/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:47:46,701 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:47:46,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:47:46,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:47:46,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:47:46,762 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:47:46,766 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:47:46,771 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:47:46,774 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:47:46,777 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:47:46,778 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:47:46,779 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:47:46,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:47:46,783 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:47:46,786 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:47:46,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:47:46,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:47:46,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:47:46,793 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:47:46,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:47:46,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:47:46,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:47:46,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:47:46,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:47:46,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:47:46,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:47:46,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:47:46,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:47:46,836 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:47:46,854 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:47:46,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:47:46,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:47:46,858 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:47:46,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:47:46,858 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:47:46,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:47:46,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:47:46,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:47:46,859 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:47:46,860 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:47:46,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:47:46,861 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:47:46,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:47:46,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:47:46,862 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:47:46,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:47:46,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:47:46,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:47:46,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:47:46,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:47:46,864 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:47:46,865 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:47:47,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:47:47,176 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:47:47,181 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:47:47,183 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:47:47,183 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:47:47,184 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-08-22 19:47:47,268 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06859ca28/2823d2254d9c4e7c8e796a1cf08a2f09/FLAG53de5ce9d [2020-08-22 19:47:47,750 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:47:47,751 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-08-22 19:47:47,758 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06859ca28/2823d2254d9c4e7c8e796a1cf08a2f09/FLAG53de5ce9d [2020-08-22 19:47:48,121 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06859ca28/2823d2254d9c4e7c8e796a1cf08a2f09 [2020-08-22 19:47:48,130 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:47:48,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:47:48,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:47:48,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:47:48,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:47:48,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:47:48" (1/1) ... [2020-08-22 19:47:48,143 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@774a918d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:48, skipping insertion in model container [2020-08-22 19:47:48,143 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:47:48" (1/1) ... [2020-08-22 19:47:48,153 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:47:48,177 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:47:48,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:47:48,389 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:47:48,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:47:48,436 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:47:48,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:48 WrapperNode [2020-08-22 19:47:48,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:47:48,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:47:48,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:47:48,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:47:48,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:48" (1/1) ... [2020-08-22 19:47:48,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:48" (1/1) ... [2020-08-22 19:47:48,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:48" (1/1) ... [2020-08-22 19:47:48,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:48" (1/1) ... [2020-08-22 19:47:48,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:48" (1/1) ... [2020-08-22 19:47:48,479 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:48" (1/1) ... [2020-08-22 19:47:48,480 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:48" (1/1) ... [2020-08-22 19:47:48,568 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:47:48,574 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:47:48,574 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:47:48,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:47:48,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:47:48,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:47:48,653 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:47:48,653 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:47:48,653 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:47:48,653 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:47:48,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:47:48,653 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:47:48,653 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:47:48,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:47:48,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:47:48,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:47:48,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:47:48,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:47:48,871 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:47:48,872 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:47:48,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:47:48 BoogieIcfgContainer [2020-08-22 19:47:48,877 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:47:48,879 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:47:48,879 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:47:48,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:47:48,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:47:48" (1/3) ... [2020-08-22 19:47:48,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d4dae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:47:48, skipping insertion in model container [2020-08-22 19:47:48,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:48" (2/3) ... [2020-08-22 19:47:48,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68d4dae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:47:48, skipping insertion in model container [2020-08-22 19:47:48,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:47:48" (3/3) ... [2020-08-22 19:47:48,888 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-08-22 19:47:48,902 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:47:48,916 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:47:48,942 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:47:48,972 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:47:48,973 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:47:48,973 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:47:48,973 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:47:48,973 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:47:48,973 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:47:48,974 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:47:48,974 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:47:49,005 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-22 19:47:49,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-08-22 19:47:49,029 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:49,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:49,031 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:49,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:49,039 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-08-22 19:47:49,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:49,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961826066] [2020-08-22 19:47:49,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:49,110 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:49,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:49,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961826066] [2020-08-22 19:47:49,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:49,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 19:47:49,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732180389] [2020-08-22 19:47:49,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 19:47:49,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:49,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 19:47:49,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:47:49,214 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-08-22 19:47:49,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:49,246 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-08-22 19:47:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 19:47:49,248 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-08-22 19:47:49,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:49,257 INFO L225 Difference]: With dead ends: 41 [2020-08-22 19:47:49,257 INFO L226 Difference]: Without dead ends: 22 [2020-08-22 19:47:49,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:47:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-22 19:47:49,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-08-22 19:47:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 19:47:49,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-08-22 19:47:49,303 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2020-08-22 19:47:49,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:49,304 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-08-22 19:47:49,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 19:47:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-08-22 19:47:49,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 19:47:49,305 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:49,305 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:49,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:47:49,306 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:49,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:49,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1179723712, now seen corresponding path program 1 times [2020-08-22 19:47:49,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:49,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792502029] [2020-08-22 19:47:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:49,309 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:49,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:49,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:49,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792502029] [2020-08-22 19:47:49,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:49,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:47:49,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519219409] [2020-08-22 19:47:49,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:47:49,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:49,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:47:49,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:47:49,371 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2020-08-22 19:47:49,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:49,452 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-08-22 19:47:49,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:47:49,453 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-08-22 19:47:49,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:49,456 INFO L225 Difference]: With dead ends: 50 [2020-08-22 19:47:49,457 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 19:47:49,458 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 [2020-08-22 19:47:49,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 19:47:49,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2020-08-22 19:47:49,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 19:47:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 19:47:49,468 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-08-22 19:47:49,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:49,468 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 19:47:49,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:47:49,469 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 19:47:49,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 19:47:49,470 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:49,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:47:49,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:47:49,471 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:49,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:49,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1535220285, now seen corresponding path program 1 times [2020-08-22 19:47:49,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:49,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035204238] [2020-08-22 19:47:49,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:49,474 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:49,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:49,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:49,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035204238] [2020-08-22 19:47:49,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:49,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:47:49,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537571281] [2020-08-22 19:47:49,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:47:49,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:49,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:47:49,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:47:49,595 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-08-22 19:47:49,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:49,693 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-08-22 19:47:49,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:47:49,694 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-08-22 19:47:49,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:49,695 INFO L225 Difference]: With dead ends: 38 [2020-08-22 19:47:49,696 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 19:47:49,696 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 [2020-08-22 19:47:49,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 19:47:49,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-08-22 19:47:49,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 19:47:49,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 19:47:49,707 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 17 [2020-08-22 19:47:49,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:49,708 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 19:47:49,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:47:49,708 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 19:47:49,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 19:47:49,709 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:49,710 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] [2020-08-22 19:47:49,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:47:49,710 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:49,711 INFO L82 PathProgramCache]: Analyzing trace with hash 463086038, now seen corresponding path program 1 times [2020-08-22 19:47:49,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:49,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1775432593] [2020-08-22 19:47:49,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:49,737 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:49,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:49,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:49,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1775432593] [2020-08-22 19:47:49,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:49,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:47:49,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339480285] [2020-08-22 19:47:49,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:47:49,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:49,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:47:49,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:47:49,814 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-08-22 19:47:49,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:49,905 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-08-22 19:47:49,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:47:49,905 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-08-22 19:47:49,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:49,907 INFO L225 Difference]: With dead ends: 59 [2020-08-22 19:47:49,907 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 19:47:49,908 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 [2020-08-22 19:47:49,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 19:47:49,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-08-22 19:47:49,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 19:47:49,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 19:47:49,918 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 24 [2020-08-22 19:47:49,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:49,918 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 19:47:49,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:47:49,919 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 19:47:49,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 19:47:49,920 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:49,920 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] [2020-08-22 19:47:49,920 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:47:49,921 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:49,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:49,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1265709657, now seen corresponding path program 1 times [2020-08-22 19:47:49,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:49,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611873655] [2020-08-22 19:47:49,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:49,930 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:49,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:50,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:50,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:50,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611873655] [2020-08-22 19:47:50,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:50,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 19:47:50,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945868762] [2020-08-22 19:47:50,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 19:47:50,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:50,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 19:47:50,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:47:50,030 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-08-22 19:47:50,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:50,122 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 19:47:50,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 19:47:50,123 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-22 19:47:50,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:50,139 INFO L225 Difference]: With dead ends: 46 [2020-08-22 19:47:50,141 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 19:47:50,142 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 [2020-08-22 19:47:50,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 19:47:50,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-08-22 19:47:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 19:47:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 19:47:50,153 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2020-08-22 19:47:50,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:50,154 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 19:47:50,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 19:47:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 19:47:50,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 19:47:50,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:50,156 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] [2020-08-22 19:47:50,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:47:50,157 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:50,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:50,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1847206016, now seen corresponding path program 2 times [2020-08-22 19:47:50,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:50,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775661372] [2020-08-22 19:47:50,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:50,168 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:50,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:50,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:50,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:50,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775661372] [2020-08-22 19:47:50,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:50,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:47:50,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170261123] [2020-08-22 19:47:50,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:47:50,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:50,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:47:50,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:47:50,276 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 6 states. [2020-08-22 19:47:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:50,386 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-08-22 19:47:50,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:47:50,387 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-08-22 19:47:50,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:50,388 INFO L225 Difference]: With dead ends: 68 [2020-08-22 19:47:50,388 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 19:47:50,389 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 [2020-08-22 19:47:50,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 19:47:50,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-08-22 19:47:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 19:47:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 19:47:50,399 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 33 [2020-08-22 19:47:50,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:50,400 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 19:47:50,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:47:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 19:47:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 19:47:50,401 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:50,401 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] [2020-08-22 19:47:50,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:47:50,402 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:50,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:50,402 INFO L82 PathProgramCache]: Analyzing trace with hash -34853245, now seen corresponding path program 2 times [2020-08-22 19:47:50,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:50,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294162735] [2020-08-22 19:47:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:50,409 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:50,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:50,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:50,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:50,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294162735] [2020-08-22 19:47:50,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:50,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:47:50,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968177383] [2020-08-22 19:47:50,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:47:50,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:50,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:47:50,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:47:50,523 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 8 states. [2020-08-22 19:47:50,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:50,619 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-08-22 19:47:50,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 19:47:50,620 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-08-22 19:47:50,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:50,621 INFO L225 Difference]: With dead ends: 55 [2020-08-22 19:47:50,621 INFO L226 Difference]: Without dead ends: 48 [2020-08-22 19:47:50,622 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 [2020-08-22 19:47:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-22 19:47:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-08-22 19:47:50,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 19:47:50,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 19:47:50,632 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 35 [2020-08-22 19:47:50,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:50,633 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 19:47:50,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:47:50,633 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 19:47:50,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 19:47:50,634 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:50,634 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] [2020-08-22 19:47:50,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:47:50,635 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:50,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:50,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1854078698, now seen corresponding path program 3 times [2020-08-22 19:47:50,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:50,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466726856] [2020-08-22 19:47:50,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:50,642 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:50,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:50,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:50,712 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466726856] [2020-08-22 19:47:50,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:50,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 19:47:50,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477999158] [2020-08-22 19:47:50,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 19:47:50,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:50,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 19:47:50,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:47:50,717 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 7 states. [2020-08-22 19:47:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:50,819 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-08-22 19:47:50,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 19:47:50,821 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-08-22 19:47:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:50,822 INFO L225 Difference]: With dead ends: 77 [2020-08-22 19:47:50,824 INFO L226 Difference]: Without dead ends: 61 [2020-08-22 19:47:50,825 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 [2020-08-22 19:47:50,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-22 19:47:50,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2020-08-22 19:47:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 19:47:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-22 19:47:50,843 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 42 [2020-08-22 19:47:50,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:50,844 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-22 19:47:50,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 19:47:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-22 19:47:50,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 19:47:50,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:50,850 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] [2020-08-22 19:47:50,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:47:50,850 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:50,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:50,855 INFO L82 PathProgramCache]: Analyzing trace with hash -736542311, now seen corresponding path program 3 times [2020-08-22 19:47:50,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:50,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97316905] [2020-08-22 19:47:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:50,864 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:50,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:51,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:51,006 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97316905] [2020-08-22 19:47:51,006 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:51,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:47:51,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593361888] [2020-08-22 19:47:51,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:47:51,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:51,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:47:51,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:47:51,009 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 11 states. [2020-08-22 19:47:51,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:51,166 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-08-22 19:47:51,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:47:51,166 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-08-22 19:47:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:51,168 INFO L225 Difference]: With dead ends: 64 [2020-08-22 19:47:51,168 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 19:47:51,169 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 [2020-08-22 19:47:51,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 19:47:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-22 19:47:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 19:47:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-08-22 19:47:51,179 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 44 [2020-08-22 19:47:51,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:51,180 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-08-22 19:47:51,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:47:51,180 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-08-22 19:47:51,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 19:47:51,181 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:51,181 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] [2020-08-22 19:47:51,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 19:47:51,182 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:51,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:51,182 INFO L82 PathProgramCache]: Analyzing trace with hash -2107741888, now seen corresponding path program 4 times [2020-08-22 19:47:51,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:51,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690968146] [2020-08-22 19:47:51,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:51,189 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:51,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:51,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:51,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:51,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690968146] [2020-08-22 19:47:51,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:51,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:47:51,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214812525] [2020-08-22 19:47:51,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:47:51,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:51,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:47:51,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:47:51,272 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 8 states. [2020-08-22 19:47:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:51,380 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-08-22 19:47:51,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:47:51,381 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-08-22 19:47:51,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:51,382 INFO L225 Difference]: With dead ends: 86 [2020-08-22 19:47:51,383 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 19:47:51,383 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 [2020-08-22 19:47:51,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 19:47:51,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-08-22 19:47:51,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-08-22 19:47:51,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-08-22 19:47:51,395 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 51 [2020-08-22 19:47:51,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:51,395 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-08-22 19:47:51,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:47:51,395 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-08-22 19:47:51,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 19:47:51,396 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:51,396 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] [2020-08-22 19:47:51,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 19:47:51,397 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:51,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:51,397 INFO L82 PathProgramCache]: Analyzing trace with hash 306267971, now seen corresponding path program 4 times [2020-08-22 19:47:51,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:51,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627971780] [2020-08-22 19:47:51,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:51,404 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:51,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:51,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:51,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627971780] [2020-08-22 19:47:51,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:51,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 19:47:51,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813228291] [2020-08-22 19:47:51,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 19:47:51,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:51,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 19:47:51,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-22 19:47:51,589 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 13 states. [2020-08-22 19:47:51,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:51,806 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-08-22 19:47:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 19:47:51,806 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 53 [2020-08-22 19:47:51,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:51,807 INFO L225 Difference]: With dead ends: 73 [2020-08-22 19:47:51,808 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 19:47:51,808 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 [2020-08-22 19:47:51,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 19:47:51,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-08-22 19:47:51,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 19:47:51,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-08-22 19:47:51,825 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 53 [2020-08-22 19:47:51,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:51,826 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-08-22 19:47:51,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 19:47:51,826 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-08-22 19:47:51,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 19:47:51,830 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:51,830 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] [2020-08-22 19:47:51,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 19:47:51,830 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:51,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:51,831 INFO L82 PathProgramCache]: Analyzing trace with hash -392261546, now seen corresponding path program 5 times [2020-08-22 19:47:51,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:51,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1912825560] [2020-08-22 19:47:51,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:51,838 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:51,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:51,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:51,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1912825560] [2020-08-22 