/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_o20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 20:27:52,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 20:27:52,849 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 20:27:52,888 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 20:27:52,889 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 20:27:52,890 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 20:27:52,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 20:27:52,894 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 20:27:52,896 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 20:27:52,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 20:27:52,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 20:27:52,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 20:27:52,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 20:27:52,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 20:27:52,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 20:27:52,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 20:27:52,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 20:27:52,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 20:27:52,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 20:27:52,911 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 20:27:52,913 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 20:27:52,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 20:27:52,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 20:27:52,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 20:27:52,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 20:27:52,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 20:27:52,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 20:27:52,945 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 20:27:52,947 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 20:27:52,964 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 20:27:52,965 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 20:27:52,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 20:27:52,969 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 20:27:52,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 20:27:52,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 20:27:52,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 20:27:52,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 20:27:52,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 20:27:52,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 20:27:52,972 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 20:27:52,972 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 20:27:52,972 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 20:27:52,972 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 20:27:52,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 20:27:52,973 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 20:27:52,974 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 20:27:52,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 20:27:52,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 20:27:52,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 20:27:52,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 20:27:52,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 20:27:52,975 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 20:27:53,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 20:27:53,477 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 20:27:53,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 20:27:53,482 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 20:27:53,482 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 20:27:53,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o20.c [2020-10-23 20:27:53,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1959fa2d/900e81cd65044a8e801aa9b3fa658a2a/FLAG3f78c14e2 [2020-10-23 20:27:54,293 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 20:27:54,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_o20.c [2020-10-23 20:27:54,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1959fa2d/900e81cd65044a8e801aa9b3fa658a2a/FLAG3f78c14e2 [2020-10-23 20:27:54,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1959fa2d/900e81cd65044a8e801aa9b3fa658a2a [2020-10-23 20:27:54,672 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 20:27:54,680 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 20:27:54,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 20:27:54,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 20:27:54,688 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 20:27:54,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:27:54" (1/1) ... [2020-10-23 20:27:54,692 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a47342a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:54, skipping insertion in model container [2020-10-23 20:27:54,693 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 08:27:54" (1/1) ... [2020-10-23 20:27:54,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 20:27:54,717 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 20:27:54,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:27:54,876 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 20:27:54,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 20:27:54,908 INFO L208 MainTranslator]: Completed translation [2020-10-23 20:27:54,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:54 WrapperNode [2020-10-23 20:27:54,909 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 20:27:54,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 20:27:54,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 20:27:54,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 20:27:54,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:54" (1/1) ... [2020-10-23 20:27:54,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:54" (1/1) ... [2020-10-23 20:27:54,931 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:54" (1/1) ... [2020-10-23 20:27:54,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:54" (1/1) ... [2020-10-23 20:27:54,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:54" (1/1) ... [2020-10-23 20:27:54,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:54" (1/1) ... [2020-10-23 20:27:54,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:54" (1/1) ... [2020-10-23 20:27:54,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 20:27:54,943 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 20:27:54,943 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 20:27:54,943 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 20:27:54,944 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:54" (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 20:27:55,021 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 20:27:55,022 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 20:27:55,022 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 20:27:55,022 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-10-23 20:27:55,022 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 20:27:55,022 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 20:27:55,023 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 20:27:55,023 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 20:27:55,023 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 20:27:55,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 20:27:55,023 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-10-23 20:27:55,023 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 20:27:55,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 20:27:55,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 20:27:55,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 20:27:55,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 20:27:55,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 20:27:55,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 20:27:55,466 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 20:27:55,467 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 20:27:55,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:27:55 BoogieIcfgContainer [2020-10-23 20:27:55,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 20:27:55,473 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 20:27:55,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 20:27:55,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 20:27:55,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 08:27:54" (1/3) ... [2020-10-23 20:27:55,483 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60acd62f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:27:55, skipping insertion in model container [2020-10-23 20:27:55,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 08:27:54" (2/3) ... [2020-10-23 20:27:55,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60acd62f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 08:27:55, skipping insertion in model container [2020-10-23 20:27:55,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 08:27:55" (3/3) ... [2020-10-23 20:27:55,486 INFO L111 eAbstractionObserver]: Analyzing ICFG id_o20.c [2020-10-23 20:27:55,501 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 20:27:55,507 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 20:27:55,522 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 20:27:55,562 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 20:27:55,562 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 20:27:55,562 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 20:27:55,562 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 20:27:55,563 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 20:27:55,563 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 20:27:55,563 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 20:27:55,563 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 