/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-simple/id_o1000.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:27:44,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:27:44,629 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:27:44,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 20:27:44,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:27:44,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:27:44,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:27:44,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:27:44,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:27:44,726 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:27:44,748 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:27:44,756 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:27:44,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:27:44,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:27:44,760 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:27:44,763 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:27:44,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:27:44,784 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:27:44,785 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:27:44,786 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:27:44,787 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 20:27:44,810 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:27:44,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:27:44,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:27:44,814 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:27:44,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:27:44,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:27:44,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:27:44,815 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:27:44,816 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:27:44,816 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:27:44,817 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:27:44,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:27:44,817 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:27:44,818 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:27:44,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:27:44,818 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:27:44,818 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:27:44,819 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:27:44,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:27:44,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:27:44,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:27:44,820 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:27:44,820 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:27:45,205 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:27:45,249 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:27:45,252 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:27:45,253 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:27:45,254 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:27:45,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o1000.c [2020-10-23 20:27:45,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6925857ff/098f46d82c2e46b382f432ab3e1fe2f5/FLAG346ab90db [2020-10-23 20:27:45,938 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:27:45,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o1000.c [2020-10-23 20:27:45,946 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6925857ff/098f46d82c2e46b382f432ab3e1fe2f5/FLAG346ab90db [2020-10-23 20:27:46,335 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6925857ff/098f46d82c2e46b382f432ab3e1fe2f5 [2020-10-23 20:27:46,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:27:46,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:27:46,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:27:46,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:27:46,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:27:46,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:27:46" (1/1) ... [2020-10-23 20:27:46,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36e56ecb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:46, skipping insertion in model container [2020-10-23 20:27:46,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:27:46" (1/1) ... [2020-10-23 20:27:46,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:27:46,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:27:46,610 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:27:46,624 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:27:46,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:27:46,662 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:27:46,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:46 WrapperNode [2020-10-23 20:27:46,663 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:27:46,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:27:46,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:27:46,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:27:46,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:46" (1/1) ... [2020-10-23 20:27:46,679 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:46" (1/1) ... [2020-10-23 20:27:46,689 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:46" (1/1) ... [2020-10-23 20:27:46,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:46" (1/1) ... [2020-10-23 20:27:46,696 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:46" (1/1) ... [2020-10-23 20:27:46,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:46" (1/1) ... [2020-10-23 20:27:46,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:46" (1/1) ... [2020-10-23 20:27:46,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:27:46,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:27:46,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:27:46,709 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:27:46,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:46" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:27:46,791 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:27:46,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:27:46,792 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:27:46,792 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-23 20:27:46,792 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:27:46,792 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 20:27:46,793 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:27:46,793 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:27:46,793 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:27:46,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:27:46,793 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-23 20:27:46,793 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:27:46,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:27:46,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:27:46,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:27:46,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:27:46,794 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:27:46,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:27:47,039 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:27:47,039 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:27:47,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:27:47 BoogieIcfgContainer [2020-10-23 20:27:47,042 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:27:47,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:27:47,044 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:27:47,048 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:27:47,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:27:46" (1/3) ... [2020-10-23 20:27:47,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5647c5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:27:47, skipping insertion in model container [2020-10-23 20:27:47,049 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:46" (2/3) ... [2020-10-23 20:27:47,050 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5647c5db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:27:47, skipping insertion in model container [2020-10-23 20:27:47,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:27:47" (3/3) ... [2020-10-23 20:27:47,052 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o1000.c [2020-10-23 20:27:47,065 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:27:47,070 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:27:47,085 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:27:47,108 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:27:47,109 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:27:47,109 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:27:47,109 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:27:47,109 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:27:47,109 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:27:47,109 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:27:47,110 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:27:47,131 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-23 20:27:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 20:27:47,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:47,153 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] [2020-10-23 20:27:47,153 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:47,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:47,160 INFO L82 PathProgramCache]: Analyzing trace with hash -2039876327, now seen corresponding path program 1 times [2020-10-23 20:27:47,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:47,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404610162] [2020-10-23 20:27:47,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:47,241 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:47,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:47,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:47,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:47,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:47,569 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 20:27:47,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404610162] [2020-10-23 20:27:47,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:47,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:27:47,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35929913] [2020-10-23 20:27:47,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:27:47,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:47,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:27:47,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:27:47,595 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 6 states. [2020-10-23 20:27:47,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:47,894 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-23 20:27:47,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:27:47,896 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-23 20:27:47,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:47,906 INFO L225 Difference]: With dead ends: 50 [2020-10-23 20:27:47,906 INFO L226 Difference]: Without dead ends: 31 [2020-10-23 20:27:47,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:27:47,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-23 20:27:47,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-23 20:27:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-23 20:27:47,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-23 20:27:47,961 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2020-10-23 20:27:47,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:47,962 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-23 20:27:47,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:27:47,962 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-23 20:27:47,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 20:27:47,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:47,965 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] [2020-10-23 20:27:47,965 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:27:47,965 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:47,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:47,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1789799325, now seen corresponding path program 1 times [2020-10-23 20:27:47,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:47,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874955184] [2020-10-23 20:27:47,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:47,971 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:48,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:48,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:48,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:48,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:48,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:48,280 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 20:27:48,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874955184] [2020-10-23 20:27:48,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:48,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:27:48,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366130510] [2020-10-23 20:27:48,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:27:48,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:48,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:27:48,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:27:48,284 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 8 states. [2020-10-23 20:27:48,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:48,668 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-10-23 20:27:48,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:27:48,668 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-23 20:27:48,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:48,670 INFO L225 Difference]: With dead ends: 41 [2020-10-23 20:27:48,670 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 20:27:48,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-10-23 20:27:48,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 20:27:48,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-23 20:27:48,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 20:27:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-23 20:27:48,684 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-23 20:27:48,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:48,685 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-23 20:27:48,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:27:48,685 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-23 20:27:48,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 20:27:48,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:48,687 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:27:48,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:27:48,687 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:48,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:48,688 INFO L82 PathProgramCache]: Analyzing trace with hash 819538851, now seen corresponding path program 2 times [2020-10-23 20:27:48,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:48,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575191982] [2020-10-23 20:27:48,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:48,692 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:48,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:48,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:48,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:48,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:48,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:48,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:48,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:48,929 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 20:27:48,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575191982] [2020-10-23 20:27:48,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:48,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 20:27:48,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149783050] [2020-10-23 20:27:48,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 20:27:48,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:48,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 20:27:48,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:27:48,933 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2020-10-23 20:27:49,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:49,488 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-10-23 20:27:49,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 20:27:49,489 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-23 20:27:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:49,490 INFO L225 Difference]: With dead ends: 45 [2020-10-23 20:27:49,490 INFO L226 Difference]: Without dead ends: 39 [2020-10-23 20:27:49,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-10-23 20:27:49,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-23 20:27:49,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-23 20:27:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 20:27:49,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-23 20:27:49,505 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 39 [2020-10-23 20:27:49,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:49,506 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-23 20:27:49,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 20:27:49,506 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-23 20:27:49,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-23 20:27:49,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:49,508 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:27:49,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:27:49,508 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:49,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:49,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1214666029, now seen corresponding path program 3 times [2020-10-23 20:27:49,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:49,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411393568] [2020-10-23 20:27:49,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:49,514 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:49,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:49,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:49,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:49,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:49,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:49,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:49,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:49,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:49,885 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 20:27:49,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411393568] [2020-10-23 20:27:49,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:49,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 20:27:49,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399939376] [2020-10-23 20:27:49,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 20:27:49,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:49,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 20:27:49,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:27:49,888 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 12 states. [2020-10-23 20:27:50,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:50,800 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-23 20:27:50,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 20:27:50,800 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-23 20:27:50,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:50,802 INFO L225 Difference]: With dead ends: 49 [2020-10-23 20:27:50,802 INFO L226 Difference]: Without dead ends: 43 [2020-10-23 20:27:50,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-10-23 20:27:50,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-23 20:27:50,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-23 20:27:50,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-23 20:27:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-23 20:27:50,821 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 46 [2020-10-23 20:27:50,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:50,822 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-23 20:27:50,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 20:27:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-23 20:27:50,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-23 20:27:50,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:50,824 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:27:50,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:27:50,824 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:50,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:50,825 INFO L82 PathProgramCache]: Analyzing trace with hash -461443027, now seen corresponding path program 4 times [2020-10-23 20:27:50,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:50,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1328569057] [2020-10-23 20:27:50,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:50,829 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:50,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:50,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:50,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:50,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:51,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:51,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:51,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:51,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:51,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:51,181 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 20:27:51,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1328569057] [2020-10-23 20:27:51,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:51,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 20:27:51,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484490343] [2020-10-23 20:27:51,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 20:27:51,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:51,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 20:27:51,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-23 20:27:51,184 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 14 states. [2020-10-23 20:27:52,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:52,273 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-10-23 20:27:52,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 20:27:52,273 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-23 20:27:52,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:52,275 INFO L225 Difference]: With dead ends: 53 [2020-10-23 20:27:52,275 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 20:27:52,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2020-10-23 20:27:52,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 20:27:52,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-23 20:27:52,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 20:27:52,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-23 20:27:52,295 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 53 [2020-10-23 20:27:52,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:52,296 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-23 20:27:52,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 20:27:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-23 20:27:52,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-23 20:27:52,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:52,298 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:27:52,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:27:52,298 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:52,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:52,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1951577079, now seen corresponding path program 5 times [2020-10-23 20:27:52,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:52,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109926547] [2020-10-23 20:27:52,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:52,303 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:52,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:52,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:52,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:52,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:52,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:52,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:52,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:52,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:52,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:52,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:52,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:52,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:52,856 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 20:27:52,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109926547] [2020-10-23 20:27:52,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:52,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-23 20:27:52,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114612087] [2020-10-23 20:27:52,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 20:27:52,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:52,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 20:27:52,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:27:52,861 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 16 states. [2020-10-23 20:27:54,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:54,177 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2020-10-23 20:27:54,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 20:27:54,178 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-23 20:27:54,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:54,179 INFO L225 Difference]: With dead ends: 57 [2020-10-23 20:27:54,180 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 20:27:54,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 