19:47:51,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:51,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:47:51,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568723725] [2020-08-22 19:47:51,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:47:51,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:51,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:47:51,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:47:51,953 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 9 states. [2020-08-22 19:47:52,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:52,087 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-08-22 19:47:52,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 19:47:52,088 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-08-22 19:47:52,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:52,089 INFO L225 Difference]: With dead ends: 95 [2020-08-22 19:47:52,089 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 19:47:52,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-08-22 19:47:52,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 19:47:52,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-08-22 19:47:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 19:47:52,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-08-22 19:47:52,102 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2020-08-22 19:47:52,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:52,116 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-08-22 19:47:52,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:47:52,116 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-08-22 19:47:52,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 19:47:52,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:52,118 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] [2020-08-22 19:47:52,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 19:47:52,118 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:52,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:52,118 INFO L82 PathProgramCache]: Analyzing trace with hash -384565031, now seen corresponding path program 5 times [2020-08-22 19:47:52,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:52,119 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692002066] [2020-08-22 19:47:52,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:52,130 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:52,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:52,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:52,294 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692002066] [2020-08-22 19:47:52,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:52,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 19:47:52,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781301583] [2020-08-22 19:47:52,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 19:47:52,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:52,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 19:47:52,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-08-22 19:47:52,296 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 15 states. [2020-08-22 19:47:52,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:52,533 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-08-22 19:47:52,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 19:47:52,534 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-08-22 19:47:52,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:52,535 INFO L225 Difference]: With dead ends: 82 [2020-08-22 19:47:52,535 INFO L226 Difference]: Without dead ends: 75 [2020-08-22 19:47:52,536 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 [2020-08-22 19:47:52,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-22 19:47:52,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-08-22 19:47:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 19:47:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-08-22 19:47:52,548 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 62 [2020-08-22 19:47:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:52,548 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-08-22 19:47:52,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 19:47:52,549 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-08-22 19:47:52,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 19:47:52,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:52,549 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] [2020-08-22 19:47:52,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 19:47:52,550 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:52,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:52,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1192623616, now seen corresponding path program 6 times [2020-08-22 19:47:52,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:52,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494414821] [2020-08-22 19:47:52,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:52,557 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:52,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:52,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494414821] [2020-08-22 19:47:52,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:52,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:47:52,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117959115] [2020-08-22 19:47:52,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:47:52,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:52,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:47:52,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:47:52,663 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 10 states. [2020-08-22 19:47:52,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:52,822 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2020-08-22 19:47:52,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 19:47:52,822 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-22 19:47:52,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:52,824 INFO L225 Difference]: With dead ends: 104 [2020-08-22 19:47:52,824 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 19:47:52,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-08-22 19:47:52,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 19:47:52,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-08-22 19:47:52,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-22 19:47:52,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-08-22 19:47:52,836 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 69 [2020-08-22 19:47:52,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:52,837 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-08-22 19:47:52,837 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:47:52,837 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-08-22 19:47:52,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 19:47:52,838 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:52,838 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] [2020-08-22 19:47:52,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 19:47:52,838 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:52,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:52,839 INFO L82 PathProgramCache]: Analyzing trace with hash -733368317, now seen corresponding path program 6 times [2020-08-22 19:47:52,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:52,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882384134] [2020-08-22 19:47:52,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:52,857 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:52,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:53,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:53,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882384134] [2020-08-22 19:47:53,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:53,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-08-22 19:47:53,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25881780] [2020-08-22 19:47:53,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 19:47:53,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:53,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 19:47:53,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-22 19:47:53,059 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 17 states. [2020-08-22 19:47:53,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:53,392 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-08-22 19:47:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 19:47:53,393 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-08-22 19:47:53,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:53,394 INFO L225 Difference]: With dead ends: 91 [2020-08-22 19:47:53,394 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 19:47:53,395 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 [2020-08-22 19:47:53,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 19:47:53,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-08-22 19:47:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 19:47:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-08-22 19:47:53,406 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 71 [2020-08-22 19:47:53,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:53,407 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-08-22 19:47:53,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 19:47:53,407 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-08-22 19:47:53,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 19:47:53,408 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:53,408 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] [2020-08-22 19:47:53,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 19:47:53,408 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:53,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:53,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1330458730, now seen corresponding path program 7 times [2020-08-22 19:47:53,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:53,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1700572526] [2020-08-22 19:47:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:53,415 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:53,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:53,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:53,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1700572526] [2020-08-22 19:47:53,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:53,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:47:53,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246562280] [2020-08-22 19:47:53,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:47:53,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:53,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:47:53,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:47:53,512 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 11 states. [2020-08-22 19:47:53,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:53,689 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-08-22 19:47:53,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 19:47:53,690 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2020-08-22 19:47:53,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:53,692 INFO L225 Difference]: With dead ends: 113 [2020-08-22 19:47:53,692 INFO L226 Difference]: Without dead ends: 97 [2020-08-22 19:47:53,693 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 [2020-08-22 19:47:53,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-08-22 19:47:53,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-08-22 19:47:53,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 19:47:53,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-08-22 19:47:53,709 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 78 [2020-08-22 19:47:53,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:53,709 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-08-22 19:47:53,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:47:53,709 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-08-22 19:47:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 19:47:53,710 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:53,710 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] [2020-08-22 19:47:53,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 19:47:53,711 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:53,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:53,711 INFO L82 PathProgramCache]: Analyzing trace with hash -48926695, now seen corresponding path program 7 times [2020-08-22 19:47:53,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:53,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958068940] [2020-08-22 19:47:53,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:53,718 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:53,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:53,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958068940] [2020-08-22 19:47:53,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:53,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-08-22 19:47:53,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672430552] [2020-08-22 19:47:53,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 19:47:53,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:53,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 19:47:53,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2020-08-22 19:47:53,984 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 19 states. [2020-08-22 19:47:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:54,344 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2020-08-22 19:47:54,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 19:47:54,344 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 80 [2020-08-22 19:47:54,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:54,345 INFO L225 Difference]: With dead ends: 100 [2020-08-22 19:47:54,346 INFO L226 Difference]: Without dead ends: 93 [2020-08-22 19:47:54,347 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 [2020-08-22 19:47:54,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-22 19:47:54,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2020-08-22 19:47:54,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 19:47:54,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-08-22 19:47:54,358 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 80 [2020-08-22 19:47:54,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:54,359 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-08-22 19:47:54,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 19:47:54,359 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-08-22 19:47:54,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 19:47:54,360 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:54,360 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] [2020-08-22 19:47:54,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 19:47:54,360 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:54,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:54,361 INFO L82 PathProgramCache]: Analyzing trace with hash -326571328, now seen corresponding path program 8 times [2020-08-22 19:47:54,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:54,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363341289] [2020-08-22 19:47:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:54,366 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:54,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:54,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:54,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363341289] [2020-08-22 19:47:54,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:54,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-08-22 19:47:54,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247586140] [2020-08-22 19:47:54,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 19:47:54,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:54,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 19:47:54,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-22 19:47:54,462 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 12 states. [2020-08-22 19:47:54,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:54,670 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-08-22 19:47:54,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 19:47:54,671 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-08-22 19:47:54,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:54,672 INFO L225 Difference]: With dead ends: 122 [2020-08-22 19:47:54,672 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 19:47:54,673 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 [2020-08-22 19:47:54,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 19:47:54,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2020-08-22 19:47:54,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 19:47:54,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2020-08-22 19:47:54,687 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 87 [2020-08-22 19:47:54,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:54,688 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2020-08-22 19:47:54,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 19:47:54,688 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2020-08-22 19:47:54,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 19:47:54,689 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:54,689 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] [2020-08-22 19:47:54,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 19:47:54,690 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:54,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:54,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1680774973, now seen corresponding path program 8 times [2020-08-22 19:47:54,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:54,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708232590] [2020-08-22 19:47:54,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:54,696 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:54,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:54,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:54,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708232590] [2020-08-22 19:47:54,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:54,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-08-22 19:47:54,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687922402] [2020-08-22 19:47:54,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 19:47:54,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:54,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 19:47:54,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-08-22 19:47:54,977 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand 21 states. [2020-08-22 19:47:55,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:55,447 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2020-08-22 19:47:55,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 19:47:55,448 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 89 [2020-08-22 19:47:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:55,450 INFO L225 Difference]: With dead ends: 109 [2020-08-22 19:47:55,450 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 19:47:55,451 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 [2020-08-22 19:47:55,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 19:47:55,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-08-22 19:47:55,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 19:47:55,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-08-22 19:47:55,465 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 89 [2020-08-22 19:47:55,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:55,465 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-08-22 19:47:55,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 19:47:55,465 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-08-22 19:47:55,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 19:47:55,466 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:55,466 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] [2020-08-22 19:47:55,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 19:47:55,466 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:55,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:55,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1953349334, now seen corresponding path program 9 times [2020-08-22 19:47:55,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:55,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049353234] [2020-08-22 19:47:55,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:55,471 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:55,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:55,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:55,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:55,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049353234] [2020-08-22 19:47:55,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:55,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-08-22 19:47:55,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187133329] [2020-08-22 19:47:55,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 19:47:55,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:55,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 19:47:55,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-22 19:47:55,605 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 13 states. [2020-08-22 19:47:55,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:55,794 INFO L93 Difference]: Finished difference Result 131 states and 135 transitions. [2020-08-22 19:47:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 19:47:55,795 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 96 [2020-08-22 19:47:55,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:55,795 INFO L225 Difference]: With dead ends: 131 [2020-08-22 19:47:55,796 INFO L226 Difference]: Without dead ends: 115 [2020-08-22 19:47:55,798 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 [2020-08-22 19:47:55,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-22 19:47:55,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2020-08-22 19:47:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 19:47:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-08-22 19:47:55,815 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 96 [2020-08-22 19:47:55,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:55,815 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-08-22 19:47:55,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 19:47:55,816 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-08-22 19:47:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 19:47:55,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:55,817 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] [2020-08-22 19:47:55,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 19:47:55,817 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:55,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:55,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1110339751, now seen corresponding path program 9 times [2020-08-22 19:47:55,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:55,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231662623] [2020-08-22 19:47:55,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:55,828 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:56,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:56,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:56,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:56,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231662623] [2020-08-22 19:47:56,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:56,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-08-22 19:47:56,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351809708] [2020-08-22 19:47:56,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 19:47:56,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:56,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 19:47:56,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2020-08-22 19:47:56,182 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 23 states. [2020-08-22 19:47:56,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:56,884 INFO L93 Difference]: Finished difference Result 118 states and 119 transitions. [2020-08-22 19:47:56,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 19:47:56,885 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 98 [2020-08-22 19:47:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:56,887 INFO L225 Difference]: With dead ends: 118 [2020-08-22 19:47:56,887 INFO L226 Difference]: Without dead ends: 111 [2020-08-22 19:47:56,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=1350, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 19:47:56,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-08-22 19:47:56,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2020-08-22 19:47:56,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-22 19:47:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-08-22 19:47:56,912 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 98 [2020-08-22 19:47:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:56,912 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-08-22 19:47:56,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 19:47:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-08-22 19:47:56,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-08-22 19:47:56,915 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:56,915 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] [2020-08-22 19:47:56,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 19:47:56,916 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:56,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:56,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1560748928, now seen corresponding path program 10 times [2020-08-22 19:47:56,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:56,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588338504] [2020-08-22 19:47:56,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:56,926 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:57,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:57,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588338504] [2020-08-22 19:47:57,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:57,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-08-22 19:47:57,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621426290] [2020-08-22 19:47:57,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 19:47:57,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:57,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 19:47:57,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-22 19:47:57,150 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 14 states. [2020-08-22 19:47:57,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:57,449 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2020-08-22 19:47:57,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 19:47:57,451 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 105 [2020-08-22 19:47:57,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:57,453 INFO L225 Difference]: With dead ends: 140 [2020-08-22 19:47:57,453 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 19:47:57,455 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 [2020-08-22 19:47:57,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 19:47:57,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 114. [2020-08-22 19:47:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 19:47:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2020-08-22 19:47:57,475 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 105 [2020-08-22 19:47:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:57,476 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2020-08-22 19:47:57,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 19:47:57,476 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2020-08-22 19:47:57,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-22 19:47:57,477 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:57,478 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] [2020-08-22 19:47:57,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 19:47:57,478 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:57,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:57,479 INFO L82 PathProgramCache]: Analyzing trace with hash -442207869, now seen corresponding path program 10 times [2020-08-22 19:47:57,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:57,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504569665] [2020-08-22 19:47:57,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:57,486 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:57,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:57,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504569665] [2020-08-22 19:47:57,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:57,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-08-22 19:47:57,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449001716] [2020-08-22 19:47:57,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 19:47:57,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:57,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 19:47:57,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-22 19:47:57,906 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand 25 states. [2020-08-22 19:47:58,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:58,559 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2020-08-22 19:47:58,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 19:47:58,560 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 107 [2020-08-22 19:47:58,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:58,561 INFO L225 Difference]: With dead ends: 127 [2020-08-22 19:47:58,561 INFO L226 Difference]: Without dead ends: 120 [2020-08-22 19:47:58,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=1659, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 19:47:58,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-08-22 19:47:58,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-08-22 19:47:58,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-08-22 19:47:58,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2020-08-22 19:47:58,577 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 107 [2020-08-22 19:47:58,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:58,578 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2020-08-22 19:47:58,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 19:47:58,578 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2020-08-22 19:47:58,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-08-22 19:47:58,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:58,579 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] [2020-08-22 19:47:58,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 19:47:58,579 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:58,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:58,580 INFO L82 PathProgramCache]: Analyzing trace with hash -108831210, now seen corresponding path program 11 times [2020-08-22 19:47:58,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:58,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542240897] [2020-08-22 19:47:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:58,584 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:58,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:58,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:58,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542240897] [2020-08-22 19:47:58,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:58,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-08-22 19:47:58,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547794911] [2020-08-22 19:47:58,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 19:47:58,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:58,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 19:47:58,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-22 19:47:58,751 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand 15 states. [2020-08-22 19:47:59,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:59,042 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2020-08-22 19:47:59,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 19:47:59,042 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 114 [2020-08-22 19:47:59,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:59,043 INFO L225 Difference]: With dead ends: 149 [2020-08-22 19:47:59,044 INFO L226 Difference]: Without dead ends: 133 [2020-08-22 19:47:59,044 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 [2020-08-22 19:47:59,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-22 19:47:59,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 123. [2020-08-22 19:47:59,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-08-22 19:47:59,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2020-08-22 19:47:59,062 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 114 [2020-08-22 19:47:59,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:59,062 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2020-08-22 19:47:59,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 19:47:59,062 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2020-08-22 19:47:59,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 19:47:59,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:59,064 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] [2020-08-22 19:47:59,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 19:47:59,064 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:59,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:59,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1409048217, now seen corresponding path program 11 times [2020-08-22 19:47:59,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:59,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197803500] [2020-08-22 19:47:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:59,072 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:59,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:59,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:59,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197803500] [2020-08-22 19:47:59,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:59,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-08-22 19:47:59,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872931497] [2020-08-22 19:47:59,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 19:47:59,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:59,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 19:47:59,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=640, Unknown=0, NotChecked=0, Total=702 [2020-08-22 19:47:59,537 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 27 states. [2020-08-22 19:48:00,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:00,283 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2020-08-22 19:48:00,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 19:48:00,286 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 116 [2020-08-22 19:48:00,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:00,287 INFO L225 Difference]: With dead ends: 136 [2020-08-22 19:48:00,287 INFO L226 Difference]: Without dead ends: 129 [2020-08-22 19:48:00,289 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 [2020-08-22 19:48:00,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-08-22 19:48:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2020-08-22 19:48:00,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-22 19:48:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2020-08-22 19:48:00,317 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 116 [2020-08-22 19:48:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:00,318 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2020-08-22 19:48:00,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 19:48:00,318 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2020-08-22 19:48:00,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-08-22 19:48:00,319 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:00,319 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] [2020-08-22 19:48:00,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 19:48:00,320 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:00,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:00,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1865460800, now seen corresponding path program 12 times [2020-08-22 19:48:00,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:00,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915852517] [2020-08-22 19:48:00,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:00,330 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:00,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:00,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915852517] [2020-08-22 19:48:00,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:00,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-08-22 19:48:00,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094059530] [2020-08-22 19:48:00,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 19:48:00,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:00,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 19:48:00,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-08-22 19:48:00,493 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 16 states. [2020-08-22 19:48:00,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:00,822 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-08-22 19:48:00,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 19:48:00,822 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 123 [2020-08-22 19:48:00,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:00,824 INFO L225 Difference]: With dead ends: 158 [2020-08-22 19:48:00,825 INFO L226 Difference]: Without dead ends: 142 [2020-08-22 19:48:00,826 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 [2020-08-22 19:48:00,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-22 19:48:00,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 132. [2020-08-22 