dead ends: 371 [2020-07-17 18:11:48,509 INFO L226 Difference]: Without dead ends: 364 [2020-07-17 18:11:48,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6342 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=552, Invalid=22098, Unknown=0, NotChecked=0, Total=22650 [2020-07-17 18:11:48,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-07-17 18:11:48,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 361. [2020-07-17 18:11:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-07-17 18:11:48,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 362 transitions. [2020-07-17 18:11:48,585 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 362 transitions. Word has length 350 [2020-07-17 18:11:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:11:48,586 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 362 transitions. [2020-07-17 18:11:48,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-07-17 18:11:48,586 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 362 transitions. [2020-07-17 18:11:48,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-07-17 18:11:48,587 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:11:48,587 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] [2020-07-17 18:11:48,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-07-17 18:11:48,588 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:11:48,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:11:48,588 INFO L82 PathProgramCache]: Analyzing trace with hash 96865792, now seen corresponding path program 39 times [2020-07-17 18:11:48,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:11:48,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922907799] [2020-07-17 18:11:48,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:11:48,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 38 proven. 6403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:11:50,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922907799] [2020-07-17 18:11:50,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:11:50,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-07-17 18:11:50,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666376625] [2020-07-17 18:11:50,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-07-17 18:11:50,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:11:50,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-07-17 18:11:50,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-07-17 18:11:50,072 INFO L87 Difference]: Start difference. First operand 361 states and 362 transitions. Second operand 42 states. [2020-07-17 18:11:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:11:52,203 INFO L93 Difference]: Finished difference Result 385 states and 387 transitions. [2020-07-17 18:11:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-07-17 18:11:52,205 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 357 [2020-07-17 18:11:52,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:11:52,207 INFO L225 Difference]: With dead ends: 385 [2020-07-17 18:11:52,207 INFO L226 Difference]: Without dead ends: 377 [2020-07-17 18:11:52,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-07-17 18:11:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-07-17 18:11:52,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 367. [2020-07-17 18:11:52,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-07-17 18:11:52,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 368 transitions. [2020-07-17 18:11:52,289 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 368 transitions. Word has length 357 [2020-07-17 18:11:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:11:52,289 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 368 transitions. [2020-07-17 18:11:52,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-07-17 18:11:52,289 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 368 transitions. [2020-07-17 18:11:52,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-07-17 18:11:52,291 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:11:52,291 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] [2020-07-17 18:11:52,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-07-17 18:11:52,292 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:11:52,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:11:52,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1515371523, now seen corresponding path program 37 times [2020-07-17 18:11:52,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:11:52,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936409157] [2020-07-17 18:11:52,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:11:52,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:11:57,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6517 backedges. 0 proven. 6517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:11:57,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936409157] [2020-07-17 18:11:57,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:11:57,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-07-17 18:11:57,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180906974] [2020-07-17 18:11:57,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-07-17 18:11:57,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:11:57,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-07-17 18:11:57,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=6283, Unknown=0, NotChecked=0, Total=6480 [2020-07-17 18:11:57,231 INFO L87 Difference]: Start difference. First operand 367 states and 368 transitions. Second operand 81 states. [2020-07-17 18:12:05,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:12:05,010 INFO L93 Difference]: Finished difference Result 380 states and 381 transitions. [2020-07-17 18:12:05,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-07-17 18:12:05,011 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 359 [2020-07-17 18:12:05,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:12:05,014 INFO L225 Difference]: With dead ends: 380 [2020-07-17 18:12:05,014 INFO L226 Difference]: Without dead ends: 373 [2020-07-17 18:12:05,015 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6703 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=567, Invalid=23303, Unknown=0, NotChecked=0, Total=23870 [2020-07-17 18:12:05,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-07-17 18:12:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 370. [2020-07-17 18:12:05,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-07-17 18:12:05,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 371 transitions. [2020-07-17 18:12:05,115 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 371 transitions. Word has length 359 [2020-07-17 18:12:05,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:12:05,115 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 371 transitions. [2020-07-17 18:12:05,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-07-17 18:12:05,116 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 371 transitions. [2020-07-17 18:12:05,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-07-17 18:12:05,117 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:12:05,117 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] [2020-07-17 18:12:05,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-07-17 18:12:05,117 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:12:05,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:12:05,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1935391850, now seen corresponding path program 40 times [2020-07-17 18:12:05,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:12:05,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177488612] [2020-07-17 18:12:05,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:12:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:06,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 39 proven. 6747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:12:06,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177488612] [2020-07-17 18:12:06,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:12:06,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-07-17 18:12:06,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525161689] [2020-07-17 18:12:06,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-07-17 18:12:06,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:12:06,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-07-17 18:12:06,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-07-17 18:12:06,794 INFO L87 Difference]: Start difference. First operand 370 states and 371 transitions. Second operand 43 states. [2020-07-17 18:12:09,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:12:09,169 INFO L93 Difference]: Finished difference Result 394 states and 396 transitions. [2020-07-17 18:12:09,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-07-17 18:12:09,171 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 366 [2020-07-17 18:12:09,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:12:09,173 INFO L225 Difference]: With dead ends: 394 [2020-07-17 18:12:09,173 INFO L226 Difference]: Without dead ends: 386 [2020-07-17 18:12:09,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2020-07-17 18:12:09,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-07-17 18:12:09,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2020-07-17 18:12:09,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-07-17 18:12:09,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 377 transitions. [2020-07-17 18:12:09,266 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 377 transitions. Word has length 366 [2020-07-17 18:12:09,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:12:09,266 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 377 transitions. [2020-07-17 18:12:09,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-07-17 18:12:09,267 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 377 transitions. [2020-07-17 18:12:09,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-07-17 18:12:09,269 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:12:09,269 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] [2020-07-17 18:12:09,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-07-17 18:12:09,269 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:12:09,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:12:09,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1569070055, now seen corresponding path program 38 times [2020-07-17 18:12:09,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:12:09,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1005994990] [2020-07-17 18:12:09,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:12:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6864 backedges. 0 proven. 