/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/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:24:30,211 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:24:30,215 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:24:30,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:24:30,296 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:24:30,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:24:30,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:24:30,303 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:24:30,304 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:24:30,307 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:24:30,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:24:30,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:24:30,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:24:30,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:24:30,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:24:30,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:24:30,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:24:30,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:24:30,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:24:30,361 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:24:30,362 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 02:24:30,384 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:24:30,384 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:24:30,389 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:24:30,389 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:24:30,389 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:24:30,389 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:24:30,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:24:30,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:24:30,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:24:30,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:24:30,391 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:24:30,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:24:30,392 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:24:30,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:24:30,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:24:30,393 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:24:30,393 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:24:30,393 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:24:30,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:24:30,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:24:30,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:24:30,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:24:30,394 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:24:30,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:24:30,816 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:24:30,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:24:30,821 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:24:30,822 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:24:30,823 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2020-10-24 02:24:30,908 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e05b7a430/9a763fab91c247498fbd0f1527fcc573/FLAGee89cd9b6 [2020-10-24 02:24:31,571 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:24:31,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2020-10-24 02:24:31,579 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e05b7a430/9a763fab91c247498fbd0f1527fcc573/FLAGee89cd9b6 [2020-10-24 02:24:31,871 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e05b7a430/9a763fab91c247498fbd0f1527fcc573 [2020-10-24 02:24:31,874 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:24:31,881 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:24:31,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:24:31,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:24:31,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:24:31,892 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:24:31" (1/1) ... [2020-10-24 02:24:31,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@222dbcf7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:31, skipping insertion in model container [2020-10-24 02:24:31,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:24:31" (1/1) ... [2020-10-24 02:24:31,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:24:31,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:24:32,099 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:24:32,109 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:24:32,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:24:32,162 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:24:32,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32 WrapperNode [2020-10-24 02:24:32,163 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:24:32,164 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:24:32,164 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:24:32,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:24:32,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (1/1) ... [2020-10-24 02:24:32,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (1/1) ... [2020-10-24 02:24:32,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (1/1) ... [2020-10-24 02:24:32,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (1/1) ... [2020-10-24 02:24:32,217 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (1/1) ... [2020-10-24 02:24:32,227 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (1/1) ... [2020-10-24 02:24:32,231 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (1/1) ... [2020-10-24 02:24:32,235 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:24:32,237 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:24:32,237 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:24:32,237 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:24:32,239 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (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 02:24:32,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:24:32,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:24:32,307 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:24:32,308 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:24:32,308 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:24:32,308 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:24:32,308 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:24:32,308 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:24:32,308 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 02:24:32,309 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 02:24:32,309 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:24:32,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:24:32,309 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:24:32,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:24:32,309 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-24 02:24:32,310 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:24:32,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:24:32,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:24:32,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:24:32,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:24:32,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:24:32,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:24:32,747 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:24:32,747 INFO L298 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-24 02:24:32,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:24:32 BoogieIcfgContainer [2020-10-24 02:24:32,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:24:32,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:24:32,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:24:32,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:24:32,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:24:31" (1/3) ... [2020-10-24 02:24:32,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526c1308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:24:32, skipping insertion in model container [2020-10-24 02:24:32,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (2/3) ... [2020-10-24 02:24:32,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@526c1308 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:24:32, skipping insertion in model container [2020-10-24 02:24:32,757 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:24:32" (3/3) ... [2020-10-24 02:24:32,759 INFO L111 eAbstractionObserver]: Analyzing ICFG string-1.i [2020-10-24 02:24:32,788 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:24:32,801 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:24:32,828 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:24:32,868 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:24:32,868 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:24:32,869 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:24:32,869 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:24:32,869 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:24:32,869 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:24:32,869 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:24:32,870 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:24:32,908 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states. [2020-10-24 02:24:32,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-24 02:24:32,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:32,927 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:32,927 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:32,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1931188946, now seen corresponding path program 1 times [2020-10-24 02:24:32,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:32,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180686376] [2020-10-24 02:24:32,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:33,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:33,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:33,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:33,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180686376] [2020-10-24 02:24:33,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:24:33,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:24:33,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042851527] [2020-10-24 02:24:33,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:24:33,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:33,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:24:33,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:24:33,407 INFO L87 Difference]: Start difference. First operand 115 states. Second operand 3 states. [2020-10-24 02:24:33,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:33,686 INFO L93 Difference]: Finished difference Result 200 states and 230 transitions. [2020-10-24 02:24:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:24:33,688 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-10-24 02:24:33,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:33,698 INFO L225 Difference]: With dead ends: 200 [2020-10-24 02:24:33,698 INFO L226 Difference]: Without dead ends: 83 [2020-10-24 02:24:33,703 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 02:24:33,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-24 02:24:33,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-24 02:24:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-24 02:24:33,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 88 transitions. [2020-10-24 02:24:33,758 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 88 transitions. Word has length 43 [2020-10-24 02:24:33,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:33,759 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 88 transitions. [2020-10-24 02:24:33,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:24:33,759 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 88 transitions. [2020-10-24 02:24:33,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-24 02:24:33,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:33,762 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, 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 02:24:33,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:24:33,763 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:33,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:33,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1726206385, now seen corresponding path program 1 times [2020-10-24 02:24:33,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:33,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109575537] [2020-10-24 02:24:33,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:33,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:33,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:33,865 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 02:24:33,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109575537] [2020-10-24 02:24:33,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:24:33,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:24:33,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523593388] [2020-10-24 02:24:33,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:24:33,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:33,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:24:33,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:24:33,870 INFO L87 Difference]: Start difference. First operand 83 states and 88 transitions. Second operand 4 states. [2020-10-24 02:24:34,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:34,090 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2020-10-24 02:24:34,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 02:24:34,090 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-24 02:24:34,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:34,093 INFO L225 Difference]: With dead ends: 152 [2020-10-24 02:24:34,093 INFO L226 Difference]: Without dead ends: 95 [2020-10-24 02:24:34,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:24:34,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-24 02:24:34,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 85. [2020-10-24 02:24:34,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-24 02:24:34,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 90 transitions. [2020-10-24 02:24:34,110 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 90 transitions. Word has length 47 [2020-10-24 02:24:34,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:34,111 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 90 transitions. [2020-10-24 02:24:34,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:24:34,111 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 90 transitions. [2020-10-24 02:24:34,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-24 02:24:34,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:34,113 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, 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, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:34,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:24:34,114 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:34,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:34,115 INFO L82 PathProgramCache]: Analyzing trace with hash 531359868, now seen corresponding path program 1 times [2020-10-24 02:24:34,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:34,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144619530] [2020-10-24 02:24:34,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:34,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:34,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 02:24:34,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144619530] [2020-10-24 02:24:34,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:34,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 02:24:34,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752258558] [2020-10-24 02:24:34,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:24:34,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:34,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:24:34,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:24:34,260 INFO L87 Difference]: Start difference. First operand 85 states and 90 transitions. Second operand 6 states. [2020-10-24 02:24:34,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:34,479 INFO L93 Difference]: Finished difference Result 160 states and 170 transitions. [2020-10-24 02:24:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:24:34,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-24 02:24:34,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:34,481 INFO L225 Difference]: With dead ends: 160 [2020-10-24 02:24:34,481 INFO L226 Difference]: Without dead ends: 102 [2020-10-24 02:24:34,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:24:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-24 02:24:34,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2020-10-24 02:24:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-24 02:24:34,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 97 transitions. [2020-10-24 02:24:34,496 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 97 transitions. Word has length 61 [2020-10-24 02:24:34,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:34,497 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 97 transitions. [2020-10-24 02:24:34,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:24:34,497 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 97 transitions. [2020-10-24 02:24:34,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-24 02:24:34,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:34,500 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:24:34,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:24:34,500 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:34,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:34,501 INFO L82 PathProgramCache]: Analyzing trace with hash 2109050272, now seen corresponding path program 2 times [2020-10-24 02:24:34,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:34,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435045966] [2020-10-24 02:24:34,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:34,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:34,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:34,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:24:34,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435045966] [2020-10-24 02:24:34,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:34,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 02:24:34,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889253037] [2020-10-24 02:24:34,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:24:34,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:34,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:24:34,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:24:34,657 INFO L87 Difference]: Start difference. First operand 92 states and 97 transitions. Second operand 6 states. [2020-10-24 02:24:34,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:34,960 INFO L93 Difference]: Finished difference Result 150 states and 159 transitions. [2020-10-24 02:24:34,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:24:34,961 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-24 02:24:34,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:34,963 INFO L225 Difference]: With dead ends: 150 [2020-10-24 02:24:34,964 INFO L226 Difference]: Without dead ends: 104 [2020-10-24 02:24:34,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:24:34,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-24 02:24:34,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2020-10-24 02:24:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-24 02:24:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2020-10-24 02:24:34,991 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 68 [2020-10-24 02:24:34,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:34,991 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2020-10-24 02:24:34,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:24:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2020-10-24 02:24:34,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-24 02:24:34,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:34,999 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:34,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:24:34,999 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:35,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:35,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1042508207, now seen corresponding path program 3 times [2020-10-24 02:24:35,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:35,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462587160] [2020-10-24 02:24:35,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:35,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:35,177 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:24:35,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462587160] [2020-10-24 02:24:35,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:35,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 02:24:35,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670022225] [2020-10-24 02:24:35,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:24:35,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:35,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:24:35,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:24:35,180 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand 8 states. [2020-10-24 02:24:35,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:35,452 INFO L93 Difference]: Finished difference Result 176 states and 186 transitions. [2020-10-24 02:24:35,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 02:24:35,452 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 75 [2020-10-24 02:24:35,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:35,454 INFO L225 Difference]: With dead ends: 176 [2020-10-24 02:24:35,454 INFO L226 Difference]: Without dead ends: 111 [2020-10-24 02:24:35,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:24:35,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-24 02:24:35,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2020-10-24 02:24:35,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-24 02:24:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 111 transitions. [2020-10-24 02:24:35,467 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 111 transitions. Word has length 75 [2020-10-24 02:24:35,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:35,468 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 111 transitions. [2020-10-24 02:24:35,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:24:35,468 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 111 transitions. [2020-10-24 02:24:35,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-24 02:24:35,470 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:35,470 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:35,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:24:35,471 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:35,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1786539125, now seen corresponding path program 4 times [2020-10-24 02:24:35,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:35,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206663148] [2020-10-24 02:24:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:35,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:35,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:24:35,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206663148] [2020-10-24 02:24:35,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:35,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:24:35,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239056835] [2020-10-24 02:24:35,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:24:35,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:35,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:24:35,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:24:35,658 INFO L87 Difference]: Start difference. First operand 106 states and 111 transitions. Second operand 10 states. [2020-10-24 02:24:36,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:36,041 INFO L93 Difference]: Finished difference Result 183 states and 193 transitions. [2020-10-24 02:24:36,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:24:36,041 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 82 [2020-10-24 02:24:36,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:36,044 INFO L225 Difference]: With dead ends: 183 [2020-10-24 02:24:36,044 INFO L226 Difference]: Without dead ends: 118 [2020-10-24 02:24:36,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:24:36,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-24 02:24:36,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2020-10-24 02:24:36,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-24 02:24:36,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 118 transitions. [2020-10-24 02:24:36,062 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 118 transitions. Word has length 82 [2020-10-24 02:24:36,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:36,064 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 118 transitions. [2020-10-24 02:24:36,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:24:36,065 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 118 transitions. [2020-10-24 02:24:36,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-24 02:24:36,067 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:36,068 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:36,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:24:36,069 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:36,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:36,071 INFO L82 PathProgramCache]: Analyzing trace with hash 2016028113, now seen corresponding path program 5 times [2020-10-24 02:24:36,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:36,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [703292122] [2020-10-24 02:24:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:36,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:36,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-24 02:24:36,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [703292122] [2020-10-24 02:24:36,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:36,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:24:36,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419995883] [2020-10-24 02:24:36,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:24:36,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:36,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:24:36,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:24:36,303 INFO L87 Difference]: Start difference. First operand 113 states and 118 transitions. Second operand 12 states. [2020-10-24 02:24:36,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:36,759 INFO L93 Difference]: Finished difference Result 185 states and 195 transitions. [2020-10-24 02:24:36,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 02:24:36,760 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 89 [2020-10-24 02:24:36,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:36,762 INFO L225 Difference]: With dead ends: 185 [2020-10-24 02:24:36,762 INFO L226 Difference]: Without dead ends: 120 [2020-10-24 02:24:36,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:24:36,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-24 02:24:36,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-24 02:24:36,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-24 02:24:36,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-10-24 02:24:36,773 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 89 [2020-10-24 02:24:36,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:36,774 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-10-24 02:24:36,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:24:36,774 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-10-24 02:24:36,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-24 02:24:36,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:36,776 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:36,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:24:36,776 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:36,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:36,777 INFO L82 PathProgramCache]: Analyzing trace with hash 741764341, now seen corresponding path program 6 times [2020-10-24 02:24:36,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:36,777 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030987038] [2020-10-24 02:24:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:36,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-24 02:24:36,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030987038] [2020-10-24 02:24:36,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:36,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-24 02:24:36,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665388316] [2020-10-24 02:24:36,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:24:36,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:36,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:24:36,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:24:36,885 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 8 states. [2020-10-24 02:24:37,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:37,111 INFO L93 Difference]: Finished difference Result 178 states and 187 transitions. [2020-10-24 02:24:37,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-24 02:24:37,112 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 96 [2020-10-24 02:24:37,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:37,113 INFO L225 Difference]: With dead ends: 178 [2020-10-24 02:24:37,113 INFO L226 Difference]: Without dead ends: 132 [2020-10-24 02:24:37,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:24:37,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-24 02:24:37,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2020-10-24 02:24:37,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-24 02:24:37,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 132 transitions. [2020-10-24 02:24:37,125 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 132 transitions. Word has length 96 [2020-10-24 02:24:37,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:37,125 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 132 transitions. [2020-10-24 02:24:37,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:24:37,126 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 132 transitions. [2020-10-24 02:24:37,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-24 02:24:37,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:37,128 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 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, 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 02:24:37,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:24:37,129 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:37,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:37,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1731640668, now seen corresponding path program 7 times [2020-10-24 02:24:37,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:37,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919007354] [2020-10-24 02:24:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:37,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-24 02:24:37,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919007354] [2020-10-24 02:24:37,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:37,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:24:37,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284200544] [2020-10-24 02:24:37,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:24:37,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:37,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:24:37,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:24:37,322 INFO L87 Difference]: Start difference. First operand 127 states and 132 transitions. Second operand 10 states. [2020-10-24 02:24:37,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:37,649 INFO L93 Difference]: Finished difference Result 185 states and 194 transitions. [2020-10-24 02:24:37,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:24:37,650 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 103 [2020-10-24 02:24:37,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:37,652 INFO L225 Difference]: With dead ends: 185 [2020-10-24 02:24:37,652 INFO L226 Difference]: Without dead ends: 139 [2020-10-24 02:24:37,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:24:37,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-24 02:24:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2020-10-24 02:24:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-24 02:24:37,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 139 transitions. [2020-10-24 02:24:37,667 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 139 transitions. Word has length 103 [2020-10-24 02:24:37,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:37,668 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 139 transitions. [2020-10-24 02:24:37,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:24:37,668 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 139 transitions. [2020-10-24 02:24:37,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-24 02:24:37,673 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:37,674 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:37,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 02:24:37,674 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:37,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:37,675 INFO L82 PathProgramCache]: Analyzing trace with hash -170558699, now seen corresponding path program 8 times [2020-10-24 02:24:37,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:37,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137447683] [2020-10-24 02:24:37,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:37,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:37,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:37,863 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-24 02:24:37,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137447683] [2020-10-24 02:24:37,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:37,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:24:37,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935670217] [2020-10-24 02:24:37,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:24:37,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:37,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:24:37,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:24:37,866 INFO L87 Difference]: Start difference. First operand 134 states and 139 transitions. Second operand 12 states. [2020-10-24 02:24:38,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:38,313 INFO L93 Difference]: Finished difference Result 187 states and 196 transitions. [2020-10-24 02:24:38,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-24 02:24:38,314 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 110 [2020-10-24 02:24:38,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:38,316 INFO L225 Difference]: With dead ends: 187 [2020-10-24 02:24:38,316 INFO L226 Difference]: Without dead ends: 141 [2020-10-24 02:24:38,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:24:38,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-24 02:24:38,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-10-24 02:24:38,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-24 02:24:38,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 146 transitions. [2020-10-24 02:24:38,328 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 146 transitions. Word has length 110 [2020-10-24 02:24:38,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:38,329 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 146 transitions. [2020-10-24 02:24:38,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:24:38,329 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 146 transitions. [2020-10-24 02:24:38,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-24 02:24:38,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:38,331 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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, 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 02:24:38,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 02:24:38,331 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:38,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:38,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1454273732, now seen corresponding path program 9 times [2020-10-24 02:24:38,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:38,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118922630] [2020-10-24 02:24:38,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:38,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:38,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-24 02:24:38,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118922630] [2020-10-24 02:24:38,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:24:38,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 02:24:38,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618351805] [2020-10-24 02:24:38,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 02:24:38,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:38,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 02:24:38,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-24 02:24:38,481 INFO L87 Difference]: Start difference. First operand 141 states and 146 transitions. Second operand 8 states. [2020-10-24 02:24:38,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:38,813 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2020-10-24 02:24:38,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-24 02:24:38,814 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 117 [2020-10-24 02:24:38,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:38,816 INFO L225 Difference]: With dead ends: 179 [2020-10-24 02:24:38,816 INFO L226 Difference]: Without dead ends: 146 [2020-10-24 02:24:38,817 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:24:38,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-24 02:24:38,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2020-10-24 02:24:38,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-24 02:24:38,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 148 transitions. [2020-10-24 02:24:38,827 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 148 transitions. Word has length 117 [2020-10-24 02:24:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:38,828 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 148 transitions. [2020-10-24 02:24:38,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 02:24:38,828 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 148 transitions. [2020-10-24 02:24:38,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-24 02:24:38,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:38,831 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:38,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 02:24:38,832 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:38,833 INFO L82 PathProgramCache]: Analyzing trace with hash -799740924, now seen corresponding path program 1 times [2020-10-24 02:24:38,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:38,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514310413] [2020-10-24 02:24:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:38,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:39,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:39,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-24 02:24:39,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514310413] [2020-10-24 02:24:39,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:39,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:24:39,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100215001] [2020-10-24 02:24:39,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:24:39,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:39,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:24:39,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:24:39,106 INFO L87 Difference]: Start difference. First operand 143 states and 148 transitions. Second operand 10 states. [2020-10-24 02:24:39,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:39,511 INFO L93 Difference]: Finished difference Result 183 states and 191 transitions. [2020-10-24 02:24:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:24:39,511 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 123 [2020-10-24 02:24:39,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:39,514 INFO L225 Difference]: With dead ends: 183 [2020-10-24 02:24:39,515 INFO L226 Difference]: Without dead ends: 175 [2020-10-24 02:24:39,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:24:39,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-24 02:24:39,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 170. [2020-10-24 02:24:39,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-24 02:24:39,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 178 transitions. [2020-10-24 02:24:39,531 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 178 transitions. Word has length 123 [2020-10-24 02:24:39,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:39,531 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 178 transitions. [2020-10-24 02:24:39,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:24:39,531 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 178 transitions. [2020-10-24 02:24:39,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-24 02:24:39,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:39,533 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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 02:24:39,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 02:24:39,534 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:39,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:39,534 INFO L82 PathProgramCache]: Analyzing trace with hash 321820364, now seen corresponding path program 2 times [2020-10-24 02:24:39,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:39,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099413700] [2020-10-24 02:24:39,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:39,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:39,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:39,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:39,723 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-24 02:24:39,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099413700] [2020-10-24 02:24:39,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:39,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:24:39,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002289824] [2020-10-24 02:24:39,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:24:39,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:39,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:24:39,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:24:39,727 INFO L87 Difference]: Start difference. First operand 170 states and 178 transitions. Second operand 12 states. [2020-10-24 02:24:40,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:40,320 INFO L93 Difference]: Finished difference Result 184 states and 192 transitions. [2020-10-24 02:24:40,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-24 02:24:40,321 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 129 [2020-10-24 02:24:40,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:40,322 INFO L225 Difference]: With dead ends: 184 [2020-10-24 02:24:40,322 INFO L226 Difference]: Without dead ends: 176 [2020-10-24 02:24:40,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-24 02:24:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-24 02:24:40,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 144. [2020-10-24 02:24:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-24 02:24:40,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-10-24 02:24:40,338 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 129 [2020-10-24 02:24:40,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:40,339 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-10-24 02:24:40,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:24:40,339 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-10-24 02:24:40,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-24 02:24:40,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:40,341 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 1] [2020-10-24 02:24:40,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 02:24:40,341 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:40,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1541151436, now seen corresponding path program 1 times [2020-10-24 02:24:40,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:40,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965509851] [2020-10-24 02:24:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:40,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:40,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2020-10-24 02:24:40,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965509851] [2020-10-24 02:24:40,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:24:40,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 02:24:40,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89133568] [2020-10-24 02:24:40,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:24:40,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:40,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:24:40,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:24:40,443 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 6 states. [2020-10-24 02:24:40,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:40,620 INFO L93 Difference]: Finished difference Result 189 states and 197 transitions. [2020-10-24 02:24:40,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:24:40,621 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 135 [2020-10-24 02:24:40,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:40,622 INFO L225 Difference]: With dead ends: 189 [2020-10-24 02:24:40,622 INFO L226 Difference]: Without dead ends: 149 [2020-10-24 02:24:40,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:24:40,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-24 02:24:40,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 146. [2020-10-24 02:24:40,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-24 02:24:40,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 151 transitions. [2020-10-24 02:24:40,638 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 151 transitions. Word has length 135 [2020-10-24 02:24:40,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:40,638 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 151 transitions. [2020-10-24 02:24:40,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:24:40,638 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 151 transitions. [2020-10-24 02:24:40,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-24 02:24:40,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:40,640 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:40,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 02:24:40,640 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:40,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:40,641 INFO L82 PathProgramCache]: Analyzing trace with hash -307444684, now seen corresponding path program 1 times [2020-10-24 02:24:40,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:40,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173578570] [2020-10-24 02:24:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:40,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:40,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:40,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2020-10-24 02:24:40,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173578570] [2020-10-24 02:24:40,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:40,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:24:40,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097499718] [2020-10-24 02:24:40,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:24:40,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:40,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:24:40,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:24:40,848 INFO L87 Difference]: Start difference. First operand 146 states and 151 transitions. Second operand 12 states. [2020-10-24 02:24:41,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:41,273 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2020-10-24 02:24:41,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-24 02:24:41,274 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 141 [2020-10-24 02:24:41,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:41,275 INFO L225 Difference]: With dead ends: 205 [2020-10-24 02:24:41,275 INFO L226 Difference]: Without dead ends: 155 [2020-10-24 02:24:41,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:24:41,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-24 02:24:41,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-10-24 02:24:41,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-24 02:24:41,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 157 transitions. [2020-10-24 02:24:41,293 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 157 transitions. Word has length 141 [2020-10-24 02:24:41,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:41,294 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 157 transitions. [2020-10-24 02:24:41,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:24:41,294 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 157 transitions. [2020-10-24 02:24:41,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-24 02:24:41,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:41,296 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1] [2020-10-24 02:24:41,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-24 02:24:41,297 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:41,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:41,297 INFO L82 PathProgramCache]: Analyzing trace with hash -363211524, now seen corresponding path program 2 times [2020-10-24 02:24:41,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:41,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560918491] [2020-10-24 02:24:41,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:41,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:41,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2020-10-24 02:24:41,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560918491] [2020-10-24 02:24:41,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:41,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-24 02:24:41,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655894210] [2020-10-24 02:24:41,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 02:24:41,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:41,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 02:24:41,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:24:41,611 INFO L87 Difference]: Start difference. First operand 152 states and 157 transitions. Second operand 14 states. [2020-10-24 02:24:42,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:42,189 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2020-10-24 02:24:42,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-24 02:24:42,192 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 147 [2020-10-24 02:24:42,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:42,194 INFO L225 Difference]: With dead ends: 179 [2020-10-24 02:24:42,194 INFO L226 Difference]: Without dead ends: 171 [2020-10-24 02:24:42,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2020-10-24 02:24:42,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-24 02:24:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 164. [2020-10-24 02:24:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-24 02:24:42,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 170 transitions. [2020-10-24 02:24:42,212 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 170 transitions. Word has length 147 [2020-10-24 02:24:42,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:42,213 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 170 transitions. [2020-10-24 02:24:42,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 02:24:42,213 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 170 transitions. [2020-10-24 02:24:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-10-24 02:24:42,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:42,215 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:42,215 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-24 02:24:42,215 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:42,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:42,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1555255236, now seen corresponding path program 3 times [2020-10-24 02:24:42,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:42,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427734136] [2020-10-24 02:24:42,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:42,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:42,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:42,389 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-10-24 02:24:42,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427734136] [2020-10-24 02:24:42,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:42,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-24 02:24:42,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122789464] [2020-10-24 02:24:42,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-24 02:24:42,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:42,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-24 02:24:42,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:24:42,395 INFO L87 Difference]: Start difference. First operand 164 states and 170 transitions. Second operand 10 states. [2020-10-24 02:24:42,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:42,720 INFO L93 Difference]: Finished difference Result 248 states and 259 transitions. [2020-10-24 02:24:42,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:24:42,720 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 159 [2020-10-24 02:24:42,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:42,722 INFO L225 Difference]: With dead ends: 248 [2020-10-24 02:24:42,722 INFO L226 Difference]: Without dead ends: 173 [2020-10-24 02:24:42,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:24:42,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-24 02:24:42,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2020-10-24 02:24:42,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-24 02:24:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 176 transitions. [2020-10-24 02:24:42,738 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 176 transitions. Word has length 159 [2020-10-24 02:24:42,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:42,739 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 176 transitions. [2020-10-24 02:24:42,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-24 02:24:42,739 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 176 transitions. [2020-10-24 02:24:42,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-24 02:24:42,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:42,741 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:42,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-24 02:24:42,742 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:42,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:42,743 INFO L82 PathProgramCache]: Analyzing trace with hash 351813932, now seen corresponding path program 4 times [2020-10-24 02:24:42,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:42,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090831659] [2020-10-24 02:24:42,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:42,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:42,991 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-10-24 02:24:42,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090831659] [2020-10-24 02:24:42,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:42,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-24 02:24:42,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545973711] [2020-10-24 02:24:42,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 02:24:42,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:42,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 02:24:42,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2020-10-24 02:24:42,999 INFO L87 Difference]: Start difference. First operand 170 states and 176 transitions. Second operand 16 states. [2020-10-24 02:24:43,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:43,665 INFO L93 Difference]: Finished difference Result 257 states and 269 transitions. [2020-10-24 02:24:43,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-24 02:24:43,666 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 165 [2020-10-24 02:24:43,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:43,668 INFO L225 Difference]: With dead ends: 257 [2020-10-24 02:24:43,668 INFO L226 Difference]: Without dead ends: 179 [2020-10-24 02:24:43,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2020-10-24 02:24:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-24 02:24:43,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 176. [2020-10-24 02:24:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-24 02:24:43,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 182 transitions. [2020-10-24 02:24:43,684 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 182 transitions. Word has length 165 [2020-10-24 02:24:43,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:43,684 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 182 transitions. [2020-10-24 02:24:43,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 02:24:43,684 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 182 transitions. [2020-10-24 02:24:43,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-24 02:24:43,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:43,687 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:43,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-24 02:24:43,687 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:43,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:43,688 INFO L82 PathProgramCache]: Analyzing trace with hash 1810694644, now seen corresponding path program 5 times [2020-10-24 02:24:43,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:43,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105825604] [2020-10-24 02:24:43,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:43,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2020-10-24 02:24:43,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105825604] [2020-10-24 02:24:43,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:43,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:24:43,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562059311] [2020-10-24 02:24:43,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:24:43,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:43,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:24:43,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:24:43,969 INFO L87 Difference]: Start difference. First operand 176 states and 182 transitions. Second operand 18 states. [2020-10-24 02:24:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:44,772 INFO L93 Difference]: Finished difference Result 207 states and 214 transitions. [2020-10-24 02:24:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 02:24:44,773 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 171 [2020-10-24 02:24:44,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:44,775 INFO L225 Difference]: With dead ends: 207 [2020-10-24 02:24:44,775 INFO L226 Difference]: Without dead ends: 199 [2020-10-24 02:24:44,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=231, Invalid=1101, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 02:24:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-24 02:24:44,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 188. [2020-10-24 02:24:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-24 02:24:44,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 195 transitions. [2020-10-24 02:24:44,793 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 195 transitions. Word has length 171 [2020-10-24 02:24:44,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:44,794 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 195 transitions. [2020-10-24 02:24:44,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:24:44,794 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 195 transitions. [2020-10-24 02:24:44,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2020-10-24 02:24:44,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:44,796 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 02:24:44,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-24 02:24:44,797 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:44,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:44,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1378694980, now seen corresponding path program 6 times [2020-10-24 02:24:44,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:44,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896370557] [2020-10-24 02:24:44,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:44,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:44,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:44,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 30 proven. 19 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-10-24 02:24:45,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896370557] [2020-10-24 02:24:45,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:45,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-24 02:24:45,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930975696] [2020-10-24 02:24:45,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-24 02:24:45,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:45,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-24 02:24:45,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-10-24 02:24:45,048 INFO L87 Difference]: Start difference. First operand 188 states and 195 transitions. Second operand 14 states. [2020-10-24 02:24:45,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:45,743 INFO L93 Difference]: Finished difference Result 369 states and 388 transitions. [2020-10-24 02:24:45,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-24 02:24:45,744 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 183 [2020-10-24 02:24:45,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:45,747 INFO L225 Difference]: With dead ends: 369 [2020-10-24 02:24:45,747 INFO L226 Difference]: Without dead ends: 289 [2020-10-24 02:24:45,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2020-10-24 02:24:45,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2020-10-24 02:24:45,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 236. [2020-10-24 02:24:45,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-24 02:24:45,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 245 transitions. [2020-10-24 02:24:45,769 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 245 transitions. Word has length 183 [2020-10-24 02:24:45,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:45,769 INFO L481 AbstractCegarLoop]: Abstraction has 236 states and 245 transitions. [2020-10-24 02:24:45,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-24 02:24:45,770 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 245 transitions. [2020-10-24 02:24:45,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-24 02:24:45,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:45,772 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 02:24:45,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-24 02:24:45,773 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:45,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:45,773 INFO L82 PathProgramCache]: Analyzing trace with hash 104071716, now seen corresponding path program 7 times [2020-10-24 02:24:45,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:45,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630552781] [2020-10-24 02:24:45,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:46,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 16 proven. 47 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-10-24 02:24:46,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630552781] [2020-10-24 02:24:46,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:46,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-24 02:24:46,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035353372] [2020-10-24 02:24:46,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-24 02:24:46,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:46,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-24 02:24:46,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2020-10-24 02:24:46,131 INFO L87 Difference]: Start difference. First operand 236 states and 245 transitions. Second operand 20 states. [2020-10-24 02:24:47,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:47,048 INFO L93 Difference]: Finished difference Result 380 states and 398 transitions. [2020-10-24 02:24:47,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-24 02:24:47,048 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 189 [2020-10-24 02:24:47,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:47,051 INFO L225 Difference]: With dead ends: 380 [2020-10-24 02:24:47,051 INFO L226 Difference]: Without dead ends: 254 [2020-10-24 02:24:47,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=1211, Unknown=0, NotChecked=0, Total=1406 [2020-10-24 02:24:47,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-24 02:24:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 248. [2020-10-24 02:24:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-24 02:24:47,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 257 transitions. [2020-10-24 02:24:47,076 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 257 transitions. Word has length 189 [2020-10-24 02:24:47,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:47,076 INFO L481 AbstractCegarLoop]: Abstraction has 248 states and 257 transitions. [2020-10-24 02:24:47,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-24 02:24:47,076 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 257 transitions. [2020-10-24 02:24:47,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-24 02:24:47,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:47,080 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 02:24:47,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-24 02:24:47,080 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:47,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:47,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1299287316, now seen corresponding path program 8 times [2020-10-24 02:24:47,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:47,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000166477] [2020-10-24 02:24:47,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:47,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:47,472 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 27 proven. 56 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-10-24 02:24:47,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000166477] [2020-10-24 02:24:47,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:47,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-24 02:24:47,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849647195] [2020-10-24 02:24:47,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 02:24:47,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:47,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 02:24:47,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2020-10-24 02:24:47,474 INFO L87 Difference]: Start difference. First operand 248 states and 257 transitions. Second operand 22 states. [2020-10-24 02:24:48,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:48,563 INFO L93 Difference]: Finished difference Result 286 states and 296 transitions. [2020-10-24 02:24:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-24 02:24:48,564 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 195 [2020-10-24 02:24:48,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:48,566 INFO L225 Difference]: With dead ends: 286 [2020-10-24 02:24:48,566 INFO L226 Difference]: Without dead ends: 278 [2020-10-24 02:24:48,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=379, Invalid=1783, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 02:24:48,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-24 02:24:48,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 260. [2020-10-24 02:24:48,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-24 02:24:48,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 270 transitions. [2020-10-24 02:24:48,590 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 270 transitions. Word has length 195 [2020-10-24 02:24:48,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:48,591 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 270 transitions. [2020-10-24 02:24:48,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 02:24:48,591 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 270 transitions. [2020-10-24 02:24:48,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-24 02:24:48,594 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:48,594 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 02:24:48,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-24 02:24:48,595 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:48,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1824163252, now seen corresponding path program 9 times [2020-10-24 02:24:48,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:48,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800892288] [2020-10-24 02:24:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:48,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:48,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 59 proven. 41 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-10-24 02:24:48,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800892288] [2020-10-24 02:24:48,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:48,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-24 02:24:48,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566043253] [2020-10-24 02:24:48,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-24 02:24:48,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:48,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-24 02:24:48,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-10-24 02:24:48,906 INFO L87 Difference]: Start difference. First operand 260 states and 270 transitions. Second operand 18 states. [2020-10-24 02:24:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:50,146 INFO L93 Difference]: Finished difference Result 577 states and 609 transitions. [2020-10-24 02:24:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-24 02:24:50,146 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 207 [2020-10-24 02:24:50,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:50,150 INFO L225 Difference]: With dead ends: 577 [2020-10-24 02:24:50,150 INFO L226 Difference]: Without dead ends: 476 [2020-10-24 02:24:50,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=346, Invalid=1816, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 02:24:50,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2020-10-24 02:24:50,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 318. [2020-10-24 02:24:50,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-24 02:24:50,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 332 transitions. [2020-10-24 02:24:50,190 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 332 transitions. Word has length 207 [2020-10-24 02:24:50,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:50,191 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 332 transitions. [2020-10-24 02:24:50,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-24 02:24:50,191 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 332 transitions. [2020-10-24 02:24:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-24 02:24:50,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:50,195 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:50,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-24 02:24:50,195 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:50,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:50,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1725957916, now seen corresponding path program 10 times [2020-10-24 02:24:50,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:50,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358987584] [2020-10-24 02:24:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:50,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 42 proven. 78 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-10-24 02:24:50,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358987584] [2020-10-24 02:24:50,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:50,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-24 02:24:50,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743667932] [2020-10-24 02:24:50,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-24 02:24:50,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:50,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-24 02:24:50,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-24 02:24:50,609 INFO L87 Difference]: Start difference. First operand 318 states and 332 transitions. Second operand 24 states. [2020-10-24 02:24:51,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:51,877 INFO L93 Difference]: Finished difference Result 535 states and 563 transitions. [2020-10-24 02:24:51,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-24 02:24:51,880 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 213 [2020-10-24 02:24:51,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:51,882 INFO L225 Difference]: With dead ends: 535 [2020-10-24 02:24:51,883 INFO L226 Difference]: Without dead ends: 345 [2020-10-24 02:24:51,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=1866, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 02:24:51,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-24 02:24:51,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 336. [2020-10-24 02:24:51,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-10-24 02:24:51,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 350 transitions. [2020-10-24 02:24:51,916 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 350 transitions. Word has length 213 [2020-10-24 02:24:51,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:51,916 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 350 transitions. [2020-10-24 02:24:51,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-24 02:24:51,916 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 350 transitions. [2020-10-24 02:24:51,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-10-24 02:24:51,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:51,920 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:51,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-24 02:24:51,920 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:51,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:51,920 INFO L82 PathProgramCache]: Analyzing trace with hash 977151972, now seen corresponding path program 11 times [2020-10-24 02:24:51,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:51,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310282729] [2020-10-24 02:24:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:51,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:52,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 340 backedges. 48 proven. 98 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2020-10-24 02:24:52,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310282729] [2020-10-24 02:24:52,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:52,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-24 02:24:52,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112655176] [2020-10-24 02:24:52,420 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-24 02:24:52,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:52,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-24 02:24:52,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2020-10-24 02:24:52,421 INFO L87 Difference]: Start difference. First operand 336 states and 350 transitions. Second operand 26 states. [2020-10-24 02:24:53,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:53,758 INFO L93 Difference]: Finished difference Result 393 states and 408 transitions. [2020-10-24 02:24:53,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-24 02:24:53,759 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 219 [2020-10-24 02:24:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:53,762 INFO L225 Difference]: With dead ends: 393 [2020-10-24 02:24:53,762 INFO L226 Difference]: Without dead ends: 385 [2020-10-24 02:24:53,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=567, Invalid=2625, Unknown=0, NotChecked=0, Total=3192 [2020-10-24 02:24:53,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2020-10-24 02:24:53,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 348. [2020-10-24 02:24:53,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-10-24 02:24:53,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 363 transitions. [2020-10-24 02:24:53,799 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 363 transitions. Word has length 219 [2020-10-24 02:24:53,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:53,800 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 363 transitions. [2020-10-24 02:24:53,800 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-24 02:24:53,800 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 363 transitions. [2020-10-24 02:24:53,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-24 02:24:53,803 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:53,803 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:53,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-24 02:24:53,804 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:53,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:53,804 INFO L82 PathProgramCache]: Analyzing trace with hash 359302828, now seen corresponding path program 12 times [2020-10-24 02:24:53,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:53,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111695814] [2020-10-24 02:24:53,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:54,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 100 proven. 69 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-24 02:24:54,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111695814] [2020-10-24 02:24:54,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:54,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-24 02:24:54,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663096603] [2020-10-24 02:24:54,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-24 02:24:54,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:54,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-24 02:24:54,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2020-10-24 02:24:54,197 INFO L87 Difference]: Start difference. First operand 348 states and 363 transitions. Second operand 22 states. [2020-10-24 02:24:56,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:56,103 INFO L93 Difference]: Finished difference Result 863 states and 913 transitions. [2020-10-24 02:24:56,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-24 02:24:56,104 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 231 [2020-10-24 02:24:56,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:56,109 INFO L225 Difference]: With dead ends: 863 [2020-10-24 02:24:56,110 INFO L226 Difference]: Without dead ends: 741 [2020-10-24 02:24:56,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=768, Invalid=4202, Unknown=0, NotChecked=0, Total=4970 [2020-10-24 02:24:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2020-10-24 02:24:56,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 412. [2020-10-24 02:24:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-10-24 02:24:56,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 431 transitions. [2020-10-24 02:24:56,166 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 431 transitions. Word has length 231 [2020-10-24 02:24:56,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:56,167 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 431 transitions. [2020-10-24 02:24:56,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-24 02:24:56,167 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 431 transitions. [2020-10-24 02:24:56,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-24 02:24:56,170 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:56,170 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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 02:24:56,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-24 02:24:56,171 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:56,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:56,173 INFO L82 PathProgramCache]: Analyzing trace with hash 989614100, now seen corresponding path program 13 times [2020-10-24 02:24:56,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:56,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624126794] [2020-10-24 02:24:56,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:59,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 37 proven. 231 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-24 02:24:59,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624126794] [2020-10-24 02:24:59,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:24:59,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-24 02:24:59,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216099588] [2020-10-24 02:24:59,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-24 02:24:59,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:59,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-24 02:24:59,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=1886, Unknown=0, NotChecked=0, Total=2070 [2020-10-24 02:24:59,552 INFO L87 Difference]: Start difference. First operand 412 states and 431 transitions. Second operand 46 states. [2020-10-24 02:25:08,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:08,596 INFO L93 Difference]: Finished difference Result 849 states and 901 transitions. [2020-10-24 02:25:08,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-24 02:25:08,597 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 237 [2020-10-24 02:25:08,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:08,602 INFO L225 Difference]: With dead ends: 849 [2020-10-24 02:25:08,602 INFO L226 Difference]: Without dead ends: 776 [2020-10-24 02:25:08,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2377 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=753, Invalid=10803, Unknown=0, NotChecked=0, Total=11556 [2020-10-24 02:25:08,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2020-10-24 02:25:08,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 428. [2020-10-24 02:25:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 428 states. [2020-10-24 02:25:08,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 449 transitions. [2020-10-24 02:25:08,678 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 449 transitions. Word has length 237 [2020-10-24 02:25:08,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:08,679 INFO L481 AbstractCegarLoop]: Abstraction has 428 states and 449 transitions. [2020-10-24 02:25:08,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-24 02:25:08,679 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 449 transitions. [2020-10-24 02:25:08,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2020-10-24 02:25:08,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:08,682 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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 02:25:08,683 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-24 02:25:08,683 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:08,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:08,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1517921228, now seen corresponding path program 1 times [2020-10-24 02:25:08,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:08,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752400430] [2020-10-24 02:25:08,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:09,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:09,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 141 proven. 80 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-24 02:25:09,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752400430] [2020-10-24 02:25:09,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:09,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-24 02:25:09,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614107529] [2020-10-24 02:25:09,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-24 02:25:09,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:09,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-24 02:25:09,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-10-24 02:25:09,180 INFO L87 Difference]: Start difference. First operand 428 states and 449 transitions. Second operand 23 states. [2020-10-24 02:25:10,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:10,084 INFO L93 Difference]: Finished difference Result 539 states and 566 transitions. [2020-10-24 02:25:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-24 02:25:10,085 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 239 [2020-10-24 02:25:10,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:10,087 INFO L225 Difference]: With dead ends: 539 [2020-10-24 02:25:10,088 INFO L226 Difference]: Without dead ends: 390 [2020-10-24 02:25:10,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=1329, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 02:25:10,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-24 02:25:10,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2020-10-24 02:25:10,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-10-24 02:25:10,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 409 transitions. [2020-10-24 02:25:10,151 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 409 transitions. Word has length 239 [2020-10-24 02:25:10,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:10,151 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 409 transitions. [2020-10-24 02:25:10,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-24 02:25:10,152 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 409 transitions. [2020-10-24 02:25:10,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-24 02:25:10,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:10,154 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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 02:25:10,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-24 02:25:10,154 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:10,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:10,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1593033316, now seen corresponding path program 2 times [2020-10-24 02:25:10,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:10,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253270612] [2020-10-24 02:25:10,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 141 proven. 94 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-24 02:25:10,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253270612] [2020-10-24 02:25:10,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:10,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-24 02:25:10,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118563746] [2020-10-24 02:25:10,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-24 02:25:10,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:10,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-24 02:25:10,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:25:10,674 INFO L87 Difference]: Start difference. First operand 390 states and 409 transitions. Second operand 25 states. [2020-10-24 02:25:12,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:12,355 INFO L93 Difference]: Finished difference Result 639 states and 674 transitions. [2020-10-24 02:25:12,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-24 02:25:12,356 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 245 [2020-10-24 02:25:12,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:12,359 INFO L225 Difference]: With dead ends: 639 [2020-10-24 02:25:12,359 INFO L226 Difference]: Without dead ends: 492 [2020-10-24 02:25:12,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=447, Invalid=2633, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 02:25:12,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2020-10-24 02:25:12,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 402. [2020-10-24 02:25:12,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 402 states. [2020-10-24 02:25:12,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 421 transitions. [2020-10-24 02:25:12,439 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 421 transitions. Word has length 245 [2020-10-24 02:25:12,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:12,439 INFO L481 AbstractCegarLoop]: Abstraction has 402 states and 421 transitions. [2020-10-24 02:25:12,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-24 02:25:12,439 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 421 transitions. [2020-10-24 02:25:12,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-24 02:25:12,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:12,442 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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 02:25:12,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-24 02:25:12,442 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:12,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:12,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1763846052, now seen corresponding path program 3 times [2020-10-24 02:25:12,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:12,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [267153411] [2020-10-24 02:25:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 436 backedges. 129 proven. 87 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-24 02:25:12,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [267153411] [2020-10-24 02:25:12,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:12,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-24 02:25:12,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121238214] [2020-10-24 02:25:12,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-24 02:25:12,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:12,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-24 02:25:12,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:25:12,906 INFO L87 Difference]: Start difference. First operand 402 states and 421 transitions. Second operand 25 states. [2020-10-24 02:25:15,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:15,622 INFO L93 Difference]: Finished difference Result 1019 states and 1079 transitions. [2020-10-24 02:25:15,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-24 02:25:15,623 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 245 [2020-10-24 02:25:15,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:15,629 INFO L225 Difference]: With dead ends: 1019 [2020-10-24 02:25:15,629 INFO L226 Difference]: Without dead ends: 897 [2020-10-24 02:25:15,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1070, Invalid=6070, Unknown=0, NotChecked=0, Total=7140 [2020-10-24 02:25:15,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2020-10-24 02:25:15,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 454. [2020-10-24 02:25:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 454 states. [2020-10-24 02:25:15,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 476 transitions. [2020-10-24 02:25:15,723 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 476 transitions. Word has length 245 [2020-10-24 02:25:15,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:15,723 INFO L481 AbstractCegarLoop]: Abstraction has 454 states and 476 transitions. [2020-10-24 02:25:15,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-24 02:25:15,724 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 476 transitions. [2020-10-24 02:25:15,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-24 02:25:15,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:15,726 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:15,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-24 02:25:15,726 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:15,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:15,727 INFO L82 PathProgramCache]: Analyzing trace with hash -59936508, now seen corresponding path program 4 times [2020-10-24 02:25:15,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:15,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821135102] [2020-10-24 02:25:15,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:16,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 141 proven. 114 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-24 02:25:16,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821135102] [2020-10-24 02:25:16,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:16,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-24 02:25:16,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237606796] [2020-10-24 02:25:16,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-24 02:25:16,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:16,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-24 02:25:16,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2020-10-24 02:25:16,280 INFO L87 Difference]: Start difference. First operand 454 states and 476 transitions. Second operand 27 states. [2020-10-24 02:25:19,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:19,188 INFO L93 Difference]: Finished difference Result 876 states and 926 transitions. [2020-10-24 02:25:19,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-24 02:25:19,189 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 251 [2020-10-24 02:25:19,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:19,193 INFO L225 Difference]: With dead ends: 876 [2020-10-24 02:25:19,193 INFO L226 Difference]: Without dead ends: 763 [2020-10-24 02:25:19,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=901, Invalid=5741, Unknown=0, NotChecked=0, Total=6642 [2020-10-24 02:25:19,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2020-10-24 02:25:19,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 510. [2020-10-24 02:25:19,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510 states. [2020-10-24 02:25:19,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 536 transitions. [2020-10-24 02:25:19,326 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 536 transitions. Word has length 251 [2020-10-24 02:25:19,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:19,326 INFO L481 AbstractCegarLoop]: Abstraction has 510 states and 536 transitions. [2020-10-24 02:25:19,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-24 02:25:19,326 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 536 transitions. [2020-10-24 02:25:19,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-24 02:25:19,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:19,329 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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 02:25:19,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-24 02:25:19,329 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:19,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:19,329 INFO L82 PathProgramCache]: Analyzing trace with hash -998024436, now seen corresponding path program 5 times [2020-10-24 02:25:19,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:19,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868907254] [2020-10-24 02:25:19,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:19,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:19,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 75 proven. 97 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2020-10-24 02:25:19,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1868907254] [2020-10-24 02:25:19,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:19,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-24 02:25:19,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990311093] [2020-10-24 02:25:19,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-24 02:25:19,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:19,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-24 02:25:19,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2020-10-24 02:25:19,956 INFO L87 Difference]: Start difference. First operand 510 states and 536 transitions. Second operand 27 states. [2020-10-24 02:25:22,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:22,396 INFO L93 Difference]: Finished difference Result 943 states and 1001 transitions. [2020-10-24 02:25:22,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-24 02:25:22,397 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 251 [2020-10-24 02:25:22,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:22,402 INFO L225 Difference]: With dead ends: 943 [2020-10-24 02:25:22,402 INFO L226 Difference]: Without dead ends: 814 [2020-10-24 02:25:22,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1406, Invalid=5566, Unknown=0, NotChecked=0, Total=6972 [2020-10-24 02:25:22,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 814 states. [2020-10-24 02:25:22,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 814 to 516. [2020-10-24 02:25:22,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 516 states. [2020-10-24 02:25:22,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 542 transitions. [2020-10-24 02:25:22,517 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 542 transitions. Word has length 251 [2020-10-24 02:25:22,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:22,518 INFO L481 AbstractCegarLoop]: Abstraction has 516 states and 542 transitions. [2020-10-24 02:25:22,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-24 02:25:22,518 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 542 transitions. [2020-10-24 02:25:22,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-24 02:25:22,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:22,520 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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 02:25:22,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-24 02:25:22,520 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:22,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:22,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1573214308, now seen corresponding path program 6 times [2020-10-24 02:25:22,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:22,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6880986] [2020-10-24 02:25:22,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:23,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 153 proven. 154 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-24 02:25:23,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6880986] [2020-10-24 02:25:23,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:23,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-24 02:25:23,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860972206] [2020-10-24 02:25:23,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-24 02:25:23,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:23,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-24 02:25:23,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2020-10-24 02:25:23,167 INFO L87 Difference]: Start difference. First operand 516 states and 542 transitions. Second operand 28 states. [2020-10-24 02:25:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:25,199 INFO L93 Difference]: Finished difference Result 660 states and 694 transitions. [2020-10-24 02:25:25,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-24 02:25:25,200 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 257 [2020-10-24 02:25:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:25,203 INFO L225 Difference]: With dead ends: 660 [2020-10-24 02:25:25,203 INFO L226 Difference]: Without dead ends: 466 [2020-10-24 02:25:25,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1052 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=597, Invalid=3435, Unknown=0, NotChecked=0, Total=4032 [2020-10-24 02:25:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-10-24 02:25:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 466. [2020-10-24 02:25:25,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 466 states. [2020-10-24 02:25:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 490 transitions. [2020-10-24 02:25:25,331 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 490 transitions. Word has length 257 [2020-10-24 02:25:25,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:25,332 INFO L481 AbstractCegarLoop]: Abstraction has 466 states and 490 transitions. [2020-10-24 02:25:25,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-24 02:25:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 490 transitions. [2020-10-24 02:25:25,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-24 02:25:25,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:25,334 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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 02:25:25,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-24 02:25:25,334 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:25,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:25,335 INFO L82 PathProgramCache]: Analyzing trace with hash -429623700, now seen corresponding path program 7 times [2020-10-24 02:25:25,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:25,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953501525] [2020-10-24 02:25:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:25,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:25,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 141 proven. 140 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2020-10-24 02:25:25,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953501525] [2020-10-24 02:25:25,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:25,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-24 02:25:25,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968862319] [2020-10-24 02:25:25,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-24 02:25:25,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:25,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-24 02:25:25,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2020-10-24 02:25:25,904 INFO L87 Difference]: Start difference. First operand 466 states and 490 transitions. Second operand 29 states. [2020-10-24 02:25:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:30,205 INFO L93 Difference]: Finished difference Result 1031 states and 1090 transitions. [2020-10-24 02:25:30,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-10-24 02:25:30,205 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 257 [2020-10-24 02:25:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:30,208 INFO L225 Difference]: With dead ends: 1031 [2020-10-24 02:25:30,209 INFO L226 Difference]: Without dead ends: 909 [2020-10-24 02:25:30,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4377 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1825, Invalid=11515, Unknown=0, NotChecked=0, Total=13340 [2020-10-24 02:25:30,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2020-10-24 02:25:30,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 514. [2020-10-24 02:25:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 514 states. [2020-10-24 02:25:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 541 transitions. [2020-10-24 02:25:30,379 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 541 transitions. Word has length 257 [2020-10-24 02:25:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:30,379 INFO L481 AbstractCegarLoop]: Abstraction has 514 states and 541 transitions. [2020-10-24 02:25:30,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-24 02:25:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 541 transitions. [2020-10-24 02:25:30,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-24 02:25:30,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:30,382 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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 02:25:30,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-24 02:25:30,383 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:30,383 INFO L82 PathProgramCache]: Analyzing trace with hash -700467756, now seen corresponding path program 8 times [2020-10-24 02:25:30,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:30,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119904680] [2020-10-24 02:25:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:30,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 79 proven. 169 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-24 02:25:31,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119904680] [2020-10-24 02:25:31,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:31,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-24 02:25:31,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982102352] [2020-10-24 02:25:31,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-24 02:25:31,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:31,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-24 02:25:31,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2020-10-24 02:25:31,071 INFO L87 Difference]: Start difference. First operand 514 states and 541 transitions. Second operand 31 states. [2020-10-24 02:25:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:33,723 INFO L93 Difference]: Finished difference Result 751 states and 794 transitions. [2020-10-24 02:25:33,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-24 02:25:33,724 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 257 [2020-10-24 02:25:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:33,728 INFO L225 Difference]: With dead ends: 751 [2020-10-24 02:25:33,728 INFO L226 Difference]: Without dead ends: 743 [2020-10-24 02:25:33,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=920, Invalid=4192, Unknown=0, NotChecked=0, Total=5112 [2020-10-24 02:25:33,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2020-10-24 02:25:33,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 627. [2020-10-24 02:25:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2020-10-24 02:25:33,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 663 transitions. [2020-10-24 02:25:33,914 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 663 transitions. Word has length 257 [2020-10-24 02:25:33,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:33,914 INFO L481 AbstractCegarLoop]: Abstraction has 627 states and 663 transitions. [2020-10-24 02:25:33,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-24 02:25:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 663 transitions. [2020-10-24 02:25:33,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-24 02:25:33,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:33,917 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:25:33,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-24 02:25:33,918 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:33,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:33,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1356025908, now seen corresponding path program 9 times [2020-10-24 02:25:33,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:33,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156465673] [2020-10-24 02:25:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:33,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:34,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 153 proven. 174 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-24 02:25:34,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156465673] [2020-10-24 02:25:34,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:34,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-24 02:25:34,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568621296] [2020-10-24 02:25:34,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-24 02:25:34,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:34,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-24 02:25:34,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2020-10-24 02:25:34,570 INFO L87 Difference]: Start difference. First operand 627 states and 663 transitions. Second operand 30 states. [2020-10-24 02:25:37,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:37,567 INFO L93 Difference]: Finished difference Result 935 states and 987 transitions. [2020-10-24 02:25:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-24 02:25:37,568 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 263 [2020-10-24 02:25:37,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:37,571 INFO L225 Difference]: With dead ends: 935 [2020-10-24 02:25:37,571 INFO L226 Difference]: Without dead ends: 533 [2020-10-24 02:25:37,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=970, Invalid=5510, Unknown=0, NotChecked=0, Total=6480 [2020-10-24 02:25:37,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2020-10-24 02:25:37,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2020-10-24 02:25:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 533 states. [2020-10-24 02:25:37,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 563 transitions. [2020-10-24 02:25:37,707 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 563 transitions. Word has length 263 [2020-10-24 02:25:37,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:37,707 INFO L481 AbstractCegarLoop]: Abstraction has 533 states and 563 transitions. [2020-10-24 02:25:37,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-24 02:25:37,707 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 563 transitions. [2020-10-24 02:25:37,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-24 02:25:37,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:37,710 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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 02:25:37,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-24 02:25:37,710 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:37,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:37,710 INFO L82 PathProgramCache]: Analyzing trace with hash -755050188, now seen corresponding path program 10 times [2020-10-24 02:25:37,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:37,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327622549] [2020-10-24 02:25:37,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:37,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:38,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:38,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:38,439 INFO L134 CoverageAnalysis]: Checked inductivity of 578 backedges. 153 proven. 200 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-24 02:25:38,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327622549] [2020-10-24 02:25:38,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:38,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-24 02:25:38,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536213457] [2020-10-24 02:25:38,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-24 02:25:38,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:38,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-24 02:25:38,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2020-10-24 02:25:38,441 INFO L87 Difference]: Start difference. First operand 533 states and 563 transitions. Second operand 32 states. [2020-10-24 02:25:42,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:42,504 INFO L93 Difference]: Finished difference Result 889 states and 938 transitions. [2020-10-24 02:25:42,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-24 02:25:42,505 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 269 [2020-10-24 02:25:42,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:42,507 INFO L225 Difference]: With dead ends: 889 [2020-10-24 02:25:42,507 INFO L226 Difference]: Without dead ends: 321 [2020-10-24 02:25:42,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2603 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1404, Invalid=7908, Unknown=0, NotChecked=0, Total=9312 [2020-10-24 02:25:42,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-24 02:25:42,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 318. [2020-10-24 02:25:42,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-10-24 02:25:42,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 332 transitions. [2020-10-24 02:25:42,588 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 332 transitions. Word has length 269 [2020-10-24 02:25:42,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:42,589 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 332 transitions. [2020-10-24 02:25:42,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-24 02:25:42,589 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 332 transitions. [2020-10-24 02:25:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2020-10-24 02:25:42,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:42,591 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 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 02:25:42,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-24 02:25:42,591 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:42,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:42,592 INFO L82 PathProgramCache]: Analyzing trace with hash 2102832284, now seen corresponding path program 11 times [2020-10-24 02:25:42,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:42,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106977998] [2020-10-24 02:25:42,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:42,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:43,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 190 proven. 123 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-24 02:25:43,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106977998] [2020-10-24 02:25:43,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:43,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-24 02:25:43,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626316481] [2020-10-24 02:25:43,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-24 02:25:43,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:43,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-24 02:25:43,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2020-10-24 02:25:43,190 INFO L87 Difference]: Start difference. First operand 318 states and 332 transitions. Second operand 29 states. [2020-10-24 02:25:45,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:45,547 INFO L93 Difference]: Finished difference Result 813 states and 861 transitions. [2020-10-24 02:25:45,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-24 02:25:45,548 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 269 [2020-10-24 02:25:45,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:45,551 INFO L225 Difference]: With dead ends: 813 [2020-10-24 02:25:45,551 INFO L226 Difference]: Without dead ends: 670 [2020-10-24 02:25:45,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=801, Invalid=4029, Unknown=0, NotChecked=0, Total=4830 [2020-10-24 02:25:45,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-10-24 02:25:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 404. [2020-10-24 02:25:45,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-10-24 02:25:45,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 424 transitions. [2020-10-24 02:25:45,669 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 424 transitions. Word has length 269 [2020-10-24 02:25:45,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:45,669 INFO L481 AbstractCegarLoop]: Abstraction has 404 states and 424 transitions. [2020-10-24 02:25:45,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-24 02:25:45,670 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 424 transitions. [2020-10-24 02:25:45,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-10-24 02:25:45,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:45,672 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 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 02:25:45,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-24 02:25:45,672 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:45,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1487808516, now seen corresponding path program 12 times [2020-10-24 02:25:45,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:45,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769158182] [2020-10-24 02:25:45,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:46,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 108 proven. 134 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-10-24 02:25:46,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769158182] [2020-10-24 02:25:46,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:46,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-24 02:25:46,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741307723] [2020-10-24 02:25:46,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-24 02:25:46,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:46,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-24 02:25:46,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2020-10-24 02:25:46,416 INFO L87 Difference]: Start difference. First operand 404 states and 424 transitions. Second operand 31 states. [2020-10-24 02:25:48,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:48,762 INFO L93 Difference]: Finished difference Result 687 states and 728 transitions. [2020-10-24 02:25:48,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-24 02:25:48,763 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 275 [2020-10-24 02:25:48,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:48,766 INFO L225 Difference]: With dead ends: 687 [2020-10-24 02:25:48,766 INFO L226 Difference]: Without dead ends: 546 [2020-10-24 02:25:48,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1198, Invalid=4964, Unknown=0, NotChecked=0, Total=6162 [2020-10-24 02:25:48,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-10-24 02:25:48,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 410. [2020-10-24 02:25:48,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 410 states. [2020-10-24 02:25:48,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 430 transitions. [2020-10-24 02:25:48,873 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 430 transitions. Word has length 275 [2020-10-24 02:25:48,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:48,873 INFO L481 AbstractCegarLoop]: Abstraction has 410 states and 430 transitions. [2020-10-24 02:25:48,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-24 02:25:48,874 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 430 transitions. [2020-10-24 02:25:48,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-24 02:25:48,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:48,876 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 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 02:25:48,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-24 02:25:48,876 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:48,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:48,877 INFO L82 PathProgramCache]: Analyzing trace with hash 336152420, now seen corresponding path program 13 times [2020-10-24 02:25:48,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:48,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11096740] [2020-10-24 02:25:48,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:49,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:49,678 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 202 proven. 188 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2020-10-24 02:25:49,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11096740] [2020-10-24 02:25:49,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:49,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-24 02:25:49,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948768488] [2020-10-24 02:25:49,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-24 02:25:49,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:49,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-24 02:25:49,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 02:25:49,681 INFO L87 Difference]: Start difference. First operand 410 states and 430 transitions. Second operand 33 states. [2020-10-24 02:25:53,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:53,933 INFO L93 Difference]: Finished difference Result 955 states and 1011 transitions. [2020-10-24 02:25:53,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-24 02:25:53,934 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 281 [2020-10-24 02:25:53,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:53,938 INFO L225 Difference]: With dead ends: 955 [2020-10-24 02:25:53,938 INFO L226 Difference]: Without dead ends: 812 [2020-10-24 02:25:53,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1470, Invalid=8630, Unknown=0, NotChecked=0, Total=10100 [2020-10-24 02:25:53,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2020-10-24 02:25:54,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 458. [2020-10-24 02:25:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 458 states. [2020-10-24 02:25:54,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 481 transitions. [2020-10-24 02:25:54,080 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 481 transitions. Word has length 281 [2020-10-24 02:25:54,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:54,080 INFO L481 AbstractCegarLoop]: Abstraction has 458 states and 481 transitions. [2020-10-24 02:25:54,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-24 02:25:54,081 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 481 transitions. [2020-10-24 02:25:54,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-10-24 02:25:54,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:54,083 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 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 02:25:54,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-24 02:25:54,083 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:54,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:54,084 INFO L82 PathProgramCache]: Analyzing trace with hash -2052836660, now seen corresponding path program 14 times [2020-10-24 02:25:54,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:54,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938294928] [2020-10-24 02:25:54,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:54,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:54,940 INFO L134 CoverageAnalysis]: Checked inductivity of 641 backedges. 112 proven. 239 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-10-24 02:25:54,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938294928] [2020-10-24 02:25:54,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:54,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-24 02:25:54,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361720033] [2020-10-24 02:25:54,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-24 02:25:54,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:54,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-24 02:25:54,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 02:25:54,943 INFO L87 Difference]: Start difference. First operand 458 states and 481 transitions. Second operand 35 states. [2020-10-24 02:25:57,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:25:57,899 INFO L93 Difference]: Finished difference Result 620 states and 653 transitions. [2020-10-24 02:25:57,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-24 02:25:57,900 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 281 [2020-10-24 02:25:57,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:25:57,905 INFO L225 Difference]: With dead ends: 620 [2020-10-24 02:25:57,905 INFO L226 Difference]: Without dead ends: 612 [2020-10-24 02:25:57,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1174, Invalid=5306, Unknown=0, NotChecked=0, Total=6480 [2020-10-24 02:25:57,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2020-10-24 02:25:58,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 583. [2020-10-24 02:25:58,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 583 states. [2020-10-24 02:25:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 616 transitions. [2020-10-24 02:25:58,092 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 616 transitions. Word has length 281 [2020-10-24 02:25:58,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:25:58,093 INFO L481 AbstractCegarLoop]: Abstraction has 583 states and 616 transitions. [2020-10-24 02:25:58,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-24 02:25:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 616 transitions. [2020-10-24 02:25:58,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-24 02:25:58,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:25:58,096 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 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, 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 02:25:58,096 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-24 02:25:58,096 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:25:58,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:25:58,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1476523564, now seen corresponding path program 15 times [2020-10-24 02:25:58,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:25:58,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628734991] [2020-10-24 02:25:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:25:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:58,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:25:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:25:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 214 proven. 260 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2020-10-24 02:25:59,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628734991] [2020-10-24 02:25:59,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:25:59,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-24 02:25:59,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354760215] [2020-10-24 02:25:59,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-24 02:25:59,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:25:59,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-24 02:25:59,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2020-10-24 02:25:59,013 INFO L87 Difference]: Start difference. First operand 583 states and 616 transitions. Second operand 36 states. [2020-10-24 02:26:04,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:04,120 INFO L93 Difference]: Finished difference Result 1129 states and 1195 transitions. [2020-10-24 02:26:04,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-24 02:26:04,122 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 293 [2020-10-24 02:26:04,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:04,124 INFO L225 Difference]: With dead ends: 1129 [2020-10-24 02:26:04,124 INFO L226 Difference]: Without dead ends: 345 [2020-10-24 02:26:04,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3788 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1930, Invalid=11180, Unknown=0, NotChecked=0, Total=13110 [2020-10-24 02:26:04,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-24 02:26:04,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 342. [2020-10-24 02:26:04,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-24 02:26:04,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 357 transitions. [2020-10-24 02:26:04,202 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 357 transitions. Word has length 293 [2020-10-24 02:26:04,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:04,202 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 357 transitions. [2020-10-24 02:26:04,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-24 02:26:04,202 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 357 transitions. [2020-10-24 02:26:04,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-24 02:26:04,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:04,205 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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, 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 02:26:04,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-24 02:26:04,205 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:04,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:04,205 INFO L82 PathProgramCache]: Analyzing trace with hash -1127254636, now seen corresponding path program 16 times [2020-10-24 02:26:04,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:04,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792870007] [2020-10-24 02:26:04,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:04,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:04,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 263 proven. 165 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-10-24 02:26:04,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792870007] [2020-10-24 02:26:04,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:04,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-24 02:26:04,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102873773] [2020-10-24 02:26:04,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-24 02:26:05,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:05,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-24 02:26:05,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 02:26:05,000 INFO L87 Difference]: Start difference. First operand 342 states and 357 transitions. Second operand 33 states. [2020-10-24 02:26:08,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:08,195 INFO L93 Difference]: Finished difference Result 947 states and 1004 transitions. [2020-10-24 02:26:08,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-24 02:26:08,196 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 293 [2020-10-24 02:26:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:08,200 INFO L225 Difference]: With dead ends: 947 [2020-10-24 02:26:08,200 INFO L226 Difference]: Without dead ends: 783 [2020-10-24 02:26:08,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1085, Invalid=5557, Unknown=0, NotChecked=0, Total=6642 [2020-10-24 02:26:08,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2020-10-24 02:26:08,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 450. [2020-10-24 02:26:08,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-24 02:26:08,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 472 transitions. [2020-10-24 02:26:08,306 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 472 transitions. Word has length 293 [2020-10-24 02:26:08,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:08,306 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 472 transitions. [2020-10-24 02:26:08,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-24 02:26:08,307 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 472 transitions. [2020-10-24 02:26:08,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-24 02:26:08,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:08,309 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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, 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 02:26:08,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-24 02:26:08,309 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:08,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:08,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1413138180, now seen corresponding path program 17 times [2020-10-24 02:26:08,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:08,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914009107] [2020-10-24 02:26:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:09,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 762 backedges. 147 proven. 177 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2020-10-24 02:26:09,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914009107] [2020-10-24 02:26:09,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:09,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-24 02:26:09,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115401445] [2020-10-24 02:26:09,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-24 02:26:09,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:09,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-24 02:26:09,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2020-10-24 02:26:09,202 INFO L87 Difference]: Start difference. First operand 450 states and 472 transitions. Second operand 35 states. [2020-10-24 02:26:12,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:12,140 INFO L93 Difference]: Finished difference Result 761 states and 807 transitions. [2020-10-24 02:26:12,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-24 02:26:12,141 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 299 [2020-10-24 02:26:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:12,146 INFO L225 Difference]: With dead ends: 761 [2020-10-24 02:26:12,146 INFO L226 Difference]: Without dead ends: 608 [2020-10-24 02:26:12,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1588, Invalid=6602, Unknown=0, NotChecked=0, Total=8190 [2020-10-24 02:26:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2020-10-24 02:26:12,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 456. [2020-10-24 02:26:12,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-10-24 02:26:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 478 transitions. [2020-10-24 02:26:12,263 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 478 transitions. Word has length 299 [2020-10-24 02:26:12,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:12,263 INFO L481 AbstractCegarLoop]: Abstraction has 456 states and 478 transitions. [2020-10-24 02:26:12,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-24 02:26:12,263 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 478 transitions. [2020-10-24 02:26:12,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-24 02:26:12,265 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:12,265 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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, 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 02:26:12,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-24 02:26:12,266 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:12,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:12,266 INFO L82 PathProgramCache]: Analyzing trace with hash -122921892, now seen corresponding path program 18 times [2020-10-24 02:26:12,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:12,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298277639] [2020-10-24 02:26:12,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:13,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 807 backedges. 275 proven. 242 refuted. 0 times theorem prover too weak. 290 trivial. 0 not checked. [2020-10-24 02:26:13,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298277639] [2020-10-24 02:26:13,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:13,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-24 02:26:13,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687898398] [2020-10-24 02:26:13,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-24 02:26:13,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:13,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-24 02:26:13,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1167, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 02:26:13,192 INFO L87 Difference]: Start difference. First operand 456 states and 478 transitions. Second operand 37 states. [2020-10-24 02:26:18,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:18,694 INFO L93 Difference]: Finished difference Result 1128 states and 1196 transitions. [2020-10-24 02:26:18,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-24 02:26:18,695 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 305 [2020-10-24 02:26:18,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:18,699 INFO L225 Difference]: With dead ends: 1128 [2020-10-24 02:26:18,700 INFO L226 Difference]: Without dead ends: 964 [2020-10-24 02:26:18,701 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3924 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1949, Invalid=11623, Unknown=0, NotChecked=0, Total=13572 [2020-10-24 02:26:18,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2020-10-24 02:26:18,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 508. [2020-10-24 02:26:18,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 508 states. [2020-10-24 02:26:18,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 534 transitions. [2020-10-24 02:26:18,850 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 534 transitions. Word has length 305 [2020-10-24 02:26:18,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:18,851 INFO L481 AbstractCegarLoop]: Abstraction has 508 states and 534 transitions. [2020-10-24 02:26:18,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-24 02:26:18,851 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 534 transitions. [2020-10-24 02:26:18,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-24 02:26:18,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:18,853 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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, 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 02:26:18,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-24 02:26:18,853 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:18,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:18,854 INFO L82 PathProgramCache]: Analyzing trace with hash 756216772, now seen corresponding path program 19 times [2020-10-24 02:26:18,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:18,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238884874] [2020-10-24 02:26:18,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:19,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 151 proven. 321 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-10-24 02:26:20,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238884874] [2020-10-24 02:26:20,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:20,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-24 02:26:20,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674989514] [2020-10-24 02:26:20,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-24 02:26:20,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:20,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-24 02:26:20,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1307, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 02:26:20,104 INFO L87 Difference]: Start difference. First operand 508 states and 534 transitions. Second operand 39 states. [2020-10-24 02:26:23,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:23,716 INFO L93 Difference]: Finished difference Result 698 states and 736 transitions. [2020-10-24 02:26:23,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-24 02:26:23,717 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 305 [2020-10-24 02:26:23,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:23,721 INFO L225 Difference]: With dead ends: 698 [2020-10-24 02:26:23,721 INFO L226 Difference]: Without dead ends: 690 [2020-10-24 02:26:23,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1834 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1497, Invalid=6693, Unknown=0, NotChecked=0, Total=8190 [2020-10-24 02:26:23,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2020-10-24 02:26:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 657. [2020-10-24 02:26:23,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 657 states. [2020-10-24 02:26:23,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 695 transitions. [2020-10-24 02:26:23,935 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 695 transitions. Word has length 305 [2020-10-24 02:26:23,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:23,935 INFO L481 AbstractCegarLoop]: Abstraction has 657 states and 695 transitions. [2020-10-24 02:26:23,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-24 02:26:23,936 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 695 transitions. [2020-10-24 02:26:23,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-24 02:26:23,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:23,951 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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, 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 02:26:23,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-24 02:26:23,951 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:23,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:23,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1488803620, now seen corresponding path program 20 times [2020-10-24 02:26:23,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:23,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568159747] [2020-10-24 02:26:23,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:23,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:25,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 908 backedges. 287 proven. 326 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2020-10-24 02:26:25,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568159747] [2020-10-24 02:26:25,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:25,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-24 02:26:25,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776283351] [2020-10-24 02:26:25,100 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-24 02:26:25,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:25,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-24 02:26:25,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=1385, Unknown=0, NotChecked=0, Total=1560 [2020-10-24 02:26:25,100 INFO L87 Difference]: Start difference. First operand 657 states and 695 transitions. Second operand 40 states. [2020-10-24 02:26:32,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:32,502 INFO L93 Difference]: Finished difference Result 1361 states and 1444 transitions. [2020-10-24 02:26:32,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-10-24 02:26:32,504 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 317 [2020-10-24 02:26:32,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:32,506 INFO L225 Difference]: With dead ends: 1361 [2020-10-24 02:26:32,506 INFO L226 Difference]: Without dead ends: 369 [2020-10-24 02:26:32,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5197 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2537, Invalid=15019, Unknown=0, NotChecked=0, Total=17556 [2020-10-24 02:26:32,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-24 02:26:32,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 366. [2020-10-24 02:26:32,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 366 states. [2020-10-24 02:26:32,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 382 transitions. [2020-10-24 02:26:32,623 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 382 transitions. Word has length 317 [2020-10-24 02:26:32,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:32,623 INFO L481 AbstractCegarLoop]: Abstraction has 366 states and 382 transitions. [2020-10-24 02:26:32,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-24 02:26:32,624 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 382 transitions. [2020-10-24 02:26:32,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-24 02:26:32,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:32,626 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 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, 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 02:26:32,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-24 02:26:32,626 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:32,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:32,626 INFO L82 PathProgramCache]: Analyzing trace with hash 51151500, now seen corresponding path program 21 times [2020-10-24 02:26:32,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:32,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2145540440] [2020-10-24 02:26:32,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:32,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:33,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:33,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 348 proven. 213 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-10-24 02:26:33,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2145540440] [2020-10-24 02:26:33,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:33,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-24 02:26:33,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008266491] [2020-10-24 02:26:33,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-24 02:26:33,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:33,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-24 02:26:33,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2020-10-24 02:26:33,599 INFO L87 Difference]: Start difference. First operand 366 states and 382 transitions. Second operand 37 states. [2020-10-24 02:26:37,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:37,763 INFO L93 Difference]: Finished difference Result 1093 states and 1160 transitions. [2020-10-24 02:26:37,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-24 02:26:37,764 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 317 [2020-10-24 02:26:37,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:37,769 INFO L225 Difference]: With dead ends: 1093 [2020-10-24 02:26:37,769 INFO L226 Difference]: Without dead ends: 908 [2020-10-24 02:26:37,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1412, Invalid=7330, Unknown=0, NotChecked=0, Total=8742 [2020-10-24 02:26:37,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2020-10-24 02:26:37,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 500. [2020-10-24 02:26:37,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 500 states. [2020-10-24 02:26:37,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 500 states to 500 states and 525 transitions. [2020-10-24 02:26:37,919 INFO L78 Accepts]: Start accepts. Automaton has 500 states and 525 transitions. Word has length 317 [2020-10-24 02:26:37,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:37,919 INFO L481 AbstractCegarLoop]: Abstraction has 500 states and 525 transitions. [2020-10-24 02:26:37,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-24 02:26:37,919 INFO L276 IsEmpty]: Start isEmpty. Operand 500 states and 525 transitions. [2020-10-24 02:26:37,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-24 02:26:37,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:37,921 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 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, 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 02:26:37,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-24 02:26:37,921 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:37,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:37,922 INFO L82 PathProgramCache]: Analyzing trace with hash 558403060, now seen corresponding path program 22 times [2020-10-24 02:26:37,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:37,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041180226] [2020-10-24 02:26:37,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:38,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:39,001 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 192 proven. 226 refuted. 0 times theorem prover too weak. 527 trivial. 0 not checked. [2020-10-24 02:26:39,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041180226] [2020-10-24 02:26:39,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:39,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-24 02:26:39,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115609122] [2020-10-24 02:26:39,002 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-24 02:26:39,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:39,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-24 02:26:39,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2020-10-24 02:26:39,002 INFO L87 Difference]: Start difference. First operand 500 states and 525 transitions. Second operand 39 states. [2020-10-24 02:26:42,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:42,675 INFO L93 Difference]: Finished difference Result 835 states and 886 transitions. [2020-10-24 02:26:42,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-24 02:26:42,676 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 323 [2020-10-24 02:26:42,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:42,680 INFO L225 Difference]: With dead ends: 835 [2020-10-24 02:26:42,681 INFO L226 Difference]: Without dead ends: 670 [2020-10-24 02:26:42,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2968 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2033, Invalid=8473, Unknown=0, NotChecked=0, Total=10506 [2020-10-24 02:26:42,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2020-10-24 02:26:42,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 506. [2020-10-24 02:26:42,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-10-24 02:26:42,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 531 transitions. [2020-10-24 02:26:42,867 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 531 transitions. Word has length 323 [2020-10-24 02:26:42,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:42,868 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 531 transitions. [2020-10-24 02:26:42,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-24 02:26:42,868 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 531 transitions. [2020-10-24 02:26:42,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-24 02:26:42,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:42,870 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 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, 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 02:26:42,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-24 02:26:42,870 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:42,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:42,871 INFO L82 PathProgramCache]: Analyzing trace with hash 802010452, now seen corresponding path program 23 times [2020-10-24 02:26:42,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:42,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128743548] [2020-10-24 02:26:42,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:44,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:44,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 360 proven. 302 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2020-10-24 02:26:44,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128743548] [2020-10-24 02:26:44,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:44,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-24 02:26:44,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832952512] [2020-10-24 02:26:44,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-24 02:26:44,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:44,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-24 02:26:44,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 02:26:44,110 INFO L87 Difference]: Start difference. First operand 506 states and 531 transitions. Second operand 41 states. [2020-10-24 02:26:51,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:51,119 INFO L93 Difference]: Finished difference Result 1313 states and 1394 transitions. [2020-10-24 02:26:51,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-10-24 02:26:51,120 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 329 [2020-10-24 02:26:51,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:51,125 INFO L225 Difference]: With dead ends: 1313 [2020-10-24 02:26:51,125 INFO L226 Difference]: Without dead ends: 1128 [2020-10-24 02:26:51,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5169 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2496, Invalid=15060, Unknown=0, NotChecked=0, Total=17556 [2020-10-24 02:26:51,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1128 states. [2020-10-24 02:26:51,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1128 to 566. [2020-10-24 02:26:51,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2020-10-24 02:26:51,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 595 transitions. [2020-10-24 02:26:51,345 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 595 transitions. Word has length 329 [2020-10-24 02:26:51,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:51,345 INFO L481 AbstractCegarLoop]: Abstraction has 566 states and 595 transitions. [2020-10-24 02:26:51,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-24 02:26:51,346 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 595 transitions. [2020-10-24 02:26:51,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-24 02:26:51,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:51,347 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 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, 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 02:26:51,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-24 02:26:51,347 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:51,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:51,348 INFO L82 PathProgramCache]: Analyzing trace with hash 109836476, now seen corresponding path program 24 times [2020-10-24 02:26:51,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:51,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297646813] [2020-10-24 02:26:51,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:52,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:52,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:52,711 INFO L134 CoverageAnalysis]: Checked inductivity of 995 backedges. 196 proven. 415 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-10-24 02:26:52,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297646813] [2020-10-24 02:26:52,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:52,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-24 02:26:52,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135117975] [2020-10-24 02:26:52,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-24 02:26:52,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:52,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-24 02:26:52,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2020-10-24 02:26:52,713 INFO L87 Difference]: Start difference. First operand 566 states and 595 transitions. Second operand 43 states. [2020-10-24 02:26:57,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:26:57,342 INFO L93 Difference]: Finished difference Result 776 states and 819 transitions. [2020-10-24 02:26:57,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-24 02:26:57,346 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 329 [2020-10-24 02:26:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:26:57,350 INFO L225 Difference]: With dead ends: 776 [2020-10-24 02:26:57,350 INFO L226 Difference]: Without dead ends: 768 [2020-10-24 02:26:57,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1860, Invalid=8240, Unknown=0, NotChecked=0, Total=10100 [2020-10-24 02:26:57,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-10-24 02:26:57,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 731. [2020-10-24 02:26:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-10-24 02:26:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 774 transitions. [2020-10-24 02:26:57,666 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 774 transitions. Word has length 329 [2020-10-24 02:26:57,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:26:57,666 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 774 transitions. [2020-10-24 02:26:57,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-24 02:26:57,666 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 774 transitions. [2020-10-24 02:26:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-24 02:26:57,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:26:57,669 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 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, 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 02:26:57,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-24 02:26:57,669 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:26:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:26:57,670 INFO L82 PathProgramCache]: Analyzing trace with hash 816905244, now seen corresponding path program 25 times [2020-10-24 02:26:57,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:26:57,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638889629] [2020-10-24 02:26:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:26:57,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:59,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:26:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:26:59,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1109 backedges. 372 proven. 398 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2020-10-24 02:26:59,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638889629] [2020-10-24 02:26:59,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:26:59,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-24 02:26:59,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138936792] [2020-10-24 02:26:59,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-24 02:26:59,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:26:59,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-24 02:26:59,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=1681, Unknown=0, NotChecked=0, Total=1892 [2020-10-24 02:26:59,119 INFO L87 Difference]: Start difference. First operand 731 states and 774 transitions. Second operand 44 states. [2020-10-24 02:27:07,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:07,779 INFO L93 Difference]: Finished difference Result 1605 states and 1706 transitions. [2020-10-24 02:27:07,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-10-24 02:27:07,780 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 341 [2020-10-24 02:27:07,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:07,784 INFO L225 Difference]: With dead ends: 1605 [2020-10-24 02:27:07,784 INFO L226 Difference]: Without dead ends: 393 [2020-10-24 02:27:07,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6830 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=3225, Invalid=19425, Unknown=0, NotChecked=0, Total=22650 [2020-10-24 02:27:07,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2020-10-24 02:27:07,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 390. [2020-10-24 02:27:07,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 390 states. [2020-10-24 02:27:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 407 transitions. [2020-10-24 02:27:07,902 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 407 transitions. Word has length 341 [2020-10-24 02:27:07,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:07,903 INFO L481 AbstractCegarLoop]: Abstraction has 390 states and 407 transitions. [2020-10-24 02:27:07,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-24 02:27:07,903 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 407 transitions. [2020-10-24 02:27:07,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-10-24 02:27:07,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:07,904 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 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, 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 02:27:07,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-24 02:27:07,905 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:07,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:07,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1978805372, now seen corresponding path program 26 times [2020-10-24 02:27:07,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:07,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137684256] [2020-10-24 02:27:07,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:07,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:09,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:09,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:09,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1096 backedges. 445 proven. 267 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-10-24 02:27:09,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137684256] [2020-10-24 02:27:09,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:09,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-24 02:27:09,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447247468] [2020-10-24 02:27:09,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-24 02:27:09,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:09,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-24 02:27:09,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 02:27:09,204 INFO L87 Difference]: Start difference. First operand 390 states and 407 transitions. Second operand 41 states. [2020-10-24 02:27:14,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:14,459 INFO L93 Difference]: Finished difference Result 1251 states and 1329 transitions. [2020-10-24 02:27:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-24 02:27:14,460 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 341 [2020-10-24 02:27:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:14,464 INFO L225 Difference]: With dead ends: 1251 [2020-10-24 02:27:14,465 INFO L226 Difference]: Without dead ends: 1045 [2020-10-24 02:27:14,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2831 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1782, Invalid=9348, Unknown=0, NotChecked=0, Total=11130 [2020-10-24 02:27:14,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2020-10-24 02:27:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 550. [2020-10-24 02:27:14,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 550 states. [2020-10-24 02:27:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 578 transitions. [2020-10-24 02:27:14,661 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 578 transitions. Word has length 341 [2020-10-24 02:27:14,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:14,662 INFO L481 AbstractCegarLoop]: Abstraction has 550 states and 578 transitions. [2020-10-24 02:27:14,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-24 02:27:14,662 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 578 transitions. [2020-10-24 02:27:14,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-10-24 02:27:14,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:14,664 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 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, 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 02:27:14,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-24 02:27:14,664 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:14,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:14,665 INFO L82 PathProgramCache]: Analyzing trace with hash 2067277548, now seen corresponding path program 27 times [2020-10-24 02:27:14,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:14,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861495308] [2020-10-24 02:27:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:15,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:15,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:15,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1152 backedges. 243 proven. 281 refuted. 0 times theorem prover too weak. 628 trivial. 0 not checked. [2020-10-24 02:27:15,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861495308] [2020-10-24 02:27:15,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:15,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-24 02:27:15,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459909470] [2020-10-24 02:27:15,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-24 02:27:15,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:15,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-24 02:27:15,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1541, Unknown=0, NotChecked=0, Total=1806 [2020-10-24 02:27:15,989 INFO L87 Difference]: Start difference. First operand 550 states and 578 transitions. Second operand 43 states. [2020-10-24 02:27:20,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:20,486 INFO L93 Difference]: Finished difference Result 909 states and 965 transitions. [2020-10-24 02:27:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-24 02:27:20,487 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 347 [2020-10-24 02:27:20,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:20,491 INFO L225 Difference]: With dead ends: 909 [2020-10-24 02:27:20,491 INFO L226 Difference]: Without dead ends: 732 [2020-10-24 02:27:20,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3774 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2533, Invalid=10577, Unknown=0, NotChecked=0, Total=13110 [2020-10-24 02:27:20,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2020-10-24 02:27:20,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 556. [2020-10-24 02:27:20,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2020-10-24 02:27:20,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 584 transitions. [2020-10-24 02:27:20,686 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 584 transitions. Word has length 347 [2020-10-24 02:27:20,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:20,687 INFO L481 AbstractCegarLoop]: Abstraction has 556 states and 584 transitions. [2020-10-24 02:27:20,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-24 02:27:20,687 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 584 transitions. [2020-10-24 02:27:20,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-24 02:27:20,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:20,689 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 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, 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 02:27:20,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-24 02:27:20,690 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:20,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:20,690 INFO L82 PathProgramCache]: Analyzing trace with hash -210939316, now seen corresponding path program 28 times [2020-10-24 02:27:20,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:20,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084690064] [2020-10-24 02:27:20,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:22,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:22,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 457 proven. 368 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-10-24 02:27:22,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084690064] [2020-10-24 02:27:22,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:22,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-24 02:27:22,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466626878] [2020-10-24 02:27:22,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-24 02:27:22,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:22,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-24 02:27:22,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1739, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 02:27:22,256 INFO L87 Difference]: Start difference. First operand 556 states and 584 transitions. Second operand 45 states. [2020-10-24 02:27:31,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:31,105 INFO L93 Difference]: Finished difference Result 1510 states and 1605 transitions. [2020-10-24 02:27:31,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2020-10-24 02:27:31,110 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 353 [2020-10-24 02:27:31,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:31,115 INFO L225 Difference]: With dead ends: 1510 [2020-10-24 02:27:31,115 INFO L226 Difference]: Without dead ends: 1304 [2020-10-24 02:27:31,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6586 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=3111, Invalid=18941, Unknown=0, NotChecked=0, Total=22052 [2020-10-24 02:27:31,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2020-10-24 02:27:31,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 628. [2020-10-24 02:27:31,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 628 states. [2020-10-24 02:27:31,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 628 states to 628 states and 661 transitions. [2020-10-24 02:27:31,420 INFO L78 Accepts]: Start accepts. Automaton has 628 states and 661 transitions. Word has length 353 [2020-10-24 02:27:31,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:31,420 INFO L481 AbstractCegarLoop]: Abstraction has 628 states and 661 transitions. [2020-10-24 02:27:31,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-24 02:27:31,421 INFO L276 IsEmpty]: Start isEmpty. Operand 628 states and 661 transitions. [2020-10-24 02:27:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-10-24 02:27:31,423 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:31,423 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 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, 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 02:27:31,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-24 02:27:31,423 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:31,424 INFO L82 PathProgramCache]: Analyzing trace with hash 177160628, now seen corresponding path program 29 times [2020-10-24 02:27:31,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:31,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762277121] [2020-10-24 02:27:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:31,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:32,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:33,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1208 backedges. 247 proven. 521 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-10-24 02:27:33,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762277121] [2020-10-24 02:27:33,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:33,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-24 02:27:33,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378728215] [2020-10-24 02:27:33,041 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-24 02:27:33,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:33,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-24 02:27:33,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=1907, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 02:27:33,042 INFO L87 Difference]: Start difference. First operand 628 states and 661 transitions. Second operand 47 states. [2020-10-24 02:27:38,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:38,113 INFO L93 Difference]: Finished difference Result 854 states and 902 transitions. [2020-10-24 02:27:38,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-24 02:27:38,114 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 353 [2020-10-24 02:27:38,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:38,118 INFO L225 Difference]: With dead ends: 854 [2020-10-24 02:27:38,118 INFO L226 Difference]: Without dead ends: 846 [2020-10-24 02:27:38,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2263, Invalid=9947, Unknown=0, NotChecked=0, Total=12210 [2020-10-24 02:27:38,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2020-10-24 02:27:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 805. [2020-10-24 02:27:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 805 states. [2020-10-24 02:27:38,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 853 transitions. [2020-10-24 02:27:38,527 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 853 transitions. Word has length 353 [2020-10-24 02:27:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:38,528 INFO L481 AbstractCegarLoop]: Abstraction has 805 states and 853 transitions. [2020-10-24 02:27:38,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-24 02:27:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 853 transitions. [2020-10-24 02:27:38,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-10-24 02:27:38,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:38,531 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 5, 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, 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 02:27:38,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-24 02:27:38,531 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:38,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:38,532 INFO L82 PathProgramCache]: Analyzing trace with hash 433906964, now seen corresponding path program 30 times [2020-10-24 02:27:38,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:38,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285198981] [2020-10-24 02:27:38,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:40,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 469 proven. 476 refuted. 0 times theorem prover too weak. 389 trivial. 0 not checked. [2020-10-24 02:27:40,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285198981] [2020-10-24 02:27:40,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:40,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-24 02:27:40,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275151178] [2020-10-24 02:27:40,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-24 02:27:40,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:40,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-24 02:27:40,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2005, Unknown=0, NotChecked=0, Total=2256 [2020-10-24 02:27:40,199 INFO L87 Difference]: Start difference. First operand 805 states and 853 transitions. Second operand 48 states. [2020-10-24 02:27:51,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:51,192 INFO L93 Difference]: Finished difference Result 1861 states and 1981 transitions. [2020-10-24 02:27:51,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-10-24 02:27:51,194 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 365 [2020-10-24 02:27:51,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:51,197 INFO L225 Difference]: With dead ends: 1861 [2020-10-24 02:27:51,197 INFO L226 Difference]: Without dead ends: 417 [2020-10-24 02:27:51,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8687 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=3994, Invalid=24398, Unknown=0, NotChecked=0, Total=28392 [2020-10-24 02:27:51,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-10-24 02:27:51,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 414. [2020-10-24 02:27:51,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-10-24 02:27:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 432 transitions. [2020-10-24 02:27:51,347 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 432 transitions. Word has length 365 [2020-10-24 02:27:51,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:27:51,347 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 432 transitions. [2020-10-24 02:27:51,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-24 02:27:51,348 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 432 transitions. [2020-10-24 02:27:51,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2020-10-24 02:27:51,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:27:51,350 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 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, 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 02:27:51,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-24 02:27:51,350 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:27:51,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:27:51,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1974245252, now seen corresponding path program 31 times [2020-10-24 02:27:51,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:27:51,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800341025] [2020-10-24 02:27:51,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:27:51,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:52,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:27:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:27:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1321 backedges. 554 proven. 327 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-10-24 02:27:52,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800341025] [2020-10-24 02:27:52,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:27:52,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-24 02:27:52,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651292210] [2020-10-24 02:27:52,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-24 02:27:52,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:27:52,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-24 02:27:52,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1709, Unknown=0, NotChecked=0, Total=1980 [2020-10-24 02:27:52,905 INFO L87 Difference]: Start difference. First operand 414 states and 432 transitions. Second operand 45 states. [2020-10-24 02:27:59,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:27:59,705 INFO L93 Difference]: Finished difference Result 1421 states and 1511 transitions. [2020-10-24 02:27:59,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-10-24 02:27:59,707 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 365 [2020-10-24 02:27:59,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:27:59,713 INFO L225 Difference]: With dead ends: 1421 [2020-10-24 02:27:59,713 INFO L226 Difference]: Without dead ends: 1194 [2020-10-24 02:27:59,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3561 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=2195, Invalid=11611, Unknown=0, NotChecked=0, Total=13806 [2020-10-24 02:27:59,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2020-10-24 02:28:00,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 600. [2020-10-24 02:28:00,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-10-24 02:28:00,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 631 transitions. [2020-10-24 02:28:00,005 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 631 transitions. Word has length 365 [2020-10-24 02:28:00,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:00,006 INFO L481 AbstractCegarLoop]: Abstraction has 600 states and 631 transitions. [2020-10-24 02:28:00,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-24 02:28:00,006 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 631 transitions. [2020-10-24 02:28:00,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2020-10-24 02:28:00,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:00,009 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 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, 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 02:28:00,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-24 02:28:00,009 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:00,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:00,010 INFO L82 PathProgramCache]: Analyzing trace with hash 2048132068, now seen corresponding path program 32 times [2020-10-24 02:28:00,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:00,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832431889] [2020-10-24 02:28:00,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:00,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:01,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1383 backedges. 300 proven. 342 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2020-10-24 02:28:01,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832431889] [2020-10-24 02:28:01,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:01,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-24 02:28:01,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188073388] [2020-10-24 02:28:01,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-24 02:28:01,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:01,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-24 02:28:01,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1849, Unknown=0, NotChecked=0, Total=2162 [2020-10-24 02:28:01,702 INFO L87 Difference]: Start difference. First operand 600 states and 631 transitions. Second operand 47 states. [2020-10-24 02:28:07,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:07,175 INFO L93 Difference]: Finished difference Result 983 states and 1044 transitions. [2020-10-24 02:28:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-10-24 02:28:07,176 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 371 [2020-10-24 02:28:07,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:07,179 INFO L225 Difference]: With dead ends: 983 [2020-10-24 02:28:07,179 INFO L226 Difference]: Without dead ends: 794 [2020-10-24 02:28:07,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4677 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3088, Invalid=12914, Unknown=0, NotChecked=0, Total=16002 [2020-10-24 02:28:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-10-24 02:28:07,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 606. [2020-10-24 02:28:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2020-10-24 02:28:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 637 transitions. [2020-10-24 02:28:07,425 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 637 transitions. Word has length 371 [2020-10-24 02:28:07,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:07,425 INFO L481 AbstractCegarLoop]: Abstraction has 606 states and 637 transitions. [2020-10-24 02:28:07,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-24 02:28:07,425 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 637 transitions. [2020-10-24 02:28:07,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-24 02:28:07,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:07,427 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 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, 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 02:28:07,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-24 02:28:07,427 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:07,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:07,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1140116668, now seen corresponding path program 33 times [2020-10-24 02:28:07,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:07,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106642023] [2020-10-24 02:28:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:09,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 566 proven. 440 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2020-10-24 02:28:09,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106642023] [2020-10-24 02:28:09,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:09,216 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-24 02:28:09,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518025857] [2020-10-24 02:28:09,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-24 02:28:09,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:09,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-24 02:28:09,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2067, Unknown=0, NotChecked=0, Total=2352 [2020-10-24 02:28:09,217 INFO L87 Difference]: Start difference. First operand 606 states and 637 transitions. Second operand 49 states. [2020-10-24 02:28:20,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:20,250 INFO L93 Difference]: Finished difference Result 1719 states and 1829 transitions. [2020-10-24 02:28:20,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-10-24 02:28:20,251 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 377 [2020-10-24 02:28:20,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:20,259 INFO L225 Difference]: With dead ends: 1719 [2020-10-24 02:28:20,259 INFO L226 Difference]: Without dead ends: 1492 [2020-10-24 02:28:20,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8175 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=3794, Invalid=23266, Unknown=0, NotChecked=0, Total=27060 [2020-10-24 02:28:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1492 states. [2020-10-24 02:28:20,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1492 to 690. [2020-10-24 02:28:20,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 690 states. [2020-10-24 02:28:20,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 727 transitions. [2020-10-24 02:28:20,624 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 727 transitions. Word has length 377 [2020-10-24 02:28:20,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:20,625 INFO L481 AbstractCegarLoop]: Abstraction has 690 states and 727 transitions. [2020-10-24 02:28:20,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-24 02:28:20,625 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 727 transitions. [2020-10-24 02:28:20,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-24 02:28:20,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:20,628 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 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, 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 02:28:20,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-24 02:28:20,628 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:20,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:20,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1877160276, now seen corresponding path program 34 times [2020-10-24 02:28:20,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:20,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062010886] [2020-10-24 02:28:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:22,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:22,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1445 backedges. 304 proven. 639 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2020-10-24 02:28:22,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062010886] [2020-10-24 02:28:22,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:22,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-24 02:28:22,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754962355] [2020-10-24 02:28:22,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-24 02:28:22,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:22,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-24 02:28:22,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=2249, Unknown=0, NotChecked=0, Total=2550 [2020-10-24 02:28:22,685 INFO L87 Difference]: Start difference. First operand 690 states and 727 transitions. Second operand 51 states. [2020-10-24 02:28:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:29,086 INFO L93 Difference]: Finished difference Result 932 states and 985 transitions. [2020-10-24 02:28:29,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-24 02:28:29,089 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 377 [2020-10-24 02:28:29,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:29,093 INFO L225 Difference]: With dead ends: 932 [2020-10-24 02:28:29,093 INFO L226 Difference]: Without dead ends: 924 [2020-10-24 02:28:29,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3367 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2706, Invalid=11814, Unknown=0, NotChecked=0, Total=14520 [2020-10-24 02:28:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2020-10-24 02:28:29,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 879. [2020-10-24 02:28:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 879 states. [2020-10-24 02:28:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 932 transitions. [2020-10-24 02:28:29,615 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 932 transitions. Word has length 377 [2020-10-24 02:28:29,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:29,616 INFO L481 AbstractCegarLoop]: Abstraction has 879 states and 932 transitions. [2020-10-24 02:28:29,616 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-24 02:28:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 932 transitions. [2020-10-24 02:28:29,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-10-24 02:28:29,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:29,618 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 5, 5, 5, 5, 5, 5, 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, 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 02:28:29,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-24 02:28:29,618 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:29,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:29,619 INFO L82 PathProgramCache]: Analyzing trace with hash -859762164, now seen corresponding path program 35 times [2020-10-24 02:28:29,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:29,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584917485] [2020-10-24 02:28:29,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:31,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:31,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1583 backedges. 578 proven. 560 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2020-10-24 02:28:31,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584917485] [2020-10-24 02:28:31,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:31,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-24 02:28:31,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263382913] [2020-10-24 02:28:31,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-24 02:28:31,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:31,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-24 02:28:31,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=2357, Unknown=0, NotChecked=0, Total=2652 [2020-10-24 02:28:31,697 INFO L87 Difference]: Start difference. First operand 879 states and 932 transitions. Second operand 52 states. [2020-10-24 02:28:44,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:44,243 INFO L93 Difference]: Finished difference Result 2129 states and 2269 transitions. [2020-10-24 02:28:44,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2020-10-24 02:28:44,245 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 389 [2020-10-24 02:28:44,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:44,248 INFO L225 Difference]: With dead ends: 2129 [2020-10-24 02:28:44,249 INFO L226 Difference]: Without dead ends: 441 [2020-10-24 02:28:44,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10768 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=4844, Invalid=29938, Unknown=0, NotChecked=0, Total=34782 [2020-10-24 02:28:44,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-10-24 02:28:44,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 438. [2020-10-24 02:28:44,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-10-24 02:28:44,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 457 transitions. [2020-10-24 02:28:44,415 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 457 transitions. Word has length 389 [2020-10-24 02:28:44,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:44,415 INFO L481 AbstractCegarLoop]: Abstraction has 438 states and 457 transitions. [2020-10-24 02:28:44,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-24 02:28:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 457 transitions. [2020-10-24 02:28:44,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2020-10-24 02:28:44,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:44,417 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 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, 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 02:28:44,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-24 02:28:44,418 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:44,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:44,418 INFO L82 PathProgramCache]: Analyzing trace with hash -623033996, now seen corresponding path program 36 times [2020-10-24 02:28:44,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:44,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994530040] [2020-10-24 02:28:44,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:46,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:46,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1570 backedges. 675 proven. 393 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2020-10-24 02:28:46,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994530040] [2020-10-24 02:28:46,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:46,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-24 02:28:46,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871264834] [2020-10-24 02:28:46,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-24 02:28:46,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:46,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-24 02:28:46,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2033, Unknown=0, NotChecked=0, Total=2352 [2020-10-24 02:28:46,539 INFO L87 Difference]: Start difference. First operand 438 states and 457 transitions. Second operand 49 states. [2020-10-24 02:28:54,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:54,185 INFO L93 Difference]: Finished difference Result 1603 states and 1706 transitions. [2020-10-24 02:28:54,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-10-24 02:28:54,187 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 389 [2020-10-24 02:28:54,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:54,191 INFO L225 Difference]: With dead ends: 1603 [2020-10-24 02:28:54,192 INFO L226 Difference]: Without dead ends: 1355 [2020-10-24 02:28:54,194 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4375 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2651, Invalid=14119, Unknown=0, NotChecked=0, Total=16770 [2020-10-24 02:28:54,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2020-10-24 02:28:54,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 650. [2020-10-24 02:28:54,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2020-10-24 02:28:54,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 684 transitions. [2020-10-24 02:28:54,513 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 684 transitions. Word has length 389 [2020-10-24 02:28:54,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:54,513 INFO L481 AbstractCegarLoop]: Abstraction has 650 states and 684 transitions. [2020-10-24 02:28:54,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-24 02:28:54,514 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 684 transitions. [2020-10-24 02:28:54,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2020-10-24 02:28:54,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:54,516 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 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, 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 02:28:54,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-24 02:28:54,516 INFO L429 AbstractCegarLoop]: === Iteration 64 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:54,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:54,516 INFO L82 PathProgramCache]: Analyzing trace with hash 2094802140, now seen corresponding path program 37 times [2020-10-24 02:28:54,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:54,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571973844] [2020-10-24 02:28:54,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:54,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:57,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:57,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:57,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 363 proven. 409 refuted. 0 times theorem prover too weak. 866 trivial. 0 not checked. [2020-10-24 02:28:57,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571973844] [2020-10-24 02:28:57,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:28:57,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-24 02:28:57,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039379684] [2020-10-24 02:28:57,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-24 02:28:57,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:57,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-24 02:28:57,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2020-10-24 02:28:57,124 INFO L87 Difference]: Start difference. First operand 650 states and 684 transitions. Second operand 51 states. [2020-10-24 02:29:04,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:04,906 INFO L93 Difference]: Finished difference Result 1057 states and 1123 transitions. [2020-10-24 02:29:04,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-10-24 02:29:04,907 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 395 [2020-10-24 02:29:04,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:04,910 INFO L225 Difference]: With dead ends: 1057 [2020-10-24 02:29:04,911 INFO L226 Difference]: Without dead ends: 856 [2020-10-24 02:29:04,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5677 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=3698, Invalid=15484, Unknown=0, NotChecked=0, Total=19182 [2020-10-24 02:29:04,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2020-10-24 02:29:05,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 656. [2020-10-24 02:29:05,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-10-24 02:29:05,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 690 transitions. [2020-10-24 02:29:05,234 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 690 transitions. Word has length 395 [2020-10-24 02:29:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:05,235 INFO L481 AbstractCegarLoop]: Abstraction has 656 states and 690 transitions. [2020-10-24 02:29:05,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-24 02:29:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 690 transitions. [2020-10-24 02:29:05,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-10-24 02:29:05,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:05,238 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 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, 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 02:29:05,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-24 02:29:05,238 INFO L429 AbstractCegarLoop]: === Iteration 65 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:05,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:05,238 INFO L82 PathProgramCache]: Analyzing trace with hash -525903812, now seen corresponding path program 38 times [2020-10-24 02:29:05,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:05,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936757166] [2020-10-24 02:29:05,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:08,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1707 backedges. 687 proven. 518 refuted. 0 times theorem prover too weak. 502 trivial. 0 not checked. [2020-10-24 02:29:08,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936757166] [2020-10-24 02:29:08,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:08,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-24 02:29:08,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411300181] [2020-10-24 02:29:08,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-24 02:29:08,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:08,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-24 02:29:08,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=2423, Unknown=0, NotChecked=0, Total=2756 [2020-10-24 02:29:08,162 INFO L87 Difference]: Start difference. First operand 656 states and 690 transitions. Second operand 53 states. [2020-10-24 02:29:23,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:23,630 INFO L93 Difference]: Finished difference Result 1940 states and 2066 transitions. [2020-10-24 02:29:23,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2020-10-24 02:29:23,633 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 401 [2020-10-24 02:29:23,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:23,636 INFO L225 Difference]: With dead ends: 1940 [2020-10-24 02:29:23,636 INFO L226 Difference]: Without dead ends: 1692 [2020-10-24 02:29:23,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9936 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=4545, Invalid=28035, Unknown=0, NotChecked=0, Total=32580 [2020-10-24 02:29:23,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2020-10-24 02:29:24,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 752. [2020-10-24 02:29:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 752 states. [2020-10-24 02:29:24,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 793 transitions. [2020-10-24 02:29:24,156 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 793 transitions. Word has length 401 [2020-10-24 02:29:24,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:24,157 INFO L481 AbstractCegarLoop]: Abstraction has 752 states and 793 transitions. [2020-10-24 02:29:24,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-24 02:29:24,157 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 793 transitions. [2020-10-24 02:29:24,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2020-10-24 02:29:24,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:24,161 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 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, 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 02:29:24,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-24 02:29:24,161 INFO L429 AbstractCegarLoop]: === Iteration 66 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:24,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:24,162 INFO L82 PathProgramCache]: Analyzing trace with hash -323706972, now seen corresponding path program 39 times [2020-10-24 02:29:24,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:24,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723378569] [2020-10-24 02:29:24,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:27,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1706 backedges. 367 proven. 769 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-10-24 02:29:27,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723378569] [2020-10-24 02:29:27,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:27,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-24 02:29:27,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444252222] [2020-10-24 02:29:27,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-24 02:29:27,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:27,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-24 02:29:27,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=2619, Unknown=0, NotChecked=0, Total=2970 [2020-10-24 02:29:27,163 INFO L87 Difference]: Start difference. First operand 752 states and 793 transitions. Second operand 55 states. [2020-10-24 02:29:36,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:36,296 INFO L93 Difference]: Finished difference Result 1010 states and 1068 transitions. [2020-10-24 02:29:36,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-24 02:29:36,299 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 401 [2020-10-24 02:29:36,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:36,302 INFO L225 Difference]: With dead ends: 1010 [2020-10-24 02:29:36,302 INFO L226 Difference]: Without dead ends: 1002 [2020-10-24 02:29:36,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3980 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=3189, Invalid=13841, Unknown=0, NotChecked=0, Total=17030 [2020-10-24 02:29:36,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-10-24 02:29:36,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 953. [2020-10-24 02:29:36,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 953 states. [2020-10-24 02:29:36,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 1011 transitions. [2020-10-24 02:29:36,992 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 1011 transitions. Word has length 401 [2020-10-24 02:29:36,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:36,992 INFO L481 AbstractCegarLoop]: Abstraction has 953 states and 1011 transitions. [2020-10-24 02:29:36,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-24 02:29:36,993 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 1011 transitions. [2020-10-24 02:29:36,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-10-24 02:29:36,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:36,995 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 5, 5, 5, 5, 5, 5, 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, 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 02:29:36,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-24 02:29:36,996 INFO L429 AbstractCegarLoop]: === Iteration 67 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:36,996 INFO L82 PathProgramCache]: Analyzing trace with hash 542999300, now seen corresponding path program 40 times [2020-10-24 02:29:36,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:36,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260393404] [2020-10-24 02:29:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:40,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1856 backedges. 699 proven. 650 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-24 02:29:40,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260393404] [2020-10-24 02:29:40,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:40,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-24 02:29:40,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553490967] [2020-10-24 02:29:40,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-24 02:29:40,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:40,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-24 02:29:40,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=2737, Unknown=0, NotChecked=0, Total=3080 [2020-10-24 02:29:40,296 INFO L87 Difference]: Start difference. First operand 953 states and 1011 transitions. Second operand 56 states. [2020-10-24 02:30:01,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:01,101 INFO L93 Difference]: Finished difference Result 2409 states and 2570 transitions. [2020-10-24 02:30:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2020-10-24 02:30:01,104 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 413 [2020-10-24 02:30:01,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:01,106 INFO L225 Difference]: With dead ends: 2409 [2020-10-24 02:30:01,107 INFO L226 Difference]: Without dead ends: 465 [2020-10-24 02:30:01,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13073 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=5775, Invalid=36045, Unknown=0, NotChecked=0, Total=41820 [2020-10-24 02:30:01,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2020-10-24 02:30:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 462. [2020-10-24 02:30:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2020-10-24 02:30:01,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 482 transitions. [2020-10-24 02:30:01,334 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 482 transitions. Word has length 413 [2020-10-24 02:30:01,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:01,335 INFO L481 AbstractCegarLoop]: Abstraction has 462 states and 482 transitions. [2020-10-24 02:30:01,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-24 02:30:01,335 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 482 transitions. [2020-10-24 02:30:01,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2020-10-24 02:30:01,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:01,337 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 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, 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 02:30:01,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-24 02:30:01,337 INFO L429 AbstractCegarLoop]: === Iteration 68 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:01,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:01,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1859428756, now seen corresponding path program 41 times [2020-10-24 02:30:01,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:01,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643542340] [2020-10-24 02:30:01,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:04,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:04,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:04,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1843 backedges. 808 proven. 465 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-10-24 02:30:04,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643542340] [2020-10-24 02:30:04,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:04,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-24 02:30:04,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889399606] [2020-10-24 02:30:04,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-24 02:30:04,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:04,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-24 02:30:04,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=2385, Unknown=0, NotChecked=0, Total=2756 [2020-10-24 02:30:04,235 INFO L87 Difference]: Start difference. First operand 462 states and 482 transitions. Second operand 53 states. [2020-10-24 02:30:16,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:16,051 INFO L93 Difference]: Finished difference Result 1797 states and 1914 transitions. [2020-10-24 02:30:16,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2020-10-24 02:30:16,053 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 413 [2020-10-24 02:30:16,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:16,056 INFO L225 Difference]: With dead ends: 1797 [2020-10-24 02:30:16,057 INFO L226 Difference]: Without dead ends: 1528 [2020-10-24 02:30:16,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5273 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=3150, Invalid=16872, Unknown=0, NotChecked=0, Total=20022 [2020-10-24 02:30:16,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2020-10-24 02:30:16,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 700. [2020-10-24 02:30:16,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2020-10-24 02:30:16,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 737 transitions. [2020-10-24 02:30:16,472 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 737 transitions. Word has length 413 [2020-10-24 02:30:16,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:16,472 INFO L481 AbstractCegarLoop]: Abstraction has 700 states and 737 transitions. [2020-10-24 02:30:16,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-24 02:30:16,472 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 737 transitions. [2020-10-24 02:30:16,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-10-24 02:30:16,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:16,475 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 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, 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 02:30:16,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-24 02:30:16,475 INFO L429 AbstractCegarLoop]: === Iteration 69 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:16,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:16,475 INFO L82 PathProgramCache]: Analyzing trace with hash 554731988, now seen corresponding path program 42 times [2020-10-24 02:30:16,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:16,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524076716] [2020-10-24 02:30:16,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:19,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1917 backedges. 432 proven. 482 refuted. 0 times theorem prover too weak. 1003 trivial. 0 not checked. [2020-10-24 02:30:19,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524076716] [2020-10-24 02:30:19,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:19,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-24 02:30:19,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527510092] [2020-10-24 02:30:19,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-24 02:30:19,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:19,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-24 02:30:19,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=2549, Unknown=0, NotChecked=0, Total=2970 [2020-10-24 02:30:19,765 INFO L87 Difference]: Start difference. First operand 700 states and 737 transitions. Second operand 55 states. [2020-10-24 02:30:28,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:28,919 INFO L93 Difference]: Finished difference Result 1131 states and 1202 transitions. [2020-10-24 02:30:28,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-10-24 02:30:28,922 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 419 [2020-10-24 02:30:28,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:28,925 INFO L225 Difference]: With dead ends: 1131 [2020-10-24 02:30:28,925 INFO L226 Difference]: Without dead ends: 918 [2020-10-24 02:30:28,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6774 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=4363, Invalid=18287, Unknown=0, NotChecked=0, Total=22650 [2020-10-24 02:30:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2020-10-24 02:30:29,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 706. [2020-10-24 02:30:29,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-10-24 02:30:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 743 transitions. [2020-10-24 02:30:29,335 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 743 transitions. Word has length 419 [2020-10-24 02:30:29,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:29,335 INFO L481 AbstractCegarLoop]: Abstraction has 706 states and 743 transitions. [2020-10-24 02:30:29,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-24 02:30:29,335 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 743 transitions. [2020-10-24 02:30:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-10-24 02:30:29,338 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:29,338 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 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, 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 02:30:29,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-24 02:30:29,338 INFO L429 AbstractCegarLoop]: === Iteration 70 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:29,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:29,339 INFO L82 PathProgramCache]: Analyzing trace with hash 918667572, now seen corresponding path program 43 times [2020-10-24 02:30:29,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:29,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185331348] [2020-10-24 02:30:29,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:29,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:32,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:32,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:33,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1992 backedges. 820 proven. 602 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2020-10-24 02:30:33,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185331348] [2020-10-24 02:30:33,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:33,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-24 02:30:33,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533216668] [2020-10-24 02:30:33,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-24 02:30:33,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:33,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-24 02:30:33,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=2807, Unknown=0, NotChecked=0, Total=3192 [2020-10-24 02:30:33,107 INFO L87 Difference]: Start difference. First operand 706 states and 743 transitions. Second operand 57 states. [2020-10-24 02:30:55,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:30:55,258 INFO L93 Difference]: Finished difference Result 2173 states and 2316 transitions. [2020-10-24 02:30:55,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2020-10-24 02:30:55,263 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 425 [2020-10-24 02:30:55,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:30:55,267 INFO L225 Difference]: With dead ends: 2173 [2020-10-24 02:30:55,267 INFO L226 Difference]: Without dead ends: 1904 [2020-10-24 02:30:55,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11869 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=5364, Invalid=33248, Unknown=0, NotChecked=0, Total=38612 [2020-10-24 02:30:55,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1904 states. [2020-10-24 02:30:55,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1904 to 814. [2020-10-24 02:30:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 814 states. [2020-10-24 02:30:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 814 states to 814 states and 859 transitions. [2020-10-24 02:30:55,914 INFO L78 Accepts]: Start accepts. Automaton has 814 states and 859 transitions. Word has length 425 [2020-10-24 02:30:55,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:30:55,915 INFO L481 AbstractCegarLoop]: Abstraction has 814 states and 859 transitions. [2020-10-24 02:30:55,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-24 02:30:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand 814 states and 859 transitions. [2020-10-24 02:30:55,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 426 [2020-10-24 02:30:55,917 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:30:55,917 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 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, 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 02:30:55,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-24 02:30:55,918 INFO L429 AbstractCegarLoop]: === Iteration 71 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:30:55,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:30:55,918 INFO L82 PathProgramCache]: Analyzing trace with hash 341226652, now seen corresponding path program 44 times [2020-10-24 02:30:55,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:30:55,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792401907] [2020-10-24 02:30:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:30:55,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:59,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:30:59,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:30:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 1991 backedges. 436 proven. 911 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2020-10-24 02:30:59,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792401907] [2020-10-24 02:30:59,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:30:59,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-24 02:30:59,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679093052] [2020-10-24 02:30:59,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-24 02:30:59,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:30:59,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-24 02:30:59,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=3017, Unknown=0, NotChecked=0, Total=3422 [2020-10-24 02:30:59,861 INFO L87 Difference]: Start difference. First operand 814 states and 859 transitions. Second operand 59 states. [2020-10-24 02:31:12,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:12,205 INFO L93 Difference]: Finished difference Result 1088 states and 1151 transitions. [2020-10-24 02:31:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-24 02:31:12,208 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 425 [2020-10-24 02:31:12,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:12,211 INFO L225 Difference]: With dead ends: 1088 [2020-10-24 02:31:12,211 INFO L226 Difference]: Without dead ends: 1080 [2020-10-24 02:31:12,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4644 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=3712, Invalid=16028, Unknown=0, NotChecked=0, Total=19740 [2020-10-24 02:31:12,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2020-10-24 02:31:13,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1027. [2020-10-24 02:31:13,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1027 states. [2020-10-24 02:31:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 1090 transitions. [2020-10-24 02:31:13,056 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 1090 transitions. Word has length 425 [2020-10-24 02:31:13,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:13,056 INFO L481 AbstractCegarLoop]: Abstraction has 1027 states and 1090 transitions. [2020-10-24 02:31:13,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-24 02:31:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 1090 transitions. [2020-10-24 02:31:13,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-10-24 02:31:13,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:13,059 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 5, 5, 5, 5, 5, 5, 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, 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 02:31:13,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-24 02:31:13,060 INFO L429 AbstractCegarLoop]: === Iteration 72 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:13,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:13,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1439549444, now seen corresponding path program 45 times [2020-10-24 02:31:13,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:13,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420303094] [2020-10-24 02:31:13,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:13,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:17,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:17,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 832 proven. 746 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2020-10-24 02:31:17,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420303094] [2020-10-24 02:31:17,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:17,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-24 02:31:17,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588666913] [2020-10-24 02:31:17,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-24 02:31:17,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:17,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-24 02:31:17,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=3145, Unknown=0, NotChecked=0, Total=3540 [2020-10-24 02:31:17,403 INFO L87 Difference]: Start difference. First operand 1027 states and 1090 transitions. Second operand 60 states. [2020-10-24 02:31:44,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:31:44,384 INFO L93 Difference]: Finished difference Result 2701 states and 2884 transitions. [2020-10-24 02:31:44,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2020-10-24 02:31:44,388 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 437 [2020-10-24 02:31:44,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:31:44,390 INFO L225 Difference]: With dead ends: 2701 [2020-10-24 02:31:44,390 INFO L226 Difference]: Without dead ends: 489 [2020-10-24 02:31:44,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15602 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=6787, Invalid=42719, Unknown=0, NotChecked=0, Total=49506 [2020-10-24 02:31:44,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-10-24 02:31:44,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 486. [2020-10-24 02:31:44,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 486 states. [2020-10-24 02:31:44,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 507 transitions. [2020-10-24 02:31:44,653 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 507 transitions. Word has length 437 [2020-10-24 02:31:44,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:31:44,653 INFO L481 AbstractCegarLoop]: Abstraction has 486 states and 507 transitions. [2020-10-24 02:31:44,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-24 02:31:44,653 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 507 transitions. [2020-10-24 02:31:44,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2020-10-24 02:31:44,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:31:44,656 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 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, 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 02:31:44,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-24 02:31:44,656 INFO L429 AbstractCegarLoop]: === Iteration 73 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:31:44,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:31:44,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1589788828, now seen corresponding path program 46 times [2020-10-24 02:31:44,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:31:44,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178222813] [2020-10-24 02:31:44,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:31:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:48,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:31:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:31:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2140 backedges. 953 proven. 543 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2020-10-24 02:31:48,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178222813] [2020-10-24 02:31:48,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:31:48,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-24 02:31:48,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984019659] [2020-10-24 02:31:48,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-24 02:31:48,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:31:48,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-24 02:31:48,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=2765, Unknown=0, NotChecked=0, Total=3192 [2020-10-24 02:31:48,775 INFO L87 Difference]: Start difference. First operand 486 states and 507 transitions. Second operand 57 states. [2020-10-24 02:32:04,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:04,882 INFO L93 Difference]: Finished difference Result 2003 states and 2135 transitions. [2020-10-24 02:32:04,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2020-10-24 02:32:04,886 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 437 [2020-10-24 02:32:04,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:04,890 INFO L225 Difference]: With dead ends: 2003 [2020-10-24 02:32:04,890 INFO L226 Difference]: Without dead ends: 1713 [2020-10-24 02:32:04,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6255 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=3692, Invalid=19870, Unknown=0, NotChecked=0, Total=23562 [2020-10-24 02:32:04,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2020-10-24 02:32:05,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 750. [2020-10-24 02:32:05,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 750 states. [2020-10-24 02:32:05,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 790 transitions. [2020-10-24 02:32:05,426 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 790 transitions. Word has length 437 [2020-10-24 02:32:05,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:05,426 INFO L481 AbstractCegarLoop]: Abstraction has 750 states and 790 transitions. [2020-10-24 02:32:05,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-24 02:32:05,426 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 790 transitions. [2020-10-24 02:32:05,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2020-10-24 02:32:05,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:05,430 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 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, 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 02:32:05,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-24 02:32:05,431 INFO L429 AbstractCegarLoop]: === Iteration 74 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:05,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:05,431 INFO L82 PathProgramCache]: Analyzing trace with hash -491703604, now seen corresponding path program 47 times [2020-10-24 02:32:05,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:05,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111590653] [2020-10-24 02:32:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:09,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2220 backedges. 507 proven. 561 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-10-24 02:32:09,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111590653] [2020-10-24 02:32:09,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:09,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-24 02:32:09,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875510479] [2020-10-24 02:32:09,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-24 02:32:09,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:09,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-24 02:32:09,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2941, Unknown=0, NotChecked=0, Total=3422 [2020-10-24 02:32:09,835 INFO L87 Difference]: Start difference. First operand 750 states and 790 transitions. Second operand 59 states. [2020-10-24 02:32:24,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:24,098 INFO L93 Difference]: Finished difference Result 1205 states and 1281 transitions. [2020-10-24 02:32:24,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-10-24 02:32:24,102 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 443 [2020-10-24 02:32:24,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:24,105 INFO L225 Difference]: With dead ends: 1205 [2020-10-24 02:32:24,105 INFO L226 Difference]: Without dead ends: 980 [2020-10-24 02:32:24,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7968 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=5083, Invalid=21323, Unknown=0, NotChecked=0, Total=26406 [2020-10-24 02:32:24,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2020-10-24 02:32:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 756. [2020-10-24 02:32:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 756 states. [2020-10-24 02:32:24,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 796 transitions. [2020-10-24 02:32:24,590 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 796 transitions. Word has length 443 [2020-10-24 02:32:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:32:24,590 INFO L481 AbstractCegarLoop]: Abstraction has 756 states and 796 transitions. [2020-10-24 02:32:24,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-24 02:32:24,590 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 796 transitions. [2020-10-24 02:32:24,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-10-24 02:32:24,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:32:24,593 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 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, 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 02:32:24,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-24 02:32:24,593 INFO L429 AbstractCegarLoop]: === Iteration 75 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:32:24,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:32:24,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1302696404, now seen corresponding path program 48 times [2020-10-24 02:32:24,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:32:24,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722489550] [2020-10-24 02:32:24,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:32:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:29,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:32:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:32:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 965 proven. 692 refuted. 0 times theorem prover too weak. 644 trivial. 0 not checked. [2020-10-24 02:32:29,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722489550] [2020-10-24 02:32:29,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:32:29,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-24 02:32:29,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699115105] [2020-10-24 02:32:29,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-24 02:32:29,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:32:29,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-24 02:32:29,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=3219, Unknown=0, NotChecked=0, Total=3660 [2020-10-24 02:32:29,571 INFO L87 Difference]: Start difference. First operand 756 states and 796 transitions. Second operand 61 states. [2020-10-24 02:32:59,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:32:59,883 INFO L93 Difference]: Finished difference Result 2418 states and 2579 transitions. [2020-10-24 02:32:59,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2020-10-24 02:32:59,888 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 449 [2020-10-24 02:32:59,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:32:59,893 INFO L225 Difference]: With dead ends: 2418 [2020-10-24 02:32:59,893 INFO L226 Difference]: Without dead ends: 2128 [2020-10-24 02:32:59,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13974 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=6251, Invalid=38905, Unknown=0, NotChecked=0, Total=45156 [2020-10-24 02:32:59,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2128 states. [2020-10-24 02:33:00,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2128 to 876. [2020-10-24 02:33:00,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 876 states. [2020-10-24 02:33:00,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 925 transitions. [2020-10-24 02:33:00,728 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 925 transitions. Word has length 449 [2020-10-24 02:33:00,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:33:00,729 INFO L481 AbstractCegarLoop]: Abstraction has 876 states and 925 transitions. [2020-10-24 02:33:00,729 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-24 02:33:00,729 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 925 transitions. [2020-10-24 02:33:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-10-24 02:33:00,732 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:33:00,732 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 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, 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 02:33:00,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-24 02:33:00,732 INFO L429 AbstractCegarLoop]: === Iteration 76 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:33:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:33:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash 964890004, now seen corresponding path program 49 times [2020-10-24 02:33:00,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:33:00,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078428975] [2020-10-24 02:33:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:33:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:06,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:33:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2300 backedges. 511 proven. 1065 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2020-10-24 02:33:06,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078428975] [2020-10-24 02:33:06,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:33:06,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-24 02:33:06,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584438087] [2020-10-24 02:33:06,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-24 02:33:06,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:33:06,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-24 02:33:06,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=3443, Unknown=0, NotChecked=0, Total=3906 [2020-10-24 02:33:06,511 INFO L87 Difference]: Start difference. First operand 876 states and 925 transitions. Second operand 63 states. [2020-10-24 02:33:23,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:33:23,698 INFO L93 Difference]: Finished difference Result 1166 states and 1234 transitions. [2020-10-24 02:33:23,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-24 02:33:23,703 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 449 [2020-10-24 02:33:23,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:33:23,706 INFO L225 Difference]: With dead ends: 1166 [2020-10-24 02:33:23,706 INFO L226 Difference]: Without dead ends: 1158 [2020-10-24 02:33:23,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5359 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=4275, Invalid=18375, Unknown=0, NotChecked=0, Total=22650 [2020-10-24 02:33:23,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1158 states. [2020-10-24 02:33:24,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1158 to 1101. [2020-10-24 02:33:24,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1101 states. [2020-10-24 02:33:24,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1169 transitions. [2020-10-24 02:33:24,862 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1169 transitions. Word has length 449 [2020-10-24 02:33:24,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:33:24,862 INFO L481 AbstractCegarLoop]: Abstraction has 1101 states and 1169 transitions. [2020-10-24 02:33:24,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-24 02:33:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1169 transitions. [2020-10-24 02:33:24,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-10-24 02:33:24,865 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:33:24,866 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 5, 5, 5, 5, 5, 5, 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, 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 02:33:24,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-24 02:33:24,866 INFO L429 AbstractCegarLoop]: === Iteration 77 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:33:24,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:33:24,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1581199604, now seen corresponding path program 50 times [2020-10-24 02:33:24,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:33:24,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271312785] [2020-10-24 02:33:24,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:33:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:30,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:33:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:33:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 977 proven. 848 refuted. 0 times theorem prover too weak. 649 trivial. 0 not checked. [2020-10-24 02:33:31,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271312785] [2020-10-24 02:33:31,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:33:31,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-24 02:33:31,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903463696] [2020-10-24 02:33:31,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-24 02:33:31,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:33:31,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-24 02:33:31,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=3581, Unknown=0, NotChecked=0, Total=4032 [2020-10-24 02:33:31,059 INFO L87 Difference]: Start difference. First operand 1101 states and 1169 transitions. Second operand 64 states. [2020-10-24 02:34:12,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:34:12,332 INFO L93 Difference]: Finished difference Result 3005 states and 3211 transitions. [2020-10-24 02:34:12,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2020-10-24 02:34:12,337 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 461 [2020-10-24 02:34:12,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:34:12,340 INFO L225 Difference]: With dead ends: 3005 [2020-10-24 02:34:12,340 INFO L226 Difference]: Without dead ends: 513 [2020-10-24 02:34:12,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18355 ImplicationChecksByTransitivity, 33.6s TimeCoverageRelationStatistics Valid=7880, Invalid=49960, Unknown=0, NotChecked=0, Total=57840 [2020-10-24 02:34:12,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2020-10-24 02:34:12,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 510. [2020-10-24 02:34:12,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 510 states. [2020-10-24 02:34:12,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 532 transitions. [2020-10-24 02:34:12,813 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 532 transitions. Word has length 461 [2020-10-24 02:34:12,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:34:12,813 INFO L481 AbstractCegarLoop]: Abstraction has 510 states and 532 transitions. [2020-10-24 02:34:12,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-24 02:34:12,813 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 532 transitions. [2020-10-24 02:34:12,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-10-24 02:34:12,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:34:12,816 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 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, 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 02:34:12,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-24 02:34:12,816 INFO L429 AbstractCegarLoop]: === Iteration 78 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:34:12,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:34:12,816 INFO L82 PathProgramCache]: Analyzing trace with hash 2106877020, now seen corresponding path program 51 times [2020-10-24 02:34:12,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:34:12,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851791074] [2020-10-24 02:34:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:34:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:18,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:34:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2461 backedges. 1110 proven. 627 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2020-10-24 02:34:18,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851791074] [2020-10-24 02:34:18,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:34:18,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-24 02:34:18,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514159794] [2020-10-24 02:34:18,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-24 02:34:18,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:34:18,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-24 02:34:18,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=3173, Unknown=0, NotChecked=0, Total=3660 [2020-10-24 02:34:18,799 INFO L87 Difference]: Start difference. First operand 510 states and 532 transitions. Second operand 61 states. [2020-10-24 02:34:44,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:34:44,372 INFO L93 Difference]: Finished difference Result 2221 states and 2369 transitions. [2020-10-24 02:34:44,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2020-10-24 02:34:44,378 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 461 [2020-10-24 02:34:44,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:34:44,382 INFO L225 Difference]: With dead ends: 2221 [2020-10-24 02:34:44,382 INFO L226 Difference]: Without dead ends: 1910 [2020-10-24 02:34:44,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7321 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=4277, Invalid=23113, Unknown=0, NotChecked=0, Total=27390 [2020-10-24 02:34:44,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2020-10-24 02:34:45,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 800. [2020-10-24 02:34:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2020-10-24 02:34:45,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 843 transitions. [2020-10-24 02:34:45,067 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 843 transitions. Word has length 461 [2020-10-24 02:34:45,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:34:45,067 INFO L481 AbstractCegarLoop]: Abstraction has 800 states and 843 transitions. [2020-10-24 02:34:45,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-24 02:34:45,067 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 843 transitions. [2020-10-24 02:34:45,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2020-10-24 02:34:45,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:34:45,070 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 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, 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 02:34:45,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-24 02:34:45,070 INFO L429 AbstractCegarLoop]: === Iteration 79 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:34:45,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:34:45,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1136779324, now seen corresponding path program 52 times [2020-10-24 02:34:45,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:34:45,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102773184] [2020-10-24 02:34:45,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:34:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:51,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:34:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:34:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2547 backedges. 588 proven. 646 refuted. 0 times theorem prover too weak. 1313 trivial. 0 not checked. [2020-10-24 02:34:52,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102773184] [2020-10-24 02:34:52,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:34:52,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-24 02:34:52,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999852849] [2020-10-24 02:34:52,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-24 02:34:52,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:34:52,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-24 02:34:52,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=545, Invalid=3361, Unknown=0, NotChecked=0, Total=3906 [2020-10-24 02:34:52,054 INFO L87 Difference]: Start difference. First operand 800 states and 843 transitions. Second operand 63 states. [2020-10-24 02:35:12,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:35:12,309 INFO L93 Difference]: Finished difference Result 1279 states and 1360 transitions. [2020-10-24 02:35:12,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-10-24 02:35:12,314 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 467 [2020-10-24 02:35:12,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:35:12,317 INFO L225 Difference]: With dead ends: 1279 [2020-10-24 02:35:12,317 INFO L226 Difference]: Without dead ends: 1042 [2020-10-24 02:35:12,319 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9259 ImplicationChecksByTransitivity, 21.0s TimeCoverageRelationStatistics Valid=5858, Invalid=24592, Unknown=0, NotChecked=0, Total=30450 [2020-10-24 02:35:12,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2020-10-24 02:35:12,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 806. [2020-10-24 02:35:12,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2020-10-24 02:35:12,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 849 transitions. [2020-10-24 02:35:12,944 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 849 transitions. Word has length 467 [2020-10-24 02:35:12,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:35:12,944 INFO L481 AbstractCegarLoop]: Abstraction has 806 states and 849 transitions. [2020-10-24 02:35:12,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-24 02:35:12,944 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 849 transitions. [2020-10-24 02:35:12,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-10-24 02:35:12,947 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:35:12,947 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 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, 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 02:35:12,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-24 02:35:12,947 INFO L429 AbstractCegarLoop]: === Iteration 80 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:35:12,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:35:12,948 INFO L82 PathProgramCache]: Analyzing trace with hash 99704612, now seen corresponding path program 53 times [2020-10-24 02:35:12,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:35:12,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701142619] [2020-10-24 02:35:12,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:35:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:19,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:35:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:35:20,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2634 backedges. 1122 proven. 788 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2020-10-24 02:35:20,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701142619] [2020-10-24 02:35:20,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:35:20,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-24 02:35:20,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514377089] [2020-10-24 02:35:20,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-24 02:35:20,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:35:20,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-24 02:35:20,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=3659, Unknown=0, NotChecked=0, Total=4160 [2020-10-24 02:35:20,216 INFO L87 Difference]: Start difference. First operand 806 states and 849 transitions. Second operand 65 states. [2020-10-24 02:36:07,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:36:07,310 INFO L93 Difference]: Finished difference Result 2675 states and 2855 transitions. [2020-10-24 02:36:07,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2020-10-24 02:36:07,318 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 473 [2020-10-24 02:36:07,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:36:07,325 INFO L225 Difference]: With dead ends: 2675 [2020-10-24 02:36:07,325 INFO L226 Difference]: Without dead ends: 2364 [2020-10-24 02:36:07,331 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16251 ImplicationChecksByTransitivity, 36.6s TimeCoverageRelationStatistics Valid=7206, Invalid=45006, Unknown=0, NotChecked=0, Total=52212 [2020-10-24 02:36:07,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2364 states. [2020-10-24 02:36:08,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2364 to 938. [2020-10-24 02:36:08,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 938 states. [2020-10-24 02:36:08,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 991 transitions. [2020-10-24 02:36:08,668 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 991 transitions. Word has length 473 [2020-10-24 02:36:08,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:36:08,668 INFO L481 AbstractCegarLoop]: Abstraction has 938 states and 991 transitions. [2020-10-24 02:36:08,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-24 02:36:08,668 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 991 transitions. [2020-10-24 02:36:08,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2020-10-24 02:36:08,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:36:08,671 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 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, 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 02:36:08,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-24 02:36:08,672 INFO L429 AbstractCegarLoop]: === Iteration 81 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:36:08,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:36:08,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1832495756, now seen corresponding path program 54 times [2020-10-24 02:36:08,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:36:08,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809364110] [2020-10-24 02:36:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:36:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:36:17,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:36:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:36:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2633 backedges. 592 proven. 1231 refuted. 0 times theorem prover too weak. 810 trivial. 0 not checked. [2020-10-24 02:36:17,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809364110] [2020-10-24 02:36:17,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:36:17,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-24 02:36:17,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71383373] [2020-10-24 02:36:17,288 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-24 02:36:17,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:36:17,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-24 02:36:17,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=525, Invalid=3897, Unknown=0, NotChecked=0, Total=4422 [2020-10-24 02:36:17,289 INFO L87 Difference]: Start difference. First operand 938 states and 991 transitions. Second operand 67 states. [2020-10-24 02:36:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:36:44,486 INFO L93 Difference]: Finished difference Result 1244 states and 1317 transitions. [2020-10-24 02:36:44,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-10-24 02:36:44,492 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 473 [2020-10-24 02:36:44,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:36:44,496 INFO L225 Difference]: With dead ends: 1244 [2020-10-24 02:36:44,496 INFO L226 Difference]: Without dead ends: 1236 [2020-10-24 02:36:44,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6125 ImplicationChecksByTransitivity, 25.9s TimeCoverageRelationStatistics Valid=4878, Invalid=20882, Unknown=0, NotChecked=0, Total=25760 [2020-10-24 02:36:44,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2020-10-24 02:36:45,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 1175. [2020-10-24 02:36:45,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1175 states. [2020-10-24 02:36:45,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 1248 transitions. [2020-10-24 02:36:45,832 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 1248 transitions. Word has length 473 [2020-10-24 02:36:45,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:36:45,832 INFO L481 AbstractCegarLoop]: Abstraction has 1175 states and 1248 transitions. [2020-10-24 02:36:45,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-24 02:36:45,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 1248 transitions. [2020-10-24 02:36:45,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-10-24 02:36:45,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:36:45,836 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 5, 5, 5, 5, 5, 5, 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, 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 02:36:45,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-24 02:36:45,836 INFO L429 AbstractCegarLoop]: === Iteration 82 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:36:45,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:36:45,837 INFO L82 PathProgramCache]: Analyzing trace with hash 788819436, now seen corresponding path program 55 times [2020-10-24 02:36:45,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:36:45,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961133595] [2020-10-24 02:36:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:36:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:36:54,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:36:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:36:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2819 backedges. 1134 proven. 956 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2020-10-24 02:36:54,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961133595] [2020-10-24 02:36:54,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:36:54,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-24 02:36:54,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887088843] [2020-10-24 02:36:54,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-24 02:36:54,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:36:54,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-24 02:36:54,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=511, Invalid=4045, Unknown=0, NotChecked=0, Total=4556 [2020-10-24 02:36:54,915 INFO L87 Difference]: Start difference. First operand 1175 states and 1248 transitions. Second operand 68 states.