19:48:00,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 19:48:00,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2020-08-22 19:48:00,855 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 123 [2020-08-22 19:48:00,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:00,855 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2020-08-22 19:48:00,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 19:48:00,856 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2020-08-22 19:48:00,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-08-22 19:48:00,858 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:00,858 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] [2020-08-22 19:48:00,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 19:48:00,859 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:00,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:00,859 INFO L82 PathProgramCache]: Analyzing trace with hash 328124995, now seen corresponding path program 12 times [2020-08-22 19:48:00,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:00,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306548191] [2020-08-22 19:48:00,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:00,871 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:00,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:01,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:01,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:01,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306548191] [2020-08-22 19:48:01,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:01,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-08-22 19:48:01,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408843461] [2020-08-22 19:48:01,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 19:48:01,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:01,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 19:48:01,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2020-08-22 19:48:01,381 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 29 states. [2020-08-22 19:48:02,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:02,203 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2020-08-22 19:48:02,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 19:48:02,204 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 125 [2020-08-22 19:48:02,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:02,206 INFO L225 Difference]: With dead ends: 145 [2020-08-22 19:48:02,206 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 19:48:02,208 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 [2020-08-22 19:48:02,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 19:48:02,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2020-08-22 19:48:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-08-22 19:48:02,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2020-08-22 19:48:02,227 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 125 [2020-08-22 19:48:02,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:02,228 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2020-08-22 19:48:02,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 19:48:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2020-08-22 19:48:02,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-08-22 19:48:02,230 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:02,230 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] [2020-08-22 19:48:02,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 19:48:02,230 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:02,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:02,230 INFO L82 PathProgramCache]: Analyzing trace with hash -2136494762, now seen corresponding path program 13 times [2020-08-22 19:48:02,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:02,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015438434] [2020-08-22 19:48:02,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:02,243 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:02,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:02,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015438434] [2020-08-22 19:48:02,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:02,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-08-22 19:48:02,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025478750] [2020-08-22 19:48:02,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 19:48:02,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:02,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 19:48:02,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-08-22 19:48:02,457 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 17 states. [2020-08-22 19:48:02,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:02,784 INFO L93 Difference]: Finished difference Result 167 states and 171 transitions. [2020-08-22 19:48:02,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 19:48:02,785 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 132 [2020-08-22 19:48:02,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:02,786 INFO L225 Difference]: With dead ends: 167 [2020-08-22 19:48:02,786 INFO L226 Difference]: Without dead ends: 151 [2020-08-22 19:48:02,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2020-08-22 19:48:02,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-22 19:48:02,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2020-08-22 19:48:02,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-08-22 19:48:02,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2020-08-22 19:48:02,808 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 132 [2020-08-22 19:48:02,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:02,808 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2020-08-22 19:48:02,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 19:48:02,808 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2020-08-22 19:48:02,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-08-22 19:48:02,810 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:02,810 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] [2020-08-22 19:48:02,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 19:48:02,810 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:02,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:02,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1555440167, now seen corresponding path program 13 times [2020-08-22 19:48:02,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:02,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195323040] [2020-08-22 19:48:02,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:02,815 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:02,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:03,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:03,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:03,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195323040] [2020-08-22 19:48:03,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:03,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-08-22 19:48:03,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256525985] [2020-08-22 19:48:03,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 19:48:03,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:03,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 19:48:03,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=858, Unknown=0, NotChecked=0, Total=930 [2020-08-22 19:48:03,361 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand 31 states. [2020-08-22 19:48:04,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:04,294 INFO L93 Difference]: Finished difference Result 154 states and 155 transitions. [2020-08-22 19:48:04,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 19:48:04,294 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 134 [2020-08-22 19:48:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:04,296 INFO L225 Difference]: With dead ends: 154 [2020-08-22 19:48:04,296 INFO L226 Difference]: Without dead ends: 147 [2020-08-22 19:48:04,298 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 [2020-08-22 19:48:04,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-08-22 19:48:04,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2020-08-22 19:48:04,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-22 19:48:04,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2020-08-22 19:48:04,318 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 134 [2020-08-22 19:48:04,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:04,318 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2020-08-22 19:48:04,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 19:48:04,319 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2020-08-22 19:48:04,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-08-22 19:48:04,320 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:04,320 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] [2020-08-22 19:48:04,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 19:48:04,321 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:04,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:04,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1825670400, now seen corresponding path program 14 times [2020-08-22 19:48:04,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:04,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270746557] [2020-08-22 19:48:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:04,328 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:04,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:04,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:04,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270746557] [2020-08-22 19:48:04,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:04,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-08-22 19:48:04,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618408887] [2020-08-22 19:48:04,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 19:48:04,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:04,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 19:48:04,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-08-22 19:48:04,533 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand 18 states. [2020-08-22 19:48:04,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:04,866 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2020-08-22 19:48:04,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 19:48:04,867 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 141 [2020-08-22 19:48:04,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:04,868 INFO L225 Difference]: With dead ends: 176 [2020-08-22 19:48:04,869 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 19:48:04,870 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 [2020-08-22 19:48:04,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 19:48:04,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 150. [2020-08-22 19:48:04,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-22 19:48:04,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2020-08-22 19:48:04,892 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 141 [2020-08-22 19:48:04,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:04,893 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2020-08-22 19:48:04,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 19:48:04,893 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2020-08-22 19:48:04,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-08-22 19:48:04,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:04,894 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] [2020-08-22 19:48:04,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 19:48:04,895 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:04,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:04,895 INFO L82 PathProgramCache]: Analyzing trace with hash 744256259, now seen corresponding path program 14 times [2020-08-22 19:48:04,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:04,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64441516] [2020-08-22 19:48:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:04,906 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:04,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:05,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:05,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:05,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64441516] [2020-08-22 19:48:05,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:05,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-08-22 19:48:05,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096294531] [2020-08-22 19:48:05,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 19:48:05,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:05,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 19:48:05,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 19:48:05,549 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 33 states. [2020-08-22 19:48:06,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:06,621 INFO L93 Difference]: Finished difference Result 163 states and 164 transitions. [2020-08-22 19:48:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 19:48:06,622 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 143 [2020-08-22 19:48:06,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:06,624 INFO L225 Difference]: With dead ends: 163 [2020-08-22 19:48:06,624 INFO L226 Difference]: Without dead ends: 156 [2020-08-22 19:48:06,625 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 [2020-08-22 19:48:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-08-22 19:48:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 153. [2020-08-22 19:48:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-08-22 19:48:06,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2020-08-22 19:48:06,645 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 143 [2020-08-22 19:48:06,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:06,645 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2020-08-22 19:48:06,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 19:48:06,646 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2020-08-22 19:48:06,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-08-22 19:48:06,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:06,647 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] [2020-08-22 19:48:06,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 19:48:06,647 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:06,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:06,648 INFO L82 PathProgramCache]: Analyzing trace with hash 93236374, now seen corresponding path program 15 times [2020-08-22 19:48:06,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:06,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769571060] [2020-08-22 19:48:06,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:06,655 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:06,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:06,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:06,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769571060] [2020-08-22 19:48:06,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:06,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-08-22 19:48:06,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849296552] [2020-08-22 19:48:06,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 19:48:06,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:06,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 19:48:06,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-08-22 19:48:06,901 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand 19 states. [2020-08-22 19:48:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:07,262 INFO L93 Difference]: Finished difference Result 185 states and 189 transitions. [2020-08-22 19:48:07,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 19:48:07,263 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 150 [2020-08-22 19:48:07,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:07,264 INFO L225 Difference]: With dead ends: 185 [2020-08-22 19:48:07,264 INFO L226 Difference]: Without dead ends: 169 [2020-08-22 19:48:07,265 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 [2020-08-22 19:48:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-22 19:48:07,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2020-08-22 19:48:07,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-08-22 19:48:07,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2020-08-22 19:48:07,284 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 150 [2020-08-22 19:48:07,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:07,285 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2020-08-22 19:48:07,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 19:48:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2020-08-22 19:48:07,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-08-22 19:48:07,286 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:07,286 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] [2020-08-22 19:48:07,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 19:48:07,287 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:07,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:07,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1972499175, now seen corresponding path program 15 times [2020-08-22 19:48:07,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:07,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950287340] [2020-08-22 19:48:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:07,295 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:07,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:08,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:08,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950287340] [2020-08-22 19:48:08,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:08,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-08-22 19:48:08,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428764733] [2020-08-22 19:48:08,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 19:48:08,050 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:08,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 19:48:08,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1108, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 19:48:08,051 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 35 states. [2020-08-22 19:48:09,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:09,270 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2020-08-22 19:48:09,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 19:48:09,271 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 152 [2020-08-22 19:48:09,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:09,273 INFO L225 Difference]: With dead ends: 172 [2020-08-22 19:48:09,273 INFO L226 Difference]: Without dead ends: 165 [2020-08-22 19:48:09,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=222, Invalid=3684, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 19:48:09,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-08-22 19:48:09,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-08-22 19:48:09,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 19:48:09,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2020-08-22 19:48:09,301 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 152 [2020-08-22 19:48:09,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:09,302 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2020-08-22 19:48:09,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 19:48:09,302 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2020-08-22 19:48:09,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-08-22 19:48:09,303 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:09,303 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] [2020-08-22 19:48:09,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 19:48:09,304 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:09,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1152757184, now seen corresponding path program 16 times [2020-08-22 19:48:09,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:09,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858640894] [2020-08-22 19:48:09,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:09,314 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:09,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:09,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:09,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858640894] [2020-08-22 19:48:09,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:09,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-08-22 19:48:09,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384689152] [2020-08-22 19:48:09,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 19:48:09,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:09,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 19:48:09,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-08-22 19:48:09,554 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand 20 states. [2020-08-22 19:48:09,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:09,981 INFO L93 Difference]: Finished difference Result 194 states and 198 transitions. [2020-08-22 19:48:09,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 19:48:09,982 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 159 [2020-08-22 19:48:09,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:09,984 INFO L225 Difference]: With dead ends: 194 [2020-08-22 19:48:09,984 INFO L226 Difference]: Without dead ends: 178 [2020-08-22 19:48:09,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 19:48:09,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-22 19:48:10,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2020-08-22 19:48:10,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 19:48:10,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2020-08-22 19:48:10,021 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 159 [2020-08-22 19:48:10,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:10,022 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2020-08-22 19:48:10,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 19:48:10,022 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2020-08-22 19:48:10,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-08-22 19:48:10,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:10,024 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] [2020-08-22 19:48:10,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 19:48:10,024 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:10,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:10,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1680249917, now seen corresponding path program 16 times [2020-08-22 19:48:10,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:10,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243749719] [2020-08-22 19:48:10,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:10,043 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:10,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:10,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243749719] [2020-08-22 19:48:10,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:10,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-08-22 19:48:10,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975382912] [2020-08-22 19:48:10,865 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 19:48:10,865 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:10,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 19:48:10,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1245, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 19:48:10,866 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand 37 states. [2020-08-22 19:48:12,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:12,238 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2020-08-22 19:48:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 19:48:12,239 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 161 [2020-08-22 19:48:12,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:12,240 INFO L225 Difference]: With dead ends: 181 [2020-08-22 19:48:12,241 INFO L226 Difference]: Without dead ends: 174 [2020-08-22 19:48:12,243 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 [2020-08-22 19:48:12,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-22 19:48:12,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2020-08-22 19:48:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-08-22 19:48:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2020-08-22 19:48:12,276 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 161 [2020-08-22 19:48:12,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:12,277 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2020-08-22 19:48:12,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 19:48:12,277 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2020-08-22 19:48:12,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-08-22 19:48:12,279 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:12,279 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] [2020-08-22 19:48:12,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 19:48:12,279 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:12,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:12,280 INFO L82 PathProgramCache]: Analyzing trace with hash 2129419222, now seen corresponding path program 17 times [2020-08-22 19:48:12,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:12,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053973542] [2020-08-22 19:48:12,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:12,291 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:12,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:12,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:12,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053973542] [2020-08-22 19:48:12,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:12,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-08-22 19:48:12,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920160834] [2020-08-22 19:48:12,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 19:48:12,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:12,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 19:48:12,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-08-22 19:48:12,586 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 21 states. [2020-08-22 19:48:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:13,013 INFO L93 Difference]: Finished difference Result 203 states and 207 transitions. [2020-08-22 19:48:13,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 19:48:13,013 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 168 [2020-08-22 19:48:13,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:13,015 INFO L225 Difference]: With dead ends: 203 [2020-08-22 19:48:13,015 INFO L226 Difference]: Without dead ends: 187 [2020-08-22 19:48:13,015 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 [2020-08-22 19:48:13,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-22 19:48:13,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2020-08-22 19:48:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-08-22 19:48:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2020-08-22 19:48:13,036 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 168 [2020-08-22 19:48:13,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:13,037 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2020-08-22 19:48:13,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 19:48:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2020-08-22 19:48:13,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-08-22 19:48:13,038 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:13,038 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] [2020-08-22 19:48:13,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 19:48:13,038 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:13,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:13,039 INFO L82 PathProgramCache]: Analyzing trace with hash 589098073, now seen corresponding path program 17 times [2020-08-22 19:48:13,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:13,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084950252] [2020-08-22 19:48:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:13,050 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:13,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:13,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:13,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084950252] [2020-08-22 19:48:13,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:13,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-08-22 19:48:13,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368700905] [2020-08-22 19:48:13,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 19:48:13,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:13,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 19:48:13,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1390, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 19:48:13,911 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand 39 states. [2020-08-22 19:48:15,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:15,412 INFO L93 Difference]: Finished difference Result 190 states and 191 transitions. [2020-08-22 19:48:15,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 19:48:15,413 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 170 [2020-08-22 19:48:15,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:15,414 INFO L225 Difference]: With dead ends: 190 [2020-08-22 19:48:15,414 INFO L226 Difference]: Without dead ends: 183 [2020-08-22 19:48:15,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=252, Invalid=4718, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 19:48:15,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-08-22 19:48:15,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2020-08-22 19:48:15,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-22 19:48:15,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2020-08-22 19:48:15,450 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 170 [2020-08-22 19:48:15,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:15,450 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2020-08-22 19:48:15,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 19:48:15,451 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2020-08-22 19:48:15,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-08-22 19:48:15,452 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:15,452 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] [2020-08-22 19:48:15,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 19:48:15,452 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:15,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:15,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1252599424, now seen corresponding path program 18 times [2020-08-22 19:48:15,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:15,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147157773] [2020-08-22 19:48:15,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:15,458 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:15,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:15,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:15,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147157773] [2020-08-22 19:48:15,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:15,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-08-22 19:48:15,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387961783] [2020-08-22 19:48:15,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 19:48:15,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:15,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 19:48:15,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-08-22 19:48:15,803 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 22 states. [2020-08-22 19:48:16,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:16,341 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2020-08-22 19:48:16,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 19:48:16,341 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 177 [2020-08-22 19:48:16,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:16,343 INFO L225 Difference]: With dead ends: 212 [2020-08-22 19:48:16,343 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 19:48:16,344 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 [2020-08-22 19:48:16,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 19:48:16,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 186. [2020-08-22 19:48:16,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 19:48:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2020-08-22 19:48:16,373 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 177 [2020-08-22 19:48:16,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:16,374 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2020-08-22 19:48:16,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 19:48:16,374 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2020-08-22 19:48:16,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-08-22 19:48:16,375 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:16,376 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] [2020-08-22 19:48:16,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 19:48:16,376 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:16,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:16,376 INFO L82 PathProgramCache]: Analyzing trace with hash -221137789, now seen corresponding path program 18 times [2020-08-22 19:48:16,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:16,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [665441821] [2020-08-22 19:48:16,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:16,382 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:16,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:17,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:17,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:17,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [665441821] [2020-08-22 19:48:17,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:17,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-08-22 19:48:17,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567969482] [2020-08-22 19:48:17,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 19:48:17,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:17,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 19:48:17,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1543, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 19:48:17,348 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 41 states. [2020-08-22 19:48:19,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:19,026 INFO L93 Difference]: Finished difference Result 199 states and 200 transitions. [2020-08-22 19:48:19,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 19:48:19,027 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 179 [2020-08-22 19:48:19,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:19,029 INFO L225 Difference]: With dead ends: 199 [2020-08-22 19:48:19,029 INFO L226 Difference]: Without dead ends: 192 [2020-08-22 19:48:19,032 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=267, Invalid=5283, Unknown=0, NotChecked=0, Total=5550 [2020-08-22 19:48:19,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-08-22 19:48:19,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 189. [2020-08-22 19:48:19,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-08-22 19:48:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2020-08-22 19:48:19,058 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 179 [2020-08-22 19:48:19,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:19,058 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2020-08-22 19:48:19,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 19:48:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2020-08-22 19:48:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-08-22 19:48:19,059 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:19,059 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] [2020-08-22 19:48:19,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 19:48:19,059 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:19,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:19,059 INFO L82 PathProgramCache]: Analyzing trace with hash 510966550, now seen corresponding path program 19 times [2020-08-22 19:48:19,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:19,060 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402328658] [2020-08-22 19:48:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:19,066 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:19,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:19,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402328658] [2020-08-22 19:48:19,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:19,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-08-22 19:48:19,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819027580] [2020-08-22 19:48:19,388 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 19:48:19,388 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:19,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 19:48:19,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-08-22 19:48:19,389 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand 23 states. [2020-08-22 19:48:19,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:19,901 INFO L93 Difference]: Finished difference Result 221 states and 225 transitions. [2020-08-22 19:48:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 19:48:19,901 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 186 [2020-08-22 19:48:19,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:19,903 INFO L225 Difference]: With dead ends: 221 [2020-08-22 19:48:19,903 INFO L226 Difference]: Without dead ends: 205 [2020-08-22 19:48:19,903 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 [2020-08-22 19:48:19,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-22 19:48:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 195. [2020-08-22 19:48:19,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-08-22 19:48:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2020-08-22 19:48:19,942 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 186 [2020-08-22 19:48:19,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:19,943 INFO L479 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2020-08-22 19:48:19,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 19:48:19,943 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2020-08-22 19:48:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-08-22 19:48:19,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:19,945 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] [2020-08-22 19:48:19,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 19:48:19,945 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:19,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:19,945 INFO L82 PathProgramCache]: Analyzing trace with hash 34241433, now seen corresponding path program 19 times [2020-08-22 19:48:19,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:19,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618107977] [2020-08-22 19:48:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:19,956 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:19,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:20,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:20,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:20,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618107977] [2020-08-22 19:48:20,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:20,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-08-22 19:48:20,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13585752] [2020-08-22 19:48:20,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-22 19:48:20,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:20,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-22 19:48:20,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1704, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 19:48:20,994 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 43 states. [2020-08-22 19:48:22,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:22,821 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2020-08-22 19:48:22,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 19:48:22,822 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 188 [2020-08-22 19:48:22,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:22,823 INFO L225 Difference]: With dead ends: 208 [2020-08-22 19:48:22,823 INFO L226 Difference]: Without dead ends: 201 [2020-08-22 19:48:22,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1554 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=282, Invalid=5880, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 19:48:22,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-08-22 19:48:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-08-22 19:48:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-22 19:48:22,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2020-08-22 19:48:22,853 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 188 [2020-08-22 19:48:22,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:22,853 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2020-08-22 19:48:22,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-22 19:48:22,854 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2020-08-22 19:48:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-08-22 19:48:22,855 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:22,855 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] [2020-08-22 19:48:22,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 19:48:22,855 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:22,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:22,856 INFO L82 PathProgramCache]: Analyzing trace with hash -143134912, now seen corresponding path program 20 times [2020-08-22 19:48:22,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:22,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741070318] [2020-08-22 19:48:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:22,860 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:23,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:23,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:23,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741070318] [2020-08-22 19:48:23,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:23,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-08-22 19:48:23,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742744815] [2020-08-22 19:48:23,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 19:48:23,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:23,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 19:48:23,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-08-22 19:48:23,304 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 24 states. [2020-08-22 19:48:23,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:23,861 INFO L93 Difference]: Finished difference Result 230 states and 234 transitions. [2020-08-22 19:48:23,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-22 19:48:23,862 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 195 [2020-08-22 19:48:23,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:23,863 INFO L225 Difference]: With dead ends: 230 [2020-08-22 19:48:23,863 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 19:48:23,864 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 [2020-08-22 19:48:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 19:48:23,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 204. [2020-08-22 19:48:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 19:48:23,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2020-08-22 19:48:23,904 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 195 [2020-08-22 19:48:23,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:23,904 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2020-08-22 19:48:23,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 19:48:23,905 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2020-08-22 19:48:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-08-22 19:48:23,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:23,906 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] [2020-08-22 19:48:23,907 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 19:48:23,907 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:23,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:23,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1492038333, now seen corresponding path program 20 times [2020-08-22 19:48:23,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:23,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151868080] [2020-08-22 19:48:23,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:23,918 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:25,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:25,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:25,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151868080] [2020-08-22 19:48:25,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:25,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-08-22 19:48:25,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978858239] [2020-08-22 19:48:25,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-22 19:48:25,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:25,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-22 19:48:25,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1873, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 19:48:25,057 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 45 states. [2020-08-22 19:48:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:27,047 INFO L93 Difference]: Finished difference Result 217 states and 218 transitions. [2020-08-22 19:48:27,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-08-22 19:48:27,048 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 197 [2020-08-22 19:48:27,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:27,050 INFO L225 Difference]: With dead ends: 217 [2020-08-22 19:48:27,050 INFO L226 Difference]: Without dead ends: 210 [2020-08-22 19:48:27,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1735 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=297, Invalid=6509, Unknown=0, NotChecked=0, Total=6806 [2020-08-22 19:48:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-22 19:48:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-08-22 19:48:27,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-08-22 19:48:27,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2020-08-22 19:48:27,082 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 197 [2020-08-22 19:48:27,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:27,082 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2020-08-22 19:48:27,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-22 19:48:27,082 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2020-08-22 19:48:27,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-08-22 19:48:27,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:27,084 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] [2020-08-22 19:48:27,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 19:48:27,084 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:27,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:27,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1864644010, now seen corresponding path program 21 times [2020-08-22 19:48:27,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:27,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1462409059] [2020-08-22 19:48:27,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:27,090 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:27,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:27,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:27,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:27,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1462409059] [2020-08-22 19:48:27,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:27,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-08-22 19:48:27,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397748067] [2020-08-22 19:48:27,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 19:48:27,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:27,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 19:48:27,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-08-22 19:48:27,497 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand 25 states. [2020-08-22 19:48:28,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:28,116 INFO L93 Difference]: Finished difference Result 239 states and 243 transitions. [2020-08-22 19:48:28,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 19:48:28,116 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 204 [2020-08-22 19:48:28,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:28,118 INFO L225 Difference]: With dead ends: 239 [2020-08-22 19:48:28,118 INFO L226 Difference]: Without dead ends: 223 [2020-08-22 19:48:28,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 19:48:28,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-22 19:48:28,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 213. [2020-08-22 19:48:28,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-08-22 19:48:28,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2020-08-22 19:48:28,152 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 204 [2020-08-22 19:48:28,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:28,153 INFO L479 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2020-08-22 19:48:28,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 19:48:28,153 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2020-08-22 19:48:28,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-08-22 19:48:28,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:28,154 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] [2020-08-22 19:48:28,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 19:48:28,154 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:28,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:28,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1995094745, now seen corresponding path program 21 times [2020-08-22 19:48:28,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:28,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334321529] [2020-08-22 19:48:28,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:28,165 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:29,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:29,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:29,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334321529] [2020-08-22 19:48:29,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:29,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-08-22 19:48:29,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952710674] [2020-08-22 19:48:29,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-22 19:48:29,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:29,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-22 19:48:29,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2050, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 19:48:29,527 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand 47 states. [2020-08-22 19:48:31,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:31,730 INFO L93 Difference]: Finished difference Result 226 states and 227 transitions. [2020-08-22 19:48:31,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-08-22 19:48:31,731 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 206 [2020-08-22 19:48:31,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:31,733 INFO L225 Difference]: With dead ends: 226 [2020-08-22 19:48:31,733 INFO L226 Difference]: Without dead ends: 219 [2020-08-22 19:48:31,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1926 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=312, Invalid=7170, Unknown=0, NotChecked=0, Total=7482 [2020-08-22 19:48:31,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-22 19:48:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2020-08-22 19:48:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-08-22 19:48:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2020-08-22 19:48:31,779 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 206 [2020-08-22 19:48:31,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:31,779 INFO L479 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2020-08-22 19:48:31,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-22 19:48:31,779 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2020-08-22 19:48:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-08-22 19:48:31,781 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:31,781 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] [2020-08-22 19:48:31,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 19:48:31,781 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:31,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1460795392, now seen corresponding path program 22 times [2020-08-22 19:48:31,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:31,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686130453] [2020-08-22 19:48:31,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:31,791 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:31,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:32,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:32,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:32,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686130453] [2020-08-22 19:48:32,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:32,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-08-22 19:48:32,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738785394] [2020-08-22 19:48:32,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 19:48:32,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:32,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 19:48:32,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-08-22 19:48:32,304 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand 26 states. [2020-08-22 19:48:32,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:32,938 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2020-08-22 19:48:32,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-22 19:48:32,938 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 213 [2020-08-22 19:48:32,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:32,940 INFO L225 Difference]: With dead ends: 248 [2020-08-22 19:48:32,941 INFO L226 Difference]: Without dead ends: 232 [2020-08-22 19:48:32,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 19:48:32,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-22 19:48:32,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 222. [2020-08-22 19:48:32,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-08-22 19:48:32,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2020-08-22 19:48:32,980 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 213 [2020-08-22 19:48:32,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:32,981 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2020-08-22 19:48:32,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 19:48:32,981 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2020-08-22 19:48:32,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-08-22 19:48:32,982 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:32,982 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] [2020-08-22 19:48:32,982 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 19:48:32,982 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:32,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:32,982 INFO L82 PathProgramCache]: Analyzing trace with hash -748407293, now seen corresponding path program 22 times [2020-08-22 19:48:32,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:32,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471134918] [2020-08-22 19:48:32,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:32,987 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:34,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:34,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:34,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471134918] [2020-08-22 19:48:34,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:34,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-08-22 19:48:34,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31303199] [2020-08-22 19:48:34,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-22 19:48:34,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:34,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-22 19:48:34,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=2235, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 19:48:34,415 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand 49 states. [2020-08-22 19:48:36,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:36,886 INFO L93 Difference]: Finished difference Result 235 states and 236 transitions. [2020-08-22 19:48:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-08-22 19:48:36,887 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 215 [2020-08-22 19:48:36,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:36,888 INFO L225 Difference]: With dead ends: 235 [2020-08-22 19:48:36,889 INFO L226 Difference]: Without dead ends: 228 [2020-08-22 19:48:36,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2127 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=327, Invalid=7863, Unknown=0, NotChecked=0, Total=8190 [2020-08-22 19:48:36,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-08-22 19:48:36,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 225. [2020-08-22 19:48:36,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-08-22 19:48:36,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2020-08-22 19:48:36,931 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 215 [2020-08-22 19:48:36,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:36,932 INFO L479 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2020-08-22 19:48:36,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-22 19:48:36,932 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2020-08-22 19:48:36,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-08-22 19:48:36,933 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:36,934 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] [2020-08-22 19:48:36,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 19:48:36,934 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:36,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:36,934 INFO L82 PathProgramCache]: Analyzing trace with hash 1037404566, now seen corresponding path program 23 times [2020-08-22 19:48:36,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:36,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854184818] [2020-08-22 19:48:36,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:36,941 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:37,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:37,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854184818] [2020-08-22 19:48:37,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:37,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-08-22 19:48:37,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377434192] [2020-08-22 19:48:37,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 19:48:37,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:37,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 19:48:37,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-08-22 19:48:37,411 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand 27 states. [2020-08-22 19:48:38,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:38,124 INFO L93 Difference]: Finished difference Result 257 states and 261 transitions. [2020-08-22 19:48:38,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-22 19:48:38,124 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 222 [2020-08-22 19:48:38,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:38,126 INFO L225 Difference]: With dead ends: 257 [2020-08-22 19:48:38,127 INFO L226 Difference]: Without dead ends: 241 [2020-08-22 19:48:38,128 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 [2020-08-22 19:48:38,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-22 19:48:38,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 231. [2020-08-22 19:48:38,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-08-22 19:48:38,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2020-08-22 19:48:38,177 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 222 [2020-08-22 19:48:38,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:38,177 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2020-08-22 19:48:38,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 19:48:38,177 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2020-08-22 19:48:38,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-08-22 19:48:38,178 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:38,178 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] [2020-08-22 19:48:38,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 19:48:38,178 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:38,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:38,179 INFO L82 PathProgramCache]: Analyzing trace with hash -864966119, now seen corresponding path program 23 times [2020-08-22 19:48:38,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:38,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456496468] [2020-08-22 19:48:38,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:38,184 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:38,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:39,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:39,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:39,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:39,758 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456496468] [2020-08-22 19:48:39,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:39,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-08-22 19:48:39,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742216225] [2020-08-22 19:48:39,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-22 19:48:39,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:39,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-22 19:48:39,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2428, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 19:48:39,760 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand 51 states. [2020-08-22 19:48:42,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:42,418 INFO L93 Difference]: Finished difference Result 244 states and 245 transitions. [2020-08-22 19:48:42,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-08-22 19:48:42,418 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 224 [2020-08-22 19:48:42,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:42,420 INFO L225 Difference]: With dead ends: 244 [2020-08-22 19:48:42,420 INFO L226 Difference]: Without dead ends: 237 [2020-08-22 19:48:42,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2338 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=342, Invalid=8588, Unknown=0, NotChecked=0, Total=8930 [2020-08-22 19:48:42,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-08-22 19:48:42,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 234. [2020-08-22 19:48:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-08-22 19:48:42,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2020-08-22 19:48:42,470 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 224 [2020-08-22 19:48:42,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:42,471 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2020-08-22 19:48:42,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-22 19:48:42,471 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2020-08-22 19:48:42,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-08-22 19:48:42,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:42,472 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] [2020-08-22 19:48:42,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 19:48:42,472 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:42,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:42,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1641509056, now seen corresponding path program 24 times [2020-08-22 19:48:42,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:42,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611828623] [2020-08-22 19:48:42,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:42,476 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:42,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:43,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:43,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611828623] [2020-08-22 19:48:43,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:43,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-08-22 19:48:43,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127588379] [2020-08-22 19:48:43,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 19:48:43,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:43,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 19:48:43,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-08-22 19:48:43,015 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand 28 states. [2020-08-22 19:48:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:43,769 INFO L93 Difference]: Finished difference Result 266 states and 270 transitions. [2020-08-22 19:48:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-22 19:48:43,770 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 231 [2020-08-22 19:48:43,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:43,772 INFO L225 Difference]: With dead ends: 266 [2020-08-22 19:48:43,772 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 19:48:43,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 19:48:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 19:48:43,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 240. [2020-08-22 19:48:43,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-08-22 19:48:43,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2020-08-22 19:48:43,808 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 231 [2020-08-22 19:48:43,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:43,808 INFO L479 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2020-08-22 19:48:43,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 19:48:43,808 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2020-08-22 19:48:43,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-08-22 19:48:43,809 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:43,809 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] [2020-08-22 19:48:43,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 19:48:43,810 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:43,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:43,810 INFO L82 PathProgramCache]: Analyzing trace with hash -141136189, now seen corresponding path program 24 times [2020-08-22 19:48:43,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:43,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886159064] [2020-08-22 19:48:43,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:43,814 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:45,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:45,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:45,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886159064] [2020-08-22 19:48:45,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:45,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2020-08-22 19:48:45,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443614673] [2020-08-22 19:48:45,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-22 19:48:45,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:45,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-22 19:48:45,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2629, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 19:48:45,698 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand 53 states. [2020-08-22 19:48:48,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:48,595 INFO L93 Difference]: Finished difference Result 253 states and 254 transitions. [2020-08-22 19:48:48,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-08-22 19:48:48,596 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 233 [2020-08-22 19:48:48,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:48,599 INFO L225 Difference]: With dead ends: 253 [2020-08-22 19:48:48,599 INFO L226 Difference]: Without dead ends: 246 [2020-08-22 19:48:48,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=357, Invalid=9345, Unknown=0, NotChecked=0, Total=9702 [2020-08-22 19:48:48,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-08-22 19:48:48,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-08-22 19:48:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-08-22 19:48:48,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2020-08-22 19:48:48,638 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 233 [2020-08-22 19:48:48,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:48,639 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2020-08-22 19:48:48,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-22 19:48:48,639 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2020-08-22 19:48:48,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-08-22 19:48:48,640 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:48,641 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] [2020-08-22 19:48:48,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 19:48:48,641 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:48,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:48,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2011825962, now seen corresponding path program 25 times [2020-08-22 19:48:48,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:48,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370979366] [2020-08-22 19:48:48,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:48,654 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:49,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:49,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370979366] [2020-08-22 19:48:49,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:49,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-08-22 19:48:49,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865569101] [2020-08-22 19:48:49,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 19:48:49,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:49,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 19:48:49,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-08-22 19:48:49,222 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand 29 states. [2020-08-22 19:48:50,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:50,022 INFO L93 Difference]: Finished difference Result 275 states and 279 transitions. [2020-08-22 19:48:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 19:48:50,023 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 240 [2020-08-22 19:48:50,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:50,025 INFO L225 Difference]: With dead ends: 275 [2020-08-22 19:48:50,025 INFO L226 Difference]: Without dead ends: 259 [2020-08-22 19:48:50,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 19:48:50,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-22 19:48:50,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 249. [2020-08-22 19:48:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-08-22 19:48:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2020-08-22 19:48:50,066 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 240 [2020-08-22 19:48:50,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:50,066 INFO L479 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2020-08-22 19:48:50,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 19:48:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2020-08-22 19:48:50,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-08-22 19:48:50,068 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:50,068 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] [2020-08-22 19:48:50,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 19:48:50,068 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:50,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:50,069 INFO L82 PathProgramCache]: Analyzing trace with hash -2007807655, now seen corresponding path program 25 times [2020-08-22 19:48:50,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:50,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457898729] [2020-08-22 19:48:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:50,079 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:51,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:51,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457898729] [2020-08-22 19:48:51,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:51,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2020-08-22 19:48:51,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831824213] [2020-08-22 19:48:51,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-22 19:48:51,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:51,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-22 19:48:51,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2838, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 19:48:51,830 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand 55 states. [2020-08-22 19:48:54,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:54,991 INFO L93 Difference]: Finished difference Result 262 states and 263 transitions. [2020-08-22 19:48:54,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-08-22 19:48:54,993 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 242 [2020-08-22 19:48:54,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:54,995 INFO L225 Difference]: With dead ends: 262 [2020-08-22 19:48:54,996 INFO L226 Difference]: Without dead ends: 255 [2020-08-22 19:48:54,997 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2790 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=372, Invalid=10134, Unknown=0, NotChecked=0, Total=10506 [2020-08-22 19:48:54,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-08-22 19:48:55,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2020-08-22 19:48:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-08-22 19:48:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2020-08-22 19:48:55,039 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 242 [2020-08-22 19:48:55,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:55,040 INFO L479 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2020-08-22 19:48:55,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-22 19:48:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2020-08-22 19:48:55,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-08-22 19:48:55,041 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:55,041 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] [2020-08-22 19:48:55,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 19:48:55,041 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:55,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:55,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1979700864, now seen corresponding path program 26 times [2020-08-22 19:48:55,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:55,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308827869] [2020-08-22 19:48:55,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:55,046 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:55,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:55,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:55,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:55,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308827869] [2020-08-22 19:48:55,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:55,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-08-22 19:48:55,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77314411] [2020-08-22 19:48:55,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 19:48:55,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:55,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 19:48:55,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-08-22 19:48:55,689 INFO L87 Difference]: Start difference. First operand 252 states and 253 transitions. Second operand 30 states. [2020-08-22 19:48:56,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:48:56,628 INFO L93 Difference]: Finished difference Result 284 states and 288 transitions. [2020-08-22 19:48:56,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-08-22 19:48:56,633 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 249 [2020-08-22 19:48:56,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:48:56,636 INFO L225 Difference]: With dead ends: 284 [2020-08-22 19:48:56,636 INFO L226 Difference]: Without dead ends: 268 [2020-08-22 19:48:56,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 19:48:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-22 19:48:56,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 258. [2020-08-22 19:48:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-08-22 19:48:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 259 transitions. [2020-08-22 19:48:56,695 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 259 transitions. Word has length 249 [2020-08-22 19:48:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:48:56,696 INFO L479 AbstractCegarLoop]: Abstraction has 258 states and 259 transitions. [2020-08-22 19:48:56,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 19:48:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 259 transitions. [2020-08-22 19:48:56,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-08-22 19:48:56,698 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:48:56,698 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] [2020-08-22 19:48:56,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 19:48:56,698 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:48:56,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:48:56,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1200359549, now seen corresponding path program 26 times [2020-08-22 19:48:56,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:48:56,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116986367] [2020-08-22 19:48:56,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:48:56,711 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:48:56,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:58,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:48:58,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:48:58,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:48:58,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116986367] [2020-08-22 19:48:58,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:48:58,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2020-08-22 19:48:58,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651890165] [2020-08-22 19:48:58,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-08-22 19:48:58,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:48:58,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-08-22 19:48:58,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=3055, Unknown=0, NotChecked=0, Total=3192 [2020-08-22 19:48:58,768 INFO L87 Difference]: Start difference. First operand 258 states and 259 transitions. Second operand 57 states. [2020-08-22 19:49:02,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:02,350 INFO L93 Difference]: Finished difference Result 271 states and 272 transitions. [2020-08-22 19:49:02,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-08-22 19:49:02,351 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 251 [2020-08-22 19:49:02,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:02,355 INFO L225 Difference]: With dead ends: 271 [2020-08-22 19:49:02,355 INFO L226 Difference]: Without dead ends: 264 [2020-08-22 19:49:02,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3031 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=387, Invalid=10955, Unknown=0, NotChecked=0, Total=11342 [2020-08-22 19:49:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-22 19:49:02,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 261. [2020-08-22 19:49:02,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-08-22 19:49:02,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 262 transitions. [2020-08-22 19:49:02,400 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 262 transitions. Word has length 251 [2020-08-22 19:49:02,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:02,400 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 262 transitions. [2020-08-22 19:49:02,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-08-22 19:49:02,400 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 262 transitions. [2020-08-22 19:49:02,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-08-22 19:49:02,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:02,402 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] [2020-08-22 19:49:02,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 19:49:02,402 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:02,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:02,403 INFO L82 PathProgramCache]: Analyzing trace with hash 223418390, now seen corresponding path program 27 times [2020-08-22 19:49:02,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:02,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054876237] [2020-08-22 19:49:02,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:02,414 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:04,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:04,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054876237] [2020-08-22 19:49:04,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:04,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2020-08-22 19:49:04,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964921708] [2020-08-22 19:49:04,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-08-22 19:49:04,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:04,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-08-22 19:49:04,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=3280, Unknown=0, NotChecked=0, Total=3422 [2020-08-22 19:49:04,692 INFO L87 Difference]: Start difference. First operand 261 states and 262 transitions. Second operand 59 states. [2020-08-22 19:49:08,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:08,611 INFO L93 Difference]: Finished difference Result 280 states and 282 transitions. [2020-08-22 19:49:08,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-08-22 19:49:08,612 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 258 [2020-08-22 19:49:08,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:08,615 INFO L225 Difference]: With dead ends: 280 [2020-08-22 19:49:08,615 INFO L226 Difference]: Without dead ends: 273 [2020-08-22 19:49:08,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=402, Invalid=11808, Unknown=0, NotChecked=0, Total=12210 [2020-08-22 19:49:08,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-08-22 19:49:08,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 270. [2020-08-22 19:49:08,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-08-22 19:49:08,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 272 transitions. [2020-08-22 19:49:08,673 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 272 transitions. Word has length 258 [2020-08-22 19:49:08,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:08,674 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 272 transitions. [2020-08-22 19:49:08,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-08-22 19:49:08,674 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 272 transitions. [2020-08-22 19:49:08,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-08-22 19:49:08,675 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:08,675 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] [2020-08-22 19:49:08,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 19:49:08,675 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:08,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:08,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1044595677, now seen corresponding path program 28 times [2020-08-22 19:49:08,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:08,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079219706] [2020-08-22 19:49:08,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:08,681 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:08,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:08,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079219706] [2020-08-22 19:49:08,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:08,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:49:08,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081964014] [2020-08-22 19:49:08,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:49:08,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:08,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:49:08,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:49:08,783 INFO L87 Difference]: Start difference. First operand 270 states and 272 transitions. Second operand 3 states. [2020-08-22 19:49:08,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:08,866 INFO L93 Difference]: Finished difference Result 288 states and 292 transitions. [2020-08-22 19:49:08,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:49:08,866 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 265 [2020-08-22 19:49:08,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:08,869 INFO L225 Difference]: With dead ends: 288 [2020-08-22 19:49:08,869 INFO L226 Difference]: Without dead ends: 271 [2020-08-22 19:49:08,870 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 [2020-08-22 19:49:08,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-08-22 19:49:08,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2020-08-22 19:49:08,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-22 19:49:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2020-08-22 19:49:08,921 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 265 [2020-08-22 19:49:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:08,921 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2020-08-22 19:49:08,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:49:08,922 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2020-08-22 19:49:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-08-22 19:49:08,923 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:08,924 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] [2020-08-22 19:49:08,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 19:49:08,924 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:08,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1372310976, now seen corresponding path program 29 times [2020-08-22 19:49:08,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:08,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240303925] [2020-08-22 19:49:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:08,936 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:09,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:09,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240303925] [2020-08-22 19:49:09,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:09,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-08-22 19:49:09,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085437215] [2020-08-22 19:49:09,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 19:49:09,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:09,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 19:49:09,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-08-22 19:49:09,685 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 32 states. [2020-08-22 19:49:10,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:10,806 INFO L93 Difference]: Finished difference Result 295 states and 297 transitions. [2020-08-22 19:49:10,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-08-22 19:49:10,807 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 267 [2020-08-22 19:49:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:10,810 INFO L225 Difference]: With dead ends: 295 [2020-08-22 19:49:10,810 INFO L226 Difference]: Without dead ends: 287 [2020-08-22 19:49:10,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 19:49:10,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-08-22 19:49:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 277. [2020-08-22 19:49:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-08-22 19:49:10,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2020-08-22 19:49:10,854 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 267 [2020-08-22 19:49:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:10,854 INFO L479 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2020-08-22 19:49:10,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 19:49:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2020-08-22 19:49:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-08-22 19:49:10,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:10,856 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] [2020-08-22 19:49:10,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 19:49:10,857 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:10,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:10,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1614229437, now seen corresponding path program 27 times [2020-08-22 19:49:10,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:10,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232133232] [2020-08-22 19:49:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:10,864 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:13,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:13,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:13,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:13,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232133232] [2020-08-22 19:49:13,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:13,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2020-08-22 19:49:13,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993128840] [2020-08-22 19:49:13,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-08-22 19:49:13,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:13,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-08-22 19:49:13,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=3513, Unknown=0, NotChecked=0, Total=3660 [2020-08-22 19:49:13,310 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand 61 states. [2020-08-22 19:49:17,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:17,521 INFO L93 Difference]: Finished difference Result 290 states and 291 transitions. [2020-08-22 19:49:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-08-22 19:49:17,522 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 269 [2020-08-22 19:49:17,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:17,524 INFO L225 Difference]: With dead ends: 290 [2020-08-22 19:49:17,524 INFO L226 Difference]: Without dead ends: 283 [2020-08-22 19:49:17,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3543 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=417, Invalid=12693, Unknown=0, NotChecked=0, Total=13110 [2020-08-22 19:49:17,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-08-22 19:49:17,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 280. [2020-08-22 19:49:17,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-22 19:49:17,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 281 transitions. [2020-08-22 19:49:17,573 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 281 transitions. Word has length 269 [2020-08-22 19:49:17,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:17,573 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 281 transitions. [2020-08-22 19:49:17,573 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-08-22 19:49:17,573 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 281 transitions. [2020-08-22 19:49:17,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-08-22 19:49:17,574 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:17,574 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] [2020-08-22 19:49:17,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 19:49:17,575 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:17,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:17,575 INFO L82 PathProgramCache]: Analyzing trace with hash -432347306, now seen corresponding path program 30 times [2020-08-22 19:49:17,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:17,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746470769] [2020-08-22 19:49:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:17,579 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:18,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:18,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746470769] [2020-08-22 19:49:18,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:18,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-08-22 19:49:18,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537689656] [2020-08-22 19:49:18,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 19:49:18,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:18,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 19:49:18,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 19:49:18,374 INFO L87 Difference]: Start difference. First operand 280 states and 281 transitions. Second operand 33 states. [2020-08-22 19:49:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:19,516 INFO L93 Difference]: Finished difference Result 304 states and 306 transitions. [2020-08-22 19:49:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-08-22 19:49:19,516 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 276 [2020-08-22 19:49:19,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:19,518 INFO L225 Difference]: With dead ends: 304 [2020-08-22 19:49:19,519 INFO L226 Difference]: Without dead ends: 296 [2020-08-22 19:49:19,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 19:49:19,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-08-22 19:49:19,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 286. [2020-08-22 19:49:19,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 286 states. [2020-08-22 19:49:19,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2020-08-22 19:49:19,571 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 276 [2020-08-22 19:49:19,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:19,571 INFO L479 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2020-08-22 19:49:19,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 19:49:19,571 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2020-08-22 19:49:19,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-08-22 19:49:19,572 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:19,573 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] [2020-08-22 19:49:19,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 19:49:19,573 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:19,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:19,573 INFO L82 PathProgramCache]: Analyzing trace with hash -252274727, now seen corresponding path program 28 times [2020-08-22 19:49:19,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:19,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142016402] [2020-08-22 19:49:19,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:19,577 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:21,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:22,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142016402] [2020-08-22 19:49:22,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:22,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2020-08-22 19:49:22,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313218020] [2020-08-22 19:49:22,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-08-22 19:49:22,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:22,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-08-22 19:49:22,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=3754, Unknown=0, NotChecked=0, Total=3906 [2020-08-22 19:49:22,064 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand 63 states. [2020-08-22 19:49:26,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:26,558 INFO L93 Difference]: Finished difference Result 299 states and 300 transitions. [2020-08-22 19:49:26,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-08-22 19:49:26,559 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 278 [2020-08-22 19:49:26,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:26,561 INFO L225 Difference]: With dead ends: 299 [2020-08-22 19:49:26,561 INFO L226 Difference]: Without dead ends: 292 [2020-08-22 19:49:26,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3814 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=432, Invalid=13610, Unknown=0, NotChecked=0, Total=14042 [2020-08-22 19:49:26,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-22 19:49:26,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2020-08-22 19:49:26,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-08-22 19:49:26,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2020-08-22 19:49:26,635 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 278 [2020-08-22 19:49:26,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:26,635 INFO L479 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2020-08-22 19:49:26,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-08-22 19:49:26,635 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2020-08-22 19:49:26,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-08-22 19:49:26,637 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:26,637 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] [2020-08-22 19:49:26,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 19:49:26,638 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:26,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:26,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1077906176, now seen corresponding path program 31 times [2020-08-22 19:49:26,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:26,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758675950] [2020-08-22 19:49:26,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:26,644 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:27,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:27,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:27,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758675950] [2020-08-22 19:49:27,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:27,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-08-22 19:49:27,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452432601] [2020-08-22 19:49:27,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 19:49:27,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:27,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 19:49:27,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 19:49:27,554 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand 34 states. [2020-08-22 19:49:28,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:28,816 INFO L93 Difference]: Finished difference Result 313 states and 315 transitions. [2020-08-22 19:49:28,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-08-22 19:49:28,816 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 285 [2020-08-22 19:49:28,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:28,819 INFO L225 Difference]: With dead ends: 313 [2020-08-22 19:49:28,819 INFO L226 Difference]: Without dead ends: 305 [2020-08-22 19:49:28,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2020-08-22 19:49:28,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-08-22 19:49:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 295. [2020-08-22 19:49:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-08-22 19:49:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2020-08-22 19:49:28,870 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 285 [2020-08-22 19:49:28,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:28,871 INFO L479 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2020-08-22 19:49:28,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 19:49:28,871 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2020-08-22 19:49:28,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-08-22 19:49:28,872 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:28,872 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] [2020-08-22 19:49:28,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-22 19:49:28,873 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:28,873 INFO L82 PathProgramCache]: Analyzing trace with hash -597624573, now seen corresponding path program 29 times [2020-08-22 19:49:28,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:28,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295180413] [2020-08-22 19:49:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:28,879 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:31,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:31,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295180413] [2020-08-22 19:49:31,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:31,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2020-08-22 19:49:31,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670610140] [2020-08-22 19:49:31,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-08-22 19:49:31,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:31,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-08-22 19:49:31,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=4003, Unknown=0, NotChecked=0, Total=4160 [2020-08-22 19:49:31,882 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 65 states. [2020-08-22 19:49:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:36,850 INFO L93 Difference]: Finished difference Result 308 states and 309 transitions. [2020-08-22 19:49:36,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-08-22 19:49:36,851 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 287 [2020-08-22 19:49:36,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:36,853 INFO L225 Difference]: With dead ends: 308 [2020-08-22 19:49:36,853 INFO L226 Difference]: Without dead ends: 301 [2020-08-22 19:49:36,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=447, Invalid=14559, Unknown=0, NotChecked=0, Total=15006 [2020-08-22 19:49:36,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-08-22 19:49:36,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 298. [2020-08-22 19:49:36,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-08-22 19:49:36,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 299 transitions. [2020-08-22 19:49:36,938 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 299 transitions. Word has length 287 [2020-08-22 19:49:36,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:36,939 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 299 transitions. [2020-08-22 19:49:36,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-08-22 19:49:36,939 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 299 transitions. [2020-08-22 19:49:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2020-08-22 19:49:36,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:36,941 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] [2020-08-22 19:49:36,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-22 19:49:36,941 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:36,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:36,942 INFO L82 PathProgramCache]: Analyzing trace with hash -427333994, now seen corresponding path program 32 times [2020-08-22 19:49:36,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:36,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152953925] [2020-08-22 19:49:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:36,949 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:36,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:37,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:37,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:37,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152953925] [2020-08-22 19:49:37,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:37,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-08-22 19:49:37,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333331852] [2020-08-22 19:49:37,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 19:49:37,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:37,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 19:49:37,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 19:49:37,979 INFO L87 Difference]: Start difference. First operand 298 states and 299 transitions. Second operand 35 states. [2020-08-22 19:49:39,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:39,468 INFO L93 Difference]: Finished difference Result 322 states and 324 transitions. [2020-08-22 19:49:39,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-08-22 19:49:39,469 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 294 [2020-08-22 19:49:39,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:39,473 INFO L225 Difference]: With dead ends: 322 [2020-08-22 19:49:39,473 INFO L226 Difference]: Without dead ends: 314 [2020-08-22 19:49:39,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2020-08-22 19:49:39,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-08-22 19:49:39,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 304. [2020-08-22 19:49:39,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-22 19:49:39,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 305 transitions. [2020-08-22 19:49:39,554 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 305 transitions. Word has length 294 [2020-08-22 19:49:39,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:39,554 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 305 transitions. [2020-08-22 19:49:39,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 19:49:39,555 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 305 transitions. [2020-08-22 19:49:39,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-08-22 19:49:39,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:39,557 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] [2020-08-22 19:49:39,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-08-22 19:49:39,557 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:39,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:39,557 INFO L82 PathProgramCache]: Analyzing trace with hash 270550809, now seen corresponding path program 30 times [2020-08-22 19:49:39,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:39,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804165474] [2020-08-22 19:49:39,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:39,568 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:42,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:42,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804165474] [2020-08-22 19:49:42,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:42,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2020-08-22 19:49:42,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110630382] [2020-08-22 19:49:42,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-08-22 19:49:42,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:42,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-08-22 19:49:42,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=4260, Unknown=0, NotChecked=0, Total=4422 [2020-08-22 19:49:42,921 INFO L87 Difference]: Start difference. First operand 304 states and 305 transitions. Second operand 67 states. [2020-08-22 19:49:48,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:48,219 INFO L93 Difference]: Finished difference Result 317 states and 318 transitions. [2020-08-22 19:49:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-08-22 19:49:48,220 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 296 [2020-08-22 19:49:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:48,222 INFO L225 Difference]: With dead ends: 317 [2020-08-22 19:49:48,222 INFO L226 Difference]: Without dead ends: 310 [2020-08-22 19:49:48,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4386 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=462, Invalid=15540, Unknown=0, NotChecked=0, Total=16002 [2020-08-22 19:49:48,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-08-22 19:49:48,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 307. [2020-08-22 19:49:48,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-08-22 19:49:48,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2020-08-22 19:49:48,288 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 296 [2020-08-22 19:49:48,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:48,288 INFO L479 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2020-08-22 19:49:48,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-08-22 19:49:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2020-08-22 19:49:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-08-22 19:49:48,290 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:48,291 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] [2020-08-22 19:49:48,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-08-22 19:49:48,291 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:48,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:48,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1458451392, now seen corresponding path program 33 times [2020-08-22 19:49:48,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:48,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231441910] [2020-08-22 19:49:48,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:48,302 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:49,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:49,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:49,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231441910] [2020-08-22 19:49:49,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:49,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-08-22 19:49:49,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631964206] [2020-08-22 19:49:49,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 19:49:49,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:49,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 19:49:49,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 19:49:49,381 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 36 states. [2020-08-22 19:49:50,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:49:50,950 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2020-08-22 19:49:50,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-08-22 19:49:50,951 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 303 [2020-08-22 19:49:50,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:49:50,955 INFO L225 Difference]: With dead ends: 331 [2020-08-22 19:49:50,955 INFO L226 Difference]: Without dead ends: 323 [2020-08-22 19:49:50,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 19:49:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-08-22 19:49:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 313. [2020-08-22 19:49:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-08-22 19:49:51,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2020-08-22 19:49:51,037 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 303 [2020-08-22 19:49:51,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:49:51,037 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2020-08-22 19:49:51,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 19:49:51,037 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2020-08-22 19:49:51,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-08-22 19:49:51,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:49:51,040 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] [2020-08-22 19:49:51,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-08-22 19:49:51,040 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:49:51,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:49:51,040 INFO L82 PathProgramCache]: Analyzing trace with hash 34107843, now seen corresponding path program 31 times [2020-08-22 19:49:51,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:49:51,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712513206] [2020-08-22 19:49:51,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:49:51,049 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:49:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:54,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:49:54,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:49:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:49:54,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712513206] [2020-08-22 19:49:54,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:49:54,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2020-08-22 19:49:54,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376586702] [2020-08-22 19:49:54,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-08-22 19:49:54,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:49:54,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-08-22 19:49:54,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=4525, Unknown=0, NotChecked=0, Total=4692 [2020-08-22 19:49:54,627 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand 69 states. [2020-08-22 19:50:00,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:00,299 INFO L93 Difference]: Finished difference Result 326 states and 327 transitions. [2020-08-22 19:50:00,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-08-22 19:50:00,301 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 305 [2020-08-22 19:50:00,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:00,303 INFO L225 Difference]: With dead ends: 326 [2020-08-22 19:50:00,303 INFO L226 Difference]: Without dead ends: 319 [2020-08-22 19:50:00,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4687 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=477, Invalid=16553, Unknown=0, NotChecked=0, Total=17030 [2020-08-22 19:50:00,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-08-22 19:50:00,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 316. [2020-08-22 19:50:00,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 316 states. [2020-08-22 19:50:00,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 317 transitions. [2020-08-22 19:50:00,368 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 317 transitions. Word has length 305 [2020-08-22 19:50:00,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:00,369 INFO L479 AbstractCegarLoop]: Abstraction has 316 states and 317 transitions. [2020-08-22 19:50:00,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-08-22 19:50:00,369 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 317 transitions. [2020-08-22 19:50:00,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-08-22 19:50:00,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:00,371 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] [2020-08-22 19:50:00,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-08-22 19:50:00,371 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:00,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:00,371 INFO L82 PathProgramCache]: Analyzing trace with hash -588605994, now seen corresponding path program 34 times [2020-08-22 19:50:00,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:00,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847337799] [2020-08-22 19:50:00,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:00,376 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:00,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:01,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:01,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:01,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847337799] [2020-08-22 19:50:01,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:01,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-08-22 19:50:01,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610636456] [2020-08-22 19:50:01,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 19:50:01,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:01,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 19:50:01,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 19:50:01,601 INFO L87 Difference]: Start difference. First operand 316 states and 317 transitions. Second operand 37 states. [2020-08-22 19:50:03,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:03,359 INFO L93 Difference]: Finished difference Result 340 states and 342 transitions. [2020-08-22 19:50:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-08-22 19:50:03,361 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 312 [2020-08-22 19:50:03,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:03,363 INFO L225 Difference]: With dead ends: 340 [2020-08-22 19:50:03,363 INFO L226 Difference]: Without dead ends: 332 [2020-08-22 19:50:03,364 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 19:50:03,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-08-22 19:50:03,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 322. [2020-08-22 19:50:03,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-08-22 19:50:03,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 323 transitions. [2020-08-22 19:50:03,435 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 323 transitions. Word has length 312 [2020-08-22 19:50:03,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:03,436 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 323 transitions. [2020-08-22 19:50:03,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 19:50:03,436 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 323 transitions. [2020-08-22 19:50:03,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-08-22 19:50:03,437 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:03,438 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] [2020-08-22 19:50:03,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-08-22 19:50:03,438 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:03,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:03,438 INFO L82 PathProgramCache]: Analyzing trace with hash -93018535, now seen corresponding path program 32 times [2020-08-22 19:50:03,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:03,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818131326] [2020-08-22 19:50:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:03,445 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:07,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:07,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:07,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818131326] [2020-08-22 19:50:07,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:07,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2020-08-22 19:50:07,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807239927] [2020-08-22 19:50:07,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-08-22 19:50:07,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:07,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-08-22 19:50:07,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=4798, Unknown=0, NotChecked=0, Total=4970 [2020-08-22 19:50:07,383 INFO L87 Difference]: Start difference. First operand 322 states and 323 transitions. Second operand 71 states. [2020-08-22 19:50:13,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:13,729 INFO L93 Difference]: Finished difference Result 335 states and 336 transitions. [2020-08-22 19:50:13,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-08-22 19:50:13,732 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 314 [2020-08-22 19:50:13,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:13,734 INFO L225 Difference]: With dead ends: 335 [2020-08-22 19:50:13,734 INFO L226 Difference]: Without dead ends: 328 [2020-08-22 19:50:13,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4998 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=492, Invalid=17598, Unknown=0, NotChecked=0, Total=18090 [2020-08-22 19:50:13,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-08-22 19:50:13,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 325. [2020-08-22 19:50:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-08-22 19:50:13,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2020-08-22 19:50:13,796 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 314 [2020-08-22 19:50:13,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:13,796 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2020-08-22 19:50:13,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-08-22 19:50:13,796 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2020-08-22 19:50:13,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-08-22 19:50:13,797 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:13,797 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] [2020-08-22 19:50:13,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-08-22 19:50:13,797 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:13,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:13,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1846291584, now seen corresponding path program 35 times [2020-08-22 19:50:13,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:13,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832514924] [2020-08-22 19:50:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:13,801 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:14,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:14,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832514924] [2020-08-22 19:50:14,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:14,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-08-22 19:50:14,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942492412] [2020-08-22 19:50:14,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 19:50:14,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:14,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 19:50:14,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 19:50:14,882 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand 38 states. [2020-08-22 19:50:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:16,567 INFO L93 Difference]: Finished difference Result 349 states and 351 transitions. [2020-08-22 19:50:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-08-22 19:50:16,567 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 321 [2020-08-22 19:50:16,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:16,570 INFO L225 Difference]: With dead ends: 349 [2020-08-22 19:50:16,570 INFO L226 Difference]: Without dead ends: 341 [2020-08-22 19:50:16,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2020-08-22 19:50:16,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-08-22 19:50:16,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 331. [2020-08-22 19:50:16,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-08-22 19:50:16,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2020-08-22 19:50:16,646 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 321 [2020-08-22 19:50:16,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:16,646 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2020-08-22 19:50:16,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 19:50:16,646 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2020-08-22 19:50:16,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-08-22 19:50:16,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:16,648 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] [2020-08-22 19:50:16,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-08-22 19:50:16,648 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:16,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:16,648 INFO L82 PathProgramCache]: Analyzing trace with hash -913622397, now seen corresponding path program 33 times [2020-08-22 19:50:16,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:16,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421328937] [2020-08-22 19:50:16,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:16,652 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:20,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:20,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:20,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421328937] [2020-08-22 19:50:20,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:20,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2020-08-22 19:50:20,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752002905] [2020-08-22 19:50:20,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-08-22 19:50:20,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:20,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-08-22 19:50:20,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=5079, Unknown=0, NotChecked=0, Total=5256 [2020-08-22 19:50:20,359 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 73 states. [2020-08-22 19:50:26,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:26,106 INFO L93 Difference]: Finished difference Result 344 states and 345 transitions. [2020-08-22 19:50:26,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-08-22 19:50:26,107 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 323 [2020-08-22 19:50:26,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:26,110 INFO L225 Difference]: With dead ends: 344 [2020-08-22 19:50:26,110 INFO L226 Difference]: Without dead ends: 337 [2020-08-22 19:50:26,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5319 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=507, Invalid=18675, Unknown=0, NotChecked=0, Total=19182 [2020-08-22 19:50:26,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-08-22 19:50:26,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 334. [2020-08-22 19:50:26,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-08-22 19:50:26,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 335 transitions. [2020-08-22 19:50:26,177 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 335 transitions. Word has length 323 [2020-08-22 19:50:26,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:26,177 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 335 transitions. [2020-08-22 19:50:26,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-08-22 19:50:26,177 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 335 transitions. [2020-08-22 19:50:26,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-08-22 19:50:26,178 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:26,179 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] [2020-08-22 19:50:26,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-08-22 19:50:26,179 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:26,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:26,179 INFO L82 PathProgramCache]: Analyzing trace with hash -753371882, now seen corresponding path program 36 times [2020-08-22 19:50:26,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:26,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067977264] [2020-08-22 19:50:26,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:26,183 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:26,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:27,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:27,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:27,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067977264] [2020-08-22 19:50:27,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:27,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-08-22 19:50:27,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573272194] [2020-08-22 19:50:27,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 19:50:27,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:27,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 19:50:27,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 19:50:27,405 INFO L87 Difference]: Start difference. First operand 334 states and 335 transitions. Second operand 39 states. [2020-08-22 19:50:29,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:29,202 INFO L93 Difference]: Finished difference Result 358 states and 360 transitions. [2020-08-22 19:50:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-08-22 19:50:29,203 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 330 [2020-08-22 19:50:29,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:29,206 INFO L225 Difference]: With dead ends: 358 [2020-08-22 19:50:29,206 INFO L226 Difference]: Without dead ends: 350 [2020-08-22 19:50:29,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2020-08-22 19:50:29,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2020-08-22 19:50:29,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 340. [2020-08-22 19:50:29,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 340 states. [2020-08-22 19:50:29,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 341 transitions. [2020-08-22 19:50:29,271 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 341 transitions. Word has length 330 [2020-08-22 19:50:29,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:29,272 INFO L479 AbstractCegarLoop]: Abstraction has 340 states and 341 transitions. [2020-08-22 19:50:29,272 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 19:50:29,272 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 341 transitions. [2020-08-22 19:50:29,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2020-08-22 19:50:29,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:29,273 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] [2020-08-22 19:50:29,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-08-22 19:50:29,273 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:29,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:29,274 INFO L82 PathProgramCache]: Analyzing trace with hash 480753049, now seen corresponding path program 34 times [2020-08-22 19:50:29,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:29,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229577026] [2020-08-22 19:50:29,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:29,278 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:29,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:33,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:33,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:33,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229577026] [2020-08-22 19:50:33,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:33,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2020-08-22 19:50:33,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149039381] [2020-08-22 19:50:33,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-08-22 19:50:33,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:33,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-08-22 19:50:33,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=5368, Unknown=0, NotChecked=0, Total=5550 [2020-08-22 19:50:33,480 INFO L87 Difference]: Start difference. First operand 340 states and 341 transitions. Second operand 75 states. [2020-08-22 19:50:39,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:39,906 INFO L93 Difference]: Finished difference Result 353 states and 354 transitions. [2020-08-22 19:50:39,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-08-22 19:50:39,907 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 332 [2020-08-22 19:50:39,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:39,909 INFO L225 Difference]: With dead ends: 353 [2020-08-22 19:50:39,909 INFO L226 Difference]: Without dead ends: 346 [2020-08-22 19:50:39,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5650 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=522, Invalid=19784, Unknown=0, NotChecked=0, Total=20306 [2020-08-22 19:50:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-08-22 19:50:39,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 343. [2020-08-22 19:50:39,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-08-22 19:50:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2020-08-22 19:50:39,979 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 332 [2020-08-22 19:50:39,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:39,980 INFO L479 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2020-08-22 19:50:39,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-08-22 19:50:39,980 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2020-08-22 19:50:39,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-08-22 19:50:39,981 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:39,981 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] [2020-08-22 19:50:39,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-08-22 19:50:39,981 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:39,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:39,982 INFO L82 PathProgramCache]: Analyzing trace with hash 644183360, now seen corresponding path program 37 times [2020-08-22 19:50:39,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:39,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619947003] [2020-08-22 19:50:39,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:39,986 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:41,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:41,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:41,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619947003] [2020-08-22 19:50:41,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:41,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-08-22 19:50:41,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489431699] [2020-08-22 19:50:41,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 19:50:41,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:41,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 19:50:41,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 19:50:41,338 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 40 states. [2020-08-22 19:50:43,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:43,250 INFO L93 Difference]: Finished difference Result 367 states and 369 transitions. [2020-08-22 19:50:43,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-08-22 19:50:43,252 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 339 [2020-08-22 19:50:43,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:43,254 INFO L225 Difference]: With dead ends: 367 [2020-08-22 19:50:43,254 INFO L226 Difference]: Without dead ends: 359 [2020-08-22 19:50:43,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2020-08-22 19:50:43,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-08-22 19:50:43,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 349. [2020-08-22 19:50:43,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-08-22 19:50:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 350 transitions. [2020-08-22 19:50:43,325 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 350 transitions. Word has length 339 [2020-08-22 19:50:43,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:43,325 INFO L479 AbstractCegarLoop]: Abstraction has 349 states and 350 transitions. [2020-08-22 19:50:43,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 19:50:43,325 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 350 transitions. [2020-08-22 19:50:43,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-08-22 19:50:43,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:43,327 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] [2020-08-22 19:50:43,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-08-22 19:50:43,327 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:43,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:43,327 INFO L82 PathProgramCache]: Analyzing trace with hash -793423037, now seen corresponding path program 35 times [2020-08-22 19:50:43,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:43,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654245062] [2020-08-22 19:50:43,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:43,331 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:43,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:47,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:47,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654245062] [2020-08-22 19:50:47,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:47,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2020-08-22 19:50:47,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887695031] [2020-08-22 19:50:47,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-08-22 19:50:47,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:47,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-08-22 19:50:47,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=5665, Unknown=0, NotChecked=0, Total=5852 [2020-08-22 19:50:47,813 INFO L87 Difference]: Start difference. First operand 349 states and 350 transitions. Second operand 77 states. [2020-08-22 19:50:54,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:54,819 INFO L93 Difference]: Finished difference Result 362 states and 363 transitions. [2020-08-22 19:50:54,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-08-22 19:50:54,820 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 341 [2020-08-22 19:50:54,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:54,823 INFO L225 Difference]: With dead ends: 362 [2020-08-22 19:50:54,823 INFO L226 Difference]: Without dead ends: 355 [2020-08-22 19:50:54,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5991 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=537, Invalid=20925, Unknown=0, NotChecked=0, Total=21462 [2020-08-22 19:50:54,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-08-22 19:50:54,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 352. [2020-08-22 19:50:54,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-08-22 19:50:54,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 353 transitions. [2020-08-22 19:50:54,900 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 353 transitions. Word has length 341 [2020-08-22 19:50:54,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:54,900 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 353 transitions. [2020-08-22 19:50:54,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-08-22 19:50:54,901 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 353 transitions. [2020-08-22 19:50:54,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2020-08-22 19:50:54,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:54,903 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] [2020-08-22 19:50:54,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-08-22 19:50:54,903 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:54,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:54,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1304757334, now seen corresponding path program 38 times [2020-08-22 19:50:54,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:54,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404565039] [2020-08-22 19:50:54,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:54,915 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:54,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:56,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:56,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:50:56,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404565039] [2020-08-22 19:50:56,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:56,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-08-22 19:50:56,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739942985] [2020-08-22 19:50:56,477 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 19:50:56,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:56,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 19:50:56,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 19:50:56,477 INFO L87 Difference]: Start difference. First operand 352 states and 353 transitions. Second operand 41 states. [2020-08-22 19:50:58,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:58,613 INFO L93 Difference]: Finished difference Result 376 states and 378 transitions. [2020-08-22 19:50:58,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-08-22 19:50:58,614 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 348 [2020-08-22 19:50:58,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:58,616 INFO L225 Difference]: With dead ends: 376 [2020-08-22 19:50:58,616 INFO L226 Difference]: Without dead ends: 368 [2020-08-22 19:50:58,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 19:50:58,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2020-08-22 19:50:58,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 358. [2020-08-22 19:50:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 358 states. [2020-08-22 19:50:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 359 transitions. [2020-08-22 19:50:58,693 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 359 transitions. Word has length 348 [2020-08-22 19:50:58,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:58,693 INFO L479 AbstractCegarLoop]: Abstraction has 358 states and 359 transitions. [2020-08-22 19:50:58,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 19:50:58,693 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 359 transitions. [2020-08-22 19:50:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2020-08-22 19:50:58,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:58,695 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] [2020-08-22 19:50:58,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-08-22 19:50:58,696 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:58,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:58,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1636993831, now seen corresponding path program 36 times [2020-08-22 19:50:58,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:58,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46433755] [2020-08-22 19:50:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:58,701 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:58,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:03,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:51:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:51:03,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46433755] [2020-08-22 19:51:03,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:51:03,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2020-08-22 19:51:03,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723271042] [2020-08-22 19:51:03,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-08-22 19:51:03,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:51:03,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-08-22 19:51:03,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=5970, Unknown=0, NotChecked=0, Total=6162 [2020-08-22 19:51:03,534 INFO L87 Difference]: Start difference. First operand 358 states and 359 transitions. Second operand 79 states. [2020-08-22 19:51:13,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:51:13,833 INFO L93 Difference]: Finished difference Result 371 states and 372 transitions. [2020-08-22 19:51:13,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-08-22 19:51:13,835 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 350 [2020-08-22 19:51:13,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:51:13,837 INFO L225 Difference]: With dead ends: 371 [2020-08-22 19:51:13,837 INFO L226 Difference]: Without dead ends: 364 [2020-08-22 19:51:13,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6342 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=552, Invalid=22098, Unknown=0, NotChecked=0, Total=22650 [2020-08-22 19:51:13,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-08-22 19:51:13,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 361. [2020-08-22 19:51:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-08-22 19:51:13,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 362 transitions. [2020-08-22 19:51:13,934 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 362 transitions. Word has length 350 [2020-08-22 19:51:13,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:51:13,935 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 362 transitions. [2020-08-22 19:51:13,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-08-22 19:51:13,935 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 362 transitions. [2020-08-22 19:51:13,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-08-22 19:51:13,937 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:51:13,937 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] [2020-08-22 19:51:13,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-08-22 19:51:13,937 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:51:13,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:51:13,938 INFO L82 PathProgramCache]: Analyzing trace with hash 96865792, now seen corresponding path program 39 times [2020-08-22 19:51:13,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:51:13,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735849764] [2020-08-22 19:51:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:51:13,948 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:51:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:15,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:51:15,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:51:15,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735849764] [2020-08-22 19:51:15,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:51:15,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-08-22 19:51:15,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697427800] [2020-08-22 19:51:15,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 19:51:15,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:51:15,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 19:51:15,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 19:51:15,567 INFO L87 Difference]: Start difference. First operand 361 states and 362 transitions. Second operand 42 states. [2020-08-22 19:51:17,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:51:17,787 INFO L93 Difference]: Finished difference Result 385 states and 387 transitions. [2020-08-22 19:51:17,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-08-22 19:51:17,788 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 357 [2020-08-22 19:51:17,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:51:17,791 INFO L225 Difference]: With dead ends: 385 [2020-08-22 19:51:17,791 INFO L226 Difference]: Without dead ends: 377 [2020-08-22 19:51:17,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2020-08-22 19:51:17,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-08-22 19:51:17,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 367. [2020-08-22 19:51:17,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-08-22 19:51:17,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 368 transitions. [2020-08-22 19:51:17,871 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 368 transitions. Word has length 357 [2020-08-22 19:51:17,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:51:17,872 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 368 transitions. [2020-08-22 19:51:17,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 19:51:17,872 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 368 transitions. [2020-08-22 19:51:17,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-08-22 19:51:17,874 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:51:17,874 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] [2020-08-22 19:51:17,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-08-22 19:51:17,875 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:51:17,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:51:17,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1515371523, now seen corresponding path program 37 times [2020-08-22 19:51:17,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:51:17,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838135209] [2020-08-22 19:51:17,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:51:17,888 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:51:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:22,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:51:22,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:51:23,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838135209] [2020-08-22 19:51:23,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:51:23,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2020-08-22 19:51:23,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850362927] [2020-08-22 19:51:23,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-08-22 19:51:23,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:51:23,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-08-22 19:51:23,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=6283, Unknown=0, NotChecked=0, Total=6480 [2020-08-22 19:51:23,010 INFO L87 Difference]: Start difference. First operand 367 states and 368 transitions. Second operand 81 states. [2020-08-22 19:51:30,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:51:30,665 INFO L93 Difference]: Finished difference Result 380 states and 381 transitions. [2020-08-22 19:51:30,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-08-22 19:51:30,667 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 359 [2020-08-22 19:51:30,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:51:30,669 INFO L225 Difference]: With dead ends: 380 [2020-08-22 19:51:30,669 INFO L226 Difference]: Without dead ends: 373 [2020-08-22 19:51:30,671 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6703 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=567, Invalid=23303, Unknown=0, NotChecked=0, Total=23870 [2020-08-22 19:51:30,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2020-08-22 19:51:30,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 370. [2020-08-22 19:51:30,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 370 states. [2020-08-22 19:51:30,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 371 transitions. [2020-08-22 19:51:30,766 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 371 transitions. Word has length 359 [2020-08-22 19:51:30,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:51:30,766 INFO L479 AbstractCegarLoop]: Abstraction has 370 states and 371 transitions. [2020-08-22 19:51:30,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-08-22 19:51:30,766 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 371 transitions. [2020-08-22 19:51:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2020-08-22 19:51:30,768 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:51:30,768 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] [2020-08-22 19:51:30,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-08-22 19:51:30,768 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:51:30,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:51:30,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1935391850, now seen corresponding path program 40 times [2020-08-22 19:51:30,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:51:30,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894030315] [2020-08-22 19:51:30,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:51:30,774 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:51:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:32,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:51:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:51:32,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894030315] [2020-08-22 19:51:32,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:51:32,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-08-22 19:51:32,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695702344] [2020-08-22 19:51:32,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-22 19:51:32,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:51:32,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-22 19:51:32,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 19:51:32,447 INFO L87 Difference]: Start difference. First operand 370 states and 371 transitions. Second operand 43 states. [2020-08-22 19:51:34,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:51:34,790 INFO L93 Difference]: Finished difference Result 394 states and 396 transitions. [2020-08-22 19:51:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-08-22 19:51:34,791 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 366 [2020-08-22 19:51:34,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:51:34,794 INFO L225 Difference]: With dead ends: 394 [2020-08-22 19:51:34,794 INFO L226 Difference]: Without dead ends: 386 [2020-08-22 19:51:34,795 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 [2020-08-22 19:51:34,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-08-22 19:51:34,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 376. [2020-08-22 19:51:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-08-22 19:51:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 377 transitions. [2020-08-22 19:51:34,891 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 377 transitions. Word has length 366 [2020-08-22 19:51:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:51:34,892 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 377 transitions. [2020-08-22 19:51:34,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-22 19:51:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 377 transitions. [2020-08-22 19:51:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2020-08-22 19:51:34,894 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:51:34,894 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] [2020-08-22 19:51:34,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-08-22 19:51:34,894 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:51:34,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:51:34,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1569070055, now seen corresponding path program 38 times [2020-08-22 19:51:34,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:51:34,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599562232] [2020-08-22 19:51:34,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:51:34,905 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:51:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:40,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:51:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:51:40,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599562232] [2020-08-22 19:51:40,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:51:40,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2020-08-22 19:51:40,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624593675] [2020-08-22 19:51:40,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-08-22 19:51:40,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:51:40,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-08-22 19:51:40,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=6604, Unknown=0, NotChecked=0, Total=6806 [2020-08-22 19:51:40,850 INFO L87 Difference]: Start difference. First operand 376 states and 377 transitions. Second operand 83 states. [2020-08-22 19:51:49,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:51:49,657 INFO L93 Difference]: Finished difference Result 389 states and 390 transitions. [2020-08-22 19:51:49,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-08-22 19:51:49,658 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 368 [2020-08-22 19:51:49,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:51:49,661 INFO L225 Difference]: With dead ends: 389 [2020-08-22 19:51:49,661 INFO L226 Difference]: Without dead ends: 382 [2020-08-22 19:51:49,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7074 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=582, Invalid=24540, Unknown=0, NotChecked=0, Total=25122 [2020-08-22 19:51:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-08-22 19:51:49,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 379. [2020-08-22 19:51:49,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-08-22 19:51:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 380 transitions. [2020-08-22 19:51:49,751 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 380 transitions. Word has length 368 [2020-08-22 19:51:49,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:51:49,752 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 380 transitions. [2020-08-22 19:51:49,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-08-22 19:51:49,752 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 380 transitions. [2020-08-22 19:51:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-08-22 19:51:49,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:51:49,754 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] [2020-08-22 19:51:49,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-08-22 19:51:49,754 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:51:49,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:51:49,755 INFO L82 PathProgramCache]: Analyzing trace with hash 922351296, now seen corresponding path program 41 times [2020-08-22 19:51:49,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:51:49,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31167151] [2020-08-22 19:51:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:51:49,760 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:51:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:51,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:51:51,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:51:51,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31167151] [2020-08-22 19:51:51,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:51:51,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-08-22 19:51:51,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175198612] [2020-08-22 19:51:51,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-08-22 19:51:51,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:51:51,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-08-22 19:51:51,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 19:51:51,623 INFO L87 Difference]: Start difference. First operand 379 states and 380 transitions. Second operand 44 states. [2020-08-22 19:51:54,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:51:54,144 INFO L93 Difference]: Finished difference Result 403 states and 405 transitions. [2020-08-22 19:51:54,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-08-22 19:51:54,145 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 375 [2020-08-22 19:51:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:51:54,147 INFO L225 Difference]: With dead ends: 403 [2020-08-22 19:51:54,147 INFO L226 Difference]: Without dead ends: 395 [2020-08-22 19:51:54,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2020-08-22 19:51:54,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-08-22 19:51:54,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 385. [2020-08-22 19:51:54,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-08-22 19:51:54,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 386 transitions. [2020-08-22 19:51:54,238 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 386 transitions. Word has length 375 [2020-08-22 19:51:54,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:51:54,239 INFO L479 AbstractCegarLoop]: Abstraction has 385 states and 386 transitions. [2020-08-22 19:51:54,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-08-22 19:51:54,239 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 386 transitions. [2020-08-22 19:51:54,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-08-22 19:51:54,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:51:54,241 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] [2020-08-22 19:51:54,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-08-22 19:51:54,241 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:51:54,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:51:54,242 INFO L82 PathProgramCache]: Analyzing trace with hash 237991107, now seen corresponding path program 39 times [2020-08-22 19:51:54,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:51:54,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903982561] [2020-08-22 19:51:54,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:51:54,248 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:51:54,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:51:59,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:51:59,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:52:00,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903982561] [2020-08-22 19:52:00,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:52:00,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2020-08-22 19:52:00,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824678588] [2020-08-22 19:52:00,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-08-22 19:52:00,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:52:00,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-08-22 19:52:00,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=6933, Unknown=0, NotChecked=0, Total=7140 [2020-08-22 19:52:00,068 INFO L87 Difference]: Start difference. First operand 385 states and 386 transitions. Second operand 85 states. [2020-08-22 19:52:12,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:52:12,779 INFO L93 Difference]: Finished difference Result 398 states and 399 transitions. [2020-08-22 19:52:12,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-08-22 19:52:12,781 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 377 [2020-08-22 19:52:12,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:52:12,783 INFO L225 Difference]: With dead ends: 398 [2020-08-22 19:52:12,783 INFO L226 Difference]: Without dead ends: 391 [2020-08-22 19:52:12,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7455 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=597, Invalid=25809, Unknown=0, NotChecked=0, Total=26406 [2020-08-22 19:52:12,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-08-22 19:52:12,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 388. [2020-08-22 19:52:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-08-22 19:52:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 389 transitions. [2020-08-22 19:52:12,880 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 389 transitions. Word has length 377 [2020-08-22 19:52:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:52:12,881 INFO L479 AbstractCegarLoop]: Abstraction has 388 states and 389 transitions. [2020-08-22 19:52:12,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-08-22 19:52:12,881 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 389 transitions. [2020-08-22 19:52:12,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2020-08-22 19:52:12,883 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:52:12,883 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] [2020-08-22 19:52:12,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-08-22 19:52:12,883 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:52:12,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:52:12,883 INFO L82 PathProgramCache]: Analyzing trace with hash -899009834, now seen corresponding path program 42 times [2020-08-22 19:52:12,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:52:12,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548686772] [2020-08-22 19:52:12,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:52:12,888 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:52:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:14,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:52:14,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:14,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:52:14,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548686772] [2020-08-22 19:52:14,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:52:14,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-08-22 19:52:14,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258005944] [2020-08-22 19:52:14,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-08-22 19:52:14,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:52:14,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-08-22 19:52:14,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 19:52:14,818 INFO L87 Difference]: Start difference. First operand 388 states and 389 transitions. Second operand 45 states. [2020-08-22 19:52:17,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:52:17,525 INFO L93 Difference]: Finished difference Result 412 states and 414 transitions. [2020-08-22 19:52:17,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-08-22 19:52:17,527 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 384 [2020-08-22 19:52:17,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:52:17,529 INFO L225 Difference]: With dead ends: 412 [2020-08-22 19:52:17,529 INFO L226 Difference]: Without dead ends: 404 [2020-08-22 19:52:17,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2020-08-22 19:52:17,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-22 19:52:17,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 394. [2020-08-22 19:52:17,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-08-22 19:52:17,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 395 transitions. [2020-08-22 19:52:17,616 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 395 transitions. Word has length 384 [2020-08-22 19:52:17,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:52:17,617 INFO L479 AbstractCegarLoop]: Abstraction has 394 states and 395 transitions. [2020-08-22 19:52:17,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-08-22 19:52:17,617 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 395 transitions. [2020-08-22 19:52:17,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-08-22 19:52:17,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:52:17,618 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] [2020-08-22 19:52:17,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-08-22 19:52:17,619 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:52:17,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:52:17,619 INFO L82 PathProgramCache]: Analyzing trace with hash -2038365351, now seen corresponding path program 40 times [2020-08-22 19:52:17,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:52:17,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858299447] [2020-08-22 19:52:17,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:52:17,624 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:52:17,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:23,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:52:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:24,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:52:24,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858299447] [2020-08-22 19:52:24,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:52:24,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2020-08-22 19:52:24,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952827016] [2020-08-22 19:52:24,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-08-22 19:52:24,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:52:24,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-08-22 19:52:24,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=7270, Unknown=0, NotChecked=0, Total=7482 [2020-08-22 19:52:24,002 INFO L87 Difference]: Start difference. First operand 394 states and 395 transitions. Second operand 87 states. [2020-08-22 19:52:39,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:52:39,141 INFO L93 Difference]: Finished difference Result 407 states and 408 transitions. [2020-08-22 19:52:39,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-08-22 19:52:39,143 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 386 [2020-08-22 19:52:39,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:52:39,146 INFO L225 Difference]: With dead ends: 407 [2020-08-22 19:52:39,146 INFO L226 Difference]: Without dead ends: 400 [2020-08-22 19:52:39,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7846 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=612, Invalid=27110, Unknown=0, NotChecked=0, Total=27722 [2020-08-22 19:52:39,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-08-22 19:52:39,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 397. [2020-08-22 19:52:39,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-08-22 19:52:39,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 398 transitions. [2020-08-22 19:52:39,240 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 398 transitions. Word has length 386 [2020-08-22 19:52:39,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:52:39,240 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 398 transitions. [2020-08-22 19:52:39,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-08-22 19:52:39,240 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 398 transitions. [2020-08-22 19:52:39,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-08-22 19:52:39,242 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:52:39,242 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] [2020-08-22 19:52:39,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-08-22 19:52:39,243 INFO L427 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:52:39,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:52:39,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1238183808, now seen corresponding path program 43 times [2020-08-22 19:52:39,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:52:39,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121731433] [2020-08-22 19:52:39,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:52:39,250 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:52:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:41,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:52:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:52:41,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121731433] [2020-08-22 19:52:41,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:52:41,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-08-22 19:52:41,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531638536] [2020-08-22 19:52:41,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-08-22 19:52:41,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:52:41,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-08-22 19:52:41,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 19:52:41,479 INFO L87 Difference]: Start difference. First operand 397 states and 398 transitions. Second operand 46 states. [2020-08-22 19:52:44,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:52:44,640 INFO L93 Difference]: Finished difference Result 421 states and 423 transitions. [2020-08-22 19:52:44,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-08-22 19:52:44,642 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 393 [2020-08-22 19:52:44,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:52:44,645 INFO L225 Difference]: With dead ends: 421 [2020-08-22 19:52:44,645 INFO L226 Difference]: Without dead ends: 413 [2020-08-22 19:52:44,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2020-08-22 19:52:44,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-08-22 19:52:44,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 403. [2020-08-22 19:52:44,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-08-22 19:52:44,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2020-08-22 19:52:44,738 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 393 [2020-08-22 19:52:44,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:52:44,738 INFO L479 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2020-08-22 19:52:44,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-08-22 19:52:44,739 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2020-08-22 19:52:44,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-08-22 19:52:44,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:52:44,740 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] [2020-08-22 19:52:44,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-08-22 19:52:44,741 INFO L427 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:52:44,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:52:44,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1189642877, now seen corresponding path program 41 times [2020-08-22 19:52:44,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:52:44,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402362587] [2020-08-22 19:52:44,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:52:44,746 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:52:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:52,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:52:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:52:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:52:52,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402362587] [2020-08-22 19:52:52,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:52:52,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2020-08-22 19:52:52,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550822631] [2020-08-22 19:52:52,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-08-22 19:52:52,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:52:52,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-08-22 19:52:52,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=7615, Unknown=0, NotChecked=0, Total=7832 [2020-08-22 19:52:52,295 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 89 states. [2020-08-22 19:53:04,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:53:04,780 INFO L93 Difference]: Finished difference Result 416 states and 417 transitions. [2020-08-22 19:53:04,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-08-22 19:53:04,782 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 395 [2020-08-22 19:53:04,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:53:04,784 INFO L225 Difference]: With dead ends: 416 [2020-08-22 19:53:04,784 INFO L226 Difference]: Without dead ends: 409 [2020-08-22 19:53:04,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8247 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=627, Invalid=28443, Unknown=0, NotChecked=0, Total=29070 [2020-08-22 19:53:04,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-08-22 19:53:04,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 406. [2020-08-22 19:53:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-08-22 19:53:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 407 transitions. [2020-08-22 19:53:04,882 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 407 transitions. Word has length 395 [2020-08-22 19:53:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:53:04,882 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 407 transitions. [2020-08-22 19:53:04,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-08-22 19:53:04,882 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 407 transitions. [2020-08-22 19:53:04,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-08-22 19:53:04,884 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:53:04,884 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] [2020-08-22 19:53:04,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-08-22 19:53:04,884 INFO L427 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:53:04,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:53:04,884 INFO L82 PathProgramCache]: Analyzing trace with hash 2093666838, now seen corresponding path program 44 times [2020-08-22 19:53:04,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:53:04,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051038238] [2020-08-22 19:53:04,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:53:04,890 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:53:04,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:07,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:53:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:53:07,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051038238] [2020-08-22 19:53:07,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:53:07,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-08-22 19:53:07,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439562064] [2020-08-22 19:53:07,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-08-22 19:53:07,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:53:07,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-08-22 19:53:07,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-08-22 19:53:07,446 INFO L87 Difference]: Start difference. First operand 406 states and 407 transitions. Second operand 47 states. [2020-08-22 19:53:11,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:53:11,038 INFO L93 Difference]: Finished difference Result 430 states and 432 transitions. [2020-08-22 19:53:11,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-08-22 19:53:11,041 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 402 [2020-08-22 19:53:11,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:53:11,043 INFO L225 Difference]: With dead ends: 430 [2020-08-22 19:53:11,043 INFO L226 Difference]: Without dead ends: 422 [2020-08-22 19:53:11,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2020-08-22 19:53:11,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2020-08-22 19:53:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2020-08-22 19:53:11,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-08-22 19:53:11,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 413 transitions. [2020-08-22 19:53:11,140 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 413 transitions. Word has length 402 [2020-08-22 19:53:11,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:53:11,140 INFO L479 AbstractCegarLoop]: Abstraction has 412 states and 413 transitions. [2020-08-22 19:53:11,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-08-22 19:53:11,140 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 413 transitions. [2020-08-22 19:53:11,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2020-08-22 19:53:11,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:53:11,142 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] [2020-08-22 19:53:11,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-08-22 19:53:11,142 INFO L427 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:53:11,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:53:11,142 INFO L82 PathProgramCache]: Analyzing trace with hash 590795417, now seen corresponding path program 42 times [2020-08-22 19:53:11,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:53:11,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899334777] [2020-08-22 19:53:11,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:53:11,155 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:53:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:19,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:53:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:53:19,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899334777] [2020-08-22 19:53:19,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:53:19,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2020-08-22 19:53:19,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689963151] [2020-08-22 19:53:19,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-08-22 19:53:19,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:53:19,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-08-22 19:53:19,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=7968, Unknown=0, NotChecked=0, Total=8190 [2020-08-22 19:53:19,736 INFO L87 Difference]: Start difference. First operand 412 states and 413 transitions. Second operand 91 states. [2020-08-22 19:53:35,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:53:35,624 INFO L93 Difference]: Finished difference Result 425 states and 426 transitions. [2020-08-22 19:53:35,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-08-22 19:53:35,627 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 404 [2020-08-22 19:53:35,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:53:35,629 INFO L225 Difference]: With dead ends: 425 [2020-08-22 19:53:35,629 INFO L226 Difference]: Without dead ends: 418 [2020-08-22 19:53:35,630 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 [2020-08-22 19:53:35,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-08-22 19:53:35,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 415. [2020-08-22 19:53:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-08-22 19:53:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 416 transitions. [2020-08-22 19:53:35,749 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 416 transitions. Word has length 404 [2020-08-22 19:53:35,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:53:35,749 INFO L479 AbstractCegarLoop]: Abstraction has 415 states and 416 transitions. [2020-08-22 19:53:35,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-08-22 19:53:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 416 transitions. [2020-08-22 19:53:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-08-22 19:53:35,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:53:35,751 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] [2020-08-22 19:53:35,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-08-22 19:53:35,751 INFO L427 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:53:35,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:53:35,751 INFO L82 PathProgramCache]: Analyzing trace with hash -217335744, now seen corresponding path program 45 times [2020-08-22 19:53:35,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:53:35,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176381840] [2020-08-22 19:53:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:53:35,760 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:53:35,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:38,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:53:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:53:39,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176381840] [2020-08-22 19:53:39,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:53:39,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-08-22 19:53:39,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262185811] [2020-08-22 19:53:39,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-08-22 19:53:39,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:53:39,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-08-22 19:53:39,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-08-22 19:53:39,029 INFO L87 Difference]: Start difference. First operand 415 states and 416 transitions. Second operand 48 states. [2020-08-22 19:53:43,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:53:43,507 INFO L93 Difference]: Finished difference Result 439 states and 441 transitions. [2020-08-22 19:53:43,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-08-22 19:53:43,510 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 411 [2020-08-22 19:53:43,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:53:43,513 INFO L225 Difference]: With dead ends: 439 [2020-08-22 19:53:43,513 INFO L226 Difference]: Without dead ends: 431 [2020-08-22 19:53:43,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2020-08-22 19:53:43,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-08-22 19:53:43,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 421. [2020-08-22 19:53:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-08-22 19:53:43,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 422 transitions. [2020-08-22 19:53:43,627 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 422 transitions. Word has length 411 [2020-08-22 19:53:43,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:53:43,628 INFO L479 AbstractCegarLoop]: Abstraction has 421 states and 422 transitions. [2020-08-22 19:53:43,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-08-22 19:53:43,628 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 422 transitions. [2020-08-22 19:53:43,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-08-22 19:53:43,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:53:43,630 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] [2020-08-22 19:53:43,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2020-08-22 19:53:43,630 INFO L427 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:53:43,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:53:43,630 INFO L82 PathProgramCache]: Analyzing trace with hash 215406147, now seen corresponding path program 43 times [2020-08-22 19:53:43,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:53:43,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922491206] [2020-08-22 19:53:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:53:43,637 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:53:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:53,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:53:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:53:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:53:53,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922491206] [2020-08-22 19:53:53,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:53:53,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2020-08-22 19:53:53,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477977459] [2020-08-22 19:53:53,481 INFO L459 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-08-22 19:53:53,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:53:53,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-08-22 19:53:53,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=8329, Unknown=0, NotChecked=0, Total=8556 [2020-08-22 19:53:53,482 INFO L87 Difference]: Start difference. First operand 421 states and 422 transitions. Second operand 93 states. [2020-08-22 19:54:17,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:54:17,504 INFO L93 Difference]: Finished difference Result 434 states and 435 transitions. [2020-08-22 19:54:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-08-22 19:54:17,507 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 413 [2020-08-22 19:54:17,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:54:17,509 INFO L225 Difference]: With dead ends: 434 [2020-08-22 19:54:17,510 INFO L226 Difference]: Without dead ends: 427 [2020-08-22 19:54:17,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9079 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=657, Invalid=31205, Unknown=0, NotChecked=0, Total=31862 [2020-08-22 19:54:17,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2020-08-22 19:54:17,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 424. [2020-08-22 19:54:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-08-22 19:54:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 425 transitions. [2020-08-22 19:54:17,629 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 425 transitions. Word has length 413 [2020-08-22 19:54:17,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:54:17,629 INFO L479 AbstractCegarLoop]: Abstraction has 424 states and 425 transitions. [2020-08-22 19:54:17,629 INFO L480 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-08-22 19:54:17,630 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 425 transitions. [2020-08-22 19:54:17,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-08-22 19:54:17,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:54:17,631 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] [2020-08-22 19:54:17,632 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2020-08-22 19:54:17,632 INFO L427 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:54:17,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:54:17,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1803935402, now seen corresponding path program 46 times [2020-08-22 19:54:17,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:54:17,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602728906] [2020-08-22 19:54:17,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:54:17,638 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:54:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:54:20,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:54:20,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:54:21,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:54:21,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602728906] [2020-08-22 19:54:21,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:54:21,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-08-22 19:54:21,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969995352] [2020-08-22 19:54:21,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-08-22 19:54:21,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:54:21,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-08-22 19:54:21,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-08-22 19:54:21,010 INFO L87 Difference]: Start difference. First operand 424 states and 425 transitions. Second operand 49 states. [2020-08-22 19:54:25,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:54:25,749 INFO L93 Difference]: Finished difference Result 448 states and 450 transitions. [2020-08-22 19:54:25,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-08-22 19:54:25,752 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 420 [2020-08-22 19:54:25,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:54:25,755 INFO L225 Difference]: With dead ends: 448 [2020-08-22 19:54:25,755 INFO L226 Difference]: Without dead ends: 440 [2020-08-22 19:54:25,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2020-08-22 19:54:25,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2020-08-22 19:54:25,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 430. [2020-08-22 19:54:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 430 states. [2020-08-22 19:54:25,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 431 transitions. [2020-08-22 19:54:25,863 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 431 transitions. Word has length 420 [2020-08-22 19:54:25,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:54:25,863 INFO L479 AbstractCegarLoop]: Abstraction has 430 states and 431 transitions. [2020-08-22 19:54:25,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-08-22 19:54:25,864 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 431 transitions. [2020-08-22 19:54:25,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-08-22 19:54:25,865 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:54:25,865 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] [2020-08-22 19:54:25,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2020-08-22 19:54:25,866 INFO L427 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:54:25,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:54:25,866 INFO L82 PathProgramCache]: Analyzing trace with hash 206524889, now seen corresponding path program 44 times [2020-08-22 19:54:25,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:54:25,866 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073067542] [2020-08-22 19:54:25,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:54:25,872 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:54:25,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:54:36,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:54:36,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:54:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:54:36,673 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073067542] [2020-08-22 19:54:36,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:54:36,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2020-08-22 19:54:36,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237320138] [2020-08-22 19:54:36,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-08-22 19:54:36,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:54:36,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-08-22 19:54:36,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=8698, Unknown=0, NotChecked=0, Total=8930 [2020-08-22 19:54:36,674 INFO L87 Difference]: Start difference. First operand 430 states and 431 transitions. Second operand 95 states. [2020-08-22 19:55:05,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:55:05,225 INFO L93 Difference]: Finished difference Result 443 states and 444 transitions. [2020-08-22 19:55:05,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2020-08-22 19:55:05,229 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 422 [2020-08-22 19:55:05,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:55:05,232 INFO L225 Difference]: With dead ends: 443 [2020-08-22 19:55:05,232 INFO L226 Difference]: Without dead ends: 436 [2020-08-22 19:55:05,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9510 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=672, Invalid=32634, Unknown=0, NotChecked=0, Total=33306 [2020-08-22 19:55:05,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-08-22 19:55:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 433. [2020-08-22 19:55:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-08-22 19:55:05,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 434 transitions. [2020-08-22 19:55:05,352 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 434 transitions. Word has length 422 [2020-08-22 19:55:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:55:05,353 INFO L479 AbstractCegarLoop]: Abstraction has 433 states and 434 transitions. [2020-08-22 19:55:05,353 INFO L480 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-08-22 19:55:05,353 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 434 transitions. [2020-08-22 19:55:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-08-22 19:55:05,355 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:55:05,355 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] [2020-08-22 19:55:05,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2020-08-22 19:55:05,355 INFO L427 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:55:05,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:55:05,356 INFO L82 PathProgramCache]: Analyzing trace with hash -863923968, now seen corresponding path program 47 times [2020-08-22 19:55:05,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:55:05,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141631868] [2020-08-22 19:55:05,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:55:05,361 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:55:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:09,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:55:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:55:09,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141631868] [2020-08-22 19:55:09,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:55:09,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-08-22 19:55:09,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977614531] [2020-08-22 19:55:09,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-08-22 19:55:09,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:55:09,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-08-22 19:55:09,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-08-22 19:55:09,333 INFO L87 Difference]: Start difference. First operand 433 states and 434 transitions. Second operand 50 states. [2020-08-22 19:55:14,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:55:14,682 INFO L93 Difference]: Finished difference Result 457 states and 459 transitions. [2020-08-22 19:55:14,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-08-22 19:55:14,686 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 429 [2020-08-22 19:55:14,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:55:14,689 INFO L225 Difference]: With dead ends: 457 [2020-08-22 19:55:14,689 INFO L226 Difference]: Without dead ends: 449 [2020-08-22 19:55:14,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2020-08-22 19:55:14,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-22 19:55:14,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 439. [2020-08-22 19:55:14,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-08-22 19:55:14,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 440 transitions. [2020-08-22 19:55:14,816 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 440 transitions. Word has length 429 [2020-08-22 19:55:14,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:55:14,817 INFO L479 AbstractCegarLoop]: Abstraction has 439 states and 440 transitions. [2020-08-22 19:55:14,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-08-22 19:55:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 440 transitions. [2020-08-22 19:55:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-08-22 19:55:14,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:55:14,819 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] [2020-08-22 19:55:14,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2020-08-22 19:55:14,820 INFO L427 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:55:14,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:55:14,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1614380803, now seen corresponding path program 45 times [2020-08-22 19:55:14,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:55:14,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605725483] [2020-08-22 19:55:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:55:14,826 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:55:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:26,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:55:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:55:26,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605725483] [2020-08-22 19:55:26,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:55:26,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2020-08-22 19:55:26,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031392934] [2020-08-22 19:55:26,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-08-22 19:55:26,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:55:26,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-08-22 19:55:26,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=9075, Unknown=0, NotChecked=0, Total=9312 [2020-08-22 19:55:26,676 INFO L87 Difference]: Start difference. First operand 439 states and 440 transitions. Second operand 97 states. [2020-08-22 19:55:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:55:48,643 INFO L93 Difference]: Finished difference Result 452 states and 453 transitions. [2020-08-22 19:55:48,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-08-22 19:55:48,648 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 431 [2020-08-22 19:55:48,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:55:48,651 INFO L225 Difference]: With dead ends: 452 [2020-08-22 19:55:48,651 INFO L226 Difference]: Without dead ends: 445 [2020-08-22 19:55:48,652 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9951 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=687, Invalid=34095, Unknown=0, NotChecked=0, Total=34782 [2020-08-22 19:55:48,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-08-22 19:55:48,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 442. [2020-08-22 19:55:48,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-08-22 19:55:48,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 443 transitions. [2020-08-22 19:55:48,767 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 443 transitions. Word has length 431 [2020-08-22 19:55:48,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:55:48,767 INFO L479 AbstractCegarLoop]: Abstraction has 442 states and 443 transitions. [2020-08-22 19:55:48,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-08-22 19:55:48,767 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 443 transitions. [2020-08-22 19:55:48,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 439 [2020-08-22 19:55:48,769 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:55:48,769 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] [2020-08-22 19:55:48,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2020-08-22 19:55:48,769 INFO L427 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:55:48,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:55:48,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1121181546, now seen corresponding path program 48 times [2020-08-22 19:55:48,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:55:48,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244919100] [2020-08-22 19:55:48,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:55:48,775 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:55:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:52,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:55:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:55:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:55:52,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244919100] [2020-08-22 19:55:52,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:55:52,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-08-22 19:55:52,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417425660] [2020-08-22 19:55:52,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-08-22 19:55:52,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:55:52,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-08-22 19:55:52,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-08-22 19:55:52,986 INFO L87 Difference]: Start difference. First operand 442 states and 443 transitions. Second operand 51 states. [2020-08-22 19:55:59,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:55:59,032 INFO L93 Difference]: Finished difference Result 466 states and 468 transitions. [2020-08-22 19:55:59,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-08-22 19:55:59,036 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 438 [2020-08-22 19:55:59,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:55:59,039 INFO L225 Difference]: With dead ends: 466 [2020-08-22 19:55:59,039 INFO L226 Difference]: Without dead ends: 458 [2020-08-22 19:55:59,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2020-08-22 19:55:59,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-22 19:55:59,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 448. [2020-08-22 19:55:59,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-22 19:55:59,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 449 transitions. [2020-08-22 19:55:59,165 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 449 transitions. Word has length 438 [2020-08-22 19:55:59,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:55:59,165 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 449 transitions. [2020-08-22 19:55:59,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-08-22 19:55:59,166 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 449 transitions. [2020-08-22 19:55:59,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2020-08-22 19:55:59,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:55:59,167 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] [2020-08-22 19:55:59,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2020-08-22 19:55:59,168 INFO L427 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:55:59,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:55:59,168 INFO L82 PathProgramCache]: Analyzing trace with hash -797015783, now seen corresponding path program 46 times [2020-08-22 19:55:59,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:55:59,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749480464] [2020-08-22 19:55:59,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:55:59,175 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:55:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:56:12,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:56:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:56:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:56:13,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749480464] [2020-08-22 19:56:13,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:56:13,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2020-08-22 19:56:13,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208095950] [2020-08-22 19:56:13,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-08-22 19:56:13,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:56:13,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-08-22 19:56:13,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=9460, Unknown=0, NotChecked=0, Total=9702 [2020-08-22 19:56:13,205 INFO L87 Difference]: Start difference. First operand 448 states and 449 transitions. Second operand 99 states. [2020-08-22 19:56:40,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:56:40,770 INFO L93 Difference]: Finished difference Result 461 states and 462 transitions. [2020-08-22 19:56:40,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-08-22 19:56:40,774 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 440 [2020-08-22 19:56:40,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:56:40,777 INFO L225 Difference]: With dead ends: 461 [2020-08-22 19:56:40,777 INFO L226 Difference]: Without dead ends: 454 [2020-08-22 19:56:40,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10402 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=702, Invalid=35588, Unknown=0, NotChecked=0, Total=36290 [2020-08-22 19:56:40,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-08-22 19:56:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 451. [2020-08-22 19:56:40,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-08-22 19:56:40,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 452 transitions. [2020-08-22 19:56:40,925 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 452 transitions. Word has length 440 [2020-08-22 19:56:40,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:56:40,925 INFO L479 AbstractCegarLoop]: Abstraction has 451 states and 452 transitions. [2020-08-22 19:56:40,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-08-22 19:56:40,926 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 452 transitions. [2020-08-22 19:56:40,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-08-22 19:56:40,928 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:56:40,928 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] [2020-08-22 19:56:40,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2020-08-22 19:56:40,929 INFO L427 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:56:40,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:56:40,929 INFO L82 PathProgramCache]: Analyzing trace with hash 351975872, now seen corresponding path program 49 times [2020-08-22 19:56:40,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:56:40,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992059472] [2020-08-22 19:56:40,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:56:40,936 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:56:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:56:45,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:56:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:56:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:56:45,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992059472] [2020-08-22 19:56:45,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:56:45,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-08-22 19:56:45,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188712828] [2020-08-22 19:56:45,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-08-22 19:56:45,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:56:45,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-08-22 19:56:45,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-08-22 19:56:45,743 INFO L87 Difference]: Start difference. First operand 451 states and 452 transitions. Second operand 52 states. [2020-08-22 19:56:52,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:56:52,457 INFO L93 Difference]: Finished difference Result 475 states and 477 transitions. [2020-08-22 19:56:52,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-08-22 19:56:52,461 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 447 [2020-08-22 19:56:52,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:56:52,464 INFO L225 Difference]: With dead ends: 475 [2020-08-22 19:56:52,464 INFO L226 Difference]: Without dead ends: 467 [2020-08-22 19:56:52,465 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 [2020-08-22 19:56:52,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-08-22 19:56:52,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 457. [2020-08-22 19:56:52,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-08-22 19:56:52,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 458 transitions. [2020-08-22 19:56:52,583 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 458 transitions. Word has length 447 [2020-08-22 19:56:52,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:56:52,584 INFO L479 AbstractCegarLoop]: Abstraction has 457 states and 458 transitions. [2020-08-22 19:56:52,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-08-22 19:56:52,584 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 458 transitions. [2020-08-22 19:56:52,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-08-22 19:56:52,585 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:56:52,586 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] [2020-08-22 19:56:52,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2020-08-22 19:56:52,586 INFO L427 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:56:52,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:56:52,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1863022531, now seen corresponding path program 47 times [2020-08-22 19:56:52,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:56:52,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623339035] [2020-08-22 19:56:52,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:56:52,592 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:56:52,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:57:07,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:57:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:57:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:57:07,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623339035] [2020-08-22 19:57:07,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:57:07,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2020-08-22 19:57:07,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582224844] [2020-08-22 19:57:07,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-08-22 19:57:07,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:57:07,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-08-22 19:57:07,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=9853, Unknown=0, NotChecked=0, Total=10100 [2020-08-22 19:57:07,611 INFO L87 Difference]: Start difference. First operand 457 states and 458 transitions. Second operand 101 states. [2020-08-22 19:57:50,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:57:50,778 INFO L93 Difference]: Finished difference Result 470 states and 471 transitions. [2020-08-22 19:57:50,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2020-08-22 19:57:50,783 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 449 [2020-08-22 19:57:50,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:57:50,786 INFO L225 Difference]: With dead ends: 470 [2020-08-22 19:57:50,786 INFO L226 Difference]: Without dead ends: 463 [2020-08-22 19:57:50,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10863 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=717, Invalid=37113, Unknown=0, NotChecked=0, Total=37830 [2020-08-22 19:57:50,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-08-22 19:57:50,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 460. [2020-08-22 19:57:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 460 states. [2020-08-22 19:57:50,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 461 transitions. [2020-08-22 19:57:50,911 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 461 transitions. Word has length 449 [2020-08-22 19:57:50,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:57:50,912 INFO L479 AbstractCegarLoop]: Abstraction has 460 states and 461 transitions. [2020-08-22 19:57:50,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-08-22 19:57:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 461 transitions. [2020-08-22 19:57:50,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2020-08-22 19:57:50,914 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:57:50,914 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] [2020-08-22 19:57:50,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2020-08-22 19:57:50,914 INFO L427 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:57:50,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:57:50,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1651191850, now seen corresponding path program 50 times [2020-08-22 19:57:50,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:57:50,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129263843] [2020-08-22 19:57:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:57:50,921 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:57:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:57:56,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:57:56,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:57:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:57:56,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129263843] [2020-08-22 19:57:56,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:57:56,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2020-08-22 19:57:56,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270962319] [2020-08-22 19:57:56,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-08-22 19:57:56,220 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:57:56,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-08-22 19:57:56,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-08-22 19:57:56,220 INFO L87 Difference]: Start difference. First operand 460 states and 461 transitions. Second operand 53 states. [2020-08-22 19:58:03,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:58:03,817 INFO L93 Difference]: Finished difference Result 484 states and 486 transitions. [2020-08-22 19:58:03,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-08-22 19:58:03,822 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 456 [2020-08-22 19:58:03,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:58:03,825 INFO L225 Difference]: With dead ends: 484 [2020-08-22 19:58:03,825 INFO L226 Difference]: Without dead ends: 476 [2020-08-22 19:58:03,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2020-08-22 19:58:03,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-08-22 19:58:03,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 466. [2020-08-22 19:58:03,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-08-22 19:58:03,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 467 transitions. [2020-08-22 19:58:03,969 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 467 transitions. Word has length 456 [2020-08-22 19:58:03,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:58:03,969 INFO L479 AbstractCegarLoop]: Abstraction has 466 states and 467 transitions. [2020-08-22 19:58:03,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-08-22 19:58:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 467 transitions. [2020-08-22 19:58:03,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-08-22 19:58:03,971 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:58:03,972 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] [2020-08-22 19:58:03,972 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2020-08-22 19:58:03,972 INFO L427 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:58:03,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:58:03,973 INFO L82 PathProgramCache]: Analyzing trace with hash 964190297, now seen corresponding path program 48 times [2020-08-22 19:58:03,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:58:03,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309244173] [2020-08-22 19:58:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:58:03,981 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:58:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:58:20,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:58:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:58:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:58:21,043 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309244173] [2020-08-22 19:58:21,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:58:21,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2020-08-22 19:58:21,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62074548] [2020-08-22 19:58:21,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-08-22 19:58:21,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:58:21,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-08-22 19:58:21,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=10254, Unknown=0, NotChecked=0, Total=10506 [2020-08-22 19:58:21,045 INFO L87 Difference]: Start difference. First operand 466 states and 467 transitions. Second operand 103 states. [2020-08-22 19:59:09,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:59:09,944 INFO L93 Difference]: Finished difference Result 479 states and 480 transitions. [2020-08-22 19:59:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-08-22 19:59:09,949 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 458 [2020-08-22 19:59:09,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:59:09,952 INFO L225 Difference]: With dead ends: 479 [2020-08-22 19:59:09,953 INFO L226 Difference]: Without dead ends: 472 [2020-08-22 19:59:09,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11334 ImplicationChecksByTransitivity, 30.4s TimeCoverageRelationStatistics Valid=732, Invalid=38670, Unknown=0, NotChecked=0, Total=39402 [2020-08-22 19:59:09,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-22 19:59:10,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 469. [2020-08-22 19:59:10,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-08-22 19:59:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 470 transitions. [2020-08-22 19:59:10,088 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 470 transitions. Word has length 458 [2020-08-22 19:59:10,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:59:10,089 INFO L479 AbstractCegarLoop]: Abstraction has 469 states and 470 transitions. [2020-08-22 19:59:10,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-08-22 19:59:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 470 transitions. [2020-08-22 19:59:10,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-08-22 19:59:10,093 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:59:10,093 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] [2020-08-22 19:59:10,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2020-08-22 19:59:10,093 INFO L427 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:59:10,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:59:10,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1883452032, now seen corresponding path program 51 times [2020-08-22 19:59:10,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:59:10,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643994393] [2020-08-22 19:59:10,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:59:10,101 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:59:10,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:59:16,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:59:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:59:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:59:16,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643994393] [2020-08-22 19:59:16,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:59:16,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-08-22 19:59:16,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586970490] [2020-08-22 19:59:16,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-08-22 19:59:16,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:59:16,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-08-22 19:59:16,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-08-22 19:59:16,219 INFO L87 Difference]: Start difference. First operand 469 states and 470 transitions. Second operand 54 states. [2020-08-22 19:59:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:59:24,926 INFO L93 Difference]: Finished difference Result 493 states and 495 transitions. [2020-08-22 19:59:24,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-08-22 19:59:24,931 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 465 [2020-08-22 19:59:24,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:59:24,933 INFO L225 Difference]: With dead ends: 493 [2020-08-22 19:59:24,934 INFO L226 Difference]: Without dead ends: 485 [2020-08-22 19:59:24,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2020-08-22 19:59:24,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2020-08-22 19:59:25,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 475. [2020-08-22 19:59:25,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2020-08-22 19:59:25,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 476 transitions. [2020-08-22 19:59:25,072 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 476 transitions. Word has length 465 [2020-08-22 19:59:25,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:59:25,073 INFO L479 AbstractCegarLoop]: Abstraction has 475 states and 476 transitions. [2020-08-22 19:59:25,073 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-08-22 19:59:25,073 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 476 transitions. [2020-08-22 19:59:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-08-22 19:59:25,075 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:59:25,075 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] [2020-08-22 19:59:25,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2020-08-22 19:59:25,075 INFO L427 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:59:25,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:59:25,076 INFO L82 PathProgramCache]: Analyzing trace with hash 437829763, now seen corresponding path program 49 times [2020-08-22 19:59:25,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:59:25,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685134327] [2020-08-22 19:59:25,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:59:25,092 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:59:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:59:44,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:59:44,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:59:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:59:44,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685134327] [2020-08-22 19:59:44,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:59:44,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2020-08-22 19:59:44,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082368930] [2020-08-22 19:59:44,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 105 states [2020-08-22 19:59:44,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:59:44,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2020-08-22 19:59:44,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=10663, Unknown=0, NotChecked=0, Total=10920 [2020-08-22 19:59:44,413 INFO L87 Difference]: Start difference. First operand 475 states and 476 transitions. Second operand 105 states. [2020-08-22 20:00:21,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:00:21,889 INFO L93 Difference]: Finished difference Result 488 states and 489 transitions. [2020-08-22 20:00:21,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-08-22 20:00:21,895 INFO L78 Accepts]: Start accepts. Automaton has 105 states. Word has length 467 [2020-08-22 20:00:21,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:00:21,896 INFO L225 Difference]: With dead ends: 488 [2020-08-22 20:00:21,896 INFO L226 Difference]: Without dead ends: 481 [2020-08-22 20:00:21,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11815 ImplicationChecksByTransitivity, 34.4s TimeCoverageRelationStatistics Valid=747, Invalid=40259, Unknown=0, NotChecked=0, Total=41006 [2020-08-22 20:00:21,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2020-08-22 20:00:22,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 478. [2020-08-22 20:00:22,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 478 states. [2020-08-22 20:00:22,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 479 transitions. [2020-08-22 20:00:22,053 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 479 transitions. Word has length 467 [2020-08-22 20:00:22,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:00:22,054 INFO L479 AbstractCegarLoop]: Abstraction has 478 states and 479 transitions. [2020-08-22 20:00:22,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 105 states. [2020-08-22 20:00:22,054 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 479 transitions. [2020-08-22 20:00:22,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-08-22 20:00:22,056 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:00:22,056 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] [2020-08-22 20:00:22,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2020-08-22 20:00:22,056 INFO L427 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:00:22,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:00:22,056 INFO L82 PathProgramCache]: Analyzing trace with hash 392703766, now seen corresponding path program 52 times [2020-08-22 20:00:22,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:00:22,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875464999] [2020-08-22 20:00:22,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:00:22,064 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:00:22,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:00:28,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:00:28,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:00:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:00:28,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875464999] [2020-08-22 20:00:28,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:00:28,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2020-08-22 20:00:28,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527930612] [2020-08-22 20:00:28,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-08-22 20:00:28,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:00:28,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-08-22 20:00:28,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-08-22 20:00:28,924 INFO L87 Difference]: Start difference. First operand 478 states and 479 transitions. Second operand 55 states. [2020-08-22 20:00:38,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 20:00:38,651 INFO L93 Difference]: Finished difference Result 502 states and 504 transitions. [2020-08-22 20:00:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-08-22 20:00:38,657 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 474 [2020-08-22 20:00:38,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 20:00:38,659 INFO L225 Difference]: With dead ends: 502 [2020-08-22 20:00:38,659 INFO L226 Difference]: Without dead ends: 494 [2020-08-22 20:00:38,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2020-08-22 20:00:38,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2020-08-22 20:00:38,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 484. [2020-08-22 20:00:38,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 484 states. [2020-08-22 20:00:38,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 485 transitions. [2020-08-22 20:00:38,805 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 485 transitions. Word has length 474 [2020-08-22 20:00:38,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 20:00:38,805 INFO L479 AbstractCegarLoop]: Abstraction has 484 states and 485 transitions. [2020-08-22 20:00:38,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-08-22 20:00:38,805 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 485 transitions. [2020-08-22 20:00:38,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-08-22 20:00:38,817 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 20:00:38,817 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] [2020-08-22 20:00:38,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2020-08-22 20:00:38,817 INFO L427 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 20:00:38,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 20:00:38,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1947144295, now seen corresponding path program 50 times [2020-08-22 20:00:38,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 20:00:38,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629021136] [2020-08-22 20:00:38,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 20:00:38,825 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 20:00:38,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:00:59,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 20:00:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 20:01:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 20:01:00,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629021136] [2020-08-22 20:01:00,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 20:01:00,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2020-08-22 20:01:00,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033570754] [2020-08-22 20:01:00,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 107 states [2020-08-22 20:01:00,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 20:01:00,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2020-08-22 20:01:00,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=11080, Unknown=0, NotChecked=0, Total=11342 [2020-08-22 20:01:00,088 INFO L87 Difference]: Start difference. First operand 484 states and 485 transitions. Second operand 107 states.