6864 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:12:14,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1005994990] [2020-07-17 18:12:14,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:12:14,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-07-17 18:12:14,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575398011] [2020-07-17 18:12:14,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-07-17 18:12:14,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:12:14,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-07-17 18:12:14,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=6604, Unknown=0, NotChecked=0, Total=6806 [2020-07-17 18:12:14,718 INFO L87 Difference]: Start difference. First operand 376 states and 377 transitions. Second operand 83 states. [2020-07-17 18:12:23,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:12:23,529 INFO L93 Difference]: Finished difference Result 389 states and 390 transitions. [2020-07-17 18:12:23,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-07-17 18:12:23,531 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 368 [2020-07-17 18:12:23,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:12:23,534 INFO L225 Difference]: With dead ends: 389 [2020-07-17 18:12:23,534 INFO L226 Difference]: Without dead ends: 382 [2020-07-17 18:12:23,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7074 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=582, Invalid=24540, Unknown=0, NotChecked=0, Total=25122 [2020-07-17 18:12:23,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-07-17 18:12:23,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 379. [2020-07-17 18:12:23,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-07-17 18:12:23,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 380 transitions. [2020-07-17 18:12:23,639 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 380 transitions. Word has length 368 [2020-07-17 18:12:23,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:12:23,639 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 380 transitions. [2020-07-17 18:12:23,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-07-17 18:12:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 380 transitions. [2020-07-17 18:12:23,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-07-17 18:12:23,641 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:12:23,642 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] [2020-07-17 18:12:23,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-07-17 18:12:23,642 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:12:23,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:12:23,643 INFO L82 PathProgramCache]: Analyzing trace with hash 922351296, now seen corresponding path program 41 times [2020-07-17 18:12:23,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:12:23,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052178562] [2020-07-17 18:12:23,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:12:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 40 proven. 7100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:12:25,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052178562] [2020-07-17 18:12:25,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:12:25,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-07-17 18:12:25,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462517561] [2020-07-17 18:12:25,609 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-07-17 18:12:25,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:12:25,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-07-17 18:12:25,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-07-17 18:12:25,610 INFO L87 Difference]: Start difference. First operand 379 states and 380 transitions. Second operand 44 states. [2020-07-17 18:12:28,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:12:28,245 INFO L93 Difference]: Finished difference Result 403 states and 405 transitions. [2020-07-17 18:12:28,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-07-17 18:12:28,247 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 375 [2020-07-17 18:12:28,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:12:28,250 INFO L225 Difference]: With dead ends: 403 [2020-07-17 18:12:28,250 INFO L226 Difference]: Without dead ends: 395 [2020-07-17 18:12:28,251 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-07-17 18:12:28,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-07-17 18:12:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 385. [2020-07-17 18:12:28,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-07-17 18:12:28,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 386 transitions. [2020-07-17 18:12:28,352 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 386 transitions. Word has length 375 [2020-07-17 18:12:28,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:12:28,353 INFO L479 AbstractCegarLoop]: Abstraction has 385 states and 386 transitions. [2020-07-17 18:12:28,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-07-17 18:12:28,353 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 386 transitions. [2020-07-17 18:12:28,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-07-17 18:12:28,355 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:12:28,356 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] [2020-07-17 18:12:28,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-07-17 18:12:28,356 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:12:28,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:12:28,356 INFO L82 PathProgramCache]: Analyzing trace with hash 237991107, now seen corresponding path program 39 times [2020-07-17 18:12:28,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:12:28,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882208984] [2020-07-17 18:12:28,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:12:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7220 backedges. 0 proven. 7220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:12:34,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882208984] [2020-07-17 18:12:34,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:12:34,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-07-17 18:12:34,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754242410] [2020-07-17 18:12:34,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-07-17 18:12:34,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:12:34,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-07-17 18:12:34,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=6933, Unknown=0, NotChecked=0, Total=7140 [2020-07-17 18:12:34,366 INFO L87 Difference]: Start difference. First operand 385 states and 386 transitions. Second operand 85 states. [2020-07-17 18:12:48,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:12:48,566 INFO L93 Difference]: Finished difference Result 398 states and 399 transitions. [2020-07-17 18:12:48,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-07-17 18:12:48,568 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 377 [2020-07-17 18:12:48,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:12:48,570 INFO L225 Difference]: With dead ends: 398 [2020-07-17 18:12:48,570 INFO L226 Difference]: Without dead ends: 391 [2020-07-17 18:12:48,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7455 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=597, Invalid=25809, Unknown=0, NotChecked=0, Total=26406 [2020-07-17 18:12:48,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-07-17 18:12:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 388. [2020-07-17 18:12:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-07-17 18:12:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 389 transitions. [2020-07-17 18:12:48,669 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 389 transitions. Word has length 377 [2020-07-17 18:12:48,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:12:48,669 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 389 transitions. [2020-07-17 18:12:48,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-07-17 18:12:48,670 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 389 transitions. [2020-07-17 18:12:48,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2020-07-17 18:12:48,671 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:12:48,671 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] [2020-07-17 18:12:48,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-07-17 18:12:48,672 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:12:48,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:12:48,672 INFO L82 PathProgramCache]: Analyzing trace with hash -899009834, now seen corresponding path program 42 times [2020-07-17 18:12:48,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:12:48,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442695168] [2020-07-17 18:12:48,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:12:48,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:50,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:12:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 41 proven. 7462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:12:50,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442695168] [2020-07-17 18:12:50,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:12:50,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-07-17 18:12:50,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407927631] [2020-07-17 18:12:50,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-17 18:12:50,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:12:50,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-17 18:12:50,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-07-17 18:12:50,839 INFO L87 Difference]: Start difference. First operand 388 states and 389 transitions. Second operand 45 states. [2020-07-17 18:12:53,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:12:53,808 INFO L93 Difference]: Finished difference Result 412 states and 414 transitions. [2020-07-17 18:12:53,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-07-17 18:12:53,810 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 384 [2020-07-17 18:12:53,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:12:53,813 INFO L225 Difference]: With dead ends: 412 [2020-07-17 18:12:53,813 INFO L226 Difference]: Without dead ends: 404 [2020-07-17 18:12:53,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-07-17 18:12:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-07-17 18:12:53,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 394. [2020-07-17 18:12:53,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-07-17 18:12:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 395 transitions. [2020-07-17 18:12:53,919 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 395 transitions. Word has length 384 [2020-07-17 18:12:53,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:12:53,919 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 395 transitions. [2020-07-17 18:12:53,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-17 18:12:53,919 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 395 transitions. [2020-07-17 18:12:53,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-07-17 18:12:53,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:12:53,922 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] [2020-07-17 18:12:53,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-07-17 18:12:53,922 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:12:53,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:12:53,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2038365351, now seen corresponding path program 40 times [2020-07-17 18:12:53,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:12:53,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184882010] [2020-07-17 18:12:53,923 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:12:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7585 backedges. 