20:27:54,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 20:27:54,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-23 20:27:54,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-23 20:27:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-23 20:27:54,212 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 60 [2020-10-23 20:27:54,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:54,213 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-23 20:27:54,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 20:27:54,213 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-23 20:27:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 20:27:54,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:54,216 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 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] [2020-10-23 20:27:54,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 20:27:54,217 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:54,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:54,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1085586761, now seen corresponding path program 6 times [2020-10-23 20:27:54,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:54,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345450426] [2020-10-23 20:27:54,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:54,225 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:54,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:54,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:54,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:54,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:54,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:54,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:54,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:54,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:54,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:54,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:54,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:54,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:54,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:54,788 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 20:27:54,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345450426] [2020-10-23 20:27:54,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:54,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-23 20:27:54,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839504271] [2020-10-23 20:27:54,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 20:27:54,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:54,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 20:27:54,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-23 20:27:54,791 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-10-23 20:27:56,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:56,284 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-23 20:27:56,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 20:27:56,285 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-10-23 20:27:56,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:56,288 INFO L225 Difference]: With dead ends: 61 [2020-10-23 20:27:56,288 INFO L226 Difference]: Without dead ends: 55 [2020-10-23 20:27:56,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 20:27:56,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-23 20:27:56,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-23 20:27:56,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-23 20:27:56,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-23 20:27:56,304 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 67 [2020-10-23 20:27:56,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:56,304 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-23 20:27:56,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 20:27:56,305 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-23 20:27:56,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-23 20:27:56,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:56,306 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:27:56,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 20:27:56,307 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:56,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:56,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1506086719, now seen corresponding path program 7 times [2020-10-23 20:27:56,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:56,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229445628] [2020-10-23 20:27:56,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:56,312 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:56,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:56,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:56,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:56,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:56,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,858 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 20:27:56,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229445628] [2020-10-23 20:27:56,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:56,860 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-23 20:27:56,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385650774] [2020-10-23 20:27:56,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 20:27:56,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:56,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 20:27:56,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-23 20:27:56,862 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 20 states. [2020-10-23 20:27:58,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:58,675 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2020-10-23 20:27:58,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-23 20:27:58,676 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2020-10-23 20:27:58,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:58,678 INFO L225 Difference]: With dead ends: 65 [2020-10-23 20:27:58,678 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 20:27:58,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2020-10-23 20:27:58,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 20:27:58,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-23 20:27:58,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 20:27:58,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-23 20:27:58,694 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 74 [2020-10-23 20:27:58,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:58,695 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-23 20:27:58,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 20:27:58,695 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-23 20:27:58,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-23 20:27:58,697 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:58,697 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 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] [2020-10-23 20:27:58,697 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 20:27:58,697 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:58,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1924014913, now seen corresponding path program 8 times [2020-10-23 20:27:58,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:58,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856112354] [2020-10-23 20:27:58,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:58,702 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:58,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:58,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:58,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:58,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:59,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:59,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:59,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:59,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:59,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:59,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:59,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:59,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:59,400 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 20:27:59,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856112354] [2020-10-23 20:27:59,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:59,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-10-23 20:27:59,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139589319] [2020-10-23 20:27:59,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 20:27:59,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:59,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 20:27:59,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-23 20:27:59,410 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 22 states. [2020-10-23 20:28:01,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:01,601 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2020-10-23 20:28:01,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-23 20:28:01,602 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 81 [2020-10-23 20:28:01,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:01,604 INFO L225 Difference]: With dead ends: 69 [2020-10-23 20:28:01,604 INFO L226 Difference]: Without dead ends: 63 [2020-10-23 20:28:01,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=180, Invalid=2270, Unknown=0, NotChecked=0, Total=2450 [2020-10-23 20:28:01,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-23 20:28:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-23 20:28:01,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-23 20:28:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-23 20:28:01,623 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 81 [2020-10-23 20:28:01,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:01,623 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-23 20:28:01,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 20:28:01,624 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-23 20:28:01,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-23 20:28:01,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:01,625 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:01,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 20:28:01,626 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:01,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:01,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1815934069, now seen corresponding path program 9 times [2020-10-23 20:28:01,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:01,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406785808] [2020-10-23 20:28:01,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:01,631 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:01,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:01,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:01,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:01,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:01,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:01,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:01,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:01,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,399 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 20:28:02,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406785808] [2020-10-23 20:28:02,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:02,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-10-23 20:28:02,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621418634] [2020-10-23 20:28:02,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 20:28:02,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:02,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 20:28:02,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-23 20:28:02,403 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 24 states. [2020-10-23 20:28:04,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:04,857 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-10-23 20:28:04,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-23 20:28:04,858 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 88 [2020-10-23 20:28:04,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:04,859 INFO L225 Difference]: With dead ends: 73 [2020-10-23 20:28:04,859 INFO L226 Difference]: Without dead ends: 67 [2020-10-23 20:28:04,862 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=199, Invalid=2771, Unknown=0, NotChecked=0, Total=2970 [2020-10-23 20:28:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-23 20:28:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-23 20:28:04,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-23 20:28:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-23 20:28:04,875 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 88 [2020-10-23 20:28:04,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:04,876 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-23 20:28:04,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 20:28:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-23 20:28:04,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-23 20:28:04,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:04,881 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 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] [2020-10-23 20:28:04,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 20:28:04,882 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:04,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:04,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1550347829, now seen corresponding path program 10 times [2020-10-23 20:28:04,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:04,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809980526] [2020-10-23 20:28:04,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:04,890 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:04,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:05,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:05,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:05,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:05,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:05,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:05,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:05,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:05,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:05,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:05,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:05,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:05,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:05,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:05,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:05,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:05,730 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 20:28:05,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809980526] [2020-10-23 20:28:05,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:05,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-10-23 20:28:05,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023233278] [2020-10-23 20:28:05,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-23 20:28:05,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:05,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-23 20:28:05,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-23 20:28:05,734 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 26 states. [2020-10-23 20:28:08,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:08,535 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2020-10-23 20:28:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-23 20:28:08,536 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 95 [2020-10-23 20:28:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:08,537 INFO L225 Difference]: With dead ends: 77 [2020-10-23 20:28:08,537 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 20:28:08,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=218, Invalid=3322, Unknown=0, NotChecked=0, Total=3540 [2020-10-23 20:28:08,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 20:28:08,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-23 20:28:08,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-23 20:28:08,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-23 20:28:08,553 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 95 [2020-10-23 20:28:08,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:08,554 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-23 20:28:08,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-23 20:28:08,554 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-23 20:28:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-23 20:28:08,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:08,556 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:08,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 20:28:08,556 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:08,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:08,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1156643755, now seen corresponding path program 11 times [2020-10-23 20:28:08,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:08,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701204108] [2020-10-23 20:28:08,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:08,564 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:08,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:08,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:08,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:08,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:08,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:09,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:09,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:09,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:09,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:09,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:09,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:09,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:09,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:09,666 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 20:28:09,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701204108] [2020-10-23 20:28:09,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:09,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-10-23 20:28:09,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339454803] [2020-10-23 20:28:09,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-23 20:28:09,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:09,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-23 20:28:09,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-23 20:28:09,670 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 28 states. [2020-10-23 20:28:12,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:12,850 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2020-10-23 20:28:12,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-23 20:28:12,851 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 102 [2020-10-23 20:28:12,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:12,852 INFO L225 Difference]: With dead ends: 81 [2020-10-23 20:28:12,852 INFO L226 Difference]: Without dead ends: 75 [2020-10-23 20:28:12,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=237, Invalid=3923, Unknown=0, NotChecked=0, Total=4160 [2020-10-23 20:28:12,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-23 20:28:12,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-23 20:28:12,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-23 20:28:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-23 20:28:12,868 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 102 [2020-10-23 20:28:12,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:12,868 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-23 20:28:12,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-23 20:28:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-23 20:28:12,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-23 20:28:12,870 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:12,870 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 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] [2020-10-23 20:28:12,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 20:28:12,870 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:12,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:12,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1249349205, now seen corresponding path program 12 times [2020-10-23 20:28:12,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:12,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1118858328] [2020-10-23 20:28:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:12,876 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:12,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:12,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:13,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:13,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:13,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:13,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:13,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,003 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 20:28:14,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1118858328] [2020-10-23 20:28:14,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:14,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-10-23 20:28:14,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262837678] [2020-10-23 20:28:14,005 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-23 20:28:14,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:14,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-23 20:28:14,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-23 20:28:14,007 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 30 states. [2020-10-23 20:28:17,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:17,645 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-10-23 20:28:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-23 20:28:17,646 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 109 [2020-10-23 20:28:17,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:17,647 INFO L225 Difference]: With dead ends: 85 [2020-10-23 20:28:17,648 INFO L226 Difference]: Without dead ends: 79 [2020-10-23 20:28:17,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=256, Invalid=4574, Unknown=0, NotChecked=0, Total=4830 [2020-10-23 20:28:17,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-23 20:28:17,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-23 20:28:17,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-23 20:28:17,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-23 20:28:17,664 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 109 [2020-10-23 20:28:17,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:17,664 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-23 20:28:17,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-23 20:28:17,665 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-23 20:28:17,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-23 20:28:17,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:17,666 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:17,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 20:28:17,667 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:17,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:17,667 INFO L82 PathProgramCache]: Analyzing trace with hash 46324511, now seen corresponding path program 13 times [2020-10-23 20:28:17,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:17,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847970480] [2020-10-23 20:28:17,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:17,673 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:17,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:17,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,845 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 20:28:18,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847970480] [2020-10-23 20:28:18,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:18,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-10-23 20:28:18,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042983545] [2020-10-23 20:28:18,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-23 20:28:18,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:18,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-23 20:28:18,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-23 20:28:18,848 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 32 states. [2020-10-23 20:28:22,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:22,913 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2020-10-23 20:28:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-23 20:28:22,914 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 116 [2020-10-23 20:28:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:22,916 INFO L225 Difference]: With dead ends: 89 [2020-10-23 20:28:22,916 INFO L226 Difference]: Without dead ends: 83 [2020-10-23 20:28:22,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=275, Invalid=5275, Unknown=0, NotChecked=0, Total=5550 [2020-10-23 20:28:22,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-23 20:28:22,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-23 20:28:22,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-23 20:28:22,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-23 20:28:22,939 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 116 [2020-10-23 20:28:22,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:22,940 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-23 20:28:22,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-23 20:28:22,940 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-23 20:28:22,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-23 20:28:22,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:22,943 