/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_10x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:21:16,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:21:16,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:21:16,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-06 22:21:16,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:21:16,194 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:21:16,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:21:16,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:21:16,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:21:16,204 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:21:16,213 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:21:16,220 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:21:16,225 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:21:16,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:21:16,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:21:16,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:21:16,270 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:21:16,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:21:16,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:21:16,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:21:16,288 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:21:16,350 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:21:16,350 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:21:16,355 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:21:16,356 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:21:16,356 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:21:16,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:21:16,357 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:21:16,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:21:16,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:21:16,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:21:16,359 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:21:16,359 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:21:16,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:21:16,360 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:21:16,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:21:16,360 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:21:16,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:21:16,360 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:21:16,361 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:21:16,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:21:16,361 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:21:16,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:21:16,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:21:16,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:21:16,362 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:21:16,363 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:21:16,363 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:21:16,363 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:21:16,363 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:21:16,363 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:21:16,811 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:21:16,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:21:16,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:21:16,861 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:21:16,862 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:21:16,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2020-11-06 22:21:16,959 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a2711cf0/108ad7d0da6a425ab20bd1656a9978ca/FLAGaa6cab6fa [2020-11-06 22:21:17,705 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:21:17,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_10x0-2.c [2020-11-06 22:21:17,714 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a2711cf0/108ad7d0da6a425ab20bd1656a9978ca/FLAGaa6cab6fa [2020-11-06 22:21:18,041 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a2711cf0/108ad7d0da6a425ab20bd1656a9978ca [2020-11-06 22:21:18,045 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:21:18,053 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:21:18,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:21:18,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:21:18,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:21:18,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:18" (1/1) ... [2020-11-06 22:21:18,069 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73bf27c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:18, skipping insertion in model container [2020-11-06 22:21:18,069 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:21:18" (1/1) ... [2020-11-06 22:21:18,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:21:18,099 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:21:18,289 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:21:18,300 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:21:18,321 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:21:18,337 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:21:18,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:18 WrapperNode [2020-11-06 22:21:18,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:21:18,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:21:18,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:21:18,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:21:18,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:18" (1/1) ... [2020-11-06 22:21:18,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:18" (1/1) ... [2020-11-06 22:21:18,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:18" (1/1) ... [2020-11-06 22:21:18,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:18" (1/1) ... [2020-11-06 22:21:18,367 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:18" (1/1) ... [2020-11-06 22:21:18,369 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:18" (1/1) ... [2020-11-06 22:21:18,370 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:18" (1/1) ... [2020-11-06 22:21:18,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:21:18,373 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:21:18,373 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:21:18,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:21:18,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:18" (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 [2020-11-06 22:21:18,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:21:18,447 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:21:18,447 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:21:18,447 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-11-06 22:21:18,447 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:21:18,447 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:21:18,448 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:21:18,448 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:21:18,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:21:18,448 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-11-06 22:21:18,448 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:21:18,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:21:18,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:21:18,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:21:18,449 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:21:18,449 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:21:18,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:21:18,925 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:21:18,925 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:21:18,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:18 BoogieIcfgContainer [2020-11-06 22:21:18,927 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:21:18,948 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:21:18,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:21:18,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:21:18,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:21:18" (1/3) ... [2020-11-06 22:21:18,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bfddbb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:18, skipping insertion in model container [2020-11-06 22:21:18,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:21:18" (2/3) ... [2020-11-06 22:21:18,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bfddbb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:21:18, skipping insertion in model container [2020-11-06 22:21:18,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:21:18" (3/3) ... [2020-11-06 22:21:18,956 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_10x0-2.c [2020-11-06 22:21:18,984 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:21:18,992 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:21:19,035 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:21:19,078 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:21:19,078 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:21:19,078 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:21:19,079 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:21:19,079 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:21:19,079 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:21:19,079 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:21:19,079 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:21:19,107 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-11-06 22:21:19,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:21:19,117 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:19,118 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:19,119 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:19,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:19,130 INFO L82 PathProgramCache]: Analyzing trace with hash -2012080153, now seen corresponding path program 1 times [2020-11-06 22:21:19,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:19,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203464551] [2020-11-06 22:21:19,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:19,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:19,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:19,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:19,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:19,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:21:19,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203464551] [2020-11-06 22:21:19,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:21:19,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:21:19,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517980100] [2020-11-06 22:21:19,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:21:19,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:19,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:21:19,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:21:19,631 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 6 states. [2020-11-06 22:21:19,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:19,875 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-11-06 22:21:19,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:21:19,877 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-06 22:21:19,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:19,887 INFO L225 Difference]: With dead ends: 36 [2020-11-06 22:21:19,887 INFO L226 Difference]: Without dead ends: 20 [2020-11-06 22:21:19,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:21:19,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-06 22:21:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-06 22:21:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-06 22:21:19,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-06 22:21:19,942 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-11-06 22:21:19,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:19,942 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-06 22:21:19,943 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:21:19,943 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-06 22:21:19,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:21:19,945 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:19,945 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:19,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:21:19,946 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:19,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:19,947 INFO L82 PathProgramCache]: Analyzing trace with hash -292229313, now seen corresponding path program 1 times [2020-11-06 22:21:19,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:19,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928908957] [2020-11-06 22:21:19,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:20,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:20,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:20,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:20,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:20,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:21:20,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928908957] [2020-11-06 22:21:20,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224466336] [2020-11-06 22:21:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:20,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:20,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:21:20,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:21:20,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:20,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-11-06 22:21:20,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646844303] [2020-11-06 22:21:20,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:21:20,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:20,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:21:20,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:21:20,329 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-11-06 22:21:20,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:20,575 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-06 22:21:20,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:21:20,576 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-11-06 22:21:20,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:20,577 INFO L225 Difference]: With dead ends: 28 [2020-11-06 22:21:20,577 INFO L226 Difference]: Without dead ends: 23 [2020-11-06 22:21:20,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:21:20,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-06 22:21:20,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-06 22:21:20,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-06 22:21:20,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-11-06 22:21:20,588 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2020-11-06 22:21:20,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:20,588 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-11-06 22:21:20,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:21:20,589 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-11-06 22:21:20,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:21:20,590 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:20,590 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:20,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-06 22:21:20,806 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:20,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:20,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1887732007, now seen corresponding path program 2 times [2020-11-06 22:21:20,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:20,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658490809] [2020-11-06 22:21:20,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:20,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:20,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:20,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:20,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:21,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:21,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:21,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:21:21,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658490809] [2020-11-06 22:21:21,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745352765] [2020-11-06 22:21:21,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:21,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:21:21,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:21,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-06 22:21:21,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-06 22:21:21,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:21,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 16 [2020-11-06 22:21:21,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162249681] [2020-11-06 22:21:21,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-06 22:21:21,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:21,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-06 22:21:21,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:21:21,392 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 16 states. [2020-11-06 22:21:21,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:21,957 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-11-06 22:21:21,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:21:21,958 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-11-06 22:21:21,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:21,960 INFO L225 Difference]: With dead ends: 31 [2020-11-06 22:21:21,960 INFO L226 Difference]: Without dead ends: 26 [2020-11-06 22:21:21,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-11-06 22:21:21,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-06 22:21:21,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-06 22:21:21,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-06 22:21:21,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-06 22:21:21,970 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-11-06 22:21:21,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:21,970 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-06 22:21:21,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-06 22:21:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-06 22:21:21,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-06 22:21:21,972 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:21,972 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:22,187 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:22,188 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:22,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:22,189 INFO L82 PathProgramCache]: Analyzing trace with hash 779050623, now seen corresponding path program 3 times [2020-11-06 22:21:22,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:22,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130979069] [2020-11-06 22:21:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:22,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:22,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:22,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:22,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:22,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:22,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:22,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:21:22,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130979069] [2020-11-06 22:21:22,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609701155] [2020-11-06 22:21:22,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:22,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-06 22:21:22,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:22,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 22:21:22,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:22,539 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-11-06 22:21:22,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:22,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-11-06 22:21:22,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164207900] [2020-11-06 22:21:22,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 22:21:22,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:22,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 22:21:22,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:21:22,543 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 10 states. [2020-11-06 22:21:22,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:22,927 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-11-06 22:21:22,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:21:22,927 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-11-06 22:21:22,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:22,929 INFO L225 Difference]: With dead ends: 34 [2020-11-06 22:21:22,929 INFO L226 Difference]: Without dead ends: 29 [2020-11-06 22:21:22,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:21:22,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-06 22:21:22,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-11-06 22:21:22,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-06 22:21:22,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-11-06 22:21:22,938 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 33 [2020-11-06 22:21:22,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:22,939 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-11-06 22:21:22,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 22:21:22,939 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-11-06 22:21:22,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-06 22:21:22,941 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:22,941 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:23,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:23,156 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:23,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:23,158 INFO L82 PathProgramCache]: Analyzing trace with hash -184104345, now seen corresponding path program 4 times [2020-11-06 22:21:23,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:23,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645683225] [2020-11-06 22:21:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:23,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:23,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:23,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:23,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:23,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:23,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:23,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:23,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-06 22:21:23,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645683225] [2020-11-06 22:21:23,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172432905] [2020-11-06 22:21:23,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:23,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:21:23,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:23,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-06 22:21:23,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-11-06 22:21:23,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:23,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2020-11-06 22:21:23,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341508196] [2020-11-06 22:21:23,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:21:23,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:23,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:21:23,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:21:23,509 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-11-06 22:21:23,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:23,936 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-11-06 22:21:23,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:21:23,937 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-11-06 22:21:23,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:23,939 INFO L225 Difference]: With dead ends: 37 [2020-11-06 22:21:23,940 INFO L226 Difference]: Without dead ends: 32 [2020-11-06 22:21:23,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:21:23,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-06 22:21:23,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-06 22:21:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:21:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-11-06 22:21:23,958 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-11-06 22:21:23,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:23,958 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-11-06 22:21:23,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:21:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-11-06 22:21:23,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-06 22:21:23,963 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:23,964 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:24,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:24,178 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:24,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:24,179 INFO L82 PathProgramCache]: Analyzing trace with hash -6214209, now seen corresponding path program 5 times [2020-11-06 22:21:24,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:24,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797918488] [2020-11-06 22:21:24,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:24,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:24,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:24,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:24,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:24,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:24,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:24,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:24,498 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-06 22:21:24,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797918488] [2020-11-06 22:21:24,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118452271] [2020-11-06 22:21:24,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:24,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-06 22:21:24,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:24,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-06 22:21:24,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-11-06 22:21:24,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:24,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2020-11-06 22:21:24,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177212049] [2020-11-06 22:21:24,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:21:24,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:24,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:21:24,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:21:24,633 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 12 states. [2020-11-06 22:21:25,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:25,078 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-11-06 22:21:25,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:21:25,079 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-11-06 22:21:25,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:25,084 INFO L225 Difference]: With dead ends: 40 [2020-11-06 22:21:25,084 INFO L226 Difference]: Without dead ends: 35 [2020-11-06 22:21:25,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2020-11-06 22:21:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-06 22:21:25,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-06 22:21:25,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-06 22:21:25,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-11-06 22:21:25,100 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 45 [2020-11-06 22:21:25,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:25,100 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-11-06 22:21:25,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:21:25,101 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-11-06 22:21:25,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-11-06 22:21:25,103 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:25,103 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:25,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-06 22:21:25,304 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:25,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:25,305 INFO L82 PathProgramCache]: Analyzing trace with hash -2097613913, now seen corresponding path program 6 times [2020-11-06 22:21:25,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:25,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764015113] [2020-11-06 22:21:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:25,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:25,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:25,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:25,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:25,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:25,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:25,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:25,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:25,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:25,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:25,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:25,596 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-06 22:21:25,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764015113] [2020-11-06 22:21:25,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135569704] [2020-11-06 22:21:25,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:25,683 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-06 22:21:25,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:25,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-06 22:21:25,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:25,784 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-11-06 22:21:25,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:25,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2020-11-06 22:21:25,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422989737] [2020-11-06 22:21:25,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-06 22:21:25,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:25,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-06 22:21:25,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-11-06 22:21:25,792 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 13 states. [2020-11-06 22:21:26,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:26,349 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-11-06 22:21:26,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:21:26,350 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-11-06 22:21:26,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:26,353 INFO L225 Difference]: With dead ends: 43 [2020-11-06 22:21:26,353 INFO L226 Difference]: Without dead ends: 38 [2020-11-06 22:21:26,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=317, Unknown=0, NotChecked=0, Total=462 [2020-11-06 22:21:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-06 22:21:26,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-11-06 22:21:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-06 22:21:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-11-06 22:21:26,368 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 51 [2020-11-06 22:21:26,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:26,369 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-11-06 22:21:26,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-06 22:21:26,371 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-11-06 22:21:26,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-11-06 22:21:26,373 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:26,373 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:26,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:26,588 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:26,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:26,589 INFO L82 PathProgramCache]: Analyzing trace with hash -437625601, now seen corresponding path program 7 times [2020-11-06 22:21:26,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:26,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45087171] [2020-11-06 22:21:26,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:26,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:26,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:26,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:26,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:26,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:26,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:26,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:26,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:26,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:26,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:26,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:26,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:26,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:26,912 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-06 22:21:26,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45087171] [2020-11-06 22:21:26,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501596054] [2020-11-06 22:21:26,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:26,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-06 22:21:26,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-11-06 22:21:27,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:27,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2020-11-06 22:21:27,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142552052] [2020-11-06 22:21:27,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-06 22:21:27,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:27,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-06 22:21:27,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:21:27,076 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 14 states. [2020-11-06 22:21:27,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:27,675 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-11-06 22:21:27,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-06 22:21:27,676 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 57 [2020-11-06 22:21:27,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:27,678 INFO L225 Difference]: With dead ends: 46 [2020-11-06 22:21:27,678 INFO L226 Difference]: Without dead ends: 41 [2020-11-06 22:21:27,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2020-11-06 22:21:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-11-06 22:21:27,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-11-06 22:21:27,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-06 22:21:27,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-11-06 22:21:27,695 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 57 [2020-11-06 22:21:27,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:27,696 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-11-06 22:21:27,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-06 22:21:27,698 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-11-06 22:21:27,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-06 22:21:27,699 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:27,699 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:27,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:27,914 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:27,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:27,915 INFO L82 PathProgramCache]: Analyzing trace with hash 331021543, now seen corresponding path program 8 times [2020-11-06 22:21:27,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:27,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023854333] [2020-11-06 22:21:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:27,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:27,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:27,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:28,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:28,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:28,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:28,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:28,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:28,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:28,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:28,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:28,274 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-06 22:21:28,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023854333] [2020-11-06 22:21:28,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371850158] [2020-11-06 22:21:28,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:28,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:21:28,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:28,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-06 22:21:28,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-11-06 22:21:28,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:28,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2020-11-06 22:21:28,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562350620] [2020-11-06 22:21:28,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:21:28,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:28,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:21:28,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:21:28,462 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-11-06 22:21:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:29,087 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-11-06 22:21:29,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-06 22:21:29,087 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 63 [2020-11-06 22:21:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:29,089 INFO L225 Difference]: With dead ends: 49 [2020-11-06 22:21:29,089 INFO L226 Difference]: Without dead ends: 44 [2020-11-06 22:21:29,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-11-06 22:21:29,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-06 22:21:29,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-11-06 22:21:29,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-06 22:21:29,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-11-06 22:21:29,098 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 63 [2020-11-06 22:21:29,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:29,098 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-11-06 22:21:29,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:21:29,098 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-11-06 22:21:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-11-06 22:21:29,102 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:29,102 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:29,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-11-06 22:21:29,318 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:29,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:29,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1458901953, now seen corresponding path program 9 times [2020-11-06 22:21:29,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:29,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999376574] [2020-11-06 22:21:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:29,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:29,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:21:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:29,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:21:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:29,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:29,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:29,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:29,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:29,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:29,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:29,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:29,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:29,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:29,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:21:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:21:29,758 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-06 22:21:29,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999376574] [2020-11-06 22:21:29,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496004100] [2020-11-06 22:21:29,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:29,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-06 22:21:29,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:21:29,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-06 22:21:29,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:21:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-11-06 22:21:30,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:21:30,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 25] total 37 [2020-11-06 22:21:30,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778132908] [2020-11-06 22:21:30,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-06 22:21:30,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:21:30,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-06 22:21:30,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2020-11-06 22:21:30,680 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 37 states. [2020-11-06 22:21:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:21:32,335 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-11-06 22:21:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-06 22:21:32,336 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 69 [2020-11-06 22:21:32,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:21:32,341 INFO L225 Difference]: With dead ends: 52 [2020-11-06 22:21:32,341 INFO L226 Difference]: Without dead ends: 47 [2020-11-06 22:21:32,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=603, Invalid=2703, Unknown=0, NotChecked=0, Total=3306 [2020-11-06 22:21:32,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-06 22:21:32,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-11-06 22:21:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-06 22:21:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-11-06 22:21:32,360 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 69 [2020-11-06 22:21:32,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:21:32,360 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-11-06 22:21:32,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-06 22:21:32,361 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-11-06 22:21:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-11-06 22:21:32,362 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:21:32,362 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:21:32,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:21:32,563 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:21:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:21:32,565 INFO L82 PathProgramCache]: Analyzing trace with hash 749528615, now seen corresponding path program 10 times [2020-11-06 22:21:32,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:21:32,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587444847] [2020-11-06 22:21:32,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:21:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:21:32,594 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:21:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:21:32,621 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:21:32,665 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:21:32,665 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:21:32,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 22:21:32,744 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:21:32 BoogieIcfgContainer [2020-11-06 22:21:32,744 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:21:32,747 INFO L168 Benchmark]: Toolchain (without parser) took 14698.27 ms. Allocated memory was 153.1 MB in the beginning and 276.8 MB in the end (delta: 123.7 MB). Free memory was 128.6 MB in the beginning and 133.3 MB in the end (delta: -4.7 MB). Peak memory consumption was 119.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:21:32,747 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 153.1 MB. Free memory is still 126.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:21:32,748 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.83 ms. Allocated memory is still 153.1 MB. Free memory was 128.1 MB in the beginning and 119.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:21:32,749 INFO L168 Benchmark]: Boogie Preprocessor took 33.35 ms. Allocated memory is still 153.1 MB. Free memory was 119.0 MB in the beginning and 117.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:21:32,749 INFO L168 Benchmark]: RCFGBuilder took 554.77 ms. Allocated memory is still 153.1 MB. Free memory was 117.6 MB in the beginning and 105.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:21:32,750 INFO L168 Benchmark]: TraceAbstraction took 13796.59 ms. Allocated memory was 153.1 MB in the beginning and 276.8 MB in the end (delta: 123.7 MB). Free memory was 136.5 MB in the beginning and 133.3 MB in the end (delta: 3.2 MB). Peak memory consumption was 126.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:21:32,754 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 153.1 MB. Free memory is still 126.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 279.83 ms. Allocated memory is still 153.1 MB. Free memory was 128.1 MB in the beginning and 119.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.35 ms. Allocated memory is still 153.1 MB. Free memory was 119.0 MB in the beginning and 117.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 554.77 ms. Allocated memory is still 153.1 MB. Free memory was 117.6 MB in the beginning and 105.1 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 13796.59 ms. Allocated memory was 153.1 MB in the beginning and 276.8 MB in the end (delta: 123.7 MB). Free memory was 136.5 MB in the beginning and 133.3 MB in the end (delta: 3.2 MB). Peak memory consumption was 126.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int a = 10; [L15] int b = 0; VAL [a=10, b=0] [L16] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=10] [L6] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=10, m=0, n=10] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=9] [L6] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=9, m=1, n=9] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=8] [L6] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=8, m=2, n=8] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=7] [L6] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=7, m=3, n=7] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=6] [L6] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=6, m=4, n=6] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=5] [L6] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=5, m=5, n=5] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=4] [L6] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=4, m=6, n=4] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=3] [L6] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=3, m=7, n=3] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=2] [L6] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=2, m=8, n=2] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=1] [L6] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=1, m=9, n=1] [L9] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=0] [L6] COND TRUE n <= 0 [L7] return m + n; VAL [\old(m)=10, \old(n)=0, \result=10, m=10, n=0] [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=1, m=9, n=1, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=2, m=8, n=2, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=3, m=7, n=3, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=4, m=6, n=4, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=5, m=5, n=5, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=6, m=4, n=6, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=7, m=3, n=7, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=8, m=2, n=8, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=9, m=1, n=9, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L9] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=10, m=0, n=10, sum(n - 1, m + 1)=10] [L9] return sum(n - 1, m + 1); [L16] RET, EXPR sum(a, b) VAL [a=10, b=0, sum(a, b)=10] [L16] int result = sum(a, b); [L17] COND TRUE result == a + b VAL [a=10, b=0, result=10] [L18] CALL reach_error() [L3] __assert_fail("0", "sum_10x0-2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.5s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 131 SDtfs, 392 SDslu, 319 SDs, 0 SdLazy, 839 SolverSat, 288 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 697 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 5.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 900 NumberOfCodeBlocks, 894 NumberOfCodeBlocksAsserted, 45 NumberOfCheckSat, 806 ConstructedInterpolants, 0 QuantifiedInterpolants, 110400 SizeOfPredicates, 69 NumberOfNonLiveVariables, 1688 ConjunctsInSsa, 156 ConjunctsInUnsatCore, 19 InterpolantComputations, 1 PerfectInterpolantSequences, 900/1800 InterpolantCoveringCapability, 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...