0 proven. 7585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:13:00,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184882010] [2020-07-17 18:13:00,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:13:00,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-07-17 18:13:00,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997857002] [2020-07-17 18:13:00,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-07-17 18:13:00,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:13:00,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-07-17 18:13:00,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=7270, Unknown=0, NotChecked=0, Total=7482 [2020-07-17 18:13:00,883 INFO L87 Difference]: Start difference. First operand 394 states and 395 transitions. Second operand 87 states. [2020-07-17 18:13:17,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:13:17,140 INFO L93 Difference]: Finished difference Result 407 states and 408 transitions. [2020-07-17 18:13:17,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-07-17 18:13:17,142 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 386 [2020-07-17 18:13:17,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:13:17,144 INFO L225 Difference]: With dead ends: 407 [2020-07-17 18:13:17,144 INFO L226 Difference]: Without dead ends: 400 [2020-07-17 18:13:17,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7846 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=612, Invalid=27110, Unknown=0, NotChecked=0, Total=27722 [2020-07-17 18:13:17,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-07-17 18:13:17,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 397. [2020-07-17 18:13:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-07-17 18:13:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 398 transitions. [2020-07-17 18:13:17,267 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 398 transitions. Word has length 386 [2020-07-17 18:13:17,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:13:17,268 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 398 transitions. [2020-07-17 18:13:17,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-07-17 18:13:17,268 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 398 transitions. [2020-07-17 18:13:17,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-07-17 18:13:17,270 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:13:17,271 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] [2020-07-17 18:13:17,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-07-17 18:13:17,271 INFO L427 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:13:17,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:13:17,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1238183808, now seen corresponding path program 43 times [2020-07-17 18:13:17,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:13:17,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819308534] [2020-07-17 18:13:17,272 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:13:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:19,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 7875 backedges. 42 proven. 7833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:13:19,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819308534] [2020-07-17 18:13:19,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:13:19,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-07-17 18:13:19,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821621233] [2020-07-17 18:13:19,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-07-17 18:13:19,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:13:19,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-07-17 18:13:19,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-07-17 18:13:19,797 INFO L87 Difference]: Start difference. First operand 397 states and 398 transitions. Second operand 46 states. [2020-07-17 18:13:23,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:13:23,236 INFO L93 Difference]: Finished difference Result 421 states and 423 transitions. [2020-07-17 18:13:23,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-07-17 18:13:23,239 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 393 [2020-07-17 18:13:23,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:13:23,242 INFO L225 Difference]: With dead ends: 421 [2020-07-17 18:13:23,242 INFO L226 Difference]: Without dead ends: 413 [2020-07-17 18:13:23,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-07-17 18:13:23,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-07-17 18:13:23,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 403. [2020-07-17 18:13:23,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-07-17 18:13:23,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2020-07-17 18:13:23,353 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 393 [2020-07-17 18:13:23,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:13:23,353 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2020-07-17 18:13:23,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-07-17 18:13:23,353 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2020-07-17 18:13:23,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-07-17 18:13:23,355 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:13:23,355 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] [2020-07-17 18:13:23,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-07-17 18:13:23,356 INFO L427 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:13:23,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:13:23,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1189642877, now seen corresponding path program 41 times [2020-07-17 18:13:23,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:13:23,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627799469] [2020-07-17 18:13:23,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:13:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7959 backedges. 0 proven. 7959 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:13:31,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627799469] [2020-07-17 18:13:31,239 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:13:31,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-07-17 18:13:31,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185697553] [2020-07-17 18:13:31,240 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-07-17 18:13:31,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:13:31,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-07-17 18:13:31,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=7615, Unknown=0, NotChecked=0, Total=7832 [2020-07-17 18:13:31,241 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 89 states. [2020-07-17 18:13:44,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:13:44,651 INFO L93 Difference]: Finished difference Result 416 states and 417 transitions. [2020-07-17 18:13:44,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-07-17 18:13:44,654 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 395 [2020-07-17 18:13:44,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:13:44,656 INFO L225 Difference]: With dead ends: 416 [2020-07-17 18:13:44,657 INFO L226 Difference]: Without dead ends: 409 [2020-07-17 18:13:44,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8247 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=627, Invalid=28443, Unknown=0, NotChecked=0, Total=29070 [2020-07-17 18:13:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-07-17 18:13:44,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 406. [2020-07-17 18:13:44,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-07-17 18:13:44,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 407 transitions. [2020-07-17 18:13:44,753 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 407 transitions. Word has length 395 [2020-07-17 18:13:44,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:13:44,753 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 407 transitions. [2020-07-17 18:13:44,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-07-17 18:13:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 407 transitions. [2020-07-17 18:13:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-07-17 18:13:44,755 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:13:44,755 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] [2020-07-17 18:13:44,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-07-17 18:13:44,755 INFO L427 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:13:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:13:44,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2093666838, now seen corresponding path program 44 times [2020-07-17 18:13:44,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:13:44,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [515953537] [2020-07-17 18:13:44,756 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:13:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:47,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:13:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 43 proven. 8213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:13:47,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [515953537] [2020-07-17 18:13:47,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:13:47,497 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-07-17 18:13:47,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150909886] [2020-07-17 18:13:47,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-07-17 18:13:47,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:13:47,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-07-17 18:13:47,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-07-17 18:13:47,498 INFO L87 Difference]: Start difference. First operand 406 states and 407 transitions. Second operand 47 states. [2020-07-17 18:13:51,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:13:51,331 INFO L93 Difference]: Finished difference Result 430 states and 432 transitions. [2020-07-17 18:13:51,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-07-17 18:13:51,334 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 402 [2020-07-17 18:13:51,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:13:51,336 INFO L225 Difference]: With dead ends: 430 [2020-07-17 18:13:51,336 INFO L226 Difference]: Without dead ends: 422 [2020-07-17 18:13:51,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-07-17 18:13:51,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-07-17 18:13:51,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2020-07-17 18:13:51,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-07-17 18:13:51,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 413 transitions. [2020-07-17 18:13:51,433 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 413 transitions. Word has length 402 [2020-07-17 18:13:51,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:13:51,433 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 413 transitions. [2020-07-17 18:13:51,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-07-17 18:13:51,433 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 413 transitions. [2020-07-17 18:13:51,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2020-07-17 18:13:51,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:13:51,435 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] [2020-07-17 18:13:51,435 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-07-17 18:13:51,435 INFO L427 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:13:51,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:13:51,436 INFO L82 PathProgramCache]: Analyzing trace with hash 590795417, now seen corresponding path program 42 times [2020-07-17 18:13:51,436 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:13:51,436 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100679423] [2020-07-17 18:13:51,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:13:51,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8342 backedges. 