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 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] [2020-10-23 20:28:22,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 20:28:22,943 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:22,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:22,944 INFO L82 PathProgramCache]: Analyzing trace with hash 322836703, now seen corresponding path program 14 times [2020-10-23 20:28:22,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:22,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885372413] [2020-10-23 20:28:22,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:22,951 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:23,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:23,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:24,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:24,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:24,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:24,345 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 20:28:24,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885372413] [2020-10-23 20:28:24,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:24,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-10-23 20:28:24,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852842444] [2020-10-23 20:28:24,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-23 20:28:24,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:24,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-23 20:28:24,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 20:28:24,348 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 34 states. [2020-10-23 20:28:28,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:28,858 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2020-10-23 20:28:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-23 20:28:28,859 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 123 [2020-10-23 20:28:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:28,861 INFO L225 Difference]: With dead ends: 93 [2020-10-23 20:28:28,861 INFO L226 Difference]: Without dead ends: 87 [2020-10-23 20:28:28,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=294, Invalid=6026, Unknown=0, NotChecked=0, Total=6320 [2020-10-23 20:28:28,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-23 20:28:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-23 20:28:28,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-23 20:28:28,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-23 20:28:28,874 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 123 [2020-10-23 20:28:28,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:28,874 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-23 20:28:28,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-23 20:28:28,875 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-23 20:28:28,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-23 20:28:28,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:28,876 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:28,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 20:28:28,877 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:28,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:28,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1510117353, now seen corresponding path program 15 times [2020-10-23 20:28:28,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:28,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463564467] [2020-10-23 20:28:28,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:28,884 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:28,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:28,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:29,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:29,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:29,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:29,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:30,357 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 20:28:30,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463564467] [2020-10-23 20:28:30,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:30,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-10-23 20:28:30,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517995592] [2020-10-23 20:28:30,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-23 20:28:30,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:30,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-23 20:28:30,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 20:28:30,360 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 36 states. [2020-10-23 20:28:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:35,394 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-10-23 20:28:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-23 20:28:35,395 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 130 [2020-10-23 20:28:35,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:35,397 INFO L225 Difference]: With dead ends: 97 [2020-10-23 20:28:35,397 INFO L226 Difference]: Without dead ends: 91 [2020-10-23 20:28:35,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=313, Invalid=6827, Unknown=0, NotChecked=0, Total=7140 [2020-10-23 20:28:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-23 20:28:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-23 20:28:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-23 20:28:35,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-23 20:28:35,414 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 130 [2020-10-23 20:28:35,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:35,415 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-23 20:28:35,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-23 20:28:35,415 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-23 20:28:35,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-23 20:28:35,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:35,418 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 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] [2020-10-23 20:28:35,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 20:28:35,419 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:35,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:35,419 INFO L82 PathProgramCache]: Analyzing trace with hash -1118097047, now seen corresponding path program 16 times [2020-10-23 20:28:35,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:35,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153930592] [2020-10-23 20:28:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:35,437 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:35,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:35,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:35,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:35,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:35,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:35,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:35,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:35,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:35,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:35,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:35,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:35,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:36,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:36,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:36,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:36,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:36,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,106 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 20:28:37,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153930592] [2020-10-23 20:28:37,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:37,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-10-23 20:28:37,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466824896] [2020-10-23 20:28:37,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-23 20:28:37,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:37,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-23 20:28:37,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 20:28:37,108 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 38 states. [2020-10-23 20:28:42,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:42,648 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2020-10-23 20:28:42,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-23 20:28:42,649 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 137 [2020-10-23 20:28:42,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:42,651 INFO L225 Difference]: With dead ends: 101 [2020-10-23 20:28:42,651 INFO L226 Difference]: Without dead ends: 95 [2020-10-23 20:28:42,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=332, Invalid=7678, Unknown=0, NotChecked=0, Total=8010 [2020-10-23 20:28:42,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-23 20:28:42,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-23 20:28:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-23 20:28:42,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-23 20:28:42,666 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 137 [2020-10-23 20:28:42,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:42,667 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-23 20:28:42,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-23 20:28:42,667 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-23 20:28:42,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-23 20:28:42,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:42,668 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:42,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 20:28:42,668 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:42,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:42,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1483874995, now seen corresponding path program 17 times [2020-10-23 20:28:42,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:42,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009758548] [2020-10-23 20:28:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:42,673 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:42,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:42,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:42,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:42,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:43,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:43,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:43,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:43,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:43,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:43,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:43,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:43,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:43,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:43,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:43,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:43,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:43,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:43,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:43,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:44,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,632 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 20:28:44,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009758548] [2020-10-23 20:28:44,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:44,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-10-23 20:28:44,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359063106] [2020-10-23 20:28:44,633 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-23 20:28:44,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:44,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-23 20:28:44,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 20:28:44,634 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 40 states. [2020-10-23 20:28:50,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:50,713 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2020-10-23 20:28:50,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-23 20:28:50,714 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 144 [2020-10-23 20:28:50,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:50,715 INFO L225 Difference]: With dead ends: 105 [2020-10-23 20:28:50,716 INFO L226 Difference]: Without dead ends: 99 [2020-10-23 20:28:50,718 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=351, Invalid=8579, Unknown=0, NotChecked=0, Total=8930 [2020-10-23 20:28:50,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-23 20:28:50,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-23 20:28:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-23 20:28:50,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-10-23 20:28:50,729 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 144 [2020-10-23 20:28:50,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:50,730 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-10-23 20:28:50,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-23 20:28:50,730 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-10-23 20:28:50,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-23 20:28:50,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:50,731 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 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] [2020-10-23 20:28:50,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 20:28:50,732 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:50,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:50,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2076104691, now seen corresponding path program 18 times [2020-10-23 20:28:50,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:50,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493629343] [2020-10-23 20:28:50,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:50,736 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:50,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:50,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:50,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:50,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:52,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:52,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:52,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:52,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:52,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:52,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:52,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:52,754 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 20:28:52,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493629343] [2020-10-23 20:28:52,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:52,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-10-23 20:28:52,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269745286] [2020-10-23 20:28:52,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-23 20:28:52,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:52,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-23 20:28:52,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-23 20:28:52,756 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 42 states. [2020-10-23 20:28:59,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:59,427 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2020-10-23 20:28:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-23 20:28:59,428 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 151 [2020-10-23 20:28:59,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:59,430 INFO L225 Difference]: With dead ends: 109 [2020-10-23 20:28:59,430 INFO L226 Difference]: Without dead ends: 103 [2020-10-23 20:28:59,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=370, Invalid=9530, Unknown=0, NotChecked=0, Total=9900 [2020-10-23 20:28:59,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-23 20:28:59,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-23 20:28:59,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-23 20:28:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-10-23 20:28:59,445 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 151 [2020-10-23 20:28:59,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:59,445 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-10-23 20:28:59,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-23 20:28:59,445 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-10-23 20:28:59,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-23 20:28:59,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:59,447 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:28:59,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 20:28:59,447 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:59,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:59,447 INFO L82 PathProgramCache]: Analyzing trace with hash -566914179, now seen corresponding path program 19 times [2020-10-23 20:28:59,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:59,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436683471] [2020-10-23 20:28:59,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:59,451 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:59,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:00,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:00,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:00,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:00,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:00,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:00,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:00,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:00,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:00,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:00,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:00,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:01,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:01,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:01,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:01,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:01,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:01,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:01,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:01,731 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 20:29:01,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436683471] [2020-10-23 20:29:01,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:01,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-10-23 20:29:01,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563648537] [2020-10-23 20:29:01,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-23 20:29:01,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:01,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-23 20:29:01,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 20:29:01,733 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 44 states. [2020-10-23 20:29:09,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:09,028 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2020-10-23 20:29:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-23 20:29:09,029 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 158 [2020-10-23 20:29:09,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:09,034 INFO L225 Difference]: With dead ends: 113 [2020-10-23 20:29:09,034 INFO L226 Difference]: Without dead ends: 107 [2020-10-23 20:29:09,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=389, Invalid=10531, Unknown=0, NotChecked=0, Total=10920 [2020-10-23 20:29:09,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-23 20:29:09,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-23 20:29:09,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-23 20:29:09,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-23 20:29:09,049 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 158 [2020-10-23 20:29:09,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:09,050 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-23 20:29:09,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-23 20:29:09,050 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-23 20:29:09,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-23 20:29:09,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:09,051 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 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] [2020-10-23 20:29:09,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 20:29:09,051 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:09,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:09,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1423510653, now seen corresponding path program 20 times [2020-10-23 20:29:09,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:09,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961054325] [2020-10-23 20:29:09,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:09,055 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:09,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:09,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:09,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:29:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:09,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:09,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:09,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:09,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:09,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:09,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:09,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:09,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:09,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:09,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:09,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:09,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:10,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:10,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:10,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:10,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:10,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:10,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:10,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:10,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:10,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:10,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:11,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:11,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:11,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:11,605 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 20:29:11,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961054325] [2020-10-23 20:29:11,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:11,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2020-10-23 20:29:11,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809129393] [2020-10-23 20:29:11,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-23 20:29:11,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:11,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-23 20:29:11,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2020-10-23 20:29:11,607 INFO L87 Difference]: Start difference. First operand 107 states and 108 transitions. Second operand 46 states. [2020-10-23 20:29:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:19,639 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2020-10-23 20:29:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-23 20:29:19,640 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 165 [2020-10-23 20:29:19,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:19,642 INFO L225 Difference]: With dead ends: 117 [2020-10-23 20:29:19,642 INFO L226 Difference]: Without dead ends: 111 [2020-10-23 20:29:19,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=408, Invalid=11582, Unknown=0, NotChecked=0, Total=11990 [2020-10-23 20:29:19,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-23 20:29:19,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-23 20:29:19,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-23 20:29:19,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2020-10-23 20:29:19,659 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 165 [2020-10-23 20:29:19,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:19,660 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2020-10-23 20:29:19,660 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-23 20:29:19,660 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2020-10-23 20:29:19,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-23 20:29:19,661 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:19,661 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:29:19,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 20:29:19,661 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:19,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:19,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1276059065, now seen corresponding path program 21 times [2020-10-23 20:29:19,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:19,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709320950] [2020-10-23 20:29:19,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:19,665 