20:27:55,585 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-23 20:27:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-23 20:27:55,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:55,599 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 20:27:55,600 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:55,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:55,611 INFO L82 PathProgramCache]: Analyzing trace with hash -2039876327, now seen corresponding path program 1 times [2020-10-23 20:27:55,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:55,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753151031] [2020-10-23 20:27:55,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:55,718 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:56,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,188 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 20:27:56,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753151031] [2020-10-23 20:27:56,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:56,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 20:27:56,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934880186] [2020-10-23 20:27:56,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 20:27:56,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:56,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 20:27:56,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 20:27:56,219 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 6 states. [2020-10-23 20:27:56,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:56,559 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-23 20:27:56,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 20:27:56,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-10-23 20:27:56,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:56,572 INFO L225 Difference]: With dead ends: 50 [2020-10-23 20:27:56,572 INFO L226 Difference]: Without dead ends: 31 [2020-10-23 20:27:56,576 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 20:27:56,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-23 20:27:56,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-23 20:27:56,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-23 20:27:56,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-23 20:27:56,635 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 25 [2020-10-23 20:27:56,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:56,636 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-23 20:27:56,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 20:27:56,636 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-23 20:27:56,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 20:27:56,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:56,639 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 20:27:56,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 20:27:56,639 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:56,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1789799325, now seen corresponding path program 1 times [2020-10-23 20:27:56,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:56,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51491772] [2020-10-23 20:27:56,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:56,644 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:56,855 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 20:27:56,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51491772] [2020-10-23 20:27:56,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:56,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 20:27:56,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803986874] [2020-10-23 20:27:56,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 20:27:56,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:56,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 20:27:56,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-23 20:27:56,858 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 8 states. [2020-10-23 20:27:57,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:57,258 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-10-23 20:27:57,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-23 20:27:57,259 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-23 20:27:57,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:57,261 INFO L225 Difference]: With dead ends: 41 [2020-10-23 20:27:57,261 INFO L226 Difference]: Without dead ends: 35 [2020-10-23 20:27:57,263 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 20:27:57,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-23 20:27:57,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-23 20:27:57,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-23 20:27:57,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-10-23 20:27:57,276 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-10-23 20:27:57,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:57,276 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-10-23 20:27:57,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 20:27:57,276 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-10-23 20:27:57,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 20:27:57,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:57,278 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 20:27:57,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 20:27:57,279 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:57,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:57,279 INFO L82 PathProgramCache]: Analyzing trace with hash 819538851, now seen corresponding path program 2 times [2020-10-23 20:27:57,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:57,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291965269] [2020-10-23 20:27:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:57,283 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:57,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:57,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:57,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:57,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:57,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:57,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:57,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:57,527 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 20:27:57,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291965269] [2020-10-23 20:27:57,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:57,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 20:27:57,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791081167] [2020-10-23 20:27:57,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 20:27:57,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:57,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 20:27:57,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-23 20:27:57,530 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 10 states. [2020-10-23 20:27:58,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:58,046 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2020-10-23 20:27:58,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 20:27:58,047 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-23 20:27:58,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:58,048 INFO L225 Difference]: With dead ends: 45 [2020-10-23 20:27:58,049 INFO L226 Difference]: Without dead ends: 39 [2020-10-23 20:27:58,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2020-10-23 20:27:58,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-23 20:27:58,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-23 20:27:58,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 20:27:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-23 20:27:58,062 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 39 [2020-10-23 20:27:58,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:58,063 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-23 20:27:58,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 20:27:58,063 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-23 20:27:58,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-23 20:27:58,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:58,065 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 20:27:58,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 20:27:58,065 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:58,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1214666029, now seen corresponding path program 3 times [2020-10-23 20:27:58,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:58,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580812752] [2020-10-23 20:27:58,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:58,069 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:58,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:58,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:58,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:58,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:58,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:58,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:58,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:58,406 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 20:27:58,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580812752] [2020-10-23 20:27:58,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:58,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-23 20:27:58,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411306634] [2020-10-23 20:27:58,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-23 20:27:58,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:58,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-23 20:27:58,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-23 20:27:58,409 