0 proven. 8342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:14:00,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100679423] [2020-07-17 18:14:00,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:14:00,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2020-07-17 18:14:00,272 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005280625] [2020-07-17 18:14:00,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-07-17 18:14:00,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:14:00,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-07-17 18:14:00,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=7968, Unknown=0, NotChecked=0, Total=8190 [2020-07-17 18:14:00,273 INFO L87 Difference]: Start difference. First operand 412 states and 413 transitions. Second operand 91 states. [2020-07-17 18:14:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:14:15,631 INFO L93 Difference]: Finished difference Result 425 states and 426 transitions. [2020-07-17 18:14:15,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-07-17 18:14:15,634 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 404 [2020-07-17 18:14:15,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:14:15,637 INFO L225 Difference]: With dead ends: 425 [2020-07-17 18:14:15,637 INFO L226 Difference]: Without dead ends: 418 [2020-07-17 18:14:15,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8658 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=642, Invalid=29808, Unknown=0, NotChecked=0, Total=30450 [2020-07-17 18:14:15,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-07-17 18:14:15,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 415. [2020-07-17 18:14:15,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-07-17 18:14:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 416 transitions. [2020-07-17 18:14:15,737 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 416 transitions. Word has length 404 [2020-07-17 18:14:15,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:14:15,738 INFO L479 AbstractCegarLoop]: Abstraction has 415 states and 416 transitions. [2020-07-17 18:14:15,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-07-17 18:14:15,738 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 416 transitions. [2020-07-17 18:14:15,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-07-17 18:14:15,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:14:15,740 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] [2020-07-17 18:14:15,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-07-17 18:14:15,740 INFO L427 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:14:15,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:14:15,740 INFO L82 PathProgramCache]: Analyzing trace with hash -217335744, now seen corresponding path program 45 times [2020-07-17 18:14:15,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:14:15,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972715995] [2020-07-17 18:14:15,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:14:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8646 backedges. 44 proven. 8602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:14:18,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972715995] [2020-07-17 18:14:18,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:14:18,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-07-17 18:14:18,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463427418] [2020-07-17 18:14:18,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-07-17 18:14:18,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:14:18,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-07-17 18:14:18,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-07-17 18:14:18,789 INFO L87 Difference]: Start difference. First operand 415 states and 416 transitions. Second operand 48 states. [2020-07-17 18:14:23,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:14:23,117 INFO L93 Difference]: Finished difference Result 439 states and 441 transitions. [2020-07-17 18:14:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-07-17 18:14:23,119 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 411 [2020-07-17 18:14:23,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:14:23,122 INFO L225 Difference]: With dead ends: 439 [2020-07-17 18:14:23,122 INFO L226 Difference]: Without dead ends: 431 [2020-07-17 18:14:23,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-07-17 18:14:23,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-07-17 18:14:23,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 421. [2020-07-17 18:14:23,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-07-17 18:14:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 422 transitions. [2020-07-17 18:14:23,224 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 422 transitions. Word has length 411 [2020-07-17 18:14:23,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:14:23,225 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 422 transitions. [2020-07-17 18:14:23,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-07-17 18:14:23,225 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 422 transitions. [2020-07-17 18:14:23,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-07-17 18:14:23,227 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:14:23,227 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] [2020-07-17 18:14:23,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-07-17 18:14:23,227 INFO L427 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:14:23,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:14:23,227 INFO L82 PathProgramCache]: Analyzing trace with hash 215406147, now seen corresponding path program 43 times [2020-07-17 18:14:23,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:14:23,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145815168] [2020-07-17 18:14:23,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:14:23,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:14:32,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8734 backedges. 0 proven. 8734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:14:32,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145815168] [2020-07-17 18:14:32,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:14:32,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-07-17 18:14:32,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364624812] [2020-07-17 18:14:32,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-07-17 18:14:32,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:14:32,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-07-17 18:14:32,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=8329, Unknown=0, NotChecked=0, Total=8556 [2020-07-17 18:14:32,979 INFO L87 Difference]: Start difference. First operand 421 states and 422 transitions. Second operand 93 states. [2020-07-17 18:14:58,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:14:58,197 INFO L93 Difference]: Finished difference Result 434 states and 435 transitions. [2020-07-17 18:14:58,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-07-17 18:14:58,200 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 413 [2020-07-17 18:14:58,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:14:58,202 INFO L225 Difference]: With dead ends: 434 [2020-07-17 18:14:58,202 INFO L226 Difference]: Without dead ends: 427 [2020-07-17 18:14:58,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9079 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=657, Invalid=31205, Unknown=0, NotChecked=0, Total=31862 [2020-07-17 18:14:58,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-07-17 18:14:58,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 424. [2020-07-17 18:14:58,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-07-17 18:14:58,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 425 transitions. [2020-07-17 18:14:58,309 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 425 transitions. Word has length 413 [2020-07-17 18:14:58,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:14:58,309 INFO L479 AbstractCegarLoop]: Abstraction has 424 states and 425 transitions. [2020-07-17 18:14:58,309 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-07-17 18:14:58,309 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 425 transitions. [2020-07-17 18:14:58,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-07-17 18:14:58,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:14:58,311 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] [2020-07-17 18:14:58,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2020-07-17 18:14:58,311 INFO L427 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:14:58,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:14:58,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1803935402, now seen corresponding path program 46 times [2020-07-17 18:14:58,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:14:58,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702646859] [2020-07-17 18:14:58,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:14:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 45 proven. 