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:19,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:19,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:19,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:29:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:19,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:19,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:20,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:20,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:20,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:20,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:20,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:20,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:20,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:20,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:20,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:20,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:20,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:20,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:20,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:21,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:21,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:21,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:21,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:21,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:21,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:21,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:21,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:22,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:22,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:22,477 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 20:29:22,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709320950] [2020-10-23 20:29:22,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:22,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2020-10-23 20:29:22,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542758938] [2020-10-23 20:29:22,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-23 20:29:22,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:22,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-23 20:29:22,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=2163, Unknown=0, NotChecked=0, Total=2256 [2020-10-23 20:29:22,480 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand 48 states. [2020-10-23 20:29:31,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:31,315 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2020-10-23 20:29:31,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-23 20:29:31,317 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 172 [2020-10-23 20:29:31,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:31,318 INFO L225 Difference]: With dead ends: 121 [2020-10-23 20:29:31,318 INFO L226 Difference]: Without dead ends: 115 [2020-10-23 20:29:31,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=427, Invalid=12683, Unknown=0, NotChecked=0, Total=13110 [2020-10-23 20:29:31,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-23 20:29:31,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-23 20:29:31,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-23 20:29:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2020-10-23 20:29:31,335 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 172 [2020-10-23 20:29:31,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:31,336 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2020-10-23 20:29:31,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-23 20:29:31,336 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2020-10-23 20:29:31,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-23 20:29:31,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:31,337 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 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] [2020-10-23 20:29:31,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-23 20:29:31,338 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:31,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:31,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2103849209, now seen corresponding path program 22 times [2020-10-23 20:29:31,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:31,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326453859] [2020-10-23 20:29:31,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:31,341 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:31,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:31,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:29:31,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:31,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:31,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:31,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:31,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:31,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:31,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:32,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:32,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:32,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:32,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:32,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:32,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:32,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:32,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:32,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:32,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:32,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:32,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:33,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:33,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:33,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:33,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:34,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:34,406 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 20:29:34,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326453859] [2020-10-23 20:29:34,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:34,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2020-10-23 20:29:34,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534774988] [2020-10-23 20:29:34,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-23 20:29:34,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:34,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-23 20:29:34,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2353, Unknown=0, NotChecked=0, Total=2450 [2020-10-23 20:29:34,409 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand 50 states. [2020-10-23 20:29:43,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:43,929 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2020-10-23 20:29:43,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-23 20:29:43,932 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 179 [2020-10-23 20:29:43,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:43,933 INFO L225 Difference]: With dead ends: 125 [2020-10-23 20:29:43,934 INFO L226 Difference]: Without dead ends: 119 [2020-10-23 20:29:43,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=446, Invalid=13834, Unknown=0, NotChecked=0, Total=14280 [2020-10-23 20:29:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-23 20:29:43,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-23 20:29:43,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-23 20:29:43,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 120 transitions. [2020-10-23 20:29:43,950 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 120 transitions. Word has length 179 [2020-10-23 20:29:43,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:43,950 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 120 transitions. [2020-10-23 20:29:43,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-23 20:29:43,951 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 120 transitions. [2020-10-23 20:29:43,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-23 20:29:43,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:43,952 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:29:43,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-23 20:29:43,952 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:43,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:43,953 INFO L82 PathProgramCache]: Analyzing trace with hash 717754129, now seen corresponding path program 23 times [2020-10-23 20:29:43,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:43,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105170910] [2020-10-23 20:29:43,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:43,956 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:44,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:29:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:44,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:44,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:44,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:44,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:44,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:45,144 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 20:29:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:45,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:45,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:45,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:45,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:46,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:46,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:46,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:46,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:46,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:46,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:46,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:46,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:47,173 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 20:29:47,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105170910] [2020-10-23 20:29:47,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:47,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2020-10-23 20:29:47,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048270904] [2020-10-23 20:29:47,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-23 20:29:47,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:47,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-23 20:29:47,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2551, Unknown=0, NotChecked=0, Total=2652 [2020-10-23 20:29:47,176 INFO L87 Difference]: Start difference. First operand 119 states and 120 transitions. Second operand 52 states. [2020-10-23 20:29:57,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:57,550 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2020-10-23 20:29:57,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-23 20:29:57,551 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 186 [2020-10-23 20:29:57,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:57,552 INFO L225 Difference]: With dead ends: 129 [2020-10-23 20:29:57,553 INFO L226 Difference]: Without dead ends: 123 [2020-10-23 20:29:57,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2604 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=465, Invalid=15035, Unknown=0, NotChecked=0, Total=15500 [2020-10-23 20:29:57,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-23 20:29:57,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-23 20:29:57,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-23 20:29:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2020-10-23 20:29:57,574 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 186 [2020-10-23 20:29:57,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:57,575 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2020-10-23 20:29:57,575 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-23 20:29:57,575 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2020-10-23 20:29:57,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-23 20:29:57,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:57,576 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 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] [2020-10-23 20:29:57,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-23 20:29:57,576 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:57,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:57,577 INFO L82 PathProgramCache]: Analyzing trace with hash -764338287, now seen corresponding path program 24 times [2020-10-23 20:29:57,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:57,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356364927] [2020-10-23 20:29:57,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:57,580 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:57,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:57,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:29:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:57,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:29:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:57,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:57,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:57,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:58,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:58,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:58,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:58,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:58,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:58,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:58,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:58,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:58,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:58,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:58,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:58,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:59,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:59,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:59,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:59,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:59,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:59,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:59,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:59,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:59,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:59,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:59,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:59,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:00,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:00,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:00,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:00,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:00,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:01,193 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 20:30:01,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356364927] [2020-10-23 20:30:01,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:01,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2020-10-23 20:30:01,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096844500] [2020-10-23 20:30:01,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-23 20:30:01,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:01,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-23 20:30:01,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2757, Unknown=0, NotChecked=0, Total=2862 [2020-10-23 20:30:01,195 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 54 states. [2020-10-23 20:30:12,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:12,461 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2020-10-23 20:30:12,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-23 20:30:12,462 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 193 [2020-10-23 20:30:12,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:12,464 INFO L225 Difference]: With dead ends: 133 [2020-10-23 20:30:12,464 INFO L226 Difference]: Without dead ends: 127 [2020-10-23 20:30:12,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2825 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=484, Invalid=16286, Unknown=0, NotChecked=0, Total=16770 [2020-10-23 20:30:12,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-23 20:30:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-23 20:30:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-23 20:30:12,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2020-10-23 20:30:12,480 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 193 [2020-10-23 20:30:12,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:12,480 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2020-10-23 20:30:12,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-23 20:30:12,481 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2020-10-23 20:30:12,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-23 20:30:12,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:12,482 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:12,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-23 20:30:12,482 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:12,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:12,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1134618149, now seen corresponding path program 25 times [2020-10-23 20:30:12,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:12,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417007823] [2020-10-23 20:30:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:12,486 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:12,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:12,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:12,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:30:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:12,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:12,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:12,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:12,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:13,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:13,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:13,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:13,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:13,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:13,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:13,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:13,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:13,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:13,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:13,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:13,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:13,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:14,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:14,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:14,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:14,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:14,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:14,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:14,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:14,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:14,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:15,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:15,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:15,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:15,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:15,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:15,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:15,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:15,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:15,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:15,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:16,364 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 20:30:16,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417007823] [2020-10-23 20:30:16,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:16,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2020-10-23 20:30:16,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116974330] [2020-10-23 20:30:16,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-23 20:30:16,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:16,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-23 20:30:16,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=2971, Unknown=0, NotChecked=0, Total=3080 [2020-10-23 20:30:16,366 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand 56 states. [2020-10-23 20:30:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:28,502 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2020-10-23 20:30:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-23 20:30:28,503 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 200 [2020-10-23 20:30:28,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:28,505 INFO L225 Difference]: With dead ends: 137 [2020-10-23 20:30:28,505 INFO L226 Difference]: Without dead ends: 131 [2020-10-23 20:30:28,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3055 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=503, Invalid=17587, Unknown=0, NotChecked=0, Total=18090 [2020-10-23 20:30:28,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-23 20:30:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-23 20:30:28,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-23 20:30:28,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 132 transitions. [2020-10-23 20:30:28,525 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 132 transitions. Word has length 200 [2020-10-23 20:30:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:28,526 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 132 transitions. [2020-10-23 20:30:28,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-23 20:30:28,526 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 132 transitions. [2020-10-23 20:30:28,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-23 20:30:28,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:28,527 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 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] [2020-10-23 20:30:28,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-23 20:30:28,528 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:28,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:28,528 INFO L82 PathProgramCache]: Analyzing trace with hash 89062939, now seen corresponding path program 26 times [2020-10-23 20:30:28,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:28,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735158955] [2020-10-23 20:30:28,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:28,532 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:28,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:28,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:28,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:30:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:28,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:28,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:28,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:29,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:29,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:29,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:29,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:29,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:29,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:29,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:29,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:29,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:29,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:29,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:29,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:29,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:29,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:30,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:30,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:30,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:30,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:30,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:30,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:30,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:30,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:30,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:31,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:31,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:31,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:31,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:31,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:31,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:31,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:31,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:32,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:32,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:32,812 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 20:30:32,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735158955] [2020-10-23 20:30:32,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:32,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2020-10-23 20:30:32,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870102052] [2020-10-23 20:30:32,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-23 20:30:32,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:32,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-23 20:30:32,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=3193, Unknown=0, NotChecked=0, Total=3306 [2020-10-23 20:30:32,814 INFO L87 Difference]: Start difference. First operand 131 states and 132 transitions. Second operand 58 states. [2020-10-23 20:30:45,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:30:45,917 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2020-10-23 20:30:45,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-23 20:30:45,919 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 207 [2020-10-23 20:30:45,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:30:45,921 INFO L225 Difference]: With dead ends: 141 [2020-10-23 20:30:45,921 INFO L226 Difference]: Without dead ends: 135 [2020-10-23 20:30:45,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3294 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=522, Invalid=18938, Unknown=0, NotChecked=0, Total=19460 [2020-10-23 20:30:45,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-23 20:30:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-10-23 20:30:45,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-23 20:30:45,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2020-10-23 20:30:45,940 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 207 [2020-10-23 20:30:45,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:30:45,941 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2020-10-23 20:30:45,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-23 20:30:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2020-10-23 20:30:45,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2020-10-23 20:30:45,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:30:45,942 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:30:45,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-23 20:30:45,943 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:30:45,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:30:45,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1428553051, now seen corresponding path program 27 times [2020-10-23 20:30:45,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:30:45,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322302622] [2020-10-23 20:30:45,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:30:45,947 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:30:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:46,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:30:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:46,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:30:46,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:46,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:46,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:46,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:46,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:46,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:46,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:46,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:46,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:46,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:46,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:47,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:47,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:47,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:47,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:47,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:47,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:47,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:47,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:47,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:47,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:47,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:47,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:48,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:48,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:48,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:48,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:48,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:48,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:48,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:48,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:49,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:49,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:49,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:49,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:49,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:49,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:49,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:49,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:49,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:30:49,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:30:50,462 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 20:30:50,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322302622] [2020-10-23 20:30:50,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:30:50,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2020-10-23 20:30:50,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312124591] [2020-10-23 20:30:50,464 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-23 20:30:50,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:30:50,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-23 20:30:50,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=3423, Unknown=0, NotChecked=0, Total=3540 [2020-10-23 20:30:50,464 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand 60 states. [2020-10-23 20:31:04,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:31:04,599 INFO L93 Difference]: Finished difference Result 145 states and 146 transitions. [2020-10-23 20:31:04,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-23 20:31:04,600 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 214 [2020-10-23 20:31:04,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:31:04,601 INFO L225 Difference]: With dead ends: 145 [2020-10-23 20:31:04,601 INFO L226 Difference]: Without dead ends: 139 [2020-10-23 20:31:04,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3542 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=541, Invalid=20339, Unknown=0, NotChecked=0, Total=20880 [2020-10-23 20:31:04,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-23 20:31:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-10-23 20:31:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-23 20:31:04,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2020-10-23 20:31:04,620 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 214 [2020-10-23 20:31:04,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:31:04,621 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2020-10-23 20:31:04,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-23 20:31:04,621 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2020-10-23 20:31:04,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-23 20:31:04,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:31:04,622 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 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] [2020-10-23 20:31:04,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-23 20:31:04,623 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:31:04,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:31:04,623 INFO L82 PathProgramCache]: Analyzing trace with hash 799238821, now seen corresponding path program 28 times [2020-10-23 20:31:04,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:31:04,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034516872] [2020-10-23 20:31:04,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:31:04,627 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:31:04,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:04,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:31:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:04,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:31:04,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:04,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:04,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:05,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:05,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:05,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:05,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:05,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:05,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:05,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:05,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:05,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:05,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:05,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:06,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:06,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:06,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:06,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:06,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:06,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:06,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:06,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:06,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:07,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:07,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:07,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:07,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:07,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:07,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:07,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:07,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:07,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:07,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:08,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:08,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:08,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:08,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:08,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:08,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:09,542 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 20:31:09,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034516872] [2020-10-23 20:31:09,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:31:09,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2020-10-23 20:31:09,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612999822] [2020-10-23 20:31:09,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-23 20:31:09,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:31:09,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-23 20:31:09,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=3661, Unknown=0, NotChecked=0, Total=3782 [2020-10-23 20:31:09,544 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand 62 states. [2020-10-23 20:31:24,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:31:24,859 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2020-10-23 20:31:24,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2020-10-23 20:31:24,860 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 221 [2020-10-23 20:31:24,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:31:24,861 INFO L225 Difference]: With dead ends: 149 [2020-10-23 20:31:24,862 INFO L226 Difference]: Without dead ends: 143 [2020-10-23 20:31:24,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3799 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=560, Invalid=21790, Unknown=0, NotChecked=0, Total=22350 [2020-10-23 20:31:24,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-23 20:31:24,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-23 20:31:24,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-23 20:31:24,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2020-10-23 20:31:24,883 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 221 [2020-10-23 20:31:24,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:31:24,883 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2020-10-23 20:31:24,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-23 20:31:24,884 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2020-10-23 20:31:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-23 20:31:24,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:31:24,885 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:31:24,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-23 20:31:24,886 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:31:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:31:24,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1596143249, now seen corresponding path program 29 times [2020-10-23 20:31:24,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:31:24,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743129783] [2020-10-23 20:31:24,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:31:24,890 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:31:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:25,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:31:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:25,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:31:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:25,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:25,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:25,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:25,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:25,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:25,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:25,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:26,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:26,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:26,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:26,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:26,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:26,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:26,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:26,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:26,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:27,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:27,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:27,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:27,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:27,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:27,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:27,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:27,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:28,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:28,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:28,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:28,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:29,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:29,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:29,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:29,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:29,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:29,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:30,534 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 20:31:30,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743129783] [2020-10-23 20:31:30,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:31:30,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2020-10-23 20:31:30,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879572558] [2020-10-23 20:31:30,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-23 20:31:30,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:31:30,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-23 20:31:30,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=3907, Unknown=0, NotChecked=0, Total=4032 [2020-10-23 20:31:30,537 INFO L87 Difference]: Start difference. First operand 143 states and 144 transitions. Second operand 64 states. [2020-10-23 20:31:47,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:31:47,072 INFO L93 Difference]: Finished difference Result 153 states and 154 transitions. [2020-10-23 20:31:47,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-10-23 20:31:47,073 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 228 [2020-10-23 20:31:47,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:31:47,075 INFO L225 Difference]: With dead ends: 153 [2020-10-23 20:31:47,075 INFO L226 Difference]: Without dead ends: 147 [2020-10-23 20:31:47,079 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4065 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=579, Invalid=23291, Unknown=0, NotChecked=0, Total=23870 [2020-10-23 20:31:47,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-23 20:31:47,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-10-23 20:31:47,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-23 20:31:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2020-10-23 20:31:47,093 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 228 [2020-10-23 20:31:47,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:31:47,093 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2020-10-23 20:31:47,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-23 20:31:47,093 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2020-10-23 20:31:47,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-23 20:31:47,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:31:47,095 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 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] [2020-10-23 20:31:47,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-23 20:31:47,095 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:31:47,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:31:47,096 INFO L82 PathProgramCache]: Analyzing trace with hash 425616687, now seen corresponding path program 30 times [2020-10-23 20:31:47,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:31:47,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255158177] [2020-10-23 20:31:47,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:31:47,099 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:31:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:47,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:31:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:47,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:31:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:47,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:47,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:47,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:47,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:47,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:47,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:47,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:47,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:48,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:48,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:48,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:48,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:48,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:48,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:48,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:48,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:48,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:48,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:49,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:49,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:49,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:49,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:49,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:49,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:49,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:50,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:50,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:50,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:50,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:50,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:50,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:50,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:50,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:50,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:51,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:51,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:51,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:51,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:51,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:52,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:52,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:52,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:31:52,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:31:53,003 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 20:31:53,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255158177] [2020-10-23 20:31:53,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:31:53,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2020-10-23 20:31:53,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832341489] [2020-10-23 20:31:53,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-23 20:31:53,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:31:53,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-23 20:31:53,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=4161, Unknown=0, NotChecked=0, Total=4290 [2020-10-23 20:31:53,005 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand 66 states. [2020-10-23 20:32:10,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:32:10,532 INFO L93 Difference]: Finished difference Result 157 states and 158 transitions. [2020-10-23 20:32:10,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2020-10-23 20:32:10,532 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 235 [2020-10-23 20:32:10,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:32:10,534 INFO L225 Difference]: With dead ends: 157 [2020-10-23 20:32:10,534 INFO L226 Difference]: Without dead ends: 151 [2020-10-23 20:32:10,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4340 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=598, Invalid=24842, Unknown=0, NotChecked=0, Total=25440 [2020-10-23 20:32:10,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-23 20:32:10,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-23 20:32:10,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-23 20:32:10,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2020-10-23 20:32:10,554 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 235 [2020-10-23 20:32:10,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:32:10,554 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2020-10-23 20:32:10,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-23 20:32:10,554 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2020-10-23 20:32:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-10-23 20:32:10,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:32:10,556 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:32:10,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-23 20:32:10,556 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:32:10,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:32:10,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1368092217, now seen corresponding path program 31 times [2020-10-23 20:32:10,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:32:10,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523153388] [2020-10-23 20:32:10,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:32:10,560 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:32:10,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:10,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:32:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:10,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:32:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:10,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:10,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:11,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:11,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:11,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:11,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:11,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:11,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:11,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:11,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:11,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:11,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:11,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:11,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:12,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:12,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:12,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:12,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:12,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:12,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:12,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:12,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:12,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:13,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:13,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:13,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:13,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:13,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:13,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:13,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:13,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:14,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:14,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:14,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:14,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:14,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:15,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:15,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:15,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:15,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:15,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:15,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:16,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1457 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2020-10-23 20:32:16,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523153388] [2020-10-23 20:32:16,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:32:16,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2020-10-23 20:32:16,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422877536] [2020-10-23 20:32:16,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-23 20:32:16,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:32:16,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-23 20:32:16,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=4423, Unknown=0, NotChecked=0, Total=4556 [2020-10-23 20:32:16,721 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand 68 states. [2020-10-23 20:32:35,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:32:35,385 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2020-10-23 20:32:35,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-10-23 20:32:35,386 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 242 [2020-10-23 20:32:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:32:35,388 INFO L225 Difference]: With dead ends: 161 [2020-10-23 20:32:35,388 INFO L226 Difference]: Without dead ends: 155 [2020-10-23 20:32:35,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4624 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=617, Invalid=26443, Unknown=0, NotChecked=0, Total=27060 [2020-10-23 20:32:35,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-23 20:32:35,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-10-23 20:32:35,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-23 20:32:35,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 156 transitions. [2020-10-23 20:32:35,418 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 156 transitions. Word has length 242 [2020-10-23 20:32:35,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:32:35,419 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 156 transitions. [2020-10-23 20:32:35,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-23 20:32:35,419 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 156 transitions. [2020-10-23 20:32:35,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-23 20:32:35,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:32:35,421 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 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 20:32:35,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-23 20:32:35,421 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:32:35,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:32:35,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1645220423, now seen corresponding path program 32 times [2020-10-23 20:32:35,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:32:35,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927527982] [2020-10-23 20:32:35,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:32:35,425 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:32:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:35,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:32:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:35,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:32:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:35,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:35,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:35,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:36,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:36,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:36,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:36,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:36,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:36,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:36,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:36,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:36,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:36,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:37,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:37,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:37,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:37,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:37,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:37,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:37,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:38,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:38,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:38,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:38,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:38,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:38,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:38,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:38,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:39,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:39,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:39,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:39,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:40,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:40,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:40,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:40,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:40,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:41,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:41,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:32:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:32:42,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1552 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2020-10-23 20:32:42,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927527982] [2020-10-23 20:32:42,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:32:42,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2020-10-23 20:32:42,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913699403] [2020-10-23 20:32:42,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-23 20:32:42,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:32:42,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-23 20:32:42,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=4693, Unknown=0, NotChecked=0, Total=4830 [2020-10-23 20:32:42,081 INFO L87 Difference]: Start difference. First operand 155 states and 156 transitions. Second operand 70 states. [2020-10-23 20:33:01,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:33:01,851 INFO L93 Difference]: Finished difference Result 165 states and 166 transitions. [2020-10-23 20:33:01,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-10-23 20:33:01,853 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 249 [2020-10-23 20:33:01,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:33:01,854 INFO L225 Difference]: With dead ends: 165 [2020-10-23 20:33:01,855 INFO L226 Difference]: Without dead ends: 159 [2020-10-23 20:33:01,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4917 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=636, Invalid=28094, Unknown=0, NotChecked=0, Total=28730 [2020-10-23 20:33:01,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-23 20:33:01,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2020-10-23 20:33:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-23 20:33:01,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2020-10-23 20:33:01,877 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 249 [2020-10-23 20:33:01,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:33:01,877 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2020-10-23 20:33:01,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-23 20:33:01,878 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2020-10-23 20:33:01,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-23 20:33:01,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:33:01,879 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:33:01,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-23 20:33:01,880 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:33:01,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:33:01,880 INFO L82 PathProgramCache]: Analyzing trace with hash 411693315, now seen corresponding path program 33 times [2020-10-23 20:33:01,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:33:01,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257358743] [2020-10-23 20:33:01,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:33:01,883 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:33:01,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:02,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:33:02,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:02,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:33:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:02,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:02,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:02,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:02,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:02,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:02,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:02,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:02,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:02,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:03,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:03,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:03,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:03,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:03,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:03,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:03,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:03,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:03,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:04,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:04,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:04,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:04,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:04,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:04,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:04,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:05,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:05,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:05,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:05,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:05,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:05,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:06,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:06,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:06,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:06,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:06,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:06,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:07,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:07,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:07,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:07,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:07,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:08,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:08,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1650 trivial. 0 not checked. [2020-10-23 20:33:08,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257358743] [2020-10-23 20:33:08,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:33:08,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2020-10-23 20:33:08,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236682272] [2020-10-23 20:33:08,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-23 20:33:08,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:33:08,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-23 20:33:08,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=4971, Unknown=0, NotChecked=0, Total=5112 [2020-10-23 20:33:08,868 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand 72 states. [2020-10-23 20:33:29,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:33:29,946 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2020-10-23 20:33:29,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-10-23 20:33:29,947 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 256 [2020-10-23 20:33:29,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:33:29,948 INFO L225 Difference]: With dead ends: 169 [2020-10-23 20:33:29,948 INFO L226 Difference]: Without dead ends: 163 [2020-10-23 20:33:29,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5219 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=655, Invalid=29795, Unknown=0, NotChecked=0, Total=30450 [2020-10-23 20:33:29,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-23 20:33:29,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-10-23 20:33:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-23 20:33:29,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2020-10-23 20:33:29,968 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 256 [2020-10-23 20:33:29,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:33:29,969 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2020-10-23 20:33:29,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-23 20:33:29,969 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2020-10-23 20:33:29,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2020-10-23 20:33:29,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:33:29,971 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 34, 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 20:33:29,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-23 20:33:29,971 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:33:29,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:33:29,972 INFO L82 PathProgramCache]: Analyzing trace with hash 206046275, now seen corresponding path program 34 times [2020-10-23 20:33:29,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:33:29,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395398915] [2020-10-23 20:33:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:33:29,975 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:33:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:30,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:33:30,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:30,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:33:30,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:30,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:30,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:30,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:30,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:30,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:30,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:30,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:30,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:31,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:31,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:31,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:31,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:31,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:31,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:31,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:31,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:31,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:31,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:31,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:32,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:32,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:32,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:32,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:32,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:32,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:33,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:33,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:33,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:33,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:33,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:33,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:33,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:34,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:34,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:34,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:34,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:34,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:35,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:35,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:35,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:35,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:36,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:36,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:36,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:33:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:33:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1751 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1751 trivial. 0 not checked. [2020-10-23 20:33:37,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395398915] [2020-10-23 20:33:37,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:33:37,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2020-10-23 20:33:37,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546162021] [2020-10-23 20:33:37,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-23 20:33:37,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:33:37,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-23 20:33:37,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=5257, Unknown=0, NotChecked=0, Total=5402 [2020-10-23 20:33:37,706 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand 74 states. [2020-10-23 20:34:00,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:34:00,200 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2020-10-23 20:34:00,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2020-10-23 20:34:00,201 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 263 [2020-10-23 20:34:00,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:34:00,202 INFO L225 Difference]: With dead ends: 173 [2020-10-23 20:34:00,203 INFO L226 Difference]: Without dead ends: 167 [2020-10-23 20:34:00,205 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5530 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=674, Invalid=31546, Unknown=0, NotChecked=0, Total=32220 [2020-10-23 20:34:00,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-23 20:34:00,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2020-10-23 20:34:00,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-23 20:34:00,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 168 transitions. [2020-10-23 20:34:00,219 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 168 transitions. Word has length 263 [2020-10-23 20:34:00,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:34:00,219 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 168 transitions. [2020-10-23 20:34:00,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-23 20:34:00,220 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 168 transitions. [2020-10-23 20:34:00,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2020-10-23 20:34:00,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:34:00,221 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:34:00,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-23 20:34:00,222 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:34:00,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:34:00,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1711517235, now seen corresponding path program 35 times [2020-10-23 20:34:00,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:34:00,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321193569] [2020-10-23 20:34:00,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:34:00,226 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:34:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:00,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:34:00,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:00,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:34:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:00,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:00,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:00,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:00,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:01,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:01,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:01,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:01,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:01,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:01,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:01,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:01,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:01,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:01,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:02,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:02,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:02,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:02,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:02,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:02,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:02,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:03,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:03,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:03,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:03,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:03,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:03,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:04,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:04,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:04,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:04,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:04,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:04,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:05,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:05,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:05,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:05,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:05,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:05,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:06,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:06,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:06,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:07,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:07,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:07,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:08,360 INFO L134 CoverageAnalysis]: Checked inductivity of 1855 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2020-10-23 20:34:08,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321193569] [2020-10-23 20:34:08,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:34:08,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2020-10-23 20:34:08,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397085518] [2020-10-23 20:34:08,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-23 20:34:08,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:34:08,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-23 20:34:08,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=5551, Unknown=0, NotChecked=0, Total=5700 [2020-10-23 20:34:08,362 INFO L87 Difference]: Start difference. First operand 167 states and 168 transitions. Second operand 76 states. [2020-10-23 20:34:32,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:34:32,256 INFO L93 Difference]: Finished difference Result 177 states and 178 transitions. [2020-10-23 20:34:32,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-10-23 20:34:32,258 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 270 [2020-10-23 20:34:32,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:34:32,260 INFO L225 Difference]: With dead ends: 177 [2020-10-23 20:34:32,260 INFO L226 Difference]: Without dead ends: 171 [2020-10-23 20:34:32,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5850 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=693, Invalid=33347, Unknown=0, NotChecked=0, Total=34040 [2020-10-23 20:34:32,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-23 20:34:32,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-10-23 20:34:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-23 20:34:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2020-10-23 20:34:32,281 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 270 [2020-10-23 20:34:32,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:34:32,282 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2020-10-23 20:34:32,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-23 20:34:32,282 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2020-10-23 20:34:32,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-10-23 20:34:32,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:34:32,286 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 36, 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 20:34:32,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-23 20:34:32,286 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:34:32,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:34:32,286 INFO L82 PathProgramCache]: Analyzing trace with hash -2032752435, now seen corresponding path program 36 times [2020-10-23 20:34:32,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:34:32,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206104740] [2020-10-23 20:34:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:34:32,291 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:34:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:32,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:34:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:32,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:34:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:32,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:32,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:32,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:32,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:32,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:33,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:33,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:33,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:33,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:33,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:33,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:33,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:33,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:33,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:34,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:34,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:34,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:34,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:34,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:35,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:35,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:35,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:35,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:35,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:36,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:36,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:36,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:36,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:36,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:36,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:36,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:37,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:37,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:37,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:37,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:37,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:37,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:38,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:38,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:38,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:38,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:39,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:39,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:39,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:39,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:40,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:34:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:34:41,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1962 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1962 trivial. 