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 12 states. [2020-10-23 20:27:59,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:27:59,125 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-10-23 20:27:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-23 20:27:59,126 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-23 20:27:59,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:27:59,128 INFO L225 Difference]: With dead ends: 49 [2020-10-23 20:27:59,128 INFO L226 Difference]: Without dead ends: 43 [2020-10-23 20:27:59,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2020-10-23 20:27:59,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-23 20:27:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-23 20:27:59,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-23 20:27:59,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-23 20:27:59,149 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 46 [2020-10-23 20:27:59,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:27:59,149 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-23 20:27:59,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-23 20:27:59,150 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-23 20:27:59,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-23 20:27:59,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:27:59,152 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 20:27:59,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 20:27:59,152 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:27:59,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:27:59,153 INFO L82 PathProgramCache]: Analyzing trace with hash -461443027, now seen corresponding path program 4 times [2020-10-23 20:27:59,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:27:59,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753610219] [2020-10-23 20:27:59,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:27:59,157 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:27:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:59,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:27:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:59,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:27:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:59,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:59,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:59,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:59,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:27:59,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:27:59,466 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 20:27:59,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753610219] [2020-10-23 20:27:59,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:27:59,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-10-23 20:27:59,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660907781] [2020-10-23 20:27:59,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-23 20:27:59,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:27:59,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-23 20:27:59,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-23 20:27:59,469 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 14 states. [2020-10-23 20:28:00,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:00,336 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2020-10-23 20:28:00,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-23 20:28:00,338 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-23 20:28:00,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:00,340 INFO L225 Difference]: With dead ends: 53 [2020-10-23 20:28:00,340 INFO L226 Difference]: Without dead ends: 47 [2020-10-23 20:28:00,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2020-10-23 20:28:00,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-23 20:28:00,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-23 20:28:00,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-23 20:28:00,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-23 20:28:00,370 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 53 [2020-10-23 20:28:00,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:00,371 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-23 20:28:00,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-23 20:28:00,371 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-23 20:28:00,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-23 20:28:00,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:00,378 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 20:28:00,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 20:28:00,378 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:00,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:00,379 INFO L82 PathProgramCache]: Analyzing trace with hash 1951577079, now seen corresponding path program 5 times [2020-10-23 20:28:00,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:00,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585961645] [2020-10-23 20:28:00,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:00,385 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:00,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:00,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:00,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:00,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:00,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:00,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:00,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:00,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:00,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:00,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:00,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:00,884 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 20:28:00,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585961645] [2020-10-23 20:28:00,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:00,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-23 20:28:00,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854045048] [2020-10-23 20:28:00,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-23 20:28:00,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:00,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-23 20:28:00,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-23 20:28:00,888 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 16 states. [2020-10-23 20:28:01,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:01,949 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2020-10-23 20:28:01,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-23 20:28:01,949 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-23 20:28:01,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:01,951 INFO L225 Difference]: With dead ends: 57 [2020-10-23 20:28:01,951 INFO L226 Difference]: Without dead ends: 51 [2020-10-23 20:28:01,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2020-10-23 20:28:01,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-23 20:28:01,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-23 20:28:01,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-23 20:28:01,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-10-23 20:28:01,966 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 60 [2020-10-23 20:28:01,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:01,967 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-10-23 20:28:01,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-23 20:28:01,967 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-10-23 20:28:01,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-23 20:28:01,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:01,969 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 20:28:01,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 20:28:01,969 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:01,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:01,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1085586761, now seen corresponding path program 6 times [2020-10-23 20:28:01,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:01,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634517475] [2020-10-23 20:28:01,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:01,974 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:01,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:02,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:02,409 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 20:28:02,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634517475] [2020-10-23 20:28:02,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:02,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-10-23 20:28:02,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489409505] [2020-10-23 20:28:02,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-23 20:28:02,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:02,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-23 20:28:02,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-23 20:28:02,412 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-10-23 20:28:03,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:03,656 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-10-23 20:28:03,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-23 20:28:03,657 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2020-10-23 20:28:03,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:03,659 INFO L225 Difference]: With dead ends: 61 [2020-10-23 20:28:03,659 INFO L226 Difference]: Without dead ends: 55 [2020-10-23 20:28:03,661 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=142, Invalid=1418, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 20:28:03,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-23 20:28:03,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-23 20:28:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-23 20:28:03,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-10-23 20:28:03,689 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 67 [2020-10-23 20:28:03,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:03,689 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-10-23 20:28:03,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-23 20:28:03,689 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-10-23 20:28:03,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-23 20:28:03,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:03,693 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 20:28:03,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 20:28:03,693 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:03,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:03,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1506086719, now seen corresponding path program 7 times [2020-10-23 20:28:03,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:03,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405909675] [2020-10-23 20:28:03,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:03,698 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:03,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:03,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:03,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:03,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:03,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:03,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:04,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:04,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:04,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:04,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:04,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:04,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:04,259 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 20:28:04,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405909675] [2020-10-23 20:28:04,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:04,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-10-23 20:28:04,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229035035] [2020-10-23 20:28:04,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-23 20:28:04,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:04,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-23 20:28:04,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-23 20:28:04,261 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 20 states. [2020-10-23 20:28:05,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:05,842 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2020-10-23 20:28:05,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-23 20:28:05,842 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 74 [2020-10-23 20:28:05,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:05,843 INFO L225 Difference]: With dead ends: 65 [2020-10-23 20:28:05,844 INFO L226 Difference]: Without dead ends: 59 [2020-10-23 20:28:05,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=161, Invalid=1819, Unknown=0, NotChecked=0, Total=1980 [2020-10-23 20:28:05,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-23 20:28:05,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-23 20:28:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-23 20:28:05,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-10-23 20:28:05,869 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 74 [2020-10-23 20:28:05,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:05,870 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-10-23 20:28:05,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-23 20:28:05,871 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-10-23 20:28:05,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-23 20:28:05,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:05,878 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 20:28:05,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 20:28:05,879 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:05,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:05,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1924014913, now seen corresponding path program 8 times [2020-10-23 20:28:05,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:05,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463073254] [2020-10-23 20:28:05,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:05,886 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:06,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:06,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:06,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:06,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:06,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:06,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:06,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:06,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:06,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:06,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:06,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:06,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:06,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:06,549 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 20:28:06,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463073254] [2020-10-23 20:28:06,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:06,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2020-10-23 20:28:06,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253919563] [2020-10-23 20:28:06,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-23 20:28:06,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:06,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-23 20:28:06,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-23 20:28:06,558 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 22 states. [2020-10-23 20:28:08,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:08,327 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2020-10-23 20:28:08,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-23 20:28:08,328 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 81 [2020-10-23 20:28:08,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:08,330 INFO L225 Difference]: With dead ends: 69 [2020-10-23 20:28:08,330 INFO L226 Difference]: Without dead ends: 63 [2020-10-23 20:28:08,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=180, Invalid=2270, Unknown=0, NotChecked=0, Total=2450 [2020-10-23 20:28:08,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-23 20:28:08,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-23 20:28:08,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-23 20:28:08,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-10-23 20:28:08,346 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 81 [2020-10-23 20:28:08,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:08,347 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-10-23 20:28:08,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-23 20:28:08,347 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-10-23 20:28:08,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-23 20:28:08,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:08,351 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 20:28:08,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 20:28:08,351 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:08,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:08,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1815934069, now seen corresponding path program 9 times [2020-10-23 20:28:08,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:08,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424957848] [2020-10-23 20:28:08,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:08,364 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:08,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:08,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:08,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:08,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:08,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:09,084 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 20:28:09,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424957848] [2020-10-23 20:28:09,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:09,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2020-10-23 20:28:09,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066571677] [2020-10-23 20:28:09,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-23 20:28:09,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:09,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-23 20:28:09,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-23 20:28:09,088 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 24 states. [2020-10-23 20:28:11,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:11,195 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-10-23 20:28:11,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-23 20:28:11,195 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 88 [2020-10-23 20:28:11,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:11,198 INFO L225 Difference]: With dead ends: 73 [2020-10-23 20:28:11,198 INFO L226 Difference]: Without dead ends: 67 [2020-10-23 20:28:11,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=199, Invalid=2771, Unknown=0, NotChecked=0, Total=2970 [2020-10-23 20:28:11,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-23 20:28:11,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-23 20:28:11,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-23 20:28:11,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2020-10-23 20:28:11,214 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 88 [2020-10-23 20:28:11,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:11,214 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2020-10-23 20:28:11,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-23 20:28:11,214 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2020-10-23 20:28:11,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-23 20:28:11,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:11,216 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 20:28:11,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 20:28:11,216 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:11,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:11,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1550347829, now seen corresponding path program 10 times [2020-10-23 20:28:11,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:11,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885936989] [2020-10-23 20:28:11,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:11,222 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:11,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:11,314 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:11,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:11,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:11,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:11,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:11,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:11,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:11,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:11,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:11,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:11,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:11,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:11,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:11,993 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 20:28:11,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885936989] [2020-10-23 20:28:11,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:11,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2020-10-23 20:28:11,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915229808] [2020-10-23 20:28:11,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-23 20:28:11,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:11,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-23 20:28:11,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-23 20:28:11,995 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand 26 states. [2020-10-23 20:28:14,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:14,327 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2020-10-23 20:28:14,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-23 20:28:14,328 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 95 [2020-10-23 20:28:14,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:14,329 INFO L225 Difference]: With dead ends: 77 [2020-10-23 20:28:14,329 INFO L226 Difference]: Without dead ends: 71 [2020-10-23 20:28:14,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=218, Invalid=3322, Unknown=0, NotChecked=0, Total=3540 [2020-10-23 20:28:14,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-23 20:28:14,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-23 20:28:14,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-23 20:28:14,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2020-10-23 20:28:14,351 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 95 [2020-10-23 20:28:14,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:14,351 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2020-10-23 20:28:14,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-23 20:28:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2020-10-23 20:28:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-23 20:28:14,353 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:14,353 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 20:28:14,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 20:28:14,353 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:14,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:14,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1156643755, now seen corresponding path program 11 times [2020-10-23 20:28:14,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:14,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873703019] [2020-10-23 20:28:14,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:14,359 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:14,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:14,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:14,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:15,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:15,298 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 20:28:15,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873703019] [2020-10-23 20:28:15,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:15,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2020-10-23 20:28:15,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450271085] [2020-10-23 20:28:15,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-23 20:28:15,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:15,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-23 20:28:15,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2020-10-23 20:28:15,301 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 28 states. [2020-10-23 20:28:18,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:18,035 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2020-10-23 20:28:18,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-23 20:28:18,036 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 102 [2020-10-23 20:28:18,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:18,038 INFO L225 Difference]: With dead ends: 81 [2020-10-23 20:28:18,038 INFO L226 Difference]: Without dead ends: 75 [2020-10-23 20:28:18,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=237, Invalid=3923, Unknown=0, NotChecked=0, Total=4160 [2020-10-23 20:28:18,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-23 20:28:18,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-23 20:28:18,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-23 20:28:18,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-10-23 20:28:18,054 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 102 [2020-10-23 20:28:18,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:18,054 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-10-23 20:28:18,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-23 20:28:18,054 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-10-23 20:28:18,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-23 20:28:18,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:18,056 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 20:28:18,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 20:28:18,056 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:18,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:18,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1249349205, now seen corresponding path program 12 times [2020-10-23 20:28:18,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:18,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513784162] [2020-10-23 20:28:18,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:18,062 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,676 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 20:28:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:18,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:19,051 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 20:28:19,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513784162] [2020-10-23 20:28:19,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:19,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2020-10-23 20:28:19,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767001181] [2020-10-23 20:28:19,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-23 20:28:19,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:19,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-23 20:28:19,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2020-10-23 20:28:19,054 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 30 states. [2020-10-23 20:28:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:22,195 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-10-23 20:28:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-23 20:28:22,195 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 109 [2020-10-23 20:28:22,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:22,197 INFO L225 Difference]: With dead ends: 85 [2020-10-23 20:28:22,197 INFO L226 Difference]: Without dead ends: 79 [2020-10-23 20:28:22,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=256, Invalid=4574, Unknown=0, NotChecked=0, Total=4830 [2020-10-23 20:28:22,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-23 20:28:22,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-23 20:28:22,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-23 20:28:22,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2020-10-23 20:28:22,216 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 109 [2020-10-23 20:28:22,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:22,216 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2020-10-23 20:28:22,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-23 20:28:22,216 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2020-10-23 20:28:22,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-23 20:28:22,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:22,218 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 20:28:22,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-23 20:28:22,218 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:22,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:22,219 INFO L82 PathProgramCache]: Analyzing trace with hash 46324511, now seen corresponding path program 13 times [2020-10-23 20:28:22,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:22,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654599356] [2020-10-23 20:28:22,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:22,225 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:22,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:22,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:22,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:22,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:22,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:22,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:22,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:22,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:22,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:22,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:22,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:22,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:22,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:22,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:22,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:22,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:23,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:23,353 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 20:28:23,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654599356] [2020-10-23 20:28:23,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:23,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2020-10-23 20:28:23,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650771781] [2020-10-23 20:28:23,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-23 20:28:23,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:23,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-23 20:28:23,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2020-10-23 20:28:23,355 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand 32 states. [2020-10-23 20:28:26,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:26,786 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2020-10-23 20:28:26,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-23 20:28:26,786 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 116 [2020-10-23 20:28:26,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:26,788 INFO L225 Difference]: With dead ends: 89 [2020-10-23 20:28:26,788 INFO L226 Difference]: Without dead ends: 83 [2020-10-23 20:28:26,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=275, Invalid=5275, Unknown=0, NotChecked=0, Total=5550 [2020-10-23 20:28:26,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-23 20:28:26,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-23 20:28:26,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-23 20:28:26,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-10-23 20:28:26,809 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 116 [2020-10-23 20:28:26,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:26,810 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-10-23 20:28:26,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-23 20:28:26,810 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-10-23 20:28:26,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-23 20:28:26,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:26,812 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 20:28:26,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-23 20:28:26,812 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:26,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:26,813 INFO L82 PathProgramCache]: Analyzing trace with hash 322836703, now seen corresponding path program 14 times [2020-10-23 20:28:26,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:26,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474138651] [2020-10-23 20:28:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:26,819 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:26,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:26,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:26,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:27,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:27,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:27,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:27,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:27,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:27,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:27,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:28,111 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 20:28:28,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474138651] [2020-10-23 20:28:28,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:28,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-10-23 20:28:28,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107806892] [2020-10-23 20:28:28,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-23 20:28:28,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:28,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-23 20:28:28,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2020-10-23 20:28:28,113 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 34 states. [2020-10-23 20:28:31,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:31,935 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2020-10-23 20:28:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-23 20:28:31,935 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 123 [2020-10-23 20:28:31,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:31,936 INFO L225 Difference]: With dead ends: 93 [2020-10-23 20:28:31,936 INFO L226 Difference]: Without dead ends: 87 [2020-10-23 20:28:31,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=294, Invalid=6026, Unknown=0, NotChecked=0, Total=6320 [2020-10-23 20:28:31,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-23 20:28:31,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-23 20:28:31,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-23 20:28:31,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-10-23 20:28:31,952 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 123 [2020-10-23 20:28:31,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:31,953 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-10-23 20:28:31,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-23 20:28:31,953 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-10-23 20:28:31,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-23 20:28:31,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:31,955 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 20:28:31,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-23 20:28:31,955 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:31,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:31,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1510117353, now seen corresponding path program 15 times [2020-10-23 20:28:31,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:31,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932418034] [2020-10-23 20:28:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:31,962 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:32,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:32,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:32,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:33,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:33,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:33,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:33,410 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 20:28:33,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932418034] [2020-10-23 20:28:33,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:33,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2020-10-23 20:28:33,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716707708] [2020-10-23 20:28:33,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-23 20:28:33,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:33,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-23 20:28:33,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2020-10-23 20:28:33,413 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 36 states. [2020-10-23 20:28:37,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:37,470 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2020-10-23 20:28:37,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-23 20:28:37,471 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 130 [2020-10-23 20:28:37,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:37,473 INFO L225 Difference]: With dead ends: 97 [2020-10-23 20:28:37,473 INFO L226 Difference]: Without dead ends: 91 [2020-10-23 20:28:37,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=313, Invalid=6827, Unknown=0, NotChecked=0, Total=7140 [2020-10-23 20:28:37,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-23 20:28:37,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-23 20:28:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-23 20:28:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2020-10-23 20:28:37,489 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 130 [2020-10-23 20:28:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:37,489 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2020-10-23 20:28:37,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-23 20:28:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2020-10-23 20:28:37,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-23 20:28:37,491 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:37,491 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 20:28:37,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-23 20:28:37,492 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:37,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:37,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1118097047, now seen corresponding path program 16 times [2020-10-23 20:28:37,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:37,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151619905] [2020-10-23 20:28:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:37,501 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:37,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:37,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:37,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:37,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:37,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:38,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:38,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:38,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:38,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:38,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:38,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:38,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:38,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:38,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:38,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:38,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:38,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:38,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:38,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:38,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:38,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:38,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:38,954 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 20:28:38,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151619905] [2020-10-23 20:28:38,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:38,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2020-10-23 20:28:38,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139721508] [2020-10-23 20:28:38,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-23 20:28:38,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:38,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-23 20:28:38,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2020-10-23 20:28:38,956 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand 38 states. [2020-10-23 20:28:43,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:43,643 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2020-10-23 20:28:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-23 20:28:43,644 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 137 [2020-10-23 20:28:43,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:43,646 INFO L225 Difference]: With dead ends: 101 [2020-10-23 20:28:43,646 INFO L226 Difference]: Without dead ends: 95 [2020-10-23 20:28:43,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1309 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=332, Invalid=7678, Unknown=0, NotChecked=0, Total=8010 [2020-10-23 20:28:43,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-23 20:28:43,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-23 20:28:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-23 20:28:43,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 96 transitions. [2020-10-23 20:28:43,662 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 96 transitions. Word has length 137 [2020-10-23 20:28:43,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:43,663 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 96 transitions. [2020-10-23 20:28:43,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-23 20:28:43,663 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 96 transitions. [2020-10-23 20:28:43,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-23 20:28:43,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:43,665 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 20:28:43,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-23 20:28:43,665 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:43,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:43,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1483874995, now seen corresponding path program 17 times [2020-10-23 20:28:43,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:43,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292040933] [2020-10-23 20:28:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:43,674 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:43,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:43,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:43,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:43,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:44,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:44,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:44,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:45,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:45,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:45,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:45,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:45,550 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 20:28:45,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292040933] [2020-10-23 20:28:45,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:45,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2020-10-23 20:28:45,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816833881] [2020-10-23 20:28:45,551 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-23 20:28:45,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:45,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-23 20:28:45,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2020-10-23 20:28:45,559 INFO L87 Difference]: Start difference. First operand 95 states and 96 transitions. Second operand 40 states. [2020-10-23 20:28:50,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:50,880 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2020-10-23 20:28:50,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-23 20:28:50,883 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 144 [2020-10-23 20:28:50,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:50,885 INFO L225 Difference]: With dead ends: 105 [2020-10-23 20:28:50,885 INFO L226 Difference]: Without dead ends: 99 [2020-10-23 20:28:50,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=351, Invalid=8579, Unknown=0, NotChecked=0, Total=8930 [2020-10-23 20:28:50,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-23 20:28:50,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-23 20:28:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-23 20:28:50,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2020-10-23 20:28:50,902 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 144 [2020-10-23 20:28:50,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:50,903 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2020-10-23 20:28:50,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-23 20:28:50,903 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2020-10-23 20:28:50,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-23 20:28:50,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:50,904 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 20:28:50,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-23 20:28:50,905 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:50,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:50,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2076104691, now seen corresponding path program 18 times [2020-10-23 20:28:50,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:50,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531044589] [2020-10-23 20:28:50,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:50,918 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:51,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:51,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:51,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:52,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:52,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:52,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:52,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:52,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:52,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:52,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:52,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:52,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:52,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:52,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:52,777 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 20:28:52,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531044589] [2020-10-23 20:28:52,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:28:52,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2020-10-23 20:28:52,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071611038] [2020-10-23 20:28:52,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-23 20:28:52,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:28:52,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-23 20:28:52,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2020-10-23 20:28:52,780 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand 42 states. [2020-10-23 20:28:58,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:28:58,524 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2020-10-23 20:28:58,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-23 20:28:58,526 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 151 [2020-10-23 20:28:58,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:28:58,528 INFO L225 Difference]: With dead ends: 109 [2020-10-23 20:28:58,528 INFO L226 Difference]: Without dead ends: 103 [2020-10-23 20:28:58,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1634 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=370, Invalid=9530, Unknown=0, NotChecked=0, Total=9900 [2020-10-23 20:28:58,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-23 20:28:58,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-23 20:28:58,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-23 20:28:58,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-10-23 20:28:58,542 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 151 [2020-10-23 20:28:58,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:28:58,542 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-10-23 20:28:58,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-23 20:28:58,542 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-10-23 20:28:58,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-23 20:28:58,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:28:58,544 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 20:28:58,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-23 20:28:58,544 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:28:58,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:28:58,545 INFO L82 PathProgramCache]: Analyzing trace with hash -566914179, now seen corresponding path program 19 times [2020-10-23 20:28:58,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:28:58,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368238013] [2020-10-23 20:28:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:28:58,549 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:28:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:58,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 20:28:58,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:58,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-23 20:28:58,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:58,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:58,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:58,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:58,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:58,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:28:59,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:28:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:00,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:00,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:00,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:00,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-10-23 20:29:00,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 20:29:00,653 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 20:29:00,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368238013] [2020-10-23 20:29:00,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 20:29:00,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2020-10-23 20:29:00,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135885867] [2020-10-23 20:29:00,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-23 20:29:00,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 20:29:00,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-23 20:29:00,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2020-10-23 20:29:00,656 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 44 states. [2020-10-23 20:29:07,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 20:29:07,048 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2020-10-23 20:29:07,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-23 20:29:07,049 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 158 [2020-10-23 20:29:07,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 20:29:07,051 INFO L225 Difference]: With dead ends: 113 [2020-10-23 20:29:07,051 INFO L226 Difference]: Without dead ends: 107 [2020-10-23 20:29:07,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=389, Invalid=10531, Unknown=0, NotChecked=0, Total=10920 [2020-10-23 20:29:07,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-23 20:29:07,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-23 20:29:07,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-23 20:29:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 108 transitions. [2020-10-23 20:29:07,067 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 108 transitions. Word has length 158 [2020-10-23 20:29:07,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 20:29:07,068 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 108 transitions. [2020-10-23 20:29:07,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-23 20:29:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 108 transitions. [2020-10-23 20:29:07,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-23 20:29:07,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 20:29:07,069 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 20:29:07,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-23 20:29:07,069 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 20:29:07,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 20:29:07,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1423510653, now seen corresponding path program 20 times [2020-10-23 20:29:07,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 20:29:07,070 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657933686] [2020-10-23 20:29:07,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 20:29:07,074 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 20:29:07,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:29:07,247 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:29:07,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 20:29:07,340 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 20:29:07,406 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 20:29:07,406 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 20:29:07,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-23 20:29:07,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 08:29:07 BoogieIcfgContainer [2020-10-23 20:29:07,443 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 20:29:07,452 INFO L168 Benchmark]: Toolchain (without parser) took 72770.03 ms. Allocated memory was 125.8 MB in the beginning and 297.8 MB in the end (delta: 172.0 MB). Free memory was 103.1 MB in the beginning and 209.2 MB in the end (delta: -106.1 MB). Peak memory consumption was 66.6 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:07,453 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory was 98.0 MB in the beginning and 97.9 MB in the end (delta: 68.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 20:29:07,456 INFO L168 Benchmark]: CACSL2BoogieTranslator took 225.72 ms. Allocated memory is still 125.8 MB. Free memory was 102.5 MB in the beginning and 93.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:07,457 INFO L168 Benchmark]: Boogie Preprocessor took 31.65 ms. Allocated memory is still 125.8 MB. Free memory was 93.5 MB in the beginning and 92.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:07,457 INFO L168 Benchmark]: RCFGBuilder took 528.28 ms. Allocated memory was 125.8 MB in the beginning and 170.9 MB in the end (delta: 45.1 MB). Free memory was 92.0 MB in the beginning and 149.9 MB in the end (delta: -57.9 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:07,458 INFO L168 Benchmark]: TraceAbstraction took 71969.53 ms. Allocated memory was 170.9 MB in the beginning and 297.8 MB in the end (delta: 126.9 MB). Free memory was 149.6 MB in the beginning and 209.2 MB in the end (delta: -59.6 MB). Peak memory consumption was 67.5 MB. Max. memory is 8.0 GB. [2020-10-23 20:29:07,466 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 125.8 MB. Free memory was 98.0 MB in the beginning and 97.9 MB in the end (delta: 68.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 225.72 ms. Allocated memory is still 125.8 MB. Free memory was 102.5 MB in the beginning and 93.5 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 31.65 ms. Allocated memory is still 125.8 MB. Free memory was 93.5 MB in the beginning and 92.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 528.28 ms. Allocated memory was 125.8 MB in the beginning and 170.9 MB in the end (delta: 45.1 MB). Free memory was 92.0 MB in the beginning and 149.9 MB in the end (delta: -57.9 MB). Peak memory consumption was 11.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 71969.53 ms. Allocated memory was 170.9 MB in the beginning and 297.8 MB in the end (delta: 126.9 MB). Free memory was 149.6 MB in the beginning and 209.2 MB in the end (delta: -59.6 MB). Peak memory consumption was 67.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int input = __VERIFIER_nondet_uint(); [L13] CALL, EXPR id(input) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND FALSE !(x==0) [L8] CALL, EXPR id(x-1) [L7] COND TRUE x==0 [L7] return 0; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L8] RET, EXPR id(x-1) [L8] return id(x-1) + 1; [L13] RET, EXPR id(input) [L13] unsigned int result = id(input); [L14] COND TRUE result == 20 [L15] CALL reach_error() [L4] __assert_fail("0", "id_o20.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 71.8s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 52.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 885 SDtfs, 1106 SDslu, 6667 SDs, 0 SdLazy, 27368 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1590 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 1110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13020 ImplicationChecksByTransitivity, 43.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=107occurred in iteration=20, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...