9000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:15:01,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702646859] [2020-07-17 18:15:01,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:15:01,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-07-17 18:15:01,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401941290] [2020-07-17 18:15:01,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-07-17 18:15:01,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:15:01,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-07-17 18:15:01,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-07-17 18:15:01,754 INFO L87 Difference]: Start difference. First operand 424 states and 425 transitions. Second operand 49 states. [2020-07-17 18:15:07,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:15:07,323 INFO L93 Difference]: Finished difference Result 448 states and 450 transitions. [2020-07-17 18:15:07,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-07-17 18:15:07,326 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 420 [2020-07-17 18:15:07,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:15:07,329 INFO L225 Difference]: With dead ends: 448 [2020-07-17 18:15:07,330 INFO L226 Difference]: Without dead ends: 440 [2020-07-17 18:15:07,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-07-17 18:15:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-07-17 18:15:07,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 430. [2020-07-17 18:15:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-07-17 18:15:07,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 431 transitions. [2020-07-17 18:15:07,438 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 431 transitions. Word has length 420 [2020-07-17 18:15:07,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:15:07,438 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 431 transitions. [2020-07-17 18:15:07,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-07-17 18:15:07,438 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 431 transitions. [2020-07-17 18:15:07,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-17 18:15:07,440 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:15:07,440 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] [2020-07-17 18:15:07,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2020-07-17 18:15:07,441 INFO L427 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:15:07,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:15:07,441 INFO L82 PathProgramCache]: Analyzing trace with hash 206524889, now seen corresponding path program 44 times [2020-07-17 18:15:07,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:15:07,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296522659] [2020-07-17 18:15:07,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:15:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:18,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:18,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9135 backedges. 0 proven. 9135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:15:18,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296522659] [2020-07-17 18:15:18,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:15:18,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2020-07-17 18:15:18,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402787498] [2020-07-17 18:15:18,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-07-17 18:15:18,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:15:18,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-07-17 18:15:18,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=8698, Unknown=0, NotChecked=0, Total=8930 [2020-07-17 18:15:18,679 INFO L87 Difference]: Start difference. First operand 430 states and 431 transitions. Second operand 95 states. [2020-07-17 18:15:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:15:48,034 INFO L93 Difference]: Finished difference Result 443 states and 444 transitions. [2020-07-17 18:15:48,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-07-17 18:15:48,037 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 422 [2020-07-17 18:15:48,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:15:48,040 INFO L225 Difference]: With dead ends: 443 [2020-07-17 18:15:48,040 INFO L226 Difference]: Without dead ends: 436 [2020-07-17 18:15:48,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9510 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=672, Invalid=32634, Unknown=0, NotChecked=0, Total=33306 [2020-07-17 18:15:48,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-07-17 18:15:48,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 433. [2020-07-17 18:15:48,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-07-17 18:15:48,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 434 transitions. [2020-07-17 18:15:48,148 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 434 transitions. Word has length 422 [2020-07-17 18:15:48,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:15:48,148 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 434 transitions. [2020-07-17 18:15:48,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-07-17 18:15:48,149 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 434 transitions. [2020-07-17 18:15:48,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-07-17 18:15:48,150 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:15:48,150 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] [2020-07-17 18:15:48,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2020-07-17 18:15:48,151 INFO L427 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:15:48,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:15:48,151 INFO L82 PathProgramCache]: Analyzing trace with hash -863923968, now seen corresponding path program 47 times [2020-07-17 18:15:48,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:15:48,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954089381] [2020-07-17 18:15:48,152 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:15:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:51,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:15:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9453 backedges. 46 proven. 9407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:15:51,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954089381] [2020-07-17 18:15:51,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:15:51,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-07-17 18:15:51,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683930906] [2020-07-17 18:15:51,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-07-17 18:15:51,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:15:51,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-07-17 18:15:51,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-07-17 18:15:51,919 INFO L87 Difference]: Start difference. First operand 433 states and 434 transitions. Second operand 50 states. [2020-07-17 18:15:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:15:57,340 INFO L93 Difference]: Finished difference Result 457 states and 459 transitions. [2020-07-17 18:15:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-07-17 18:15:57,344 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 429 [2020-07-17 18:15:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:15:57,346 INFO L225 Difference]: With dead ends: 457 [2020-07-17 18:15:57,346 INFO L226 Difference]: Without dead ends: 449 [2020-07-17 18:15:57,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-07-17 18:15:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-07-17 18:15:57,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 439. [2020-07-17 18:15:57,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-07-17 18:15:57,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 440 transitions. [2020-07-17 18:15:57,473 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 440 transitions. Word has length 429 [2020-07-17 18:15:57,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:15:57,473 INFO L479 AbstractCegarLoop]: Abstraction has 439 states and 440 transitions. [2020-07-17 18:15:57,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-07-17 18:15:57,474 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 440 transitions. [2020-07-17 18:15:57,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-07-17 18:15:57,476 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:15:57,476 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] [2020-07-17 18:15:57,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2020-07-17 18:15:57,477 INFO L427 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:15:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:15:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1614380803, now seen corresponding path program 45 times [2020-07-17 18:15:57,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:15:57,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440421514] [2020-07-17 18:15:57,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:15:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9545 backedges. 0 proven. 9545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:16:10,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440421514] [2020-07-17 18:16:10,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:16:10,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2020-07-17 18:16:10,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548848165] [2020-07-17 18:16:10,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-07-17 18:16:10,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:16:10,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-07-17 18:16:10,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=9075, Unknown=0, NotChecked=0, Total=9312 [2020-07-17 18:16:10,095 INFO L87 Difference]: Start difference. First operand 439 states and 440 transitions. Second operand 97 states. [2020-07-17 18:16:33,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:16:33,582 INFO L93 Difference]: Finished difference Result 452 states and 453 transitions. [2020-07-17 18:16:33,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-07-17 18:16:33,586 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 431 [2020-07-17 18:16:33,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:16:33,589 INFO L225 Difference]: With dead ends: 452 [2020-07-17 18:16:33,589 INFO L226 Difference]: Without dead ends: 445 [2020-07-17 18:16:33,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9951 ImplicationChecksByTransitivity, 22.0s TimeCoverageRelationStatistics Valid=687, Invalid=34095, Unknown=0, NotChecked=0, Total=34782 [2020-07-17 18:16:33,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-07-17 18:16:33,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 442. [2020-07-17 18:16:33,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-07-17 18:16:33,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 443 transitions. [2020-07-17 18:16:33,731 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 443 transitions. Word has length 431 [2020-07-17 18:16:33,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:16:33,732 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 443 transitions. [2020-07-17 18:16:33,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-07-17 18:16:33,732 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 443 transitions. [2020-07-17 18:16:33,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-07-17 18:16:33,734 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:16:33,734 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] [2020-07-17 18:16:33,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2020-07-17 18:16:33,735 INFO L427 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:16:33,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:16:33,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1121181546, now seen corresponding path program 48 times [2020-07-17 18:16:33,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:16:33,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113159063] [2020-07-17 18:16:33,736 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:16:33,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:38,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 47 proven. 9823 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:16:38,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113159063] [2020-07-17 18:16:38,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:16:38,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-07-17 18:16:38,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755537320] [2020-07-17 18:16:38,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-07-17 18:16:38,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:16:38,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-07-17 18:16:38,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-07-17 18:16:38,171 INFO L87 Difference]: Start difference. First operand 442 states and 443 transitions. Second operand 51 states. [2020-07-17 18:16:44,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:16:44,301 INFO L93 Difference]: Finished difference Result 466 states and 468 transitions. [2020-07-17 18:16:44,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-07-17 18:16:44,306 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 438 [2020-07-17 18:16:44,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:16:44,309 INFO L225 Difference]: With dead ends: 466 [2020-07-17 18:16:44,309 INFO L226 Difference]: Without dead ends: 458 [2020-07-17 18:16:44,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-07-17 18:16:44,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-07-17 18:16:44,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 448. [2020-07-17 18:16:44,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-07-17 18:16:44,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 449 transitions. [2020-07-17 18:16:44,451 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 449 transitions. Word has length 438 [2020-07-17 18:16:44,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:16:44,451 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 449 transitions. [2020-07-17 18:16:44,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-07-17 18:16:44,451 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 449 transitions. [2020-07-17 18:16:44,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2020-07-17 18:16:44,453 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:16:44,454 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] [2020-07-17 18:16:44,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2020-07-17 18:16:44,454 INFO L427 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:16:44,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:16:44,454 INFO L82 PathProgramCache]: Analyzing trace with hash -797015783, now seen corresponding path program 46 times [2020-07-17 18:16:44,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:16:44,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731459048] [2020-07-17 18:16:44,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:16:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:16:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 9964 backedges. 0 proven. 9964 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:16:58,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731459048] [2020-07-17 18:16:58,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:16:58,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2020-07-17 18:16:58,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680383962] [2020-07-17 18:16:58,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-07-17 18:16:58,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:16:58,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-07-17 18:16:58,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=9460, Unknown=0, NotChecked=0, Total=9702 [2020-07-17 18:16:58,084 INFO L87 Difference]: Start difference. First operand 448 states and 449 transitions. Second operand 99 states. [2020-07-17 18:17:24,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:17:24,371 INFO L93 Difference]: Finished difference Result 461 states and 462 transitions. [2020-07-17 18:17:24,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-07-17 18:17:24,376 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 440 [2020-07-17 18:17:24,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:17:24,378 INFO L225 Difference]: With dead ends: 461 [2020-07-17 18:17:24,378 INFO L226 Difference]: Without dead ends: 454 [2020-07-17 18:17:24,380 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10402 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=702, Invalid=35588, Unknown=0, NotChecked=0, Total=36290 [2020-07-17 18:17:24,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-07-17 18:17:24,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 451. [2020-07-17 18:17:24,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-07-17 18:17:24,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 452 transitions. [2020-07-17 18:17:24,501 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 452 transitions. Word has length 440 [2020-07-17 18:17:24,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:17:24,501 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 452 transitions. [2020-07-17 18:17:24,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-07-17 18:17:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 452 transitions. [2020-07-17 18:17:24,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-07-17 18:17:24,504 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:17:24,504 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] [2020-07-17 18:17:24,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2020-07-17 18:17:24,505 INFO L427 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:17:24,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:17:24,505 INFO L82 PathProgramCache]: Analyzing trace with hash 351975872, now seen corresponding path program 49 times [2020-07-17 18:17:24,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:17:24,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50751862] [2020-07-17 18:17:24,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:17:24,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10296 backedges. 48 proven. 10248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:17:29,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50751862] [2020-07-17 18:17:29,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:17:29,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-07-17 18:17:29,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310517636] [2020-07-17 18:17:29,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-17 18:17:29,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:17:29,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-17 18:17:29,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-07-17 18:17:29,352 INFO L87 Difference]: Start difference. First operand 451 states and 452 transitions. Second operand 52 states. [2020-07-17 18:17:36,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:17:36,215 INFO L93 Difference]: Finished difference Result 475 states and 477 transitions. [2020-07-17 18:17:36,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-07-17 18:17:36,219 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 447 [2020-07-17 18:17:36,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:17:36,223 INFO L225 Difference]: With dead ends: 475 [2020-07-17 18:17:36,223 INFO L226 Difference]: Without dead ends: 467 [2020-07-17 18:17:36,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2020-07-17 18:17:36,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-07-17 18:17:36,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 457. [2020-07-17 18:17:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-07-17 18:17:36,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 458 transitions. [2020-07-17 18:17:36,345 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 458 transitions. Word has length 447 [2020-07-17 18:17:36,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:17:36,346 INFO L479 AbstractCegarLoop]: Abstraction has 457 states and 458 transitions. [2020-07-17 18:17:36,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-17 18:17:36,346 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 458 transitions. [2020-07-17 18:17:36,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-17 18:17:36,348 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:17:36,348 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] [2020-07-17 18:17:36,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2020-07-17 18:17:36,348 INFO L427 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:17:36,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:17:36,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1863022531, now seen corresponding path program 47 times [2020-07-17 18:17:36,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:17:36,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [691724111] [2020-07-17 18:17:36,349 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:17:36,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:51,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:17:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10392 backedges. 0 proven. 10392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:17:51,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [691724111] [2020-07-17 18:17:51,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:17:51,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2020-07-17 18:17:51,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511041479] [2020-07-17 18:17:51,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-07-17 18:17:51,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:17:51,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-07-17 18:17:51,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=9853, Unknown=0, NotChecked=0, Total=10100 [2020-07-17 18:17:51,746 INFO L87 Difference]: Start difference. First operand 457 states and 458 transitions. Second operand 101 states. [2020-07-17 18:18:36,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:18:36,227 INFO L93 Difference]: Finished difference Result 470 states and 471 transitions. [2020-07-17 18:18:36,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-07-17 18:18:36,231 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 449 [2020-07-17 18:18:36,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:18:36,234 INFO L225 Difference]: With dead ends: 470 [2020-07-17 18:18:36,234 INFO L226 Difference]: Without dead ends: 463 [2020-07-17 18:18:36,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10863 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=717, Invalid=37113, Unknown=0, NotChecked=0, Total=37830 [2020-07-17 18:18:36,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-07-17 18:18:36,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 460. [2020-07-17 18:18:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-07-17 18:18:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 461 transitions. [2020-07-17 18:18:36,362 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 461 transitions. Word has length 449 [2020-07-17 18:18:36,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:18:36,362 INFO L479 AbstractCegarLoop]: Abstraction has 460 states and 461 transitions. [2020-07-17 18:18:36,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-07-17 18:18:36,362 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 461 transitions. [2020-07-17 18:18:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-07-17 18:18:36,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:18:36,365 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] [2020-07-17 18:18:36,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2020-07-17 18:18:36,365 INFO L427 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:18:36,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:18:36,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1651191850, now seen corresponding path program 50 times [2020-07-17 18:18:36,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:18:36,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482448805] [2020-07-17 18:18:36,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:18:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:18:41,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 49 proven. 10682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:18:41,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482448805] [2020-07-17 18:18:41,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:18:41,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-07-17 18:18:41,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274169507] [2020-07-17 18:18:41,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-07-17 18:18:41,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:18:41,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-07-17 18:18:41,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-07-17 18:18:41,858 INFO L87 Difference]: Start difference. First operand 460 states and 461 transitions. Second operand 53 states. [2020-07-17 18:18:49,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:18:49,549 INFO L93 Difference]: Finished difference Result 484 states and 486 transitions. [2020-07-17 18:18:49,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-17 18:18:49,554 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 456 [2020-07-17 18:18:49,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:18:49,557 INFO L225 Difference]: With dead ends: 484 [2020-07-17 18:18:49,557 INFO L226 Difference]: Without dead ends: 476 [2020-07-17 18:18:49,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-07-17 18:18:49,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-07-17 18:18:49,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 466. [2020-07-17 18:18:49,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-07-17 18:18:49,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 467 transitions. [2020-07-17 18:18:49,686 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 467 transitions. Word has length 456 [2020-07-17 18:18:49,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:18:49,686 INFO L479 AbstractCegarLoop]: Abstraction has 466 states and 467 transitions. [2020-07-17 18:18:49,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-07-17 18:18:49,686 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 467 transitions. [2020-07-17 18:18:49,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-07-17 18:18:49,688 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:18:49,689 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] [2020-07-17 18:18:49,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2020-07-17 18:18:49,689 INFO L427 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:18:49,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:18:49,690 INFO L82 PathProgramCache]: Analyzing trace with hash 964190297, now seen corresponding path program 48 times [2020-07-17 18:18:49,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:18:49,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951127456] [2020-07-17 18:18:49,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:18:49,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:19:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10829 backedges. 0 proven. 10829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:19:06,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951127456] [2020-07-17 18:19:06,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:19:06,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2020-07-17 18:19:06,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598876767] [2020-07-17 18:19:06,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-07-17 18:19:06,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:19:06,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-07-17 18:19:06,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=10254, Unknown=0, NotChecked=0, Total=10506 [2020-07-17 18:19:06,933 INFO L87 Difference]: Start difference. First operand 466 states and 467 transitions. Second operand 103 states. [2020-07-17 18:19:56,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:19:56,311 INFO L93 Difference]: Finished difference Result 479 states and 480 transitions. [2020-07-17 18:19:56,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-07-17 18:19:56,317 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 458 [2020-07-17 18:19:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:19:56,320 INFO L225 Difference]: With dead ends: 479 [2020-07-17 18:19:56,320 INFO L226 Difference]: Without dead ends: 472 [2020-07-17 18:19:56,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11334 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=732, Invalid=38670, Unknown=0, NotChecked=0, Total=39402 [2020-07-17 18:19:56,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-07-17 18:19:56,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 469. [2020-07-17 18:19:56,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-07-17 18:19:56,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 470 transitions. [2020-07-17 18:19:56,459 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 470 transitions. Word has length 458 [2020-07-17 18:19:56,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:19:56,459 INFO L479 AbstractCegarLoop]: Abstraction has 469 states and 470 transitions. [2020-07-17 18:19:56,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-07-17 18:19:56,459 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 470 transitions. [2020-07-17 18:19:56,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-07-17 18:19:56,462 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:19:56,463 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:19:56,463 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2020-07-17 18:19:56,463 INFO L427 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:19:56,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:19:56,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1883452032, now seen corresponding path program 51 times [2020-07-17 18:19:56,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:19:56,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111083211] [2020-07-17 18:19:56,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:19:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11175 backedges. 50 proven. 11125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:20:02,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111083211] [2020-07-17 18:20:02,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:20:02,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-07-17 18:20:02,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059387209] [2020-07-17 18:20:02,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-07-17 18:20:02,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:20:02,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-07-17 18:20:02,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-07-17 18:20:02,685 INFO L87 Difference]: Start difference. First operand 469 states and 470 transitions. Second operand 54 states. [2020-07-17 18:20:11,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:20:11,563 INFO L93 Difference]: Finished difference Result 493 states and 495 transitions. [2020-07-17 18:20:11,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-07-17 18:20:11,568 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 465 [2020-07-17 18:20:11,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:20:11,571 INFO L225 Difference]: With dead ends: 493 [2020-07-17 18:20:11,571 INFO L226 Difference]: Without dead ends: 485 [2020-07-17 18:20:11,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-07-17 18:20:11,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-07-17 18:20:11,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 475. [2020-07-17 18:20:11,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2020-07-17 18:20:11,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 476 transitions. [2020-07-17 18:20:11,708 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 476 transitions. Word has length 465 [2020-07-17 18:20:11,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:20:11,708 INFO L479 AbstractCegarLoop]: Abstraction has 475 states and 476 transitions. [2020-07-17 18:20:11,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-07-17 18:20:11,709 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 476 transitions. [2020-07-17 18:20:11,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-07-17 18:20:11,711 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:20:11,711 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:20:11,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2020-07-17 18:20:11,711 INFO L427 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:20:11,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:20:11,711 INFO L82 PathProgramCache]: Analyzing trace with hash 437829763, now seen corresponding path program 49 times [2020-07-17 18:20:11,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:20:11,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731207749] [2020-07-17 18:20:11,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:20:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 11275 backedges. 0 proven. 11275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:20:27,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731207749] [2020-07-17 18:20:27,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:20:27,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2020-07-17 18:20:27,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443102922] [2020-07-17 18:20:27,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2020-07-17 18:20:27,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:20:27,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2020-07-17 18:20:27,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=10663, Unknown=0, NotChecked=0, Total=10920 [2020-07-17 18:20:27,741 INFO L87 Difference]: Start difference. First operand 475 states and 476 transitions. Second operand 105 states. [2020-07-17 18:20:53,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:20:53,974 INFO L93 Difference]: Finished difference Result 488 states and 489 transitions. [2020-07-17 18:20:53,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-07-17 18:20:53,978 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 467 [2020-07-17 18:20:53,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:20:53,980 INFO L225 Difference]: With dead ends: 488 [2020-07-17 18:20:53,980 INFO L226 Difference]: Without dead ends: 481 [2020-07-17 18:20:53,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11815 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=747, Invalid=40259, Unknown=0, NotChecked=0, Total=41006 [2020-07-17 18:20:53,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-07-17 18:20:54,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 478. [2020-07-17 18:20:54,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-07-17 18:20:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 479 transitions. [2020-07-17 18:20:54,130 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 479 transitions. Word has length 467 [2020-07-17 18:20:54,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:20:54,130 INFO L479 AbstractCegarLoop]: Abstraction has 478 states and 479 transitions. [2020-07-17 18:20:54,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 105 states. [2020-07-17 18:20:54,130 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 479 transitions. [2020-07-17 18:20:54,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-07-17 18:20:54,132 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:20:54,133 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:20:54,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2020-07-17 18:20:54,133 INFO L427 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:20:54,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:20:54,133 INFO L82 PathProgramCache]: Analyzing trace with hash 392703766, now seen corresponding path program 52 times [2020-07-17 18:20:54,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:20:54,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953847219] [2020-07-17 18:20:54,134 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:20:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:20:58,986 INFO L134 CoverageAnalysis]: Checked inductivity of 11628 backedges. 51 proven. 11577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:20:58,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953847219] [2020-07-17 18:20:58,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:20:58,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-07-17 18:20:58,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973719252] [2020-07-17 18:20:58,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-07-17 18:20:58,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:20:58,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-07-17 18:20:58,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-07-17 18:20:58,989 INFO L87 Difference]: Start difference. First operand 478 states and 479 transitions. Second operand 55 states. [2020-07-17 18:21:05,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:21:05,778 INFO L93 Difference]: Finished difference Result 502 states and 504 transitions. [2020-07-17 18:21:05,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-07-17 18:21:05,781 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 474 [2020-07-17 18:21:05,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:21:05,783 INFO L225 Difference]: With dead ends: 502 [2020-07-17 18:21:05,783 INFO L226 Difference]: Without dead ends: 494 [2020-07-17 18:21:05,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-07-17 18:21:05,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2020-07-17 18:21:05,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 484. [2020-07-17 18:21:05,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-07-17 18:21:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 485 transitions. [2020-07-17 18:21:05,925 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 485 transitions. Word has length 474 [2020-07-17 18:21:05,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:21:05,925 INFO L479 AbstractCegarLoop]: Abstraction has 484 states and 485 transitions. [2020-07-17 18:21:05,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-07-17 18:21:05,925 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 485 transitions. [2020-07-17 18:21:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-17 18:21:05,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:21:05,927 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:21:05,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2020-07-17 18:21:05,927 INFO L427 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:21:05,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:21:05,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1947144295, now seen corresponding path program 50 times [2020-07-17 18:21:05,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:21:05,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549714064] [2020-07-17 18:21:05,927 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:21:05,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:21,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11730 backedges. 0 proven. 11730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:21:21,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549714064] [2020-07-17 18:21:21,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:21:21,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107] total 107 [2020-07-17 18:21:21,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104058315] [2020-07-17 18:21:21,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2020-07-17 18:21:21,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:21:21,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2020-07-17 18:21:21,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=11080, Unknown=0, NotChecked=0, Total=11342 [2020-07-17 18:21:21,151 INFO L87 Difference]: Start difference. First operand 484 states and 485 transitions. Second operand 107 states. [2020-07-17 18:21:48,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:21:48,898 INFO L93 Difference]: Finished difference Result 497 states and 498 transitions. [2020-07-17 18:21:48,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-07-17 18:21:48,902 INFO L78 Accepts]: Start accepts. Automaton has 107 states. Word has length 476 [2020-07-17 18:21:48,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:21:48,903 INFO L225 Difference]: With dead ends: 497 [2020-07-17 18:21:48,903 INFO L226 Difference]: Without dead ends: 490 [2020-07-17 18:21:48,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12306 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=762, Invalid=41880, Unknown=0, NotChecked=0, Total=42642 [2020-07-17 18:21:48,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-07-17 18:21:49,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 487. [2020-07-17 18:21:49,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 487 states. [2020-07-17 18:21:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 488 transitions. [2020-07-17 18:21:49,048 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 488 transitions. Word has length 476 [2020-07-17 18:21:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:21:49,048 INFO L479 AbstractCegarLoop]: Abstraction has 487 states and 488 transitions. [2020-07-17 18:21:49,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 107 states. [2020-07-17 18:21:49,048 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 488 transitions. [2020-07-17 18:21:49,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2020-07-17 18:21:49,050 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:21:49,050 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:21:49,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2020-07-17 18:21:49,050 INFO L427 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:21:49,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:21:49,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1490617536, now seen corresponding path program 53 times [2020-07-17 18:21:49,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:21:49,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171171179] [2020-07-17 18:21:49,051 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:21:49,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:21:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12090 backedges. 52 proven. 12038 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:21:54,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171171179] [2020-07-17 18:21:54,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:21:54,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-07-17 18:21:54,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85990982] [2020-07-17 18:21:54,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-07-17 18:21:54,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:21:54,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-07-17 18:21:54,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-07-17 18:21:54,318 INFO L87 Difference]: Start difference. First operand 487 states and 488 transitions. Second operand 56 states. [2020-07-17 18:22:01,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:22:01,584 INFO L93 Difference]: Finished difference Result 511 states and 513 transitions. [2020-07-17 18:22:01,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-07-17 18:22:01,587 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 483 [2020-07-17 18:22:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:22:01,589 INFO L225 Difference]: With dead ends: 511 [2020-07-17 18:22:01,589 INFO L226 Difference]: Without dead ends: 503 [2020-07-17 18:22:01,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2020-07-17 18:22:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2020-07-17 18:22:01,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 493. [2020-07-17 18:22:01,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 493 states. [2020-07-17 18:22:01,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 494 transitions. [2020-07-17 18:22:01,736 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 494 transitions. Word has length 483 [2020-07-17 18:22:01,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:22:01,737 INFO L479 AbstractCegarLoop]: Abstraction has 493 states and 494 transitions. [2020-07-17 18:22:01,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-07-17 18:22:01,737 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 494 transitions. [2020-07-17 18:22:01,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-07-17 18:22:01,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:22:01,739 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:22:01,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2020-07-17 18:22:01,739 INFO L427 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:22:01,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:22:01,739 INFO L82 PathProgramCache]: Analyzing trace with hash 657283395, now seen corresponding path program 51 times [2020-07-17 18:22:01,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:22:01,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15118073] [2020-07-17 18:22:01,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:22:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat