/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:29:08,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:29:08,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:29:09,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:29:09,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:29:09,052 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:29:09,054 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:29:09,057 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:29:09,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:29:09,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:29:09,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:29:09,110 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:29:09,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:29:09,123 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:29:09,127 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:29:09,128 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:29:09,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:29:09,150 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:29:09,151 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:29:09,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:29:09,153 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:29:09,179 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:29:09,179 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:29:09,185 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:29:09,185 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:29:09,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:29:09,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:29:09,186 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:29:09,186 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:29:09,186 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:29:09,186 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:29:09,188 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:29:09,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:29:09,188 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:29:09,189 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:29:09,189 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:29:09,189 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:29:09,189 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:29:09,190 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:29:09,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:29:09,190 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:29:09,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:29:09,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:29:09,191 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:29:09,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:29:09,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:29:09,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:29:09,701 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:29:09,702 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:29:09,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-10-24 02:29:09,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d12c844cf/69416d01e2314461a896a68a9337ccd1/FLAG59f35cbda [2020-10-24 02:29:10,484 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:29:10,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-10-24 02:29:10,493 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d12c844cf/69416d01e2314461a896a68a9337ccd1/FLAG59f35cbda [2020-10-24 02:29:10,863 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d12c844cf/69416d01e2314461a896a68a9337ccd1 [2020-10-24 02:29:10,867 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:29:10,875 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:29:10,876 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:29:10,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:29:10,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:29:10,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:29:10" (1/1) ... [2020-10-24 02:29:10,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@614eea74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:10, skipping insertion in model container [2020-10-24 02:29:10,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:29:10" (1/1) ... [2020-10-24 02:29:10,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:29:10,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:29:11,079 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:29:11,090 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:29:11,107 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:29:11,124 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:29:11,125 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:11 WrapperNode [2020-10-24 02:29:11,125 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:29:11,126 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:29:11,126 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:29:11,127 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:29:11,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:11" (1/1) ... [2020-10-24 02:29:11,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:11" (1/1) ... [2020-10-24 02:29:11,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:11" (1/1) ... [2020-10-24 02:29:11,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:11" (1/1) ... [2020-10-24 02:29:11,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:11" (1/1) ... [2020-10-24 02:29:11,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:11" (1/1) ... [2020-10-24 02:29:11,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:11" (1/1) ... [2020-10-24 02:29:11,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:29:11,210 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:29:11,212 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:29:11,212 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:29:11,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:11" (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 [2020-10-24 02:29:11,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:29:11,313 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:29:11,314 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:29:11,314 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:29:11,314 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:29:11,314 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:29:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:29:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:29:11,315 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 02:29:11,316 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 02:29:11,317 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:29:11,317 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:29:11,317 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:29:11,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:29:11,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:29:11,318 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:29:11,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:29:11,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:29:11,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:29:11,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:29:11,319 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:29:11,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:29:11,727 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:29:11,728 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:29:11,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:29:11 BoogieIcfgContainer [2020-10-24 02:29:11,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:29:11,734 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:29:11,735 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:29:11,739 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:29:11,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:29:10" (1/3) ... [2020-10-24 02:29:11,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d3141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:29:11, skipping insertion in model container [2020-10-24 02:29:11,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:11" (2/3) ... [2020-10-24 02:29:11,742 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32d3141 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:29:11, skipping insertion in model container [2020-10-24 02:29:11,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:29:11" (3/3) ... [2020-10-24 02:29:11,744 INFO L111 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-10-24 02:29:11,757 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:29:11,763 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:29:11,777 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:29:11,816 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:29:11,816 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:29:11,817 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:29:11,817 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:29:11,817 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:29:11,817 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:29:11,817 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:29:11,817 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:29:11,840 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-24 02:29:11,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-24 02:29:11,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:11,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:11,857 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:11,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:11,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1975152354, now seen corresponding path program 1 times [2020-10-24 02:29:11,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:11,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2122229457] [2020-10-24 02:29:11,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:12,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2122229457] [2020-10-24 02:29:12,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:29:12,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:29:12,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720560776] [2020-10-24 02:29:12,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:29:12,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:12,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:29:12,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:29:12,174 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-10-24 02:29:12,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:12,311 INFO L93 Difference]: Finished difference Result 56 states and 63 transitions. [2020-10-24 02:29:12,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:29:12,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-24 02:29:12,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:12,322 INFO L225 Difference]: With dead ends: 56 [2020-10-24 02:29:12,322 INFO L226 Difference]: Without dead ends: 31 [2020-10-24 02:29:12,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:29:12,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-24 02:29:12,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-24 02:29:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-24 02:29:12,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-24 02:29:12,376 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 20 [2020-10-24 02:29:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:12,377 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-24 02:29:12,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:29:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-24 02:29:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-24 02:29:12,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:12,379 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:12,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:29:12,379 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:12,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:12,380 INFO L82 PathProgramCache]: Analyzing trace with hash 1632308722, now seen corresponding path program 1 times [2020-10-24 02:29:12,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:12,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129609450] [2020-10-24 02:29:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:12,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129609450] [2020-10-24 02:29:12,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:29:12,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-24 02:29:12,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47644045] [2020-10-24 02:29:12,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:29:12,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:12,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:29:12,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:29:12,582 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 7 states. [2020-10-24 02:29:12,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:12,869 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2020-10-24 02:29:12,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 02:29:12,870 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-10-24 02:29:12,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:12,871 INFO L225 Difference]: With dead ends: 49 [2020-10-24 02:29:12,871 INFO L226 Difference]: Without dead ends: 40 [2020-10-24 02:29:12,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:29:12,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-24 02:29:12,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-10-24 02:29:12,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-24 02:29:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-10-24 02:29:12,887 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 24 [2020-10-24 02:29:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:12,888 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-10-24 02:29:12,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:29:12,888 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-10-24 02:29:12,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-24 02:29:12,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:12,889 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:12,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:29:12,890 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:12,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:12,891 INFO L82 PathProgramCache]: Analyzing trace with hash -7380593, now seen corresponding path program 1 times [2020-10-24 02:29:12,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:12,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085479550] [2020-10-24 02:29:12,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:12,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:12,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085479550] [2020-10-24 02:29:12,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:29:12,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:29:12,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281536344] [2020-10-24 02:29:12,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:29:12,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:12,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:29:12,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:29:12,968 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 4 states. [2020-10-24 02:29:13,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:13,086 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-10-24 02:29:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 02:29:13,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-24 02:29:13,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:13,087 INFO L225 Difference]: With dead ends: 56 [2020-10-24 02:29:13,088 INFO L226 Difference]: Without dead ends: 37 [2020-10-24 02:29:13,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:29:13,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-24 02:29:13,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-24 02:29:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-24 02:29:13,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-10-24 02:29:13,100 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2020-10-24 02:29:13,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:13,100 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-10-24 02:29:13,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:29:13,101 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-10-24 02:29:13,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-24 02:29:13,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:13,102 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:13,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:29:13,103 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:13,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:13,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1203694188, now seen corresponding path program 1 times [2020-10-24 02:29:13,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:13,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766088581] [2020-10-24 02:29:13,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:13,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:13,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:13,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766088581] [2020-10-24 02:29:13,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:13,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 02:29:13,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628667893] [2020-10-24 02:29:13,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:29:13,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:13,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:29:13,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:29:13,193 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 6 states. [2020-10-24 02:29:13,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:13,475 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-10-24 02:29:13,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 02:29:13,475 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-24 02:29:13,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:13,478 INFO L225 Difference]: With dead ends: 63 [2020-10-24 02:29:13,479 INFO L226 Difference]: Without dead ends: 53 [2020-10-24 02:29:13,479 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:29:13,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-24 02:29:13,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2020-10-24 02:29:13,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-24 02:29:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-24 02:29:13,492 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 33 [2020-10-24 02:29:13,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:13,493 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-24 02:29:13,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:29:13,493 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-24 02:29:13,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-24 02:29:13,494 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:13,494 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:13,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:29:13,495 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:13,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:13,495 INFO L82 PathProgramCache]: Analyzing trace with hash -944784977, now seen corresponding path program 1 times [2020-10-24 02:29:13,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:13,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129780447] [2020-10-24 02:29:13,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:13,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:13,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129780447] [2020-10-24 02:29:13,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:13,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 02:29:13,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555791122] [2020-10-24 02:29:13,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:29:13,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:13,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:29:13,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:29:13,663 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 8 states. [2020-10-24 02:29:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:13,992 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-10-24 02:29:13,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 02:29:13,992 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-24 02:29:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:13,994 INFO L225 Difference]: With dead ends: 58 [2020-10-24 02:29:13,994 INFO L226 Difference]: Without dead ends: 49 [2020-10-24 02:29:13,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:29:13,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-24 02:29:14,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-10-24 02:29:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-24 02:29:14,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2020-10-24 02:29:14,008 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 35 [2020-10-24 02:29:14,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:14,009 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2020-10-24 02:29:14,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:29:14,009 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2020-10-24 02:29:14,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-24 02:29:14,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:14,011 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:14,011 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:29:14,011 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:14,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:14,012 INFO L82 PathProgramCache]: Analyzing trace with hash 2061662002, now seen corresponding path program 2 times [2020-10-24 02:29:14,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:14,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629643976] [2020-10-24 02:29:14,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:14,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:14,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:14,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629643976] [2020-10-24 02:29:14,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:14,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 02:29:14,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398363780] [2020-10-24 02:29:14,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:29:14,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:14,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:29:14,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:29:14,152 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 7 states. [2020-10-24 02:29:14,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:14,522 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-24 02:29:14,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 02:29:14,523 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-10-24 02:29:14,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:14,524 INFO L225 Difference]: With dead ends: 72 [2020-10-24 02:29:14,524 INFO L226 Difference]: Without dead ends: 62 [2020-10-24 02:29:14,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:29:14,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-24 02:29:14,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 52. [2020-10-24 02:29:14,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-24 02:29:14,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2020-10-24 02:29:14,540 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 42 [2020-10-24 02:29:14,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:14,541 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2020-10-24 02:29:14,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:29:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2020-10-24 02:29:14,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-24 02:29:14,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:14,543 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:14,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:29:14,543 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:14,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:14,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1071436555, now seen corresponding path program 2 times [2020-10-24 02:29:14,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:14,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029217557] [2020-10-24 02:29:14,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:14,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:14,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:14,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029217557] [2020-10-24 02:29:14,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:14,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:29:14,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946529679] [2020-10-24 02:29:14,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:29:14,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:14,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:29:14,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:29:14,732 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 10 states. [2020-10-24 02:29:15,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:15,165 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-10-24 02:29:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 02:29:15,165 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-24 02:29:15,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:15,168 INFO L225 Difference]: With dead ends: 67 [2020-10-24 02:29:15,168 INFO L226 Difference]: Without dead ends: 58 [2020-10-24 02:29:15,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:29:15,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-24 02:29:15,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2020-10-24 02:29:15,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-24 02:29:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-24 02:29:15,198 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 44 [2020-10-24 02:29:15,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:15,199 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-24 02:29:15,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:29:15,199 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-24 02:29:15,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-24 02:29:15,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:15,202 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:15,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:29:15,203 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:15,203 INFO L82 PathProgramCache]: Analyzing trace with hash 969533740, now seen corresponding path program 3 times [2020-10-24 02:29:15,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:15,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1353296098] [2020-10-24 02:29:15,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:15,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:15,349 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:15,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1353296098] [2020-10-24 02:29:15,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:15,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 02:29:15,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019333230] [2020-10-24 02:29:15,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:29:15,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:15,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:29:15,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:29:15,353 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 8 states. [2020-10-24 02:29:15,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:15,782 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2020-10-24 02:29:15,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-24 02:29:15,784 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-10-24 02:29:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:15,787 INFO L225 Difference]: With dead ends: 81 [2020-10-24 02:29:15,787 INFO L226 Difference]: Without dead ends: 71 [2020-10-24 02:29:15,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:29:15,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-24 02:29:15,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 61. [2020-10-24 02:29:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-24 02:29:15,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2020-10-24 02:29:15,817 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 51 [2020-10-24 02:29:15,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:15,819 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2020-10-24 02:29:15,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:29:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2020-10-24 02:29:15,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-24 02:29:15,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:15,825 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:15,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:29:15,825 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:15,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:15,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1660291183, now seen corresponding path program 3 times [2020-10-24 02:29:15,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:15,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099828530] [2020-10-24 02:29:15,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:16,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:16,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099828530] [2020-10-24 02:29:16,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:16,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:29:16,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525391444] [2020-10-24 02:29:16,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:29:16,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:16,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:29:16,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:29:16,038 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand 12 states. [2020-10-24 02:29:16,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:16,825 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2020-10-24 02:29:16,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-24 02:29:16,826 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-10-24 02:29:16,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:16,828 INFO L225 Difference]: With dead ends: 89 [2020-10-24 02:29:16,828 INFO L226 Difference]: Without dead ends: 76 [2020-10-24 02:29:16,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-10-24 02:29:16,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-24 02:29:16,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 73. [2020-10-24 02:29:16,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-24 02:29:16,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-10-24 02:29:16,854 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 53 [2020-10-24 02:29:16,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:16,854 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-10-24 02:29:16,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:29:16,854 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-10-24 02:29:16,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-24 02:29:16,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:16,856 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:16,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:29:16,856 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:16,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:16,856 INFO L82 PathProgramCache]: Analyzing trace with hash -904218644, now seen corresponding path program 4 times [2020-10-24 02:29:16,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:16,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541663430] [2020-10-24 02:29:16,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:17,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:17,027 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:17,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541663430] [2020-10-24 02:29:17,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:17,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:29:17,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373673510] [2020-10-24 02:29:17,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:29:17,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:17,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:29:17,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:29:17,031 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 10 states. [2020-10-24 02:29:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:17,694 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2020-10-24 02:29:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 02:29:17,695 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-24 02:29:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:17,697 INFO L225 Difference]: With dead ends: 99 [2020-10-24 02:29:17,697 INFO L226 Difference]: Without dead ends: 89 [2020-10-24 02:29:17,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2020-10-24 02:29:17,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-24 02:29:17,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-10-24 02:29:17,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-24 02:29:17,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-24 02:29:17,748 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 69 [2020-10-24 02:29:17,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:17,749 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-24 02:29:17,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:29:17,749 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-24 02:29:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-24 02:29:17,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:17,755 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:17,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:29:17,756 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:17,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:17,756 INFO L82 PathProgramCache]: Analyzing trace with hash 575547183, now seen corresponding path program 4 times [2020-10-24 02:29:17,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:17,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546216223] [2020-10-24 02:29:17,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:18,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:18,071 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:18,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546216223] [2020-10-24 02:29:18,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:18,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 02:29:18,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137627268] [2020-10-24 02:29:18,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 02:29:18,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:18,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 02:29:18,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:29:18,076 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 16 states. [2020-10-24 02:29:19,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:19,139 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2020-10-24 02:29:19,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-24 02:29:19,140 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-10-24 02:29:19,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:19,141 INFO L225 Difference]: With dead ends: 107 [2020-10-24 02:29:19,141 INFO L226 Difference]: Without dead ends: 94 [2020-10-24 02:29:19,143 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2020-10-24 02:29:19,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-24 02:29:19,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-10-24 02:29:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-24 02:29:19,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-24 02:29:19,184 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 71 [2020-10-24 02:29:19,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:19,185 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-24 02:29:19,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 02:29:19,185 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-24 02:29:19,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-24 02:29:19,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:19,189 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:19,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 02:29:19,190 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:19,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1088247468, now seen corresponding path program 5 times [2020-10-24 02:29:19,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:19,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066070683] [2020-10-24 02:29:19,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:19,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:19,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:19,410 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 7 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:19,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066070683] [2020-10-24 02:29:19,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:19,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:29:19,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137677374] [2020-10-24 02:29:19,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:29:19,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:19,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:29:19,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:29:19,414 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 12 states. [2020-10-24 02:29:20,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:20,198 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2020-10-24 02:29:20,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-24 02:29:20,199 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 87 [2020-10-24 02:29:20,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:20,200 INFO L225 Difference]: With dead ends: 117 [2020-10-24 02:29:20,201 INFO L226 Difference]: Without dead ends: 107 [2020-10-24 02:29:20,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=531, Unknown=0, NotChecked=0, Total=812 [2020-10-24 02:29:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-24 02:29:20,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 97. [2020-10-24 02:29:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-24 02:29:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2020-10-24 02:29:20,238 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 87 [2020-10-24 02:29:20,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:20,238 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2020-10-24 02:29:20,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:29:20,238 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2020-10-24 02:29:20,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-24 02:29:20,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:20,250 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:20,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 02:29:20,250 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:20,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:20,251 INFO L82 PathProgramCache]: Analyzing trace with hash -219933201, now seen corresponding path program 5 times [2020-10-24 02:29:20,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:20,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199437606] [2020-10-24 02:29:20,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:20,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:20,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:20,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199437606] [2020-10-24 02:29:20,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:20,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-24 02:29:20,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480360453] [2020-10-24 02:29:20,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-24 02:29:20,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:20,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-24 02:29:20,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:29:20,638 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand 20 states. [2020-10-24 02:29:22,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:22,147 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2020-10-24 02:29:22,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-24 02:29:22,147 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 89 [2020-10-24 02:29:22,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:22,149 INFO L225 Difference]: With dead ends: 125 [2020-10-24 02:29:22,149 INFO L226 Difference]: Without dead ends: 112 [2020-10-24 02:29:22,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=159, Invalid=1323, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 02:29:22,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-24 02:29:22,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2020-10-24 02:29:22,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-24 02:29:22,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2020-10-24 02:29:22,188 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 89 [2020-10-24 02:29:22,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:22,188 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2020-10-24 02:29:22,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-24 02:29:22,188 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2020-10-24 02:29:22,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-24 02:29:22,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:22,190 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:22,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 02:29:22,190 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:22,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:22,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1287797396, now seen corresponding path program 6 times [2020-10-24 02:29:22,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:22,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780255728] [2020-10-24 02:29:22,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:22,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:22,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:22,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:22,419 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 9 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:22,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780255728] [2020-10-24 02:29:22,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:22,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-24 02:29:22,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396187396] [2020-10-24 02:29:22,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 02:29:22,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:22,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 02:29:22,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:29:22,422 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand 14 states. [2020-10-24 02:29:23,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:23,459 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2020-10-24 02:29:23,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 02:29:23,460 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 105 [2020-10-24 02:29:23,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:23,462 INFO L225 Difference]: With dead ends: 135 [2020-10-24 02:29:23,462 INFO L226 Difference]: Without dead ends: 125 [2020-10-24 02:29:23,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=781, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 02:29:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-24 02:29:23,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2020-10-24 02:29:23,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-24 02:29:23,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2020-10-24 02:29:23,497 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 105 [2020-10-24 02:29:23,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:23,498 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2020-10-24 02:29:23,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 02:29:23,498 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2020-10-24 02:29:23,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-24 02:29:23,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:23,499 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:23,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 02:29:23,500 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:23,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:23,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1323553967, now seen corresponding path program 6 times [2020-10-24 02:29:23,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:23,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895806970] [2020-10-24 02:29:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:23,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:23,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:23,965 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:23,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895806970] [2020-10-24 02:29:23,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:23,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-24 02:29:23,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604317015] [2020-10-24 02:29:23,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-24 02:29:23,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:23,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-24 02:29:23,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2020-10-24 02:29:23,968 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 24 states. [2020-10-24 02:29:25,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:25,989 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2020-10-24 02:29:25,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-24 02:29:25,990 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 107 [2020-10-24 02:29:25,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:25,991 INFO L225 Difference]: With dead ends: 143 [2020-10-24 02:29:25,992 INFO L226 Difference]: Without dead ends: 130 [2020-10-24 02:29:25,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=195, Invalid=1967, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 02:29:25,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-24 02:29:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-10-24 02:29:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-24 02:29:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-10-24 02:29:26,024 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 107 [2020-10-24 02:29:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:26,024 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-10-24 02:29:26,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-24 02:29:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-10-24 02:29:26,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-24 02:29:26,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:26,026 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:26,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 02:29:26,027 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:26,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:26,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1016593364, now seen corresponding path program 7 times [2020-10-24 02:29:26,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:26,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482898713] [2020-10-24 02:29:26,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:26,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:26,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 11 proven. 517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:26,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482898713] [2020-10-24 02:29:26,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:26,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 02:29:26,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141837470] [2020-10-24 02:29:26,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 02:29:26,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:26,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 02:29:26,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:29:26,270 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 16 states. [2020-10-24 02:29:27,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:27,539 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2020-10-24 02:29:27,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-24 02:29:27,539 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 123 [2020-10-24 02:29:27,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:27,541 INFO L225 Difference]: With dead ends: 153 [2020-10-24 02:29:27,541 INFO L226 Difference]: Without dead ends: 143 [2020-10-24 02:29:27,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=561, Invalid=1079, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 02:29:27,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-24 02:29:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 133. [2020-10-24 02:29:27,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-24 02:29:27,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-10-24 02:29:27,575 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 123 [2020-10-24 02:29:27,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:27,576 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-10-24 02:29:27,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 02:29:27,576 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-10-24 02:29:27,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-24 02:29:27,577 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:27,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:27,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 02:29:27,578 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:27,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:27,578 INFO L82 PathProgramCache]: Analyzing trace with hash -42376337, now seen corresponding path program 7 times [2020-10-24 02:29:27,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:27,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046735798] [2020-10-24 02:29:27,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:28,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:28,135 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 0 proven. 550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:28,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046735798] [2020-10-24 02:29:28,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:28,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-24 02:29:28,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179958916] [2020-10-24 02:29:28,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-24 02:29:28,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:28,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-24 02:29:28,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=692, Unknown=0, NotChecked=0, Total=756 [2020-10-24 02:29:28,141 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 28 states. [2020-10-24 02:29:30,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:30,730 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2020-10-24 02:29:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 02:29:30,731 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 125 [2020-10-24 02:29:30,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:30,732 INFO L225 Difference]: With dead ends: 161 [2020-10-24 02:29:30,732 INFO L226 Difference]: Without dead ends: 148 [2020-10-24 02:29:30,734 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=231, Invalid=2739, Unknown=0, NotChecked=0, Total=2970 [2020-10-24 02:29:30,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-24 02:29:30,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 145. [2020-10-24 02:29:30,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-24 02:29:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2020-10-24 02:29:30,779 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 125 [2020-10-24 02:29:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:30,780 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2020-10-24 02:29:30,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-24 02:29:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2020-10-24 02:29:30,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-24 02:29:30,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:30,782 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:30,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 02:29:30,782 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:30,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:30,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1619530476, now seen corresponding path program 8 times [2020-10-24 02:29:30,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:30,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470062800] [2020-10-24 02:29:30,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:31,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 13 proven. 728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:31,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470062800] [2020-10-24 02:29:31,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:31,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:29:31,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313754650] [2020-10-24 02:29:31,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:29:31,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:31,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:29:31,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:29:31,071 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 18 states. [2020-10-24 02:29:32,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:32,666 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2020-10-24 02:29:32,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-24 02:29:32,667 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 141 [2020-10-24 02:29:32,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:32,668 INFO L225 Difference]: With dead ends: 171 [2020-10-24 02:29:32,669 INFO L226 Difference]: Without dead ends: 161 [2020-10-24 02:29:32,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=737, Invalid=1425, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 02:29:32,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-24 02:29:32,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 151. [2020-10-24 02:29:32,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-24 02:29:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2020-10-24 02:29:32,709 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 141 [2020-10-24 02:29:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:32,709 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2020-10-24 02:29:32,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:29:32,710 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2020-10-24 02:29:32,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-10-24 02:29:32,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:32,711 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:32,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 02:29:32,711 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:32,712 INFO L82 PathProgramCache]: Analyzing trace with hash -758070737, now seen corresponding path program 8 times [2020-10-24 02:29:32,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:32,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802447283] [2020-10-24 02:29:32,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:33,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:33,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 0 proven. 767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:33,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802447283] [2020-10-24 02:29:33,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:33,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-24 02:29:33,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166200537] [2020-10-24 02:29:33,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-24 02:29:33,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:33,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-24 02:29:33,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=918, Unknown=0, NotChecked=0, Total=992 [2020-10-24 02:29:33,517 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 32 states. [2020-10-24 02:29:37,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:37,024 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2020-10-24 02:29:37,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-24 02:29:37,026 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 143 [2020-10-24 02:29:37,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:37,027 INFO L225 Difference]: With dead ends: 179 [2020-10-24 02:29:37,027 INFO L226 Difference]: Without dead ends: 166 [2020-10-24 02:29:37,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=267, Invalid=3639, Unknown=0, NotChecked=0, Total=3906 [2020-10-24 02:29:37,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-24 02:29:37,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2020-10-24 02:29:37,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-24 02:29:37,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2020-10-24 02:29:37,062 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 143 [2020-10-24 02:29:37,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:37,062 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2020-10-24 02:29:37,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-24 02:29:37,063 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2020-10-24 02:29:37,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-24 02:29:37,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:37,065 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:37,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-24 02:29:37,065 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:37,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:37,066 INFO L82 PathProgramCache]: Analyzing trace with hash -2033585748, now seen corresponding path program 9 times [2020-10-24 02:29:37,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:37,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69281322] [2020-10-24 02:29:37,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:37,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:37,415 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 15 proven. 975 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:37,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69281322] [2020-10-24 02:29:37,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:37,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-24 02:29:37,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840624841] [2020-10-24 02:29:37,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-24 02:29:37,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:37,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-24 02:29:37,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:29:37,417 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 20 states. [2020-10-24 02:29:39,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:39,221 INFO L93 Difference]: Finished difference Result 189 states and 191 transitions. [2020-10-24 02:29:39,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 02:29:39,221 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 159 [2020-10-24 02:29:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:39,223 INFO L225 Difference]: With dead ends: 189 [2020-10-24 02:29:39,223 INFO L226 Difference]: Without dead ends: 179 [2020-10-24 02:29:39,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=937, Invalid=1819, Unknown=0, NotChecked=0, Total=2756 [2020-10-24 02:29:39,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-24 02:29:39,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 169. [2020-10-24 02:29:39,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-24 02:29:39,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2020-10-24 02:29:39,272 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 159 [2020-10-24 02:29:39,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:39,273 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2020-10-24 02:29:39,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-24 02:29:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2020-10-24 02:29:39,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-24 02:29:39,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:39,275 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:39,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-24 02:29:39,276 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:39,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:39,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1880486127, now seen corresponding path program 9 times [2020-10-24 02:29:39,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:39,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089756565] [2020-10-24 02:29:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:40,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 0 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:40,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089756565] [2020-10-24 02:29:40,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:40,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-24 02:29:40,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232569924] [2020-10-24 02:29:40,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-24 02:29:40,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:40,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-24 02:29:40,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1176, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 02:29:40,222 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand 36 states. [2020-10-24 02:29:44,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:44,476 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2020-10-24 02:29:44,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-24 02:29:44,477 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 161 [2020-10-24 02:29:44,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:44,479 INFO L225 Difference]: With dead ends: 197 [2020-10-24 02:29:44,479 INFO L226 Difference]: Without dead ends: 184 [2020-10-24 02:29:44,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=303, Invalid=4667, Unknown=0, NotChecked=0, Total=4970 [2020-10-24 02:29:44,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-24 02:29:44,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 181. [2020-10-24 02:29:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-24 02:29:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2020-10-24 02:29:44,522 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 161 [2020-10-24 02:29:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:44,522 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2020-10-24 02:29:44,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-24 02:29:44,522 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2020-10-24 02:29:44,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-24 02:29:44,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:44,524 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:44,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-24 02:29:44,524 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:44,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:44,524 INFO L82 PathProgramCache]: Analyzing trace with hash -10903444, now seen corresponding path program 10 times [2020-10-24 02:29:44,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:44,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710813334] [2020-10-24 02:29:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:44,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:44,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 17 proven. 1258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:44,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710813334] [2020-10-24 02:29:44,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:44,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-24 02:29:44,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410695810] [2020-10-24 02:29:44,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 02:29:44,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:44,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 02:29:44,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-10-24 02:29:44,920 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand 22 states. [2020-10-24 02:29:47,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:47,161 INFO L93 Difference]: Finished difference Result 207 states and 209 transitions. [2020-10-24 02:29:47,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-24 02:29:47,165 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 177 [2020-10-24 02:29:47,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:47,167 INFO L225 Difference]: With dead ends: 207 [2020-10-24 02:29:47,167 INFO L226 Difference]: Without dead ends: 197 [2020-10-24 02:29:47,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1161, Invalid=2261, Unknown=0, NotChecked=0, Total=3422 [2020-10-24 02:29:47,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-24 02:29:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2020-10-24 02:29:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-24 02:29:47,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2020-10-24 02:29:47,209 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 177 [2020-10-24 02:29:47,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:47,210 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2020-10-24 02:29:47,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 02:29:47,210 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2020-10-24 02:29:47,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-24 02:29:47,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:47,211 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:47,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-24 02:29:47,211 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:47,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:47,212 INFO L82 PathProgramCache]: Analyzing trace with hash 57995183, now seen corresponding path program 10 times [2020-10-24 02:29:47,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:47,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293349848] [2020-10-24 02:29:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:47,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:48,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 0 proven. 1309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:48,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293349848] [2020-10-24 02:29:48,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:48,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-24 02:29:48,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202055099] [2020-10-24 02:29:48,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-24 02:29:48,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:48,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-24 02:29:48,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1466, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 02:29:48,363 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 40 states. [2020-10-24 02:29:53,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:53,546 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2020-10-24 02:29:53,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-24 02:29:53,547 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 179 [2020-10-24 02:29:53,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:53,549 INFO L225 Difference]: With dead ends: 215 [2020-10-24 02:29:53,549 INFO L226 Difference]: Without dead ends: 202 [2020-10-24 02:29:53,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1589 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=339, Invalid=5823, Unknown=0, NotChecked=0, Total=6162 [2020-10-24 02:29:53,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-24 02:29:53,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2020-10-24 02:29:53,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-24 02:29:53,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2020-10-24 02:29:53,600 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 179 [2020-10-24 02:29:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:53,601 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2020-10-24 02:29:53,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-24 02:29:53,601 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2020-10-24 02:29:53,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-24 02:29:53,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:53,602 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:53,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-24 02:29:53,602 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:53,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:53,603 INFO L82 PathProgramCache]: Analyzing trace with hash 543366956, now seen corresponding path program 11 times [2020-10-24 02:29:53,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:53,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [662619232] [2020-10-24 02:29:53,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:53,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:54,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:54,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 19 proven. 1577 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:54,091 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [662619232] [2020-10-24 02:29:54,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:54,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-24 02:29:54,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325908193] [2020-10-24 02:29:54,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-24 02:29:54,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:54,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-24 02:29:54,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-10-24 02:29:54,093 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 24 states. [2020-10-24 02:29:56,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:56,652 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2020-10-24 02:29:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-24 02:29:56,653 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 195 [2020-10-24 02:29:56,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:56,656 INFO L225 Difference]: With dead ends: 225 [2020-10-24 02:29:56,656 INFO L226 Difference]: Without dead ends: 215 [2020-10-24 02:29:56,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1409, Invalid=2751, Unknown=0, NotChecked=0, Total=4160 [2020-10-24 02:29:56,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-24 02:29:56,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 205. [2020-10-24 02:29:56,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-10-24 02:29:56,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2020-10-24 02:29:56,706 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 195 [2020-10-24 02:29:56,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:56,707 INFO L481 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2020-10-24 02:29:56,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-24 02:29:56,707 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2020-10-24 02:29:56,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-24 02:29:56,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:56,708 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:56,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-24 02:29:56,708 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:56,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:56,709 INFO L82 PathProgramCache]: Analyzing trace with hash 135904879, now seen corresponding path program 11 times [2020-10-24 02:29:56,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:56,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006252969] [2020-10-24 02:29:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:56,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:57,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:57,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:58,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006252969] [2020-10-24 02:29:58,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:58,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-24 02:29:58,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074136510] [2020-10-24 02:29:58,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-24 02:29:58,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:58,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-24 02:29:58,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1788, Unknown=0, NotChecked=0, Total=1892 [2020-10-24 02:29:58,061 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand 44 states. [2020-10-24 02:30:04,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:04,252 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2020-10-24 02:30:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-24 02:30:04,253 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 197 [2020-10-24 02:30:04,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:04,255 INFO L225 Difference]: With dead ends: 233 [2020-10-24 02:30:04,255 INFO L226 Difference]: Without dead ends: 220 [2020-10-24 02:30:04,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=375, Invalid=7107, Unknown=0, NotChecked=0, Total=7482 [2020-10-24 02:30:04,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-24 02:30:04,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-10-24 02:30:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-24 02:30:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2020-10-24 02:30:04,332 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 197 [2020-10-24 02:30:04,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:04,333 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2020-10-24 02:30:04,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-24 02:30:04,333 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2020-10-24 02:30:04,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-24 02:30:04,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:04,334 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:04,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-24 02:30:04,335 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:04,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:04,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1928172052, now seen corresponding path program 12 times [2020-10-24 02:30:04,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:04,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839158944] [2020-10-24 02:30:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:04,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:04,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:04,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 21 proven. 1932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:04,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839158944] [2020-10-24 02:30:04,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:04,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-24 02:30:04,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504209593] [2020-10-24 02:30:04,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-24 02:30:04,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:04,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-24 02:30:04,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-10-24 02:30:04,869 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand 26 states. [2020-10-24 02:30:07,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:07,698 INFO L93 Difference]: Finished difference Result 243 states and 245 transitions. [2020-10-24 02:30:07,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-24 02:30:07,699 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 213 [2020-10-24 02:30:07,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:07,703 INFO L225 Difference]: With dead ends: 243 [2020-10-24 02:30:07,703 INFO L226 Difference]: Without dead ends: 233 [2020-10-24 02:30:07,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1681, Invalid=3289, Unknown=0, NotChecked=0, Total=4970 [2020-10-24 02:30:07,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-24 02:30:07,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 223. [2020-10-24 02:30:07,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-24 02:30:07,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2020-10-24 02:30:07,786 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 213 [2020-10-24 02:30:07,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:07,787 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2020-10-24 02:30:07,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-24 02:30:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2020-10-24 02:30:07,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-24 02:30:07,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:07,788 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:07,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-24 02:30:07,789 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:07,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:07,792 INFO L82 PathProgramCache]: Analyzing trace with hash 103832879, now seen corresponding path program 12 times [2020-10-24 02:30:07,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:07,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984332366] [2020-10-24 02:30:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:07,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:09,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:09,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:09,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1995 backedges. 0 proven. 1995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:09,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984332366] [2020-10-24 02:30:09,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:09,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-24 02:30:09,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357352023] [2020-10-24 02:30:09,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-24 02:30:09,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:09,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-24 02:30:09,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=2142, Unknown=0, NotChecked=0, Total=2256 [2020-10-24 02:30:09,422 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand 48 states. [2020-10-24 02:30:16,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:16,628 INFO L93 Difference]: Finished difference Result 251 states and 254 transitions. [2020-10-24 02:30:16,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-24 02:30:16,628 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 215 [2020-10-24 02:30:16,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:16,631 INFO L225 Difference]: With dead ends: 251 [2020-10-24 02:30:16,631 INFO L226 Difference]: Without dead ends: 238 [2020-10-24 02:30:16,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2381 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=411, Invalid=8519, Unknown=0, NotChecked=0, Total=8930 [2020-10-24 02:30:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-24 02:30:16,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 235. [2020-10-24 02:30:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-24 02:30:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2020-10-24 02:30:16,719 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 215 [2020-10-24 02:30:16,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:16,720 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2020-10-24 02:30:16,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-24 02:30:16,720 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2020-10-24 02:30:16,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-24 02:30:16,721 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:16,721 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:16,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-24 02:30:16,721 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:16,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:16,722 INFO L82 PathProgramCache]: Analyzing trace with hash -174879572, now seen corresponding path program 13 times [2020-10-24 02:30:16,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:16,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249359584] [2020-10-24 02:30:16,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:16,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:17,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:17,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:17,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 23 proven. 2323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:17,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249359584] [2020-10-24 02:30:17,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:17,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-24 02:30:17,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171966729] [2020-10-24 02:30:17,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-24 02:30:17,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:17,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-24 02:30:17,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-10-24 02:30:17,386 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand 28 states. [2020-10-24 02:30:20,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:20,634 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2020-10-24 02:30:20,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-24 02:30:20,635 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 231 [2020-10-24 02:30:20,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:20,637 INFO L225 Difference]: With dead ends: 261 [2020-10-24 02:30:20,637 INFO L226 Difference]: Without dead ends: 251 [2020-10-24 02:30:20,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1977, Invalid=3875, Unknown=0, NotChecked=0, Total=5852 [2020-10-24 02:30:20,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-24 02:30:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 241. [2020-10-24 02:30:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-24 02:30:20,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2020-10-24 02:30:20,728 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 231 [2020-10-24 02:30:20,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:20,728 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2020-10-24 02:30:20,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-24 02:30:20,728 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2020-10-24 02:30:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-24 02:30:20,730 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:20,730 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:20,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-24 02:30:20,731 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:20,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:20,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1390726127, now seen corresponding path program 13 times [2020-10-24 02:30:20,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:20,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177425785] [2020-10-24 02:30:20,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:22,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:22,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2392 backedges. 0 proven. 2392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:22,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177425785] [2020-10-24 02:30:22,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:22,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-24 02:30:22,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083452947] [2020-10-24 02:30:22,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-24 02:30:22,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:22,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-24 02:30:22,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2528, Unknown=0, NotChecked=0, Total=2652 [2020-10-24 02:30:22,587 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand 52 states. [2020-10-24 02:30:31,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:31,069 INFO L93 Difference]: Finished difference Result 269 states and 272 transitions. [2020-10-24 02:30:31,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-24 02:30:31,069 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 233 [2020-10-24 02:30:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:31,072 INFO L225 Difference]: With dead ends: 269 [2020-10-24 02:30:31,072 INFO L226 Difference]: Without dead ends: 256 [2020-10-24 02:30:31,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2837 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=447, Invalid=10059, Unknown=0, NotChecked=0, Total=10506 [2020-10-24 02:30:31,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-10-24 02:30:31,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 253. [2020-10-24 02:30:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-24 02:30:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2020-10-24 02:30:31,145 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 233 [2020-10-24 02:30:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:31,145 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2020-10-24 02:30:31,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-24 02:30:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2020-10-24 02:30:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-24 02:30:31,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:31,147 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:31,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-24 02:30:31,147 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:31,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:31,147 INFO L82 PathProgramCache]: Analyzing trace with hash -686654612, now seen corresponding path program 14 times [2020-10-24 02:30:31,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:31,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814920909] [2020-10-24 02:30:31,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:31,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:31,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 25 proven. 2750 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:31,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814920909] [2020-10-24 02:30:31,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:31,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-24 02:30:31,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950493405] [2020-10-24 02:30:31,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-24 02:30:31,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:31,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-24 02:30:31,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-10-24 02:30:31,913 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand 30 states. [2020-10-24 02:30:35,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:35,548 INFO L93 Difference]: Finished difference Result 279 states and 281 transitions. [2020-10-24 02:30:35,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-24 02:30:35,549 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 249 [2020-10-24 02:30:35,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:35,552 INFO L225 Difference]: With dead ends: 279 [2020-10-24 02:30:35,552 INFO L226 Difference]: Without dead ends: 269 [2020-10-24 02:30:35,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1727 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2297, Invalid=4509, Unknown=0, NotChecked=0, Total=6806 [2020-10-24 02:30:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-24 02:30:35,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 259. [2020-10-24 02:30:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-24 02:30:35,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2020-10-24 02:30:35,632 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 249 [2020-10-24 02:30:35,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:35,633 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2020-10-24 02:30:35,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-24 02:30:35,633 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2020-10-24 02:30:35,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-24 02:30:35,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:35,635 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:35,635 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-24 02:30:35,635 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:35,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:35,635 INFO L82 PathProgramCache]: Analyzing trace with hash -798815569, now seen corresponding path program 14 times [2020-10-24 02:30:35,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:35,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114093511] [2020-10-24 02:30:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:37,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2825 backedges. 0 proven. 2825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:38,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114093511] [2020-10-24 02:30:38,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:38,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-24 02:30:38,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996526614] [2020-10-24 02:30:38,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-24 02:30:38,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:38,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-24 02:30:38,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2946, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 02:30:38,028 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand 56 states. [2020-10-24 02:30:48,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:48,036 INFO L93 Difference]: Finished difference Result 287 states and 290 transitions. [2020-10-24 02:30:48,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-24 02:30:48,036 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 251 [2020-10-24 02:30:48,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:48,038 INFO L225 Difference]: With dead ends: 287 [2020-10-24 02:30:48,039 INFO L226 Difference]: Without dead ends: 274 [2020-10-24 02:30:48,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3333 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=483, Invalid=11727, Unknown=0, NotChecked=0, Total=12210 [2020-10-24 02:30:48,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-10-24 02:30:48,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-10-24 02:30:48,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-24 02:30:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2020-10-24 02:30:48,139 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 251 [2020-10-24 02:30:48,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:48,140 INFO L481 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2020-10-24 02:30:48,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-24 02:30:48,140 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2020-10-24 02:30:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2020-10-24 02:30:48,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:48,142 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:48,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-24 02:30:48,142 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:48,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:48,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1002125868, now seen corresponding path program 15 times [2020-10-24 02:30:48,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:48,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460601035] [2020-10-24 02:30:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:49,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:49,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 27 proven. 3213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:49,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460601035] [2020-10-24 02:30:49,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:49,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-24 02:30:49,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778432399] [2020-10-24 02:30:49,127 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-24 02:30:49,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:49,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-24 02:30:49,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-10-24 02:30:49,127 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand 32 states. [2020-10-24 02:30:53,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:53,176 INFO L93 Difference]: Finished difference Result 297 states and 299 transitions. [2020-10-24 02:30:53,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-24 02:30:53,177 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 267 [2020-10-24 02:30:53,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:53,180 INFO L225 Difference]: With dead ends: 297 [2020-10-24 02:30:53,180 INFO L226 Difference]: Without dead ends: 287 [2020-10-24 02:30:53,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2641, Invalid=5191, Unknown=0, NotChecked=0, Total=7832 [2020-10-24 02:30:53,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-24 02:30:53,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 277. [2020-10-24 02:30:53,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-10-24 02:30:53,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2020-10-24 02:30:53,271 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 267 [2020-10-24 02:30:53,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:53,271 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2020-10-24 02:30:53,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-24 02:30:53,272 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2020-10-24 02:30:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-24 02:30:53,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:53,273 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:30:53,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-24 02:30:53,274 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:53,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:53,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1378412177, now seen corresponding path program 15 times [2020-10-24 02:30:53,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:53,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55580603] [2020-10-24 02:30:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:55,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3294 backedges. 0 proven. 3294 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:30:55,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55580603] [2020-10-24 02:30:55,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:55,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-24 02:30:55,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115888768] [2020-10-24 02:30:55,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-24 02:30:55,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:55,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-24 02:30:55,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=3396, Unknown=0, NotChecked=0, Total=3540 [2020-10-24 02:30:55,807 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand 60 states. [2020-10-24 02:31:06,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:06,554 INFO L93 Difference]: Finished difference Result 305 states and 308 transitions. [2020-10-24 02:31:06,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-24 02:31:06,555 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 269 [2020-10-24 02:31:06,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:06,557 INFO L225 Difference]: With dead ends: 305 [2020-10-24 02:31:06,557 INFO L226 Difference]: Without dead ends: 292 [2020-10-24 02:31:06,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3869 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=519, Invalid=13523, Unknown=0, NotChecked=0, Total=14042 [2020-10-24 02:31:06,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-24 02:31:06,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2020-10-24 02:31:06,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-24 02:31:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2020-10-24 02:31:06,704 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 269 [2020-10-24 02:31:06,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:06,705 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2020-10-24 02:31:06,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-24 02:31:06,705 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2020-10-24 02:31:06,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2020-10-24 02:31:06,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:06,707 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:06,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-24 02:31:06,708 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:06,708 INFO L82 PathProgramCache]: Analyzing trace with hash 2058995948, now seen corresponding path program 16 times [2020-10-24 02:31:06,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:06,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751736511] [2020-10-24 02:31:06,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:06,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:07,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:07,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 29 proven. 3712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:07,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751736511] [2020-10-24 02:31:07,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:07,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-24 02:31:07,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387472589] [2020-10-24 02:31:07,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-24 02:31:07,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:07,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-24 02:31:07,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=622, Unknown=0, NotChecked=0, Total=1122 [2020-10-24 02:31:07,649 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand 34 states. [2020-10-24 02:31:11,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:11,980 INFO L93 Difference]: Finished difference Result 315 states and 317 transitions. [2020-10-24 02:31:11,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-24 02:31:11,980 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 285 [2020-10-24 02:31:11,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:11,982 INFO L225 Difference]: With dead ends: 315 [2020-10-24 02:31:11,982 INFO L226 Difference]: Without dead ends: 305 [2020-10-24 02:31:11,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2293 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3009, Invalid=5921, Unknown=0, NotChecked=0, Total=8930 [2020-10-24 02:31:11,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-10-24 02:31:12,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 295. [2020-10-24 02:31:12,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-24 02:31:12,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2020-10-24 02:31:12,068 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 285 [2020-10-24 02:31:12,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:12,068 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2020-10-24 02:31:12,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-24 02:31:12,068 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2020-10-24 02:31:12,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-10-24 02:31:12,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:12,069 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:12,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-24 02:31:12,070 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:12,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:12,070 INFO L82 PathProgramCache]: Analyzing trace with hash 661452847, now seen corresponding path program 16 times [2020-10-24 02:31:12,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:12,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316929060] [2020-10-24 02:31:12,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:12,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:14,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3799 backedges. 0 proven. 3799 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:15,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316929060] [2020-10-24 02:31:15,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:15,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-24 02:31:15,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206895639] [2020-10-24 02:31:15,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-24 02:31:15,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:15,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-24 02:31:15,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=3878, Unknown=0, NotChecked=0, Total=4032 [2020-10-24 02:31:15,038 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand 64 states. [2020-10-24 02:31:27,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:27,484 INFO L93 Difference]: Finished difference Result 323 states and 326 transitions. [2020-10-24 02:31:27,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-24 02:31:27,489 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 287 [2020-10-24 02:31:27,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:27,491 INFO L225 Difference]: With dead ends: 323 [2020-10-24 02:31:27,492 INFO L226 Difference]: Without dead ends: 310 [2020-10-24 02:31:27,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4445 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=555, Invalid=15447, Unknown=0, NotChecked=0, Total=16002 [2020-10-24 02:31:27,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-10-24 02:31:27,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 307. [2020-10-24 02:31:27,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-10-24 02:31:27,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 308 transitions. [2020-10-24 02:31:27,618 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 308 transitions. Word has length 287 [2020-10-24 02:31:27,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:27,618 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 308 transitions. [2020-10-24 02:31:27,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-24 02:31:27,618 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 308 transitions. [2020-10-24 02:31:27,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-24 02:31:27,619 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:27,620 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:27,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-24 02:31:27,620 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:27,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:27,620 INFO L82 PathProgramCache]: Analyzing trace with hash -130406484, now seen corresponding path program 17 times [2020-10-24 02:31:27,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:27,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1109435338] [2020-10-24 02:31:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:28,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:28,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 31 proven. 4247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:28,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1109435338] [2020-10-24 02:31:28,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:28,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-24 02:31:28,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402224706] [2020-10-24 02:31:28,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-24 02:31:28,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:28,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-24 02:31:28,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=565, Invalid=695, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 02:31:28,722 INFO L87 Difference]: Start difference. First operand 307 states and 308 transitions. Second operand 36 states. [2020-10-24 02:31:33,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:33,711 INFO L93 Difference]: Finished difference Result 333 states and 335 transitions. [2020-10-24 02:31:33,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-24 02:31:33,712 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 303 [2020-10-24 02:31:33,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:33,714 INFO L225 Difference]: With dead ends: 333 [2020-10-24 02:31:33,714 INFO L226 Difference]: Without dead ends: 323 [2020-10-24 02:31:33,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2606 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3401, Invalid=6699, Unknown=0, NotChecked=0, Total=10100 [2020-10-24 02:31:33,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-10-24 02:31:33,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 313. [2020-10-24 02:31:33,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-24 02:31:33,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 314 transitions. [2020-10-24 02:31:33,848 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 314 transitions. Word has length 303 [2020-10-24 02:31:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:33,848 INFO L481 AbstractCegarLoop]: Abstraction has 313 states and 314 transitions. [2020-10-24 02:31:33,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-24 02:31:33,848 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 314 transitions. [2020-10-24 02:31:33,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-24 02:31:33,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:33,850 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:33,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-24 02:31:33,850 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:33,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:33,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1179690735, now seen corresponding path program 17 times [2020-10-24 02:31:33,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:33,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385532002] [2020-10-24 02:31:33,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:37,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4340 backedges. 0 proven. 4340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:37,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385532002] [2020-10-24 02:31:37,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:37,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-24 02:31:37,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586903886] [2020-10-24 02:31:37,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-24 02:31:37,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:37,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-24 02:31:37,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=4392, Unknown=0, NotChecked=0, Total=4556 [2020-10-24 02:31:37,300 INFO L87 Difference]: Start difference. First operand 313 states and 314 transitions. Second operand 68 states. [2020-10-24 02:31:51,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:51,375 INFO L93 Difference]: Finished difference Result 341 states and 344 transitions. [2020-10-24 02:31:51,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-24 02:31:51,376 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 305 [2020-10-24 02:31:51,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:51,378 INFO L225 Difference]: With dead ends: 341 [2020-10-24 02:31:51,378 INFO L226 Difference]: Without dead ends: 328 [2020-10-24 02:31:51,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5061 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=591, Invalid=17499, Unknown=0, NotChecked=0, Total=18090 [2020-10-24 02:31:51,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-10-24 02:31:51,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 325. [2020-10-24 02:31:51,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-10-24 02:31:51,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 326 transitions. [2020-10-24 02:31:51,484 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 326 transitions. Word has length 305 [2020-10-24 02:31:51,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:51,484 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 326 transitions. [2020-10-24 02:31:51,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-24 02:31:51,484 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 326 transitions. [2020-10-24 02:31:51,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-24 02:31:51,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:51,486 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:51,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-24 02:31:51,488 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:51,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:51,489 INFO L82 PathProgramCache]: Analyzing trace with hash -446146964, now seen corresponding path program 18 times [2020-10-24 02:31:51,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:51,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [237637191] [2020-10-24 02:31:51,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:52,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 33 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:31:52,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [237637191] [2020-10-24 02:31:52,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:52,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-24 02:31:52,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613171324] [2020-10-24 02:31:52,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-24 02:31:52,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:52,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-24 02:31:52,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=772, Unknown=0, NotChecked=0, Total=1406 [2020-10-24 02:31:52,732 INFO L87 Difference]: Start difference. First operand 325 states and 326 transitions. Second operand 38 states. [2020-10-24 02:31:58,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:58,325 INFO L93 Difference]: Finished difference Result 351 states and 353 transitions. [2020-10-24 02:31:58,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-24 02:31:58,326 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 321 [2020-10-24 02:31:58,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:58,328 INFO L225 Difference]: With dead ends: 351 [2020-10-24 02:31:58,329 INFO L226 Difference]: Without dead ends: 341 [2020-10-24 02:31:58,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2939 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3817, Invalid=7525, Unknown=0, NotChecked=0, Total=11342 [2020-10-24 02:31:58,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2020-10-24 02:31:58,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 331. [2020-10-24 02:31:58,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-10-24 02:31:58,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 332 transitions. [2020-10-24 02:31:58,477 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 332 transitions. Word has length 321 [2020-10-24 02:31:58,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:58,478 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 332 transitions. [2020-10-24 02:31:58,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-24 02:31:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 332 transitions. [2020-10-24 02:31:58,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-24 02:31:58,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:58,480 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:31:58,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-24 02:31:58,480 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:58,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1599199825, now seen corresponding path program 18 times [2020-10-24 02:31:58,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:58,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311389565] [2020-10-24 02:31:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:02,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4917 backedges. 0 proven. 4917 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:32:02,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311389565] [2020-10-24 02:32:02,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:02,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-24 02:32:02,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967251252] [2020-10-24 02:32:02,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-24 02:32:02,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:02,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-24 02:32:02,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=4938, Unknown=0, NotChecked=0, Total=5112 [2020-10-24 02:32:02,489 INFO L87 Difference]: Start difference. First operand 331 states and 332 transitions. Second operand 72 states. [2020-10-24 02:32:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:18,591 INFO L93 Difference]: Finished difference Result 359 states and 362 transitions. [2020-10-24 02:32:18,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-24 02:32:18,592 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 323 [2020-10-24 02:32:18,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:18,594 INFO L225 Difference]: With dead ends: 359 [2020-10-24 02:32:18,594 INFO L226 Difference]: Without dead ends: 346 [2020-10-24 02:32:18,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5717 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=627, Invalid=19679, Unknown=0, NotChecked=0, Total=20306 [2020-10-24 02:32:18,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-10-24 02:32:18,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 343. [2020-10-24 02:32:18,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 343 states. [2020-10-24 02:32:18,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 344 transitions. [2020-10-24 02:32:18,758 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 344 transitions. Word has length 323 [2020-10-24 02:32:18,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:18,758 INFO L481 AbstractCegarLoop]: Abstraction has 343 states and 344 transitions. [2020-10-24 02:32:18,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-24 02:32:18,758 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 344 transitions. [2020-10-24 02:32:18,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2020-10-24 02:32:18,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:18,761 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:32:18,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-24 02:32:18,761 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:18,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:18,761 INFO L82 PathProgramCache]: Analyzing trace with hash 7361836, now seen corresponding path program 19 times [2020-10-24 02:32:18,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:18,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357947472] [2020-10-24 02:32:18,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:20,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:20,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5460 backedges. 35 proven. 5425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:32:20,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357947472] [2020-10-24 02:32:20,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:20,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-24 02:32:20,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103085566] [2020-10-24 02:32:20,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-24 02:32:20,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:20,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-24 02:32:20,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=707, Invalid=853, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 02:32:20,209 INFO L87 Difference]: Start difference. First operand 343 states and 344 transitions. Second operand 40 states. [2020-10-24 02:32:26,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:26,429 INFO L93 Difference]: Finished difference Result 369 states and 371 transitions. [2020-10-24 02:32:26,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-24 02:32:26,431 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 339 [2020-10-24 02:32:26,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:26,432 INFO L225 Difference]: With dead ends: 369 [2020-10-24 02:32:26,432 INFO L226 Difference]: Without dead ends: 359 [2020-10-24 02:32:26,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3292 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4257, Invalid=8399, Unknown=0, NotChecked=0, Total=12656 [2020-10-24 02:32:26,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-24 02:32:26,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 349. [2020-10-24 02:32:26,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 349 states. [2020-10-24 02:32:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 350 transitions. [2020-10-24 02:32:26,571 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 350 transitions. Word has length 339 [2020-10-24 02:32:26,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:26,571 INFO L481 AbstractCegarLoop]: Abstraction has 349 states and 350 transitions. [2020-10-24 02:32:26,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-24 02:32:26,572 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 350 transitions. [2020-10-24 02:32:26,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-24 02:32:26,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:26,574 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:32:26,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-24 02:32:26,574 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:26,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:26,575 INFO L82 PathProgramCache]: Analyzing trace with hash 431060079, now seen corresponding path program 19 times [2020-10-24 02:32:26,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:26,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833365810] [2020-10-24 02:32:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:26,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:30,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:30,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5530 backedges. 0 proven. 5530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:32:31,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833365810] [2020-10-24 02:32:31,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:31,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-24 02:32:31,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641463872] [2020-10-24 02:32:31,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-24 02:32:31,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:31,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-24 02:32:31,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=5516, Unknown=0, NotChecked=0, Total=5700 [2020-10-24 02:32:31,013 INFO L87 Difference]: Start difference. First operand 349 states and 350 transitions. Second operand 76 states. [2020-10-24 02:32:49,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:49,434 INFO L93 Difference]: Finished difference Result 377 states and 380 transitions. [2020-10-24 02:32:49,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-24 02:32:49,435 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 341 [2020-10-24 02:32:49,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:49,438 INFO L225 Difference]: With dead ends: 377 [2020-10-24 02:32:49,438 INFO L226 Difference]: Without dead ends: 364 [2020-10-24 02:32:49,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6413 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=663, Invalid=21987, Unknown=0, NotChecked=0, Total=22650 [2020-10-24 02:32:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2020-10-24 02:32:49,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 361. [2020-10-24 02:32:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-24 02:32:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 362 transitions. [2020-10-24 02:32:49,612 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 362 transitions. Word has length 341 [2020-10-24 02:32:49,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:49,612 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 362 transitions. [2020-10-24 02:32:49,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-24 02:32:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 362 transitions. [2020-10-24 02:32:49,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-10-24 02:32:49,615 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:49,615 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:32:49,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-24 02:32:49,615 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:49,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:49,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1417552876, now seen corresponding path program 20 times [2020-10-24 02:32:49,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:49,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694995543] [2020-10-24 02:32:49,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:51,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:51,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6105 backedges. 37 proven. 6068 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:32:51,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694995543] [2020-10-24 02:32:51,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:51,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-24 02:32:51,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372877752] [2020-10-24 02:32:51,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-24 02:32:51,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:51,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-24 02:32:51,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=938, Unknown=0, NotChecked=0, Total=1722 [2020-10-24 02:32:51,292 INFO L87 Difference]: Start difference. First operand 361 states and 362 transitions. Second operand 42 states. [2020-10-24 02:32:58,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:58,446 INFO L93 Difference]: Finished difference Result 387 states and 389 transitions. [2020-10-24 02:32:58,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-24 02:32:58,447 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 357 [2020-10-24 02:32:58,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:58,450 INFO L225 Difference]: With dead ends: 387 [2020-10-24 02:32:58,450 INFO L226 Difference]: Without dead ends: 377 [2020-10-24 02:32:58,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3665 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4721, Invalid=9321, Unknown=0, NotChecked=0, Total=14042 [2020-10-24 02:32:58,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-24 02:32:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 367. [2020-10-24 02:32:58,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-10-24 02:32:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 368 transitions. [2020-10-24 02:32:58,653 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 368 transitions. Word has length 357 [2020-10-24 02:32:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:58,654 INFO L481 AbstractCegarLoop]: Abstraction has 367 states and 368 transitions. [2020-10-24 02:32:58,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-24 02:32:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 368 transitions. [2020-10-24 02:32:58,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-10-24 02:32:58,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:58,656 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:32:58,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-24 02:32:58,656 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:58,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:58,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1585016017, now seen corresponding path program 20 times [2020-10-24 02:32:58,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:58,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674421118] [2020-10-24 02:32:58,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:03,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:33:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:03,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6179 backedges. 0 proven. 6179 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:33:03,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674421118] [2020-10-24 02:33:03,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:33:03,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-10-24 02:33:03,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235922813] [2020-10-24 02:33:03,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-24 02:33:03,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:33:03,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-24 02:33:03,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=6126, Unknown=0, NotChecked=0, Total=6320 [2020-10-24 02:33:03,907 INFO L87 Difference]: Start difference. First operand 367 states and 368 transitions. Second operand 80 states. [2020-10-24 02:33:25,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:33:25,424 INFO L93 Difference]: Finished difference Result 395 states and 398 transitions. [2020-10-24 02:33:25,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-24 02:33:25,426 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 359 [2020-10-24 02:33:25,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:33:25,428 INFO L225 Difference]: With dead ends: 395 [2020-10-24 02:33:25,429 INFO L226 Difference]: Without dead ends: 382 [2020-10-24 02:33:25,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7149 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=699, Invalid=24423, Unknown=0, NotChecked=0, Total=25122 [2020-10-24 02:33:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2020-10-24 02:33:25,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 379. [2020-10-24 02:33:25,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-24 02:33:25,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 380 transitions. [2020-10-24 02:33:25,579 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 380 transitions. Word has length 359 [2020-10-24 02:33:25,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:33:25,580 INFO L481 AbstractCegarLoop]: Abstraction has 379 states and 380 transitions. [2020-10-24 02:33:25,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-24 02:33:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 380 transitions. [2020-10-24 02:33:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2020-10-24 02:33:25,582 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:33:25,583 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:33:25,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-24 02:33:25,583 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:33:25,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:33:25,583 INFO L82 PathProgramCache]: Analyzing trace with hash -105004372, now seen corresponding path program 21 times [2020-10-24 02:33:25,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:33:25,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57948291] [2020-10-24 02:33:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:33:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:27,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:33:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:27,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6786 backedges. 39 proven. 6747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:33:27,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57948291] [2020-10-24 02:33:27,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:33:27,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-24 02:33:27,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136618423] [2020-10-24 02:33:27,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-24 02:33:27,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:33:27,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-24 02:33:27,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=865, Invalid=1027, Unknown=0, NotChecked=0, Total=1892 [2020-10-24 02:33:27,535 INFO L87 Difference]: Start difference. First operand 379 states and 380 transitions. Second operand 44 states. [2020-10-24 02:33:35,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:33:35,639 INFO L93 Difference]: Finished difference Result 405 states and 407 transitions. [2020-10-24 02:33:35,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-24 02:33:35,640 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 375 [2020-10-24 02:33:35,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:33:35,642 INFO L225 Difference]: With dead ends: 405 [2020-10-24 02:33:35,642 INFO L226 Difference]: Without dead ends: 395 [2020-10-24 02:33:35,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4058 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=5209, Invalid=10291, Unknown=0, NotChecked=0, Total=15500 [2020-10-24 02:33:35,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2020-10-24 02:33:35,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 385. [2020-10-24 02:33:35,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-24 02:33:35,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 386 transitions. [2020-10-24 02:33:35,802 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 386 transitions. Word has length 375 [2020-10-24 02:33:35,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:33:35,802 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 386 transitions. [2020-10-24 02:33:35,802 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-24 02:33:35,802 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 386 transitions. [2020-10-24 02:33:35,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-24 02:33:35,805 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:33:35,805 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:33:35,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-24 02:33:35,805 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:33:35,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:33:35,806 INFO L82 PathProgramCache]: Analyzing trace with hash -178683409, now seen corresponding path program 21 times [2020-10-24 02:33:35,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:33:35,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021523707] [2020-10-24 02:33:35,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:33:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:41,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:33:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:41,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6864 backedges. 0 proven. 6864 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:33:41,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021523707] [2020-10-24 02:33:41,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:33:41,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-24 02:33:41,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539546857] [2020-10-24 02:33:41,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-24 02:33:41,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:33:41,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-24 02:33:41,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=6768, Unknown=0, NotChecked=0, Total=6972 [2020-10-24 02:33:41,982 INFO L87 Difference]: Start difference. First operand 385 states and 386 transitions. Second operand 84 states. [2020-10-24 02:34:07,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:34:07,342 INFO L93 Difference]: Finished difference Result 413 states and 416 transitions. [2020-10-24 02:34:07,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-10-24 02:34:07,343 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 377 [2020-10-24 02:34:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:34:07,346 INFO L225 Difference]: With dead ends: 413 [2020-10-24 02:34:07,346 INFO L226 Difference]: Without dead ends: 400 [2020-10-24 02:34:07,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7925 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=735, Invalid=26987, Unknown=0, NotChecked=0, Total=27722 [2020-10-24 02:34:07,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2020-10-24 02:34:07,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 397. [2020-10-24 02:34:07,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-10-24 02:34:07,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 398 transitions. [2020-10-24 02:34:07,520 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 398 transitions. Word has length 377 [2020-10-24 02:34:07,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:34:07,521 INFO L481 AbstractCegarLoop]: Abstraction has 397 states and 398 transitions. [2020-10-24 02:34:07,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-24 02:34:07,521 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 398 transitions. [2020-10-24 02:34:07,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2020-10-24 02:34:07,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:34:07,524 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:34:07,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-24 02:34:07,524 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:34:07,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:34:07,524 INFO L82 PathProgramCache]: Analyzing trace with hash -715443860, now seen corresponding path program 22 times [2020-10-24 02:34:07,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:34:07,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635260637] [2020-10-24 02:34:07,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:34:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:09,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:34:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:09,847 INFO L134 CoverageAnalysis]: Checked inductivity of 7503 backedges. 41 proven. 7462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:34:09,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635260637] [2020-10-24 02:34:09,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:34:09,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-24 02:34:09,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035510432] [2020-10-24 02:34:09,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-24 02:34:09,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:34:09,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-24 02:34:09,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=1120, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 02:34:09,849 INFO L87 Difference]: Start difference. First operand 397 states and 398 transitions. Second operand 46 states. [2020-10-24 02:34:19,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:34:19,337 INFO L93 Difference]: Finished difference Result 423 states and 425 transitions. [2020-10-24 02:34:19,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-24 02:34:19,338 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 393 [2020-10-24 02:34:19,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:34:19,340 INFO L225 Difference]: With dead ends: 423 [2020-10-24 02:34:19,340 INFO L226 Difference]: Without dead ends: 413 [2020-10-24 02:34:19,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4471 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=5721, Invalid=11309, Unknown=0, NotChecked=0, Total=17030 [2020-10-24 02:34:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-24 02:34:19,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 403. [2020-10-24 02:34:19,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-10-24 02:34:19,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 404 transitions. [2020-10-24 02:34:19,503 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 404 transitions. Word has length 393 [2020-10-24 02:34:19,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:34:19,504 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 404 transitions. [2020-10-24 02:34:19,504 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-24 02:34:19,504 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 404 transitions. [2020-10-24 02:34:19,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-10-24 02:34:19,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:34:19,506 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:34:19,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-24 02:34:19,506 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:34:19,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:34:19,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1599488175, now seen corresponding path program 22 times [2020-10-24 02:34:19,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:34:19,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719418679] [2020-10-24 02:34:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:34:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:26,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:34:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:26,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7585 backedges. 0 proven. 7585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:34:26,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719418679] [2020-10-24 02:34:26,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:34:26,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-24 02:34:26,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76846788] [2020-10-24 02:34:26,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-24 02:34:26,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:34:26,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-24 02:34:26,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=7442, Unknown=0, NotChecked=0, Total=7656 [2020-10-24 02:34:26,991 INFO L87 Difference]: Start difference. First operand 403 states and 404 transitions. Second operand 88 states. [2020-10-24 02:34:55,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:34:55,698 INFO L93 Difference]: Finished difference Result 431 states and 434 transitions. [2020-10-24 02:34:55,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-24 02:34:55,699 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 395 [2020-10-24 02:34:55,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:34:55,702 INFO L225 Difference]: With dead ends: 431 [2020-10-24 02:34:55,702 INFO L226 Difference]: Without dead ends: 418 [2020-10-24 02:34:55,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8741 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=771, Invalid=29679, Unknown=0, NotChecked=0, Total=30450 [2020-10-24 02:34:55,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-10-24 02:34:55,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 415. [2020-10-24 02:34:55,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-10-24 02:34:55,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 416 transitions. [2020-10-24 02:34:55,925 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 416 transitions. Word has length 395 [2020-10-24 02:34:55,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:34:55,925 INFO L481 AbstractCegarLoop]: Abstraction has 415 states and 416 transitions. [2020-10-24 02:34:55,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-24 02:34:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 416 transitions. [2020-10-24 02:34:55,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2020-10-24 02:34:55,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:34:55,928 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:34:55,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-24 02:34:55,929 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:34:55,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:34:55,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1501720620, now seen corresponding path program 23 times [2020-10-24 02:34:55,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:34:55,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746419504] [2020-10-24 02:34:55,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:34:55,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:58,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:34:58,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:58,801 INFO L134 CoverageAnalysis]: Checked inductivity of 8256 backedges. 43 proven. 8213 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:34:58,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746419504] [2020-10-24 02:34:58,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:34:58,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-24 02:34:58,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246096807] [2020-10-24 02:34:58,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-24 02:34:58,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:34:58,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-24 02:34:58,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1039, Invalid=1217, Unknown=0, NotChecked=0, Total=2256 [2020-10-24 02:34:58,802 INFO L87 Difference]: Start difference. First operand 415 states and 416 transitions. Second operand 48 states. [2020-10-24 02:35:09,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:35:09,677 INFO L93 Difference]: Finished difference Result 441 states and 443 transitions. [2020-10-24 02:35:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-10-24 02:35:09,679 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 411 [2020-10-24 02:35:09,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:35:09,681 INFO L225 Difference]: With dead ends: 441 [2020-10-24 02:35:09,681 INFO L226 Difference]: Without dead ends: 431 [2020-10-24 02:35:09,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4904 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=6257, Invalid=12375, Unknown=0, NotChecked=0, Total=18632 [2020-10-24 02:35:09,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2020-10-24 02:35:09,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 421. [2020-10-24 02:35:09,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 421 states. [2020-10-24 02:35:09,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 422 transitions. [2020-10-24 02:35:09,875 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 422 transitions. Word has length 411 [2020-10-24 02:35:09,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:35:09,875 INFO L481 AbstractCegarLoop]: Abstraction has 421 states and 422 transitions. [2020-10-24 02:35:09,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-24 02:35:09,875 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 422 transitions. [2020-10-24 02:35:09,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-10-24 02:35:09,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:35:09,877 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:35:09,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-24 02:35:09,877 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:35:09,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:35:09,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1990774639, now seen corresponding path program 23 times [2020-10-24 02:35:09,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:35:09,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862059793] [2020-10-24 02:35:09,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:35:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:18,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:35:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 8342 backedges. 0 proven. 8342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:35:18,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862059793] [2020-10-24 02:35:18,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:35:18,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92] total 92 [2020-10-24 02:35:18,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195785987] [2020-10-24 02:35:18,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-10-24 02:35:18,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:35:18,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-10-24 02:35:18,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=8148, Unknown=0, NotChecked=0, Total=8372 [2020-10-24 02:35:18,891 INFO L87 Difference]: Start difference. First operand 421 states and 422 transitions. Second operand 92 states. [2020-10-24 02:35:54,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:35:54,103 INFO L93 Difference]: Finished difference Result 449 states and 452 transitions. [2020-10-24 02:35:54,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-10-24 02:35:54,105 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 413 [2020-10-24 02:35:54,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:35:54,108 INFO L225 Difference]: With dead ends: 449 [2020-10-24 02:35:54,109 INFO L226 Difference]: Without dead ends: 436 [2020-10-24 02:35:54,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9597 ImplicationChecksByTransitivity, 19.3s TimeCoverageRelationStatistics Valid=807, Invalid=32499, Unknown=0, NotChecked=0, Total=33306 [2020-10-24 02:35:54,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-24 02:35:54,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 433. [2020-10-24 02:35:54,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-10-24 02:35:54,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 434 transitions. [2020-10-24 02:35:54,330 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 434 transitions. Word has length 413 [2020-10-24 02:35:54,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:35:54,331 INFO L481 AbstractCegarLoop]: Abstraction has 433 states and 434 transitions. [2020-10-24 02:35:54,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-10-24 02:35:54,331 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 434 transitions. [2020-10-24 02:35:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 430 [2020-10-24 02:35:54,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:35:54,334 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:35:54,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-24 02:35:54,334 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:35:54,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:35:54,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1163886316, now seen corresponding path program 24 times [2020-10-24 02:35:54,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:35:54,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876621393] [2020-10-24 02:35:54,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:35:54,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:57,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:35:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:57,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9045 backedges. 45 proven. 9000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:35:57,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876621393] [2020-10-24 02:35:57,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:35:57,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-24 02:35:57,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669144189] [2020-10-24 02:35:57,773 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-24 02:35:57,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:35:57,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-24 02:35:57,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1132, Invalid=1318, Unknown=0, NotChecked=0, Total=2450 [2020-10-24 02:35:57,774 INFO L87 Difference]: Start difference. First operand 433 states and 434 transitions. Second operand 50 states. [2020-10-24 02:36:10,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:36:10,674 INFO L93 Difference]: Finished difference Result 459 states and 461 transitions. [2020-10-24 02:36:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-10-24 02:36:10,676 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 429 [2020-10-24 02:36:10,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:36:10,679 INFO L225 Difference]: With dead ends: 459 [2020-10-24 02:36:10,679 INFO L226 Difference]: Without dead ends: 449 [2020-10-24 02:36:10,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5357 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=6817, Invalid=13489, Unknown=0, NotChecked=0, Total=20306 [2020-10-24 02:36:10,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-10-24 02:36:10,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 439. [2020-10-24 02:36:10,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-10-24 02:36:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 440 transitions. [2020-10-24 02:36:10,881 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 440 transitions. Word has length 429 [2020-10-24 02:36:10,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:36:10,882 INFO L481 AbstractCegarLoop]: Abstraction has 439 states and 440 transitions. [2020-10-24 02:36:10,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-24 02:36:10,882 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 440 transitions. [2020-10-24 02:36:10,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2020-10-24 02:36:10,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:36:10,885 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:36:10,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-24 02:36:10,885 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:36:10,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:36:10,886 INFO L82 PathProgramCache]: Analyzing trace with hash -545444305, now seen corresponding path program 24 times [2020-10-24 02:36:10,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:36:10,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286159477] [2020-10-24 02:36:10,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:36:10,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:36:20,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:36:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:36:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 9135 backedges. 0 proven. 9135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:36:21,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286159477] [2020-10-24 02:36:21,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:36:21,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96] total 96 [2020-10-24 02:36:21,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234228110] [2020-10-24 02:36:21,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 96 states [2020-10-24 02:36:21,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:36:21,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2020-10-24 02:36:21,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=8886, Unknown=0, NotChecked=0, Total=9120 [2020-10-24 02:36:21,209 INFO L87 Difference]: Start difference. First operand 439 states and 440 transitions. Second operand 96 states. [2020-10-24 02:37:05,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:37:05,895 INFO L93 Difference]: Finished difference Result 467 states and 470 transitions. [2020-10-24 02:37:05,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-10-24 02:37:05,898 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 431 [2020-10-24 02:37:05,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:37:05,902 INFO L225 Difference]: With dead ends: 467 [2020-10-24 02:37:05,902 INFO L226 Difference]: Without dead ends: 454 [2020-10-24 02:37:05,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10493 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=843, Invalid=35447, Unknown=0, NotChecked=0, Total=36290 [2020-10-24 02:37:05,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2020-10-24 02:37:06,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 451. [2020-10-24 02:37:06,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-10-24 02:37:06,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 452 transitions. [2020-10-24 02:37:06,115 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 452 transitions. Word has length 431 [2020-10-24 02:37:06,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:37:06,115 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 452 transitions. [2020-10-24 02:37:06,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 96 states. [2020-10-24 02:37:06,115 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 452 transitions. [2020-10-24 02:37:06,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-10-24 02:37:06,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:37:06,118 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:37:06,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-24 02:37:06,118 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:37:06,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:37:06,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1696488876, now seen corresponding path program 25 times [2020-10-24 02:37:06,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:37:06,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146953523] [2020-10-24 02:37:06,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:37:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:37:17,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:37:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:37:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9870 backedges. 1 proven. 9869 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:37:17,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146953523] [2020-10-24 02:37:17,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:37:17,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102] total 102 [2020-10-24 02:37:17,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830878600] [2020-10-24 02:37:17,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 102 states [2020-10-24 02:37:17,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:37:17,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2020-10-24 02:37:17,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=9957, Unknown=0, NotChecked=0, Total=10302 [2020-10-24 02:37:17,748 INFO L87 Difference]: Start difference. First operand 451 states and 452 transitions. Second operand 102 states. [2020-10-24 02:37:18,443 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-24 02:37:19,058 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 34 [2020-10-24 02:37:19,490 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 39 [2020-10-24 02:37:20,244 WARN L193 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 157 [2020-10-24 02:37:21,195 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 160 [2020-10-24 02:37:22,243 WARN L193 SmtUtils]: Spent 686.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 165 [2020-10-24 02:37:23,544 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 156 [2020-10-24 02:37:24,418 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 244 DAG size of output: 159 [2020-10-24 02:37:25,357 WARN L193 SmtUtils]: Spent 658.00 ms on a formula simplification. DAG size of input: 249 DAG size of output: 164 [2020-10-24 02:37:26,130 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 154 [2020-10-24 02:37:27,034 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 240 DAG size of output: 160 [2020-10-24 02:37:28,029 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 165 [2020-10-24 02:37:28,819 WARN L193 SmtUtils]: Spent 560.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 155 [2020-10-24 02:37:29,720 WARN L193 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 155 [2020-10-24 02:37:30,669 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 160 [2020-10-24 02:37:31,458 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 149 [2020-10-24 02:37:32,398 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 232 DAG size of output: 156 [2020-10-24 02:37:33,378 WARN L193 SmtUtils]: Spent 642.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 161 [2020-10-24 02:37:34,199 WARN L193 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 150 [2020-10-24 02:37:35,111 WARN L193 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 228 DAG size of output: 151 [2020-10-24 02:37:36,020 WARN L193 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 156 [2020-10-24 02:37:36,777 WARN L193 SmtUtils]: Spent 512.00 ms on a formula simplification. DAG size of input: 223 DAG size of output: 137 [2020-10-24 02:37:37,653 WARN L193 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 141 [2020-10-24 02:37:38,518 WARN L193 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 151 [2020-10-24 02:37:39,226 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 136 [2020-10-24 02:37:40,145 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 141 [2020-10-24 02:37:41,053 WARN L193 SmtUtils]: Spent 556.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 146 [2020-10-24 02:37:41,802 WARN L193 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 132 [2020-10-24 02:37:42,716 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 216 DAG size of output: 137 [2020-10-24 02:37:43,622 WARN L193 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 142 [2020-10-24 02:37:44,402 WARN L193 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 132 [2020-10-24 02:37:45,317 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 137 [2020-10-24 02:37:46,223 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 142 [2020-10-24 02:37:46,980 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 127 [2020-10-24 02:37:47,982 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 132 [2020-10-24 02:37:48,927 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 137 [2020-10-24 02:37:49,703 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 127 [2020-10-24 02:37:50,645 WARN L193 SmtUtils]: Spent 434.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 127 [2020-10-24 02:37:51,619 WARN L193 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 132 [2020-10-24 02:37:52,389 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 122 [2020-10-24 02:37:53,392 WARN L193 SmtUtils]: Spent 439.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 127 [2020-10-24 02:37:54,370 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 132 [2020-10-24 02:37:55,164 WARN L193 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 122 [2020-10-24 02:37:56,144 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 122 [2020-10-24 02:37:57,103 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 127 [2020-10-24 02:37:57,884 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 117 [2020-10-24 02:37:58,846 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 117 [2020-10-24 02:37:59,807 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 122 [2020-10-24 02:38:00,672 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 117 [2020-10-24 02:38:01,671 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 117 [2020-10-24 02:38:02,587 WARN L193 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 122 [2020-10-24 02:38:03,388 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 112 [2020-10-24 02:38:04,352 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 112 [2020-10-24 02:38:05,329 WARN L193 SmtUtils]: Spent 462.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 117 [2020-10-24 02:38:06,135 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 112 [2020-10-24 02:38:07,130 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 112 [2020-10-24 02:38:08,100 WARN L193 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 117 [2020-10-24 02:38:08,910 WARN L193 SmtUtils]: Spent 354.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 107 [2020-10-24 02:38:09,919 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 107 [2020-10-24 02:38:10,866 WARN L193 SmtUtils]: Spent 428.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 112 [2020-10-24 02:38:11,662 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 107 [2020-10-24 02:38:12,654 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 102 [2020-10-24 02:38:13,601 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 107 [2020-10-24 02:38:14,393 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 102 [2020-10-24 02:38:15,413 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 102 [2020-10-24 02:38:16,372 WARN L193 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 107 [2020-10-24 02:38:17,213 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 102 [2020-10-24 02:38:18,245 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 97 [2020-10-24 02:38:19,204 WARN L193 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 102 [2020-10-24 02:38:20,053 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 97 [2020-10-24 02:38:21,103 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 97 [2020-10-24 02:38:22,032 WARN L193 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 102 [2020-10-24 02:38:22,812 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 97 [2020-10-24 02:38:23,800 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 92 [2020-10-24 02:38:24,725 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 97 [2020-10-24 02:38:25,509 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 92 [2020-10-24 02:38:26,504 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 87 [2020-10-24 02:38:27,427 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 92 [2020-10-24 02:38:28,220 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 92 [2020-10-24 02:38:29,225 WARN L193 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 87 [2020-10-24 02:38:30,163 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 92 [2020-10-24 02:38:30,936 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 87 [2020-10-24 02:38:31,934 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 82 [2020-10-24 02:38:32,871 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 87 [2020-10-24 02:38:33,641 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 82 [2020-10-24 02:38:34,732 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 82 [2020-10-24 02:38:35,730 WARN L193 SmtUtils]: Spent 359.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 87 [2020-10-24 02:38:36,487 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2020-10-24 02:38:37,498 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 77 [2020-10-24 02:38:38,430 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 82 [2020-10-24 02:38:39,190 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-10-24 02:38:40,189 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-10-24 02:38:41,149 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 82 [2020-10-24 02:38:41,982 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2020-10-24 02:38:43,042 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2020-10-24 02:38:43,950 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 77 [2020-10-24 02:38:44,705 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2020-10-24 02:38:45,674 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 72 [2020-10-24 02:38:46,585 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 77 [2020-10-24 02:38:47,349 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 72 [2020-10-24 02:38:48,297 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 72 [2020-10-24 02:38:49,181 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 77 [2020-10-24 02:38:49,892 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2020-10-24 02:38:50,816 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 67 [2020-10-24 02:38:51,728 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 72 [2020-10-24 02:38:52,453 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-24 02:38:53,353 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-24 02:38:54,223 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 72 [2020-10-24 02:38:54,908 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-10-24 02:38:55,790 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-10-24 02:38:56,663 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-24 02:38:57,346 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-10-24 02:38:58,204 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 57 [2020-10-24 02:38:59,028 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 62 [2020-10-24 02:38:59,695 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-24 02:39:00,529 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-24 02:39:01,411 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-10-24 02:39:02,068 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-24 02:39:02,873 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-24 02:39:03,671 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 57 [2020-10-24 02:39:04,307 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-24 02:39:05,081 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-24 02:39:05,854 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-24 02:39:06,463 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-24 02:39:07,156 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 47 [2020-10-24 02:39:07,871 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 52 [2020-10-24 02:39:08,475 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2020-10-24 02:39:09,199 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-24 02:39:09,944 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-24 02:39:10,469 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-24 02:39:11,084 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-24 02:39:11,757 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-24 02:39:12,270 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-24 02:39:12,850 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-24 02:39:13,510 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2020-10-24 02:39:17,061 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 35 [2020-10-24 02:39:19,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:39:19,777 INFO L93 Difference]: Finished difference Result 476 states and 478 transitions. [2020-10-24 02:39:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2020-10-24 02:39:19,783 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 447 [2020-10-24 02:39:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:39:19,786 INFO L225 Difference]: With dead ends: 476 [2020-10-24 02:39:19,786 INFO L226 Difference]: Without dead ends: 466 [2020-10-24 02:39:19,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14912 ImplicationChecksByTransitivity, 125.3s TimeCoverageRelationStatistics Valid=11505, Invalid=50247, Unknown=0, NotChecked=0, Total=61752 [2020-10-24 02:39:19,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-10-24 02:39:20,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 457. [2020-10-24 02:39:20,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 457 states. [2020-10-24 02:39:20,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 458 transitions. [2020-10-24 02:39:20,042 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 458 transitions. Word has length 447 [2020-10-24 02:39:20,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:39:20,043 INFO L481 AbstractCegarLoop]: Abstraction has 457 states and 458 transitions. [2020-10-24 02:39:20,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 102 states. [2020-10-24 02:39:20,043 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 458 transitions. [2020-10-24 02:39:20,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-10-24 02:39:20,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:39:20,046 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:39:20,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-24 02:39:20,046 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:39:20,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:39:20,047 INFO L82 PathProgramCache]: Analyzing trace with hash 184507631, now seen corresponding path program 25 times [2020-10-24 02:39:20,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:39:20,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643114884] [2020-10-24 02:39:20,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:39:20,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:35,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:39:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:39:36,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9964 backedges. 0 proven. 9964 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:39:36,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643114884] [2020-10-24 02:39:36,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:39:36,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100] total 100 [2020-10-24 02:39:36,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717244264] [2020-10-24 02:39:36,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 100 states [2020-10-24 02:39:36,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:39:36,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2020-10-24 02:39:36,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=9656, Unknown=0, NotChecked=0, Total=9900 [2020-10-24 02:39:36,214 INFO L87 Difference]: Start difference. First operand 457 states and 458 transitions. Second operand 100 states. [2020-10-24 02:40:48,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:40:48,682 INFO L93 Difference]: Finished difference Result 485 states and 488 transitions. [2020-10-24 02:40:48,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-10-24 02:40:48,686 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 449 [2020-10-24 02:40:48,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:40:48,688 INFO L225 Difference]: With dead ends: 485 [2020-10-24 02:40:48,689 INFO L226 Difference]: Without dead ends: 472 [2020-10-24 02:40:48,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11429 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=879, Invalid=38523, Unknown=0, NotChecked=0, Total=39402 [2020-10-24 02:40:48,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-10-24 02:40:48,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 469. [2020-10-24 02:40:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 469 states. [2020-10-24 02:40:49,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 469 states to 469 states and 470 transitions. [2020-10-24 02:40:49,000 INFO L78 Accepts]: Start accepts. Automaton has 469 states and 470 transitions. Word has length 449 [2020-10-24 02:40:49,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:40:49,000 INFO L481 AbstractCegarLoop]: Abstraction has 469 states and 470 transitions. [2020-10-24 02:40:49,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 100 states. [2020-10-24 02:40:49,000 INFO L276 IsEmpty]: Start isEmpty. Operand 469 states and 470 transitions. [2020-10-24 02:40:49,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2020-10-24 02:40:49,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:40:49,002 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:40:49,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-24 02:40:49,003 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:40:49,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:40:49,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1374358636, now seen corresponding path program 26 times [2020-10-24 02:40:49,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:40:49,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359100065] [2020-10-24 02:40:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:40:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:07,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:41:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:41:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 10731 backedges. 1 proven. 10730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:41:07,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359100065] [2020-10-24 02:41:07,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:41:07,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106] total 106 [2020-10-24 02:41:07,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857478097] [2020-10-24 02:41:07,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 106 states [2020-10-24 02:41:07,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:41:07,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2020-10-24 02:41:07,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=10771, Unknown=0, NotChecked=0, Total=11130 [2020-10-24 02:41:07,623 INFO L87 Difference]: Start difference. First operand 469 states and 470 transitions. Second operand 106 states. [2020-10-24 02:41:08,555 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 32 [2020-10-24 02:41:09,320 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 34 [2020-10-24 02:41:09,957 WARN L193 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 39 [2020-10-24 02:41:10,937 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 162 [2020-10-24 02:41:12,132 WARN L193 SmtUtils]: Spent 764.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 165 [2020-10-24 02:41:13,643 WARN L193 SmtUtils]: Spent 990.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 170 [2020-10-24 02:41:15,537 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 252 DAG size of output: 161 [2020-10-24 02:41:16,664 WARN L193 SmtUtils]: Spent 742.00 ms on a formula simplification. DAG size of input: 254 DAG size of output: 164 [2020-10-24 02:41:18,078 WARN L193 SmtUtils]: Spent 1.01 s on a formula simplification. DAG size of input: 259 DAG size of output: 169 [2020-10-24 02:41:19,115 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 159 [2020-10-24 02:41:20,358 WARN L193 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 165 [2020-10-24 02:41:21,766 WARN L193 SmtUtils]: Spent 978.00 ms on a formula simplification. DAG size of input: 255 DAG size of output: 170 [2020-10-24 02:41:22,832 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification. DAG size of input: 245 DAG size of output: 160 [2020-10-24 02:41:24,060 WARN L193 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 246 DAG size of output: 160 [2020-10-24 02:41:25,466 WARN L193 SmtUtils]: Spent 959.00 ms on a formula simplification. DAG size of input: 251 DAG size of output: 165 [2020-10-24 02:41:26,547 WARN L193 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 241 DAG size of output: 154 [2020-10-24 02:41:27,826 WARN L193 SmtUtils]: Spent 713.00 ms on a formula simplification. DAG size of input: 242 DAG size of output: 161 [2020-10-24 02:41:29,240 WARN L193 SmtUtils]: Spent 922.00 ms on a formula simplification. DAG size of input: 247 DAG size of output: 166 [2020-10-24 02:41:30,368 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification. DAG size of input: 237 DAG size of output: 155 [2020-10-24 02:41:31,713 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification. DAG size of input: 238 DAG size of output: 156 [2020-10-24 02:41:33,202 WARN L193 SmtUtils]: Spent 944.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 161 [2020-10-24 02:41:34,355 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 150 [2020-10-24 02:41:35,740 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 151 [2020-10-24 02:41:37,220 WARN L193 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 239 DAG size of output: 156 [2020-10-24 02:41:38,423 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 145 [2020-10-24 02:41:39,860 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 230 DAG size of output: 151 [2020-10-24 02:41:41,366 WARN L193 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 156 [2020-10-24 02:41:42,516 WARN L193 SmtUtils]: Spent 627.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 137 [2020-10-24 02:41:43,953 WARN L193 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 226 DAG size of output: 142 [2020-10-24 02:41:45,477 WARN L193 SmtUtils]: Spent 903.00 ms on a formula simplification. DAG size of input: 231 DAG size of output: 152 [2020-10-24 02:41:46,592 WARN L193 SmtUtils]: Spent 588.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 137 [2020-10-24 02:41:47,938 WARN L193 SmtUtils]: Spent 611.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 142 [2020-10-24 02:41:49,367 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification. DAG size of input: 227 DAG size of output: 147 [2020-10-24 02:41:50,500 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 132 [2020-10-24 02:41:51,913 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 137 [2020-10-24 02:41:53,317 WARN L193 SmtUtils]: Spent 786.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 142 [2020-10-24 02:41:54,452 WARN L193 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 132 [2020-10-24 02:41:55,888 WARN L193 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 132 [2020-10-24 02:41:57,308 WARN L193 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 137 [2020-10-24 02:41:58,438 WARN L193 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 127 [2020-10-24 02:41:59,869 WARN L193 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 132 [2020-10-24 02:42:01,283 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 137 [2020-10-24 02:42:02,447 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 127 [2020-10-24 02:42:03,911 WARN L193 SmtUtils]: Spent 530.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 127 [2020-10-24 02:42:05,320 WARN L193 SmtUtils]: Spent 710.00 ms on a formula simplification. DAG size of input: 207 DAG size of output: 132 [2020-10-24 02:42:06,504 WARN L193 SmtUtils]: Spent 541.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 122 [2020-10-24 02:42:07,956 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 122 [2020-10-24 02:42:09,342 WARN L193 SmtUtils]: Spent 695.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 127 [2020-10-24 02:42:10,481 WARN L193 SmtUtils]: Spent 500.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 122 [2020-10-24 02:42:11,944 WARN L193 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 122 [2020-10-24 02:42:13,324 WARN L193 SmtUtils]: Spent 660.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 127 [2020-10-24 02:42:14,464 WARN L193 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 117 [2020-10-24 02:42:15,957 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 117 [2020-10-24 02:42:17,399 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 122 [2020-10-24 02:42:18,623 WARN L193 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 117 [2020-10-24 02:42:20,182 WARN L193 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 117 [2020-10-24 02:42:21,594 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 122 [2020-10-24 02:42:22,742 WARN L193 SmtUtils]: Spent 452.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 112 [2020-10-24 02:42:24,247 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 112 [2020-10-24 02:42:25,717 WARN L193 SmtUtils]: Spent 675.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 117