/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive/recHanoi03-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:26:17,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:26:17,420 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:26:17,453 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:26:17,466 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:26:17,467 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:26:17,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:26:17,470 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:26:17,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:26:17,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:26:17,474 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:26:17,476 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:26:17,478 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:26:17,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:26:17,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:26:17,482 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:26:17,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:26:17,496 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:26:17,497 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:26:17,498 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:26:17,499 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 20:26:17,521 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:26:17,521 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:26:17,523 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:26:17,524 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:26:17,524 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:26:17,524 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:26:17,524 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:26:17,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:26:17,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:26:17,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:26:17,526 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:26:17,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:26:17,526 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:26:17,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:26:17,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:26:17,527 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:26:17,527 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:26:17,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:26:17,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:26:17,528 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:26:17,528 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:26:17,529 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:26:17,529 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:26:18,022 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:26:18,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:26:18,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:26:18,076 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:26:18,077 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:26:18,078 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-10-23 20:26:18,170 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73abc805c/96633dbcbfff4851a83990366aa422a0/FLAGa3919717e [2020-10-23 20:26:18,839 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:26:18,839 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/recHanoi03-2.c [2020-10-23 20:26:18,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73abc805c/96633dbcbfff4851a83990366aa422a0/FLAGa3919717e [2020-10-23 20:26:19,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73abc805c/96633dbcbfff4851a83990366aa422a0 [2020-10-23 20:26:19,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:26:19,227 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:26:19,230 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:19,230 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:26:19,235 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:26:19,236 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:19" (1/1) ... [2020-10-23 20:26:19,244 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28737209 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:19, skipping insertion in model container [2020-10-23 20:26:19,244 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:26:19" (1/1) ... [2020-10-23 20:26:19,253 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:26:19,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:26:19,433 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:19,444 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:26:19,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:26:19,483 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:26:19,484 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:19 WrapperNode [2020-10-23 20:26:19,484 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:26:19,486 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:26:19,486 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:26:19,486 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:26:19,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:19" (1/1) ... [2020-10-23 20:26:19,500 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:19" (1/1) ... [2020-10-23 20:26:19,511 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:19" (1/1) ... [2020-10-23 20:26:19,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:19" (1/1) ... [2020-10-23 20:26:19,527 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:19" (1/1) ... [2020-10-23 20:26:19,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:19" (1/1) ... [2020-10-23 20:26:19,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:19" (1/1) ... [2020-10-23 20:26:19,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:26:19,544 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:26:19,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:26:19,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:26:19,547 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:19" (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 [2020-10-23 20:26:19,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:26:19,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:26:19,655 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:26:19,655 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2020-10-23 20:26:19,655 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:26:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:26:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:26:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:26:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:26:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 20:26:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2020-10-23 20:26:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:26:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:26:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:26:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:26:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:26:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:26:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:26:20,084 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:26:20,085 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:26:20,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:20 BoogieIcfgContainer [2020-10-23 20:26:20,087 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:26:20,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:26:20,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:26:20,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:26:20,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:26:19" (1/3) ... [2020-10-23 20:26:20,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de7969e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:20, skipping insertion in model container [2020-10-23 20:26:20,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:26:19" (2/3) ... [2020-10-23 20:26:20,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5de7969e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:26:20, skipping insertion in model container [2020-10-23 20:26:20,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:26:20" (3/3) ... [2020-10-23 20:26:20,097 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-2.c [2020-10-23 20:26:20,109 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:26:20,125 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:26:20,139 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:26:20,163 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:26:20,163 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:26:20,163 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:26:20,163 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:26:20,163 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:26:20,164 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:26:20,164 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:26:20,164 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:26:20,180 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-23 20:26:20,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 20:26:20,190 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:20,190 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] [2020-10-23 20:26:20,191 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:20,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:20,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1519440261, now seen corresponding path program 1 times [2020-10-23 20:26:20,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:20,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1054948561] [2020-10-23 20:26:20,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:20,283 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:20,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:20,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:20,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 20:26:20,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1054948561] [2020-10-23 20:26:20,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:20,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:26:20,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376207774] [2020-10-23 20:26:20,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:26:20,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:20,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:26:20,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:26:20,714 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 8 states. [2020-10-23 20:26:21,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:21,380 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-10-23 20:26:21,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 20:26:21,383 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-23 20:26:21,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:21,399 INFO L225 Difference]: With dead ends: 58 [2020-10-23 20:26:21,400 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 20:26:21,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-23 20:26:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 20:26:21,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-23 20:26:21,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 20:26:21,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-23 20:26:21,476 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 28 [2020-10-23 20:26:21,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:21,476 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-23 20:26:21,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:26:21,477 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-23 20:26:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 20:26:21,479 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:21,480 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:21,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:26:21,481 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:21,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:21,482 INFO L82 PathProgramCache]: Analyzing trace with hash -799218257, now seen corresponding path program 1 times [2020-10-23 20:26:21,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:21,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259925968] [2020-10-23 20:26:21,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:21,488 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:21,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:21,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:21,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:21,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:21,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-23 20:26:21,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259925968] [2020-10-23 20:26:21,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:21,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 20:26:21,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080277893] [2020-10-23 20:26:21,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 20:26:21,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:21,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 20:26:21,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:26:21,848 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2020-10-23 20:26:22,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:22,424 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2020-10-23 20:26:22,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-23 20:26:22,425 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-23 20:26:22,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:22,428 INFO L225 Difference]: With dead ends: 47 [2020-10-23 20:26:22,429 INFO L226 Difference]: Without dead ends: 40 [2020-10-23 20:26:22,434 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-23 20:26:22,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-23 20:26:22,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-23 20:26:22,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-23 20:26:22,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-10-23 20:26:22,466 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2020-10-23 20:26:22,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:22,468 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-10-23 20:26:22,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 20:26:22,468 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-10-23 20:26:22,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-23 20:26:22,473 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:22,474 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-10-23 20:26:22,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:26:22,474 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:22,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:22,477 INFO L82 PathProgramCache]: Analyzing trace with hash 717569989, now seen corresponding path program 2 times [2020-10-23 20:26:22,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:22,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770997209] [2020-10-23 20:26:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:22,486 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:22,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:22,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:22,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:22,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:22,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:22,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:22,845 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-23 20:26:22,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770997209] [2020-10-23 20:26:22,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:22,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 20:26:22,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756037699] [2020-10-23 20:26:22,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 20:26:22,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:22,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 20:26:22,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:26:22,848 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand 12 states. [2020-10-23 20:26:23,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:23,521 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-10-23 20:26:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-23 20:26:23,522 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2020-10-23 20:26:23,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:23,523 INFO L225 Difference]: With dead ends: 52 [2020-10-23 20:26:23,524 INFO L226 Difference]: Without dead ends: 45 [2020-10-23 20:26:23,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2020-10-23 20:26:23,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-23 20:26:23,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-23 20:26:23,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-23 20:26:23,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-23 20:26:23,539 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2020-10-23 20:26:23,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:23,539 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-23 20:26:23,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 20:26:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-23 20:26:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-23 20:26:23,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:23,541 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-10-23 20:26:23,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:26:23,542 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:23,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:23,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1384654703, now seen corresponding path program 3 times [2020-10-23 20:26:23,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:23,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1593080245] [2020-10-23 20:26:23,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:23,546 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:23,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:23,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:23,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:23,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:23,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:23,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:23,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:23,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:23,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-23 20:26:23,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1593080245] [2020-10-23 20:26:23,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:23,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 20:26:23,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387991601] [2020-10-23 20:26:23,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 20:26:23,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:23,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 20:26:23,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-23 20:26:23,890 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 14 states. [2020-10-23 20:26:24,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:24,923 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2020-10-23 20:26:24,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-23 20:26:24,926 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-10-23 20:26:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:24,927 INFO L225 Difference]: With dead ends: 57 [2020-10-23 20:26:24,928 INFO L226 Difference]: Without dead ends: 50 [2020-10-23 20:26:24,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2020-10-23 20:26:24,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-23 20:26:24,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-23 20:26:24,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-23 20:26:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-10-23 20:26:24,953 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 52 [2020-10-23 20:26:24,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:24,953 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-10-23 20:26:24,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 20:26:24,953 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-10-23 20:26:24,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-23 20:26:24,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:24,955 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-23 20:26:24,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:26:24,955 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:24,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:24,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1349115397, now seen corresponding path program 4 times [2020-10-23 20:26:24,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:24,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569642780] [2020-10-23 20:26:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:24,960 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:25,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:25,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:25,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:25,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:25,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:25,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:25,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:25,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:25,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-23 20:26:25,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569642780] [2020-10-23 20:26:25,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:25,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-23 20:26:25,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156311238] [2020-10-23 20:26:25,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 20:26:25,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:25,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 20:26:25,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:26:25,269 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 16 states. [2020-10-23 20:26:26,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:26,536 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2020-10-23 20:26:26,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-23 20:26:26,536 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-23 20:26:26,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:26,540 INFO L225 Difference]: With dead ends: 62 [2020-10-23 20:26:26,541 INFO L226 Difference]: Without dead ends: 55 [2020-10-23 20:26:26,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=147, Invalid=975, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 20:26:26,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-23 20:26:26,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-23 20:26:26,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-23 20:26:26,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-23 20:26:26,568 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 60 [2020-10-23 20:26:26,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:26,573 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-23 20:26:26,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 20:26:26,574 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-23 20:26:26,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-23 20:26:26,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:26,579 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 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] [2020-10-23 20:26:26,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:26:26,580 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:26,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:26,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1532049711, now seen corresponding path program 5 times [2020-10-23 20:26:26,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:26,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833149978] [2020-10-23 20:26:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:26,587 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:26,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:26,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:26,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:26,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:26,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:26,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:26,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:26,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:26,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:26,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:27,018 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-10-23 20:26:27,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833149978] [2020-10-23 20:26:27,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:27,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-23 20:26:27,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738492151] [2020-10-23 20:26:27,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 20:26:27,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:27,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 20:26:27,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-23 20:26:27,021 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 18 states. [2020-10-23 20:26:28,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:28,564 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-10-23 20:26:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-23 20:26:28,565 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 68 [2020-10-23 20:26:28,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:28,568 INFO L225 Difference]: With dead ends: 67 [2020-10-23 20:26:28,568 INFO L226 Difference]: Without dead ends: 60 [2020-10-23 20:26:28,570 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2020-10-23 20:26:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-23 20:26:28,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-23 20:26:28,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-23 20:26:28,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-10-23 20:26:28,607 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 68 [2020-10-23 20:26:28,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:28,607 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-10-23 20:26:28,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 20:26:28,608 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-10-23 20:26:28,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-23 20:26:28,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:28,609 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:28,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 20:26:28,612 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:28,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:28,613 INFO L82 PathProgramCache]: Analyzing trace with hash 386051141, now seen corresponding path program 6 times [2020-10-23 20:26:28,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:28,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737716729] [2020-10-23 20:26:28,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:28,617 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:28,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:28,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:28,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:28,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:28,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:28,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:28,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:28,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:29,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:29,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-10-23 20:26:29,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737716729] [2020-10-23 20:26:29,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:29,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-23 20:26:29,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129676329] [2020-10-23 20:26:29,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 20:26:29,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:29,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 20:26:29,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-10-23 20:26:29,202 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 20 states. [2020-10-23 20:26:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:30,907 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2020-10-23 20:26:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-23 20:26:30,907 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 76 [2020-10-23 20:26:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:30,909 INFO L225 Difference]: With dead ends: 72 [2020-10-23 20:26:30,909 INFO L226 Difference]: Without dead ends: 65 [2020-10-23 20:26:30,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=197, Invalid=1695, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 20:26:30,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-23 20:26:30,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-23 20:26:30,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 20:26:30,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-23 20:26:30,929 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 76 [2020-10-23 20:26:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:30,929 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-23 20:26:30,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 20:26:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-23 20:26:30,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-23 20:26:30,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:30,931 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:30,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 20:26:30,932 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:30,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:30,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1370757871, now seen corresponding path program 7 times [2020-10-23 20:26:30,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:30,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88782299] [2020-10-23 20:26:30,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:30,937 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:31,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:31,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:31,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:31,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:31,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:31,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:31,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:31,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:31,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:31,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:31,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:31,556 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-10-23 20:26:31,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88782299] [2020-10-23 20:26:31,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:31,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-10-23 20:26:31,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039787180] [2020-10-23 20:26:31,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 20:26:31,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:31,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 20:26:31,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-23 20:26:31,559 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 22 states. [2020-10-23 20:26:33,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:33,714 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2020-10-23 20:26:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-23 20:26:33,715 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 84 [2020-10-23 20:26:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:33,716 INFO L225 Difference]: With dead ends: 77 [2020-10-23 20:26:33,716 INFO L226 Difference]: Without dead ends: 70 [2020-10-23 20:26:33,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=222, Invalid=2130, Unknown=0, NotChecked=0, Total=2352 [2020-10-23 20:26:33,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-23 20:26:33,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-10-23 20:26:33,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-23 20:26:33,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2020-10-23 20:26:33,734 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 84 [2020-10-23 20:26:33,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:33,735 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2020-10-23 20:26:33,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 20:26:33,735 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2020-10-23 20:26:33,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-23 20:26:33,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:33,737 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:33,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 20:26:33,737 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:33,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:33,738 INFO L82 PathProgramCache]: Analyzing trace with hash 890481285, now seen corresponding path program 8 times [2020-10-23 20:26:33,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:33,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078933664] [2020-10-23 20:26:33,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:33,743 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:33,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:33,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:33,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:33,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:33,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:33,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:33,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:34,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:34,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:34,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:34,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:34,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:34,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:34,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:34,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:34,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-23 20:26:34,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078933664] [2020-10-23 20:26:34,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:34,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-10-23 20:26:34,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119662675] [2020-10-23 20:26:34,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 20:26:34,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:34,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 20:26:34,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-10-23 20:26:34,470 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand 24 states. [2020-10-23 20:26:36,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:36,992 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-10-23 20:26:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-23 20:26:36,992 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 92 [2020-10-23 20:26:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:36,994 INFO L225 Difference]: With dead ends: 82 [2020-10-23 20:26:36,994 INFO L226 Difference]: Without dead ends: 75 [2020-10-23 20:26:36,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=247, Invalid=2615, Unknown=0, NotChecked=0, Total=2862 [2020-10-23 20:26:36,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-23 20:26:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-23 20:26:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-23 20:26:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-23 20:26:37,013 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 92 [2020-10-23 20:26:37,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:37,014 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-23 20:26:37,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 20:26:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-23 20:26:37,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-23 20:26:37,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:37,016 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:37,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 20:26:37,016 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:37,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:37,017 INFO L82 PathProgramCache]: Analyzing trace with hash 296537263, now seen corresponding path program 9 times [2020-10-23 20:26:37,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:37,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1636006150] [2020-10-23 20:26:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:37,022 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:37,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:37,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:37,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:37,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:37,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:37,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:37,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:37,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:37,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:37,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:37,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:37,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-10-23 20:26:37,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1636006150] [2020-10-23 20:26:37,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:37,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-10-23 20:26:37,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731926491] [2020-10-23 20:26:37,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-23 20:26:37,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:37,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-23 20:26:37,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2020-10-23 20:26:37,783 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 26 states. [2020-10-23 20:26:40,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:40,724 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2020-10-23 20:26:40,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-23 20:26:40,725 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 100 [2020-10-23 20:26:40,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:40,727 INFO L225 Difference]: With dead ends: 87 [2020-10-23 20:26:40,727 INFO L226 Difference]: Without dead ends: 80 [2020-10-23 20:26:40,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=272, Invalid=3150, Unknown=0, NotChecked=0, Total=3422 [2020-10-23 20:26:40,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-23 20:26:40,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2020-10-23 20:26:40,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-23 20:26:40,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2020-10-23 20:26:40,746 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 100 [2020-10-23 20:26:40,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:40,747 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2020-10-23 20:26:40,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-23 20:26:40,747 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2020-10-23 20:26:40,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-23 20:26:40,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:40,748 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:40,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 20:26:40,749 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:40,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:40,749 INFO L82 PathProgramCache]: Analyzing trace with hash 203479237, now seen corresponding path program 10 times [2020-10-23 20:26:40,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:40,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335224160] [2020-10-23 20:26:40,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:40,755 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:40,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:40,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:40,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:40,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:40,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:40,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:40,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:40,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:41,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:41,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:41,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:41,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:41,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:41,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:41,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:41,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:41,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:41,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:41,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-10-23 20:26:41,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335224160] [2020-10-23 20:26:41,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:41,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-10-23 20:26:41,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285008656] [2020-10-23 20:26:41,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-23 20:26:41,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:41,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-23 20:26:41,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-10-23 20:26:41,805 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand 28 states. [2020-10-23 20:26:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:45,087 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2020-10-23 20:26:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-23 20:26:45,088 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 108 [2020-10-23 20:26:45,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:45,090 INFO L225 Difference]: With dead ends: 92 [2020-10-23 20:26:45,090 INFO L226 Difference]: Without dead ends: 85 [2020-10-23 20:26:45,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=297, Invalid=3735, Unknown=0, NotChecked=0, Total=4032 [2020-10-23 20:26:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-23 20:26:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-23 20:26:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-23 20:26:45,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2020-10-23 20:26:45,114 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 108 [2020-10-23 20:26:45,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:45,114 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2020-10-23 20:26:45,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-23 20:26:45,114 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2020-10-23 20:26:45,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-23 20:26:45,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:45,121 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:45,121 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 20:26:45,121 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:45,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:45,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1405661585, now seen corresponding path program 11 times [2020-10-23 20:26:45,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:45,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548528350] [2020-10-23 20:26:45,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:45,135 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:45,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:45,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:45,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:45,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:45,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:45,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:45,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:45,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:45,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:45,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:45,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:45,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:45,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:45,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:45,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:45,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:46,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:46,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:46,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:46,299 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-10-23 20:26:46,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548528350] [2020-10-23 20:26:46,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:46,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-10-23 20:26:46,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786682673] [2020-10-23 20:26:46,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-23 20:26:46,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:46,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-23 20:26:46,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2020-10-23 20:26:46,302 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand 30 states. [2020-10-23 20:26:50,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:50,387 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-10-23 20:26:50,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-23 20:26:50,388 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 116 [2020-10-23 20:26:50,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:50,389 INFO L225 Difference]: With dead ends: 97 [2020-10-23 20:26:50,390 INFO L226 Difference]: Without dead ends: 90 [2020-10-23 20:26:50,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=322, Invalid=4370, Unknown=0, NotChecked=0, Total=4692 [2020-10-23 20:26:50,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-23 20:26:50,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-23 20:26:50,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-23 20:26:50,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-10-23 20:26:50,411 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 116 [2020-10-23 20:26:50,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:50,412 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-10-23 20:26:50,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-23 20:26:50,412 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-10-23 20:26:50,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-23 20:26:50,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:50,414 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:50,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 20:26:50,414 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:50,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:50,414 INFO L82 PathProgramCache]: Analyzing trace with hash -391235835, now seen corresponding path program 12 times [2020-10-23 20:26:50,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:50,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81688532] [2020-10-23 20:26:50,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:50,421 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:50,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:50,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:50,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:50,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:50,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:50,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:50,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:50,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:50,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:51,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:51,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:51,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:51,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:51,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:51,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:51,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:51,648 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-10-23 20:26:51,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81688532] [2020-10-23 20:26:51,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:51,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-10-23 20:26:51,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841267070] [2020-10-23 20:26:51,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-23 20:26:51,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:51,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-23 20:26:51,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2020-10-23 20:26:51,652 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand 32 states. [2020-10-23 20:26:56,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:26:56,259 INFO L93 Difference]: Finished difference Result 102 states and 103 transitions. [2020-10-23 20:26:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-23 20:26:56,260 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 124 [2020-10-23 20:26:56,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:26:56,262 INFO L225 Difference]: With dead ends: 102 [2020-10-23 20:26:56,262 INFO L226 Difference]: Without dead ends: 95 [2020-10-23 20:26:56,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=347, Invalid=5055, Unknown=0, NotChecked=0, Total=5402 [2020-10-23 20:26:56,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-23 20:26:56,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-23 20:26:56,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-23 20:26:56,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-23 20:26:56,284 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 124 [2020-10-23 20:26:56,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:26:56,285 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-23 20:26:56,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-23 20:26:56,285 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-23 20:26:56,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-23 20:26:56,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:26:56,287 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:26:56,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 20:26:56,288 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:26:56,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:26:56,288 INFO L82 PathProgramCache]: Analyzing trace with hash 659529775, now seen corresponding path program 13 times [2020-10-23 20:26:56,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:26:56,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692239553] [2020-10-23 20:26:56,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:26:56,296 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:26:56,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:56,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:26:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:56,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:26:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:56,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:56,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:56,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:56,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:56,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:56,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:56,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:56,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:56,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:56,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:57,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:57,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:57,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:57,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:57,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:57,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:57,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:57,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:26:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:26:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-10-23 20:26:57,835 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692239553] [2020-10-23 20:26:57,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:26:57,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-10-23 20:26:57,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034638626] [2020-10-23 20:26:57,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-23 20:26:57,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:26:57,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-23 20:26:57,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 20:26:57,838 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 34 states. [2020-10-23 20:27:03,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:03,044 INFO L93 Difference]: Finished difference Result 107 states and 108 transitions. [2020-10-23 20:27:03,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-23 20:27:03,045 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 132 [2020-10-23 20:27:03,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:03,047 INFO L225 Difference]: With dead ends: 107 [2020-10-23 20:27:03,047 INFO L226 Difference]: Without dead ends: 100 [2020-10-23 20:27:03,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=372, Invalid=5790, Unknown=0, NotChecked=0, Total=6162 [2020-10-23 20:27:03,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-23 20:27:03,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2020-10-23 20:27:03,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-23 20:27:03,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2020-10-23 20:27:03,068 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 132 [2020-10-23 20:27:03,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:03,068 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2020-10-23 20:27:03,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-23 20:27:03,068 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2020-10-23 20:27:03,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-23 20:27:03,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:03,070 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:27:03,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 20:27:03,071 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:03,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:03,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1111475525, now seen corresponding path program 14 times [2020-10-23 20:27:03,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:03,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305157626] [2020-10-23 20:27:03,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:03,079 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:03,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:03,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:03,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:27:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:03,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:03,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:03,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:03,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:03,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:03,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:03,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:03,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:03,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:03,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:04,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:04,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:04,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:04,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:04,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:04,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:04,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:04,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-10-23 20:27:04,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305157626] [2020-10-23 20:27:04,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:04,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-10-23 20:27:04,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375711179] [2020-10-23 20:27:04,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-23 20:27:04,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:04,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-23 20:27:04,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 20:27:04,740 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand 36 states. [2020-10-23 20:27:10,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:10,608 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2020-10-23 20:27:10,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-23 20:27:10,609 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 140 [2020-10-23 20:27:10,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:10,611 INFO L225 Difference]: With dead ends: 112 [2020-10-23 20:27:10,611 INFO L226 Difference]: Without dead ends: 105 [2020-10-23 20:27:10,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=397, Invalid=6575, Unknown=0, NotChecked=0, Total=6972 [2020-10-23 20:27:10,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-23 20:27:10,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-23 20:27:10,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-23 20:27:10,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2020-10-23 20:27:10,632 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 140 [2020-10-23 20:27:10,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:10,632 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2020-10-23 20:27:10,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-23 20:27:10,632 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2020-10-23 20:27:10,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-23 20:27:10,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:10,634 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:27:10,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 20:27:10,634 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:10,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:10,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1039253999, now seen corresponding path program 15 times [2020-10-23 20:27:10,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:10,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927389114] [2020-10-23 20:27:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:10,643 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:10,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:10,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:10,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:27:10,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:10,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:10,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:10,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:11,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:11,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:11,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:11,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:11,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:11,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:11,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:12,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-10-23 20:27:12,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927389114] [2020-10-23 20:27:12,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:12,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-10-23 20:27:12,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706645863] [2020-10-23 20:27:12,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-23 20:27:12,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:12,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-23 20:27:12,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 20:27:12,317 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand 38 states. [2020-10-23 20:27:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:18,869 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2020-10-23 20:27:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-23 20:27:18,870 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 148 [2020-10-23 20:27:18,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:18,872 INFO L225 Difference]: With dead ends: 117 [2020-10-23 20:27:18,872 INFO L226 Difference]: Without dead ends: 110 [2020-10-23 20:27:18,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=422, Invalid=7410, Unknown=0, NotChecked=0, Total=7832 [2020-10-23 20:27:18,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-23 20:27:18,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2020-10-23 20:27:18,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-23 20:27:18,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2020-10-23 20:27:18,896 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 148 [2020-10-23 20:27:18,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:18,897 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2020-10-23 20:27:18,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-23 20:27:18,897 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2020-10-23 20:27:18,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-23 20:27:18,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:18,899 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:27:18,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 20:27:18,899 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:18,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:18,900 INFO L82 PathProgramCache]: Analyzing trace with hash -78019707, now seen corresponding path program 16 times [2020-10-23 20:27:18,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:18,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726240569] [2020-10-23 20:27:18,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:18,905 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:27:19,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:19,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:20,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:20,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:20,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:20,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:20,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:20,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:21,012 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-23 20:27:21,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726240569] [2020-10-23 20:27:21,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:21,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-10-23 20:27:21,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987786990] [2020-10-23 20:27:21,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-23 20:27:21,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:21,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-23 20:27:21,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 20:27:21,016 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 40 states. [2020-10-23 20:27:28,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:28,125 INFO L93 Difference]: Finished difference Result 122 states and 123 transitions. [2020-10-23 20:27:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-23 20:27:28,128 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 156 [2020-10-23 20:27:28,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:28,130 INFO L225 Difference]: With dead ends: 122 [2020-10-23 20:27:28,130 INFO L226 Difference]: Without dead ends: 115 [2020-10-23 20:27:28,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=447, Invalid=8295, Unknown=0, NotChecked=0, Total=8742 [2020-10-23 20:27:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-23 20:27:28,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-23 20:27:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-23 20:27:28,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2020-10-23 20:27:28,155 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 156 [2020-10-23 20:27:28,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:28,156 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2020-10-23 20:27:28,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-23 20:27:28,156 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2020-10-23 20:27:28,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-23 20:27:28,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:28,158 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:27:28,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 20:27:28,159 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:28,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:28,159 INFO L82 PathProgramCache]: Analyzing trace with hash 538555311, now seen corresponding path program 17 times [2020-10-23 20:27:28,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:28,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606181101] [2020-10-23 20:27:28,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:28,164 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:28,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:28,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:27:28,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:28,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:28,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:28,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:28,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:28,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:28,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:28,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:28,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:28,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:29,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:29,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:29,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:29,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:29,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:30,258 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-10-23 20:27:30,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606181101] [2020-10-23 20:27:30,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:30,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-10-23 20:27:30,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844369158] [2020-10-23 20:27:30,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-23 20:27:30,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:30,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-23 20:27:30,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2020-10-23 20:27:30,260 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 42 states. [2020-10-23 20:27:38,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:38,372 INFO L93 Difference]: Finished difference Result 127 states and 128 transitions. [2020-10-23 20:27:38,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-23 20:27:38,373 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 164 [2020-10-23 20:27:38,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:38,374 INFO L225 Difference]: With dead ends: 127 [2020-10-23 20:27:38,374 INFO L226 Difference]: Without dead ends: 120 [2020-10-23 20:27:38,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=472, Invalid=9230, Unknown=0, NotChecked=0, Total=9702 [2020-10-23 20:27:38,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-23 20:27:38,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-23 20:27:38,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-23 20:27:38,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2020-10-23 20:27:38,399 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 164 [2020-10-23 20:27:38,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:38,400 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2020-10-23 20:27:38,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-23 20:27:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2020-10-23 20:27:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-23 20:27:38,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:38,403 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:27:38,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 20:27:38,403 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:38,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:38,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1585483323, now seen corresponding path program 18 times [2020-10-23 20:27:38,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:38,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144869735] [2020-10-23 20:27:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:38,408 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:38,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:38,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:27:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:38,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:38,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:38,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:38,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:38,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:39,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:39,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:39,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:39,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:39,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:39,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:39,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:39,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:39,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:39,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:39,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:39,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:39,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:40,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:40,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:40,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:40,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:40,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-10-23 20:27:40,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144869735] [2020-10-23 20:27:40,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:40,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-10-23 20:27:40,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297724114] [2020-10-23 20:27:40,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-23 20:27:40,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:40,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-23 20:27:40,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1806, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 20:27:40,902 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand 44 states. [2020-10-23 20:27:49,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:49,608 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2020-10-23 20:27:49,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-23 20:27:49,610 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 172 [2020-10-23 20:27:49,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:49,612 INFO L225 Difference]: With dead ends: 132 [2020-10-23 20:27:49,612 INFO L226 Difference]: Without dead ends: 125 [2020-10-23 20:27:49,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1752 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=497, Invalid=10215, Unknown=0, NotChecked=0, Total=10712 [2020-10-23 20:27:49,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-23 20:27:49,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-10-23 20:27:49,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-23 20:27:49,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2020-10-23 20:27:49,638 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 172 [2020-10-23 20:27:49,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:49,639 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2020-10-23 20:27:49,639 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-23 20:27:49,639 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2020-10-23 20:27:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-23 20:27:49,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:49,640 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:27:49,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 20:27:49,640 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:49,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:49,640 INFO L82 PathProgramCache]: Analyzing trace with hash 851670383, now seen corresponding path program 19 times [2020-10-23 20:27:49,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:49,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657985666] [2020-10-23 20:27:49,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:49,645 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:49,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:49,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:49,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:49,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:27:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:49,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:49,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:49,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:50,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:50,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:50,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:50,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:50,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:50,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:50,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:50,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:50,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:50,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:50,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:50,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:50,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:51,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:51,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:51,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:51,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:51,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:51,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:51,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:51,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:51,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-10-23 20:27:52,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657985666] [2020-10-23 20:27:52,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:52,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-10-23 20:27:52,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638649336] [2020-10-23 20:27:52,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-23 20:27:52,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:52,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-23 20:27:52,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1980, Unknown=0, NotChecked=0, Total=2070 [2020-10-23 20:27:52,268 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand 46 states. [2020-10-23 20:28:01,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:01,850 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2020-10-23 20:28:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-23 20:28:01,851 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 180 [2020-10-23 20:28:01,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:01,853 INFO L225 Difference]: With dead ends: 137 [2020-10-23 20:28:01,853 INFO L226 Difference]: Without dead ends: 130 [2020-10-23 20:28:01,856 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=522, Invalid=11250, Unknown=0, NotChecked=0, Total=11772 [2020-10-23 20:28:01,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-23 20:28:01,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-10-23 20:28:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-23 20:28:01,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2020-10-23 20:28:01,885 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 180 [2020-10-23 20:28:01,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:01,886 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2020-10-23 20:28:01,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-23 20:28:01,886 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2020-10-23 20:28:01,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-23 20:28:01,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:01,887 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:01,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 20:28:01,887 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:01,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1388998651, now seen corresponding path program 20 times [2020-10-23 20:28:01,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:01,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602454011] [2020-10-23 20:28:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:01,893 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:01,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:02,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:28:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:03,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:03,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:03,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:03,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:03,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:03,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:03,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:03,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:03,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:04,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:04,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:04,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:04,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:04,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-10-23 20:28:04,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602454011] [2020-10-23 20:28:04,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:04,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-10-23 20:28:04,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285277225] [2020-10-23 20:28:04,872 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-23 20:28:04,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:04,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-23 20:28:04,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2020-10-23 20:28:04,873 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 48 states. [2020-10-23 20:28:15,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:15,261 INFO L93 Difference]: Finished difference Result 142 states and 143 transitions. [2020-10-23 20:28:15,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-23 20:28:15,262 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 188 [2020-10-23 20:28:15,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:15,267 INFO L225 Difference]: With dead ends: 142 [2020-10-23 20:28:15,268 INFO L226 Difference]: Without dead ends: 135 [2020-10-23 20:28:15,269 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2125 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=547, Invalid=12335, Unknown=0, NotChecked=0, Total=12882 [2020-10-23 20:28:15,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-23 20:28:15,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-10-23 20:28:15,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-23 20:28:15,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2020-10-23 20:28:15,305 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 188 [2020-10-23 20:28:15,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:15,306 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2020-10-23 20:28:15,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-23 20:28:15,306 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2020-10-23 20:28:15,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-23 20:28:15,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:15,308 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:15,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 20:28:15,308 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:15,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:15,309 INFO L82 PathProgramCache]: Analyzing trace with hash -806680785, now seen corresponding path program 21 times [2020-10-23 20:28:15,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:15,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948294415] [2020-10-23 20:28:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:15,313 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:15,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:28:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:16,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:16,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:16,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:17,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-10-23 20:28:18,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948294415] [2020-10-23 20:28:18,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:18,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-10-23 20:28:18,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530819730] [2020-10-23 20:28:18,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-23 20:28:18,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:18,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-23 20:28:18,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=2352, Unknown=0, NotChecked=0, Total=2450 [2020-10-23 20:28:18,534 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 50 states. [2020-10-23 20:28:30,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:30,072 INFO L93 Difference]: Finished difference Result 147 states and 148 transitions. [2020-10-23 20:28:30,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-23 20:28:30,076 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 196 [2020-10-23 20:28:30,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:30,077 INFO L225 Difference]: With dead ends: 147 [2020-10-23 20:28:30,077 INFO L226 Difference]: Without dead ends: 140 [2020-10-23 20:28:30,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2325 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=572, Invalid=13470, Unknown=0, NotChecked=0, Total=14042 [2020-10-23 20:28:30,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-23 20:28:30,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-10-23 20:28:30,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-23 20:28:30,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2020-10-23 20:28:30,111 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 196 [2020-10-23 20:28:30,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:30,111 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2020-10-23 20:28:30,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-23 20:28:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2020-10-23 20:28:30,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-23 20:28:30,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:30,113 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:30,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-23 20:28:30,114 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:30,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:30,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1040196027, now seen corresponding path program 22 times [2020-10-23 20:28:30,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:30,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478417121] [2020-10-23 20:28:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:30,118 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:30,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:28:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:30,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:30,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:31,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:31,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-10-23 20:28:33,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478417121] [2020-10-23 20:28:33,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:33,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-10-23 20:28:33,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898500642] [2020-10-23 20:28:33,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-23 20:28:33,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:33,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-23 20:28:33,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=2550, Unknown=0, NotChecked=0, Total=2652 [2020-10-23 20:28:33,575 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand 52 states. [2020-10-23 20:28:46,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:46,249 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2020-10-23 20:28:46,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-23 20:28:46,252 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 204 [2020-10-23 20:28:46,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:46,253 INFO L225 Difference]: With dead ends: 152 [2020-10-23 20:28:46,253 INFO L226 Difference]: Without dead ends: 145 [2020-10-23 20:28:46,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=597, Invalid=14655, Unknown=0, NotChecked=0, Total=15252 [2020-10-23 20:28:46,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-23 20:28:46,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-10-23 20:28:46,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-23 20:28:46,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2020-10-23 20:28:46,282 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 204 [2020-10-23 20:28:46,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:46,283 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2020-10-23 20:28:46,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-23 20:28:46,283 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2020-10-23 20:28:46,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-23 20:28:46,284 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:46,285 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:46,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-23 20:28:46,285 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:46,285 INFO L82 PathProgramCache]: Analyzing trace with hash 109865199, now seen corresponding path program 23 times [2020-10-23 20:28:46,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:46,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065390717] [2020-10-23 20:28:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:46,289 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:46,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:46,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:46,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:28:46,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:46,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:46,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:46,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:46,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:46,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:46,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:46,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:46,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:46,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:47,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:47,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:47,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:47,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:47,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:47,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:47,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:47,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:47,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:47,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:47,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:48,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:48,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:48,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:48,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:48,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:48,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:48,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:49,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:49,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:49,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-10-23 20:28:50,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065390717] [2020-10-23 20:28:50,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:50,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-10-23 20:28:50,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870188199] [2020-10-23 20:28:50,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-23 20:28:50,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:50,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-23 20:28:50,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=2756, Unknown=0, NotChecked=0, Total=2862 [2020-10-23 20:28:50,068 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand 54 states. [2020-10-23 20:29:04,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:04,028 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2020-10-23 20:29:04,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-23 20:29:04,030 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 212 [2020-10-23 20:29:04,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:04,032 INFO L225 Difference]: With dead ends: 157 [2020-10-23 20:29:04,032 INFO L226 Difference]: Without dead ends: 150 [2020-10-23 20:29:04,034 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2752 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=622, Invalid=15890, Unknown=0, NotChecked=0, Total=16512 [2020-10-23 20:29:04,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-23 20:29:04,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-10-23 20:29:04,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-23 20:29:04,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2020-10-23 20:29:04,069 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 212 [2020-10-23 20:29:04,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:04,070 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2020-10-23 20:29:04,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-23 20:29:04,070 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2020-10-23 20:29:04,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-10-23 20:29:04,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:04,072 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:29:04,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-23 20:29:04,072 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:04,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:04,073 INFO L82 PathProgramCache]: Analyzing trace with hash -295543675, now seen corresponding path program 24 times [2020-10-23 20:29:04,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:04,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718992370] [2020-10-23 20:29:04,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:04,076 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:04,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:04,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:29:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:04,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:04,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:04,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:04,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:04,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:04,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:04,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:04,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:04,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:05,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:05,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:05,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:05,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:05,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:05,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:05,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:05,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:05,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:06,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:06,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:06,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:06,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:06,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:06,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:06,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:06,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:06,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:07,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:07,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:07,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:07,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:08,367 INFO L134 CoverageAnalysis]: Checked inductivity of 876 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-10-23 20:29:08,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718992370] [2020-10-23 20:29:08,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:08,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-10-23 20:29:08,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450505459] [2020-10-23 20:29:08,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-23 20:29:08,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:08,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-23 20:29:08,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2970, Unknown=0, NotChecked=0, Total=3080 [2020-10-23 20:29:08,369 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand 56 states. [2020-10-23 20:29:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:23,394 INFO L93 Difference]: Finished difference Result 162 states and 163 transitions. [2020-10-23 20:29:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-23 20:29:23,395 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 220 [2020-10-23 20:29:23,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:23,397 INFO L225 Difference]: With dead ends: 162 [2020-10-23 20:29:23,397 INFO L226 Difference]: Without dead ends: 155 [2020-10-23 20:29:23,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2979 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=647, Invalid=17175, Unknown=0, NotChecked=0, Total=17822 [2020-10-23 20:29:23,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-23 20:29:23,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-10-23 20:29:23,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-23 20:29:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2020-10-23 20:29:23,429 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 220 [2020-10-23 20:29:23,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:23,430 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2020-10-23 20:29:23,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-23 20:29:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2020-10-23 20:29:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-23 20:29:23,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:23,431 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:29:23,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-23 20:29:23,432 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:23,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:23,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1520671407, now seen corresponding path program 25 times [2020-10-23 20:29:23,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:23,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317556275] [2020-10-23 20:29:23,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:23,436 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:23,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:23,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:23,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:29:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:23,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:23,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:23,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:23,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:23,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:23,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:23,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:24,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:24,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:24,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:24,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:24,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:24,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:24,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:24,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:24,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:24,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:24,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:24,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:25,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:25,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:25,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:25,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:25,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:25,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:25,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:25,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:26,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:26,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:26,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:26,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:26,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:27,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:27,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:27,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-10-23 20:29:28,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317556275] [2020-10-23 20:29:28,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:28,186 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2020-10-23 20:29:28,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604305054] [2020-10-23 20:29:28,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-23 20:29:28,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:28,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-23 20:29:28,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=3192, Unknown=0, NotChecked=0, Total=3306 [2020-10-23 20:29:28,188 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 58 states. [2020-10-23 20:29:44,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:44,802 INFO L93 Difference]: Finished difference Result 167 states and 168 transitions. [2020-10-23 20:29:44,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-23 20:29:44,803 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 228 [2020-10-23 20:29:44,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:44,805 INFO L225 Difference]: With dead ends: 167 [2020-10-23 20:29:44,805 INFO L226 Difference]: Without dead ends: 160 [2020-10-23 20:29:44,807 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3215 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=672, Invalid=18510, Unknown=0, NotChecked=0, Total=19182 [2020-10-23 20:29:44,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-23 20:29:44,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-23 20:29:44,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-23 20:29:44,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2020-10-23 20:29:44,848 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 228 [2020-10-23 20:29:44,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:44,848 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2020-10-23 20:29:44,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-23 20:29:44,848 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2020-10-23 20:29:44,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-10-23 20:29:44,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:44,850 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:29:44,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-23 20:29:44,851 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:44,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:44,851 INFO L82 PathProgramCache]: Analyzing trace with hash -337573179, now seen corresponding path program 26 times [2020-10-23 20:29:44,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:44,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458213949] [2020-10-23 20:29:44,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:44,856 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:29:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:45,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:45,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:45,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:45,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:46,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:46,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:46,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:46,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:46,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:46,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:46,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:46,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:46,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:47,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:47,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:47,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:47,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:47,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:47,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:47,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:48,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:48,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:48,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:48,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:48,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:48,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:48,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:49,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:49,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:49,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2020-10-23 20:29:49,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458213949] [2020-10-23 20:29:49,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:49,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-10-23 20:29:49,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842771060] [2020-10-23 20:29:49,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-23 20:29:49,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:49,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-23 20:29:49,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=3422, Unknown=0, NotChecked=0, Total=3540 [2020-10-23 20:29:49,983 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 60 states. [2020-10-23 20:30:08,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:08,146 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2020-10-23 20:30:08,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-23 20:30:08,148 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 236 [2020-10-23 20:30:08,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:08,150 INFO L225 Difference]: With dead ends: 172 [2020-10-23 20:30:08,150 INFO L226 Difference]: Without dead ends: 165 [2020-10-23 20:30:08,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3460 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=697, Invalid=19895, Unknown=0, NotChecked=0, Total=20592 [2020-10-23 20:30:08,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-23 20:30:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2020-10-23 20:30:08,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-23 20:30:08,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2020-10-23 20:30:08,191 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 236 [2020-10-23 20:30:08,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:08,192 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2020-10-23 20:30:08,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-23 20:30:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2020-10-23 20:30:08,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2020-10-23 20:30:08,193 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:08,193 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:08,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-23 20:30:08,194 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:08,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:08,194 INFO L82 PathProgramCache]: Analyzing trace with hash -2060673937, now seen corresponding path program 27 times [2020-10-23 20:30:08,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:08,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908802396] [2020-10-23 20:30:08,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:08,201 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:08,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:08,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:30:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:08,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:08,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:08,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:08,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:08,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:08,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:08,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:08,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:09,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:09,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:09,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:09,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:09,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:09,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:09,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:09,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:09,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:10,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:10,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:10,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:10,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:10,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:10,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:10,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:11,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:11,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:11,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:11,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:11,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:11,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:11,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:12,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:12,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:12,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:12,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:13,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:13,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1107 trivial. 0 not checked. [2020-10-23 20:30:14,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908802396] [2020-10-23 20:30:14,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:14,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2020-10-23 20:30:14,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203027203] [2020-10-23 20:30:14,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-23 20:30:14,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:14,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-23 20:30:14,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=3660, Unknown=0, NotChecked=0, Total=3782 [2020-10-23 20:30:14,288 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand 62 states. [2020-10-23 20:30:34,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:34,422 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2020-10-23 20:30:34,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-23 20:30:34,423 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 244 [2020-10-23 20:30:34,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:34,425 INFO L225 Difference]: With dead ends: 177 [2020-10-23 20:30:34,425 INFO L226 Difference]: Without dead ends: 170 [2020-10-23 20:30:34,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3714 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=722, Invalid=21330, Unknown=0, NotChecked=0, Total=22052 [2020-10-23 20:30:34,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-23 20:30:34,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2020-10-23 20:30:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-23 20:30:34,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2020-10-23 20:30:34,474 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 244 [2020-10-23 20:30:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:34,475 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2020-10-23 20:30:34,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-23 20:30:34,475 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2020-10-23 20:30:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2020-10-23 20:30:34,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:34,476 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:34,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-23 20:30:34,477 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:34,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:34,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1593829637, now seen corresponding path program 28 times [2020-10-23 20:30:34,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:34,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992174499] [2020-10-23 20:30:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:34,481 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:34,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:34,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:30:34,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:34,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:34,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:34,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:34,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:34,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:35,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:35,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:35,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:35,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:35,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:35,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:35,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:35,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:35,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:35,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:35,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:36,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:36,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:36,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:36,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:36,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:36,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:37,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:37,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:37,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:37,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:37,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:37,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:38,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:38,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:38,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:38,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:38,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:39,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:39,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:39,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:39,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1190 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2020-10-23 20:30:40,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992174499] [2020-10-23 20:30:40,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:40,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-10-23 20:30:40,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603121288] [2020-10-23 20:30:40,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-23 20:30:40,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:40,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-23 20:30:40,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=3906, Unknown=0, NotChecked=0, Total=4032 [2020-10-23 20:30:40,780 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand 64 states. [2020-10-23 20:31:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:31:03,078 INFO L93 Difference]: Finished difference Result 182 states and 183 transitions. [2020-10-23 20:31:03,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-10-23 20:31:03,079 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 252 [2020-10-23 20:31:03,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:31:03,081 INFO L225 Difference]: With dead ends: 182 [2020-10-23 20:31:03,081 INFO L226 Difference]: Without dead ends: 175 [2020-10-23 20:31:03,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3977 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=747, Invalid=22815, Unknown=0, NotChecked=0, Total=23562 [2020-10-23 20:31:03,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-23 20:31:03,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2020-10-23 20:31:03,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-23 20:31:03,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2020-10-23 20:31:03,132 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 252 [2020-10-23 20:31:03,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:31:03,133 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2020-10-23 20:31:03,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-23 20:31:03,133 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2020-10-23 20:31:03,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-10-23 20:31:03,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:31:03,135 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:31:03,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-23 20:31:03,135 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:31:03,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:31:03,135 INFO L82 PathProgramCache]: Analyzing trace with hash 874737199, now seen corresponding path program 29 times [2020-10-23 20:31:03,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:31:03,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016466359] [2020-10-23 20:31:03,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:31:03,139 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:31:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:03,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:31:03,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:03,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:31:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:03,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:03,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:03,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:03,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:03,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:03,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:03,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:04,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:04,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:04,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:04,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:04,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:04,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:04,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:04,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:04,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:04,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:05,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:05,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:05,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:05,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:05,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:05,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:06,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:06,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:06,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:06,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:06,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:07,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:07,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:07,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:07,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:07,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:08,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:08,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:08,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:09,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:09,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:10,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1276 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2020-10-23 20:31:10,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016466359] [2020-10-23 20:31:10,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:31:10,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2020-10-23 20:31:10,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339764295] [2020-10-23 20:31:10,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-23 20:31:10,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:31:10,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-23 20:31:10,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=4160, Unknown=0, NotChecked=0, Total=4290 [2020-10-23 20:31:10,363 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 66 states. [2020-10-23 20:31:36,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:31:36,019 INFO L93 Difference]: Finished difference Result 187 states and 188 transitions. [2020-10-23 20:31:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-10-23 20:31:36,021 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 260 [2020-10-23 20:31:36,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:31:36,024 INFO L225 Difference]: With dead ends: 187 [2020-10-23 20:31:36,024 INFO L226 Difference]: Without dead ends: 180 [2020-10-23 20:31:36,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4249 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=772, Invalid=24350, Unknown=0, NotChecked=0, Total=25122 [2020-10-23 20:31:36,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-23 20:31:36,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-10-23 20:31:36,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-23 20:31:36,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2020-10-23 20:31:36,082 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 260 [2020-10-23 20:31:36,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:31:36,082 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2020-10-23 20:31:36,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-23 20:31:36,083 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2020-10-23 20:31:36,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2020-10-23 20:31:36,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:31:36,085 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:31:36,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-23 20:31:36,085 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:31:36,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:31:36,085 INFO L82 PathProgramCache]: Analyzing trace with hash 390264645, now seen corresponding path program 30 times [2020-10-23 20:31:36,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:31:36,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1073833808] [2020-10-23 20:31:36,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:31:36,090 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:31:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:36,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:31:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:36,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-23 20:31:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:36,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:36,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:36,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:36,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:36,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:37,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:37,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:37,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:37,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:37,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:37,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:38,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:38,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:38,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:38,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:38,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:38,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:39,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:39,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:39,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:39,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:39,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:39,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:39,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:40,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:40,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:40,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:40,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:40,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:40,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:40,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:40,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:41,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:41,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:41,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:41,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:42,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:42,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:42,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1365 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1365 trivial. 0 not checked. [2020-10-23 20:31:42,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1073833808] [2020-10-23 20:31:42,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:31:42,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2020-10-23 20:31:42,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542169166] [2020-10-23 20:31:42,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-23 20:31:42,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:31:42,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-23 20:31:42,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=972, Invalid=3450, Unknown=0, NotChecked=0, Total=4422 [2020-10-23 20:31:42,959 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 67 states. [2020-10-23 20:32:00,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:32:00,526 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2020-10-23 20:32:00,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-10-23 20:32:00,527 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 268 [2020-10-23 20:32:00,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:32:00,528 INFO L225 Difference]: With dead ends: 180 [2020-10-23 20:32:00,528 INFO L226 Difference]: Without dead ends: 0 [2020-10-23 20:32:00,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3674 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=5221, Invalid=20861, Unknown=0, NotChecked=0, Total=26082 [2020-10-23 20:32:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-23 20:32:00,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-23 20:32:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-23 20:32:00,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-23 20:32:00,531 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 268 [2020-10-23 20:32:00,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:32:00,531 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-23 20:32:00,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-23 20:32:00,531 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-23 20:32:00,531 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-23 20:32:00,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-23 20:32:00,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-23 20:32:02,858 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification. DAG size of input: 1867 DAG size of output: 157 [2020-10-23 20:32:03,030 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 1432 [2020-10-23 20:32:04,856 WARN L193 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 1805 DAG size of output: 156 [2020-10-23 20:32:04,978 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 1399 [2020-10-23 20:32:07,890 WARN L193 SmtUtils]: Spent 2.90 s on a formula simplification. DAG size of input: 3087 DAG size of output: 245 [2020-10-23 20:32:08,044 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 2652 [2020-10-23 20:32:09,503 WARN L193 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 1867 DAG size of output: 157 [2020-10-23 20:32:09,618 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 1432 [2020-10-23 20:32:10,784 WARN L193 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 1805 DAG size of output: 156 [2020-10-23 20:32:11,749 WARN L193 SmtUtils]: Spent 849.00 ms on a formula simplification. DAG size of input: 1455 DAG size of output: 17 [2020-10-23 20:32:12,127 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 13 [2020-10-23 20:32:12,405 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 9 [2020-10-23 20:32:12,702 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 9 [2020-10-23 20:32:13,567 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 1421 DAG size of output: 19 [2020-10-23 20:32:15,118 WARN L193 SmtUtils]: Spent 1.54 s on a formula simplification. DAG size of input: 2674 DAG size of output: 32 [2020-10-23 20:32:15,885 WARN L193 SmtUtils]: Spent 743.00 ms on a formula simplification. DAG size of input: 1455 DAG size of output: 17 [2020-10-23 20:32:16,725 WARN L193 SmtUtils]: Spent 788.00 ms on a formula simplification. DAG size of input: 1421 DAG size of output: 19 [2020-10-23 20:32:16,991 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 9 [2020-10-23 20:32:16,996 INFO L277 CegarLoopResult]: At program point reach_errorEXIT(line 3) the Hoare annotation is: true [2020-10-23 20:32:16,996 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 3) the Hoare annotation is: true [2020-10-23 20:32:16,996 INFO L277 CegarLoopResult]: At program point reach_errorFINAL(line 3) the Hoare annotation is: true [2020-10-23 20:32:16,996 INFO L277 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) the Hoare annotation is: true [2020-10-23 20:32:16,997 INFO L277 CegarLoopResult]: At program point L3-2(line 3) the Hoare annotation is: true [2020-10-23 20:32:16,997 INFO L277 CegarLoopResult]: At program point L3-3(line 3) the Hoare annotation is: true [2020-10-23 20:32:16,997 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 20:32:16,997 INFO L277 CegarLoopResult]: At program point L3-4(line 3) the Hoare annotation is: true [2020-10-23 20:32:16,997 INFO L277 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-10-23 20:32:16,997 INFO L277 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 3) the Hoare annotation is: true [2020-10-23 20:32:16,997 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-10-23 20:32:16,998 INFO L277 CegarLoopResult]: At program point L3(line 3) the Hoare annotation is: true [2020-10-23 20:32:16,998 INFO L277 CegarLoopResult]: At program point L3-1(line 3) the Hoare annotation is: true [2020-10-23 20:32:16,998 INFO L277 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-10-23 20:32:16,998 INFO L270 CegarLoopResult]: At program point hanoiEXIT(lines 18 23) the Hoare annotation is: (let ((.cse0 (= hanoi_~n |hanoi_#in~n|))) (or (and .cse0 (<= 2147483647 |hanoi_#res|)) (and .cse0 (<= (+ |hanoi_#in~n| 1) |hanoi_#res|) (<= 3 |hanoi_#res|)) (and (= |hanoi_#in~n| 1) .cse0 (= |hanoi_#res| 1)))) [2020-10-23 20:32:16,998 INFO L277 CegarLoopResult]: At program point hanoiENTRY(lines 18 23) the Hoare annotation is: true [2020-10-23 20:32:16,998 INFO L270 CegarLoopResult]: At program point hanoiFINAL(lines 18 23) the Hoare annotation is: (let ((.cse0 (= hanoi_~n |hanoi_#in~n|))) (or (and .cse0 (<= 2147483647 |hanoi_#res|)) (and .cse0 (<= (+ |hanoi_#in~n| 1) |hanoi_#res|) (<= 3 |hanoi_#res|)) (and (= |hanoi_#in~n| 1) .cse0 (= |hanoi_#res| 1)))) [2020-10-23 20:32:16,998 INFO L270 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (= hanoi_~n |hanoi_#in~n|) [2020-10-23 20:32:16,999 INFO L270 CegarLoopResult]: At program point L22-1(line 22) the Hoare annotation is: (let ((.cse0 (= hanoi_~n |hanoi_#in~n|))) (or (and (<= |hanoi_#in~n| 2) .cse0 (= |hanoi_#t~ret7| 1)) (and .cse0 (<= 1073741823 |hanoi_#t~ret7|)) (and .cse0 (<= 3 |hanoi_#t~ret7|) (<= (+ |hanoi_#in~n| 3) (* 2 |hanoi_#t~ret7|))))) [2020-10-23 20:32:16,999 INFO L270 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (and (= |hanoi_#in~n| 1) (= hanoi_~n |hanoi_#in~n|)) [2020-10-23 20:32:16,999 INFO L270 CegarLoopResult]: At program point L22-2(line 22) the Hoare annotation is: (let ((.cse0 (= hanoi_~n |hanoi_#in~n|))) (or (and (<= |hanoi_#in~n| 2) .cse0 (= |hanoi_#t~ret7| 1)) (and .cse0 (<= 1073741823 |hanoi_#t~ret7|)) (and .cse0 (<= 3 |hanoi_#t~ret7|) (<= (+ |hanoi_#in~n| 3) (* 2 |hanoi_#t~ret7|))))) [2020-10-23 20:32:16,999 INFO L270 CegarLoopResult]: At program point L19(lines 19 21) the Hoare annotation is: (= hanoi_~n |hanoi_#in~n|) [2020-10-23 20:32:16,999 INFO L270 CegarLoopResult]: At program point L22-3(line 22) the Hoare annotation is: (and (or (and (= |hanoi_#t~ret7| 1) (<= 3 |hanoi_#res|)) (and (<= 3 |hanoi_#t~ret7|) (<= 7 |hanoi_#res|))) (let ((.cse0 (= hanoi_~n |hanoi_#in~n|))) (or (and (<= |hanoi_#in~n| 2) .cse0) (and .cse0 (<= 1073741823 |hanoi_#t~ret7|) (<= 2147483647 |hanoi_#res|)) (and .cse0 (<= (+ |hanoi_#in~n| 4) |hanoi_#res|) (<= (+ |hanoi_#in~n| 3) (* 2 |hanoi_#t~ret7|)))))) [2020-10-23 20:32:16,999 INFO L277 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-10-23 20:32:17,000 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-23 20:32:17,000 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-23 20:32:17,000 INFO L277 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-10-23 20:32:17,000 INFO L277 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: true [2020-10-23 20:32:17,000 INFO L270 CegarLoopResult]: At program point L32(lines 32 36) the Hoare annotation is: (or (and (= main_~result~0 1) (<= main_~n~0 1)) (<= (+ main_~n~0 1) main_~result~0)) [2020-10-23 20:32:17,000 INFO L270 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (<= main_~n~0 31) [2020-10-23 20:32:17,000 INFO L270 CegarLoopResult]: At program point L31-1(line 31) the Hoare annotation is: (or (<= (+ main_~n~0 1) |main_#t~ret9|) (and (<= main_~n~0 1) (= |main_#t~ret9| 1))) [2020-10-23 20:32:17,000 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 26 37) the Hoare annotation is: true [2020-10-23 20:32:17,001 INFO L277 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: true [2020-10-23 20:32:17,001 INFO L270 CegarLoopResult]: At program point L31-2(line 31) the Hoare annotation is: (or (<= (+ main_~n~0 1) |main_#t~ret9|) (and (<= main_~n~0 1) (= |main_#t~ret9| 1))) [2020-10-23 20:32:17,001 INFO L277 CegarLoopResult]: At program point L28(lines 28 30) the Hoare annotation is: true [2020-10-23 20:32:17,001 INFO L270 CegarLoopResult]: At program point L31-3(line 31) the Hoare annotation is: (or (and (= main_~result~0 1) (<= main_~n~0 1) (= |main_#t~ret9| 1)) (let ((.cse0 (+ main_~n~0 1))) (and (<= .cse0 |main_#t~ret9|) (<= .cse0 main_~result~0)))) [2020-10-23 20:32:17,001 INFO L277 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: true [2020-10-23 20:32:17,001 INFO L277 CegarLoopResult]: At program point L27-1(line 27) the Hoare annotation is: true [2020-10-23 20:32:17,001 INFO L277 CegarLoopResult]: At program point mainEXIT(lines 26 37) the Hoare annotation is: true [2020-10-23 20:32:17,001 INFO L277 CegarLoopResult]: At program point mainFINAL(lines 26 37) the Hoare annotation is: true [2020-10-23 20:32:17,001 INFO L270 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: false [2020-10-23 20:32:17,001 INFO L270 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: false [2020-10-23 20:32:17,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:32:17 BoogieIcfgContainer [2020-10-23 20:32:17,020 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:32:17,021 INFO L168 Benchmark]: Toolchain (without parser) took 357801.65 ms. Allocated memory was 151.0 MB in the beginning and 544.2 MB in the end (delta: 393.2 MB). Free memory was 127.1 MB in the beginning and 382.0 MB in the end (delta: -254.9 MB). Peak memory consumption was 381.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:32:17,022 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 125.8 MB. Free memory was 103.1 MB in the beginning and 103.0 MB in the end (delta: 68.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:32:17,022 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.64 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 117.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:32:17,023 INFO L168 Benchmark]: Boogie Preprocessor took 57.11 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 116.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:32:17,023 INFO L168 Benchmark]: RCFGBuilder took 543.10 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 102.6 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:32:17,024 INFO L168 Benchmark]: TraceAbstraction took 356931.42 ms. Allocated memory was 151.0 MB in the beginning and 544.2 MB in the end (delta: 393.2 MB). Free memory was 102.1 MB in the beginning and 382.0 MB in the end (delta: -279.8 MB). Peak memory consumption was 355.9 MB. Max. memory is 8.0 GB. [2020-10-23 20:32:17,026 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 125.8 MB. Free memory was 103.1 MB in the beginning and 103.0 MB in the end (delta: 68.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 254.64 ms. Allocated memory is still 151.0 MB. Free memory was 126.4 MB in the beginning and 117.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 57.11 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 116.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 543.10 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 102.6 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 356931.42 ms. Allocated memory was 151.0 MB in the beginning and 544.2 MB in the end (delta: 393.2 MB). Free memory was 102.1 MB in the beginning and 382.0 MB in the end (delta: -279.8 MB). Peak memory consumption was 355.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 3]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 18]: Procedure Contract for hanoi Derived contract for procedure hanoi: ((n == \old(n) && 2147483647 <= \result) || ((n == \old(n) && \old(n) + 1 <= \result) && 3 <= \result)) || ((\old(n) == 1 && n == \old(n)) && \result == 1) - ProcedureContractResult [Line: 26]: Procedure Contract for main Derived contract for procedure main: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 340.3s, OverallIterations: 31, TraceHistogramMax: 31, AutomataDifference: 262.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 16.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1715 SDtfs, 4909 SDslu, 13316 SDs, 0 SdLazy, 111269 SolverSat, 1116 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 69.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3750 GetRequests, 1055 SyntacticMatches, 0 SemanticMatches, 2695 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49364 ImplicationChecksByTransitivity, 203.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=180occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 31 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 42 LocationsWithAnnotation, 171 PreInvPairs, 2709 NumberOfFragments, 310 HoareAnnotationTreeSize, 171 FomulaSimplifications, 266288 FormulaSimplificationTreeSizeReduction, 10.3s HoareSimplificationTime, 42 FomulaSimplificationsInter, 34265 FormulaSimplificationTreeSizeReductionInter, 6.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...