0 not checked. [2020-10-23 20:34:41,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206104740] [2020-10-23 20:34:41,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:34:41,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2020-10-23 20:34:41,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856958992] [2020-10-23 20:34:41,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-23 20:34:41,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:34:41,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-23 20:34:41,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=5853, Unknown=0, NotChecked=0, Total=6006 [2020-10-23 20:34:41,103 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand 78 states. [2020-10-23 20:35:06,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:06,295 INFO L93 Difference]: Finished difference Result 181 states and 182 transitions. [2020-10-23 20:35:06,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2020-10-23 20:35:06,297 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 277 [2020-10-23 20:35:06,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:06,299 INFO L225 Difference]: With dead ends: 181 [2020-10-23 20:35:06,299 INFO L226 Difference]: Without dead ends: 175 [2020-10-23 20:35:06,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6179 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=712, Invalid=35198, Unknown=0, NotChecked=0, Total=35910 [2020-10-23 20:35:06,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-23 20:35:06,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2020-10-23 20:35:06,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-23 20:35:06,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2020-10-23 20:35:06,322 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 277 [2020-10-23 20:35:06,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:06,322 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2020-10-23 20:35:06,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-23 20:35:06,322 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2020-10-23 20:35:06,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-10-23 20:35:06,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:06,324 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:35:06,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-23 20:35:06,325 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:06,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1652986007, now seen corresponding path program 37 times [2020-10-23 20:35:06,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:06,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475011962] [2020-10-23 20:35:06,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:06,329 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:06,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:06,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:35:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:06,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:06,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:06,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:06,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:07,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:07,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:07,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:07,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:07,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:07,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:07,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:08,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:08,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:08,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:08,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:08,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:08,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:08,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:08,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:08,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:08,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:09,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:09,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:09,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:09,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:09,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:09,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:10,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:10,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:10,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:10,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:10,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:10,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:11,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:11,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:11,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:11,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:11,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:12,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:12,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:12,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:12,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:12,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:13,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:13,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:13,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:13,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:13,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:14,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:14,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:14,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:14,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2072 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2020-10-23 20:35:16,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475011962] [2020-10-23 20:35:16,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:16,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2020-10-23 20:35:16,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173763143] [2020-10-23 20:35:16,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-23 20:35:16,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:16,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-23 20:35:16,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=6163, Unknown=0, NotChecked=0, Total=6320 [2020-10-23 20:35:16,041 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand 80 states. [2020-10-23 20:35:42,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:35:42,771 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2020-10-23 20:35:42,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-10-23 20:35:42,772 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 284 [2020-10-23 20:35:42,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:35:42,774 INFO L225 Difference]: With dead ends: 185 [2020-10-23 20:35:42,774 INFO L226 Difference]: Without dead ends: 179 [2020-10-23 20:35:42,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6517 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=731, Invalid=37099, Unknown=0, NotChecked=0, Total=37830 [2020-10-23 20:35:42,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-23 20:35:42,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2020-10-23 20:35:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-23 20:35:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 180 transitions. [2020-10-23 20:35:42,797 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 180 transitions. Word has length 284 [2020-10-23 20:35:42,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:35:42,797 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 180 transitions. [2020-10-23 20:35:42,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-23 20:35:42,797 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 180 transitions. [2020-10-23 20:35:42,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-10-23 20:35:42,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:35:42,799 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 38, 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 20:35:42,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-23 20:35:42,800 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:35:42,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:35:42,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1670110039, now seen corresponding path program 38 times [2020-10-23 20:35:42,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:35:42,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368626403] [2020-10-23 20:35:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:35:42,804 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:35:42,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:43,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:35:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:43,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:35:43,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:43,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:43,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:43,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:43,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:43,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:43,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:43,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:44,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:44,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:44,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:44,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:44,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:44,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:44,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:45,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:45,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:45,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:45,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:45,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:45,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:45,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:46,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:46,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:46,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:46,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:46,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:46,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:47,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:47,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:47,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:47,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:47,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:47,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:47,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:48,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:48,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:48,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:49,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:49,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:49,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:49,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:49,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:50,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:50,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:50,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:50,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:51,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:51,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:51,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:51,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:35:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:35:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2185 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2020-10-23 20:35:53,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368626403] [2020-10-23 20:35:53,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:35:53,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2020-10-23 20:35:53,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976712915] [2020-10-23 20:35:53,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-23 20:35:53,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:35:53,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-23 20:35:53,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=6481, Unknown=0, NotChecked=0, Total=6642 [2020-10-23 20:35:53,164 INFO L87 Difference]: Start difference. First operand 179 states and 180 transitions. Second operand 82 states. [2020-10-23 20:36:21,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:36:21,758 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2020-10-23 20:36:21,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2020-10-23 20:36:21,759 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 291 [2020-10-23 20:36:21,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:36:21,760 INFO L225 Difference]: With dead ends: 189 [2020-10-23 20:36:21,760 INFO L226 Difference]: Without dead ends: 183 [2020-10-23 20:36:21,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6864 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=750, Invalid=39050, Unknown=0, NotChecked=0, Total=39800 [2020-10-23 20:36:21,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-23 20:36:21,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2020-10-23 20:36:21,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-23 20:36:21,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2020-10-23 20:36:21,782 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 291 [2020-10-23 20:36:21,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:36:21,782 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2020-10-23 20:36:21,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-23 20:36:21,782 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2020-10-23 20:36:21,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-10-23 20:36:21,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:36:21,784 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:36:21,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-23 20:36:21,785 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:36:21,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:36:21,785 INFO L82 PathProgramCache]: Analyzing trace with hash -2025018015, now seen corresponding path program 39 times [2020-10-23 20:36:21,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:36:21,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880936672] [2020-10-23 20:36:21,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:36:21,789 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:36:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:22,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:36:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:22,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:36:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:22,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:22,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:22,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:22,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:22,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:22,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:23,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:23,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:23,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:23,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:23,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:23,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:23,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:24,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:24,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:24,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:24,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:24,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:25,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:25,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:25,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:25,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:25,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:25,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:26,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:26,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:26,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:26,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:26,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:26,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:26,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:27,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:27,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:27,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:27,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:27,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:28,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:28,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:28,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:28,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:29,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:29,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:29,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:29,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:30,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:30,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:30,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:31,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:31,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:31,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:31,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:36:31,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:36:33,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2301 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2301 trivial. 0 not checked. [2020-10-23 20:36:33,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880936672] [2020-10-23 20:36:33,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:36:33,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2020-10-23 20:36:33,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482350199] [2020-10-23 20:36:33,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-23 20:36:33,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:36:33,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-23 20:36:33,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=6807, Unknown=0, NotChecked=0, Total=6972 [2020-10-23 20:36:33,348 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand 84 states. [2020-10-23 20:37:04,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:37:04,165 INFO L93 Difference]: Finished difference Result 193 states and 194 transitions. [2020-10-23 20:37:04,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-10-23 20:37:04,166 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 298 [2020-10-23 20:37:04,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:37:04,168 INFO L225 Difference]: With dead ends: 193 [2020-10-23 20:37:04,168 INFO L226 Difference]: Without dead ends: 187 [2020-10-23 20:37:04,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7220 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=769, Invalid=41051, Unknown=0, NotChecked=0, Total=41820 [2020-10-23 20:37:04,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-23 20:37:04,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-10-23 20:37:04,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-23 20:37:04,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2020-10-23 20:37:04,188 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 298 [2020-10-23 20:37:04,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:37:04,189 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2020-10-23 20:37:04,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-23 20:37:04,189 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2020-10-23 20:37:04,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-23 20:37:04,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:37:04,191 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 40, 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 20:37:04,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-23 20:37:04,192 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:37:04,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:37:04,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1948804127, now seen corresponding path program 40 times [2020-10-23 20:37:04,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:37:04,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659031813] [2020-10-23 20:37:04,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:37:04,196 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:37:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:04,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:37:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:04,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:37:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:04,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:04,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:04,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:04,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:04,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:05,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:05,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:05,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:05,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:05,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:05,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:05,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:05,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:05,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:06,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:06,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:06,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:06,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:06,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:06,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:06,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:06,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:06,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:07,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:07,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:07,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:07,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:07,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:07,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:07,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:08,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:08,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:08,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:08,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:08,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:08,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:09,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:09,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:09,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:09,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:09,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:10,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:10,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:10,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:10,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:11,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:11,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:11,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:11,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:12,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:12,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:12,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:12,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:12,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:13,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:13,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:13,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:13,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:14,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:14,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:14,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:16,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2420 trivial. 0 not checked. [2020-10-23 20:37:16,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659031813] [2020-10-23 20:37:16,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:37:16,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2020-10-23 20:37:16,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463530361] [2020-10-23 20:37:16,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-23 20:37:16,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:37:16,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-23 20:37:16,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=7141, Unknown=0, NotChecked=0, Total=7310 [2020-10-23 20:37:16,345 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand 86 states. [2020-10-23 20:37:49,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:37:49,816 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2020-10-23 20:37:49,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-10-23 20:37:49,817 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 305 [2020-10-23 20:37:49,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:37:49,819 INFO L225 Difference]: With dead ends: 197 [2020-10-23 20:37:49,819 INFO L226 Difference]: Without dead ends: 191 [2020-10-23 20:37:49,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7585 ImplicationChecksByTransitivity, 27.5s TimeCoverageRelationStatistics Valid=788, Invalid=43102, Unknown=0, NotChecked=0, Total=43890 [2020-10-23 20:37:49,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-23 20:37:49,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2020-10-23 20:37:49,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-23 20:37:49,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 192 transitions. [2020-10-23 20:37:49,845 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 192 transitions. Word has length 305 [2020-10-23 20:37:49,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:37:49,845 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 192 transitions. [2020-10-23 20:37:49,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-23 20:37:49,846 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 192 transitions. [2020-10-23 20:37:49,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-23 20:37:49,847 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:37:49,848 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:37:49,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-23 20:37:49,848 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:37:49,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:37:49,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1173530667, now seen corresponding path program 41 times [2020-10-23 20:37:49,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:37:49,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259128725] [2020-10-23 20:37:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:37:49,853 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:37:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:50,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:37:50,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:50,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:37:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:50,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:50,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:50,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:50,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:50,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:50,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:51,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:51,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:51,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:51,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:51,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:51,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:51,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:51,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:51,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:52,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:52,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:52,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:52,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:52,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:53,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:53,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:53,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:53,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:53,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:54,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:54,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:54,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:54,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:54,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:54,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:54,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:55,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:55,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:55,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:55,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:55,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:55,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:56,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:56,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:56,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:56,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:56,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:57,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:57,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:57,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:57,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:58,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:58,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:59,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:59,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:59,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:37:59,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:37:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:00,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:00,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:00,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:00,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:00,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:01,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2542 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2020-10-23 20:38:02,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259128725] [2020-10-23 20:38:02,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:38:02,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2020-10-23 20:38:02,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827340313] [2020-10-23 20:38:02,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-23 20:38:02,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:38:02,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-23 20:38:02,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=7483, Unknown=0, NotChecked=0, Total=7656 [2020-10-23 20:38:02,893 INFO L87 Difference]: Start difference. First operand 191 states and 192 transitions. Second operand 88 states. [2020-10-23 20:38:38,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:38:38,930 INFO L93 Difference]: Finished difference Result 201 states and 202 transitions. [2020-10-23 20:38:38,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-10-23 20:38:38,931 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 312 [2020-10-23 20:38:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:38:38,934 INFO L225 Difference]: With dead ends: 201 [2020-10-23 20:38:38,934 INFO L226 Difference]: Without dead ends: 195 [2020-10-23 20:38:38,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7959 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=807, Invalid=45203, Unknown=0, NotChecked=0, Total=46010 [2020-10-23 20:38:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-23 20:38:38,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2020-10-23 20:38:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-23 20:38:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2020-10-23 20:38:38,968 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 312 [2020-10-23 20:38:38,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:38:38,969 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2020-10-23 20:38:38,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-23 20:38:38,969 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2020-10-23 20:38:38,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-23 20:38:38,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:38:38,971 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 42, 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 20:38:38,971 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-23 20:38:38,971 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:38:38,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:38:38,972 INFO L82 PathProgramCache]: Analyzing trace with hash -592844181, now seen corresponding path program 42 times [2020-10-23 20:38:38,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:38:38,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626544520] [2020-10-23 20:38:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:38:38,976 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:38:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:39,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:38:39,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:39,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:38:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:39,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:39,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:39,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:39,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:40,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:40,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:40,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:40,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:40,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:41,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:41,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:41,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:41,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:41,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:42,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:42,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:42,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:42,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:42,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:43,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:43,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:43,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:43,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:44,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:44,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:44,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:44,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:44,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:44,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:45,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:45,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:45,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:45,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:46,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:46,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:46,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:46,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:46,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:47,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:47,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:48,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:48,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:48,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:48,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:49,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:49,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:49,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:49,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:49,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:50,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:50,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:50,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:51,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:38:51,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:38:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2667 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2667 trivial. 0 not checked. [2020-10-23 20:38:52,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626544520] [2020-10-23 20:38:52,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:38:52,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2020-10-23 20:38:52,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909565281] [2020-10-23 20:38:52,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-10-23 20:38:52,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:38:52,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-10-23 20:38:52,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=7833, Unknown=0, NotChecked=0, Total=8010 [2020-10-23 20:38:52,971 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand 90 states. [2020-10-23 20:39:32,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:39:32,656 INFO L93 Difference]: Finished difference Result 205 states and 206 transitions. [2020-10-23 20:39:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2020-10-23 20:39:32,658 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 319 [2020-10-23 20:39:32,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:39:32,660 INFO L225 Difference]: With dead ends: 205 [2020-10-23 20:39:32,660 INFO L226 Difference]: Without dead ends: 199 [2020-10-23 20:39:32,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8342 ImplicationChecksByTransitivity, 31.8s TimeCoverageRelationStatistics Valid=826, Invalid=47354, Unknown=0, NotChecked=0, Total=48180 [2020-10-23 20:39:32,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-23 20:39:32,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2020-10-23 20:39:32,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-23 20:39:32,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2020-10-23 20:39:32,687 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 319 [2020-10-23 20:39:32,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:39:32,687 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2020-10-23 20:39:32,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-10-23 20:39:32,688 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2020-10-23 20:39:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-10-23 20:39:32,690 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:39:32,690 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 20:39:32,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-23 20:39:32,690 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:39:32,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:39:32,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1533247243, now seen corresponding path program 43 times [2020-10-23 20:39:32,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:39:32,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945361703] [2020-10-23 20:39:32,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:39:32,695 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:39:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:32,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:39:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:32,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:39:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:33,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:33,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:33,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:33,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:33,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:33,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:33,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:34,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:34,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:34,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:34,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:34,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:34,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:35,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:35,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:35,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:35,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:36,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:36,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:36,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:36,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:37,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:37,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:37,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:37,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:38,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:38,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:38,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:38,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:39,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:39,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:39,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:39,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:39,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:40,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:40,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:40,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:40,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:41,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:41,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:41,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:41,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:42,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:42,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:42,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:42,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:43,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:43,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:43,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:43,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:44,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:44,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:44,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:44,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:45,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:45,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:45,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:46,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:39:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:39:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2795 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2795 trivial. 0 not checked. [2020-10-23 20:39:48,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945361703] [2020-10-23 20:39:48,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:39:48,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2020-10-23 20:39:48,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639718669] [2020-10-23 20:39:48,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 92 states [2020-10-23 20:39:48,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:39:48,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2020-10-23 20:39:48,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=8191, Unknown=0, NotChecked=0, Total=8372 [2020-10-23 20:39:48,069 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand 92 states. [2020-10-23 20:40:30,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:40:30,857 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2020-10-23 20:40:30,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-10-23 20:40:30,859 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 326 [2020-10-23 20:40:30,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:40:30,861 INFO L225 Difference]: With dead ends: 209 [2020-10-23 20:40:30,861 INFO L226 Difference]: Without dead ends: 203 [2020-10-23 20:40:30,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8734 ImplicationChecksByTransitivity, 34.7s TimeCoverageRelationStatistics Valid=845, Invalid=49555, Unknown=0, NotChecked=0, Total=50400 [2020-10-23 20:40:30,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-23 20:40:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2020-10-23 20:40:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-23 20:40:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 204 transitions. [2020-10-23 20:40:30,880 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 204 transitions. Word has length 326 [2020-10-23 20:40:30,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:40:30,880 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 204 transitions. [2020-10-23 20:40:30,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 92 states. [2020-10-23 20:40:30,881 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 204 transitions. [2020-10-23 20:40:30,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-23 20:40:30,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:40:30,882 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 44, 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 20:40:30,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-23 20:40:30,882 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:40:30,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:40:30,883 INFO L82 PathProgramCache]: Analyzing trace with hash -2039298315, now seen corresponding path program 44 times [2020-10-23 20:40:30,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:40:30,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242367389] [2020-10-23 20:40:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:40:30,886 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:40:30,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:31,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:40:31,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:31,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:40:31,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:31,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:31,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:31,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:31,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:31,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:32,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:32,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:32,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:32,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:32,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:32,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:32,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:32,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:33,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:33,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:33,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:33,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:33,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:33,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:34,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:34,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:34,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:34,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:34,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:35,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:35,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:35,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:35,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:35,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:35,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:36,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:36,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:36,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:36,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:37,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:37,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:37,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:37,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:38,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:38,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:38,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:38,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:39,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:40:39,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:40:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat