/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/fibo_2calls_5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:16:05,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:16:05,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:16:05,393 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:16:05,394 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:16:05,395 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:16:05,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:16:05,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:16:05,409 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:16:05,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:16:05,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:16:05,414 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:16:05,415 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:16:05,420 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:16:05,422 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:16:05,424 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:16:05,427 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:16:05,428 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:16:05,432 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:16:05,437 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:16:05,441 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:16:05,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:16:05,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:16:05,448 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:16:05,453 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:16:05,472 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:16:05,474 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:16:05,474 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:16:05,475 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 22:16:05,527 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:16:05,527 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:16:05,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:16:05,531 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:16:05,531 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:16:05,531 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:16:05,531 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:16:05,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:16:05,532 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:16:05,532 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:16:05,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:16:05,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:16:05,533 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:16:05,534 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:16:05,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:16:05,534 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:16:05,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:16:05,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:16:05,535 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:16:05,535 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:16:05,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:16:05,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:16:05,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:16:05,536 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:16:05,536 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:16:05,536 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:16:05,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:16:05,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:16:05,537 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:16:05,537 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:16:05,949 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:16:05,979 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:16:05,982 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:16:05,983 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:16:05,984 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:16:05,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-11-06 22:16:06,056 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9edcb869f/56c0764b95fc4b6aa0f0186f5a461f9f/FLAGb8114ee23 [2020-11-06 22:16:06,623 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:16:06,624 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-1.c [2020-11-06 22:16:06,631 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9edcb869f/56c0764b95fc4b6aa0f0186f5a461f9f/FLAGb8114ee23 [2020-11-06 22:16:07,019 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9edcb869f/56c0764b95fc4b6aa0f0186f5a461f9f [2020-11-06 22:16:07,022 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:16:07,031 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:16:07,035 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:16:07,035 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:16:07,039 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:16:07,040 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:16:07" (1/1) ... [2020-11-06 22:16:07,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a6a153 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:07, skipping insertion in model container [2020-11-06 22:16:07,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:16:07" (1/1) ... [2020-11-06 22:16:07,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:16:07,076 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:16:07,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:16:07,324 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:16:07,345 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:16:07,363 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:16:07,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:07 WrapperNode [2020-11-06 22:16:07,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:16:07,368 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:16:07,369 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:16:07,369 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:16:07,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:07" (1/1) ... [2020-11-06 22:16:07,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:07" (1/1) ... [2020-11-06 22:16:07,395 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:07" (1/1) ... [2020-11-06 22:16:07,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:07" (1/1) ... [2020-11-06 22:16:07,415 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:07" (1/1) ... [2020-11-06 22:16:07,418 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:07" (1/1) ... [2020-11-06 22:16:07,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:07" (1/1) ... [2020-11-06 22:16:07,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:16:07,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:16:07,429 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:16:07,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:16:07,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:07" (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 22:16:07,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:16:07,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:16:07,514 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:16:07,514 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-11-06 22:16:07,514 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-11-06 22:16:07,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:16:07,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:16:07,514 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:16:07,515 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:16:07,515 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:16:07,515 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:16:07,516 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-11-06 22:16:07,516 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-11-06 22:16:07,517 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:16:07,517 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:16:07,518 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:16:07,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:16:07,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:16:07,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:16:07,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:16:07,902 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:16:07,902 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:16:07,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:16:07 BoogieIcfgContainer [2020-11-06 22:16:07,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:16:07,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:16:07,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:16:07,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:16:07,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:16:07" (1/3) ... [2020-11-06 22:16:07,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59591cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:16:07, skipping insertion in model container [2020-11-06 22:16:07,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:16:07" (2/3) ... [2020-11-06 22:16:07,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59591cd2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:16:07, skipping insertion in model container [2020-11-06 22:16:07,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:16:07" (3/3) ... [2020-11-06 22:16:07,913 INFO L111 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-1.c [2020-11-06 22:16:07,928 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:16:07,931 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:16:07,943 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:16:08,015 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:16:08,015 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:16:08,015 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:16:08,015 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:16:08,016 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:16:08,020 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:16:08,020 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:16:08,021 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:16:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-11-06 22:16:08,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:16:08,053 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:16:08,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:16:08,054 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:16:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:16:08,066 INFO L82 PathProgramCache]: Analyzing trace with hash 219823047, now seen corresponding path program 1 times [2020-11-06 22:16:08,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:16:08,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233633416] [2020-11-06 22:16:08,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:16:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:08,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:16:08,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:08,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:16:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:08,403 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 22:16:08,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233633416] [2020-11-06 22:16:08,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:16:08,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:16:08,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625514829] [2020-11-06 22:16:08,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:16:08,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:16:08,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:16:08,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:16:08,435 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 6 states. [2020-11-06 22:16:08,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:16:08,919 INFO L93 Difference]: Finished difference Result 50 states and 60 transitions. [2020-11-06 22:16:08,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:16:08,921 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-06 22:16:08,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:16:08,932 INFO L225 Difference]: With dead ends: 50 [2020-11-06 22:16:08,932 INFO L226 Difference]: Without dead ends: 32 [2020-11-06 22:16:08,937 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 22:16:08,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-06 22:16:09,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-11-06 22:16:09,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:16:09,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-11-06 22:16:09,012 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 15 [2020-11-06 22:16:09,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:16:09,013 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-11-06 22:16:09,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:16:09,013 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-11-06 22:16:09,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:16:09,016 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:16:09,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:16:09,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:16:09,017 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:16:09,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:16:09,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1220716726, now seen corresponding path program 1 times [2020-11-06 22:16:09,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:16:09,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873930660] [2020-11-06 22:16:09,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:16:09,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:09,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:16:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:09,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:16:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:09,209 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 22:16:09,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873930660] [2020-11-06 22:16:09,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:16:09,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:16:09,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724170180] [2020-11-06 22:16:09,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:16:09,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:16:09,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:16:09,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:16:09,213 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 6 states. [2020-11-06 22:16:09,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:16:09,488 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2020-11-06 22:16:09,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:16:09,489 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-06 22:16:09,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:16:09,491 INFO L225 Difference]: With dead ends: 39 [2020-11-06 22:16:09,491 INFO L226 Difference]: Without dead ends: 34 [2020-11-06 22:16:09,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:16:09,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-06 22:16:09,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-11-06 22:16:09,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-06 22:16:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-11-06 22:16:09,504 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 16 [2020-11-06 22:16:09,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:16:09,504 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-11-06 22:16:09,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:16:09,505 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-11-06 22:16:09,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-06 22:16:09,506 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:16:09,507 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:16:09,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:16:09,507 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:16:09,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:16:09,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2083135015, now seen corresponding path program 1 times [2020-11-06 22:16:09,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:16:09,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981989495] [2020-11-06 22:16:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:16:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:09,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:16:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:09,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:16:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:09,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:09,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-06 22:16:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:16:09,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981989495] [2020-11-06 22:16:09,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705942942] [2020-11-06 22:16:09,650 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 22:16:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:09,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:16:09,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:16:09,892 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:16:09,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:16:09,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2020-11-06 22:16:09,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964696093] [2020-11-06 22:16:09,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-06 22:16:09,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:16:09,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-06 22:16:09,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-11-06 22:16:09,895 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 11 states. [2020-11-06 22:16:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:16:10,480 INFO L93 Difference]: Finished difference Result 61 states and 81 transitions. [2020-11-06 22:16:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-06 22:16:10,481 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2020-11-06 22:16:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:16:10,483 INFO L225 Difference]: With dead ends: 61 [2020-11-06 22:16:10,483 INFO L226 Difference]: Without dead ends: 36 [2020-11-06 22:16:10,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-11-06 22:16:10,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-06 22:16:10,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-11-06 22:16:10,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-06 22:16:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-11-06 22:16:10,494 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 28 [2020-11-06 22:16:10,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:16:10,495 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-11-06 22:16:10,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-06 22:16:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-11-06 22:16:10,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:16:10,496 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:16:10,497 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:16:10,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:16:10,711 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:16:10,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:16:10,713 INFO L82 PathProgramCache]: Analyzing trace with hash 752879968, now seen corresponding path program 1 times [2020-11-06 22:16:10,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:16:10,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366105384] [2020-11-06 22:16:10,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:16:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:10,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:16:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:10,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:16:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:10,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:10,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:16:10,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366105384] [2020-11-06 22:16:10,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113262793] [2020-11-06 22:16:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:16:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:10,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-06 22:16:10,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:16:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:16:11,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:16:11,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2020-11-06 22:16:11,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659017004] [2020-11-06 22:16:11,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 22:16:11,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:16:11,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 22:16:11,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:16:11,004 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 10 states. [2020-11-06 22:16:11,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:16:11,631 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2020-11-06 22:16:11,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:16:11,633 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2020-11-06 22:16:11,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:16:11,637 INFO L225 Difference]: With dead ends: 57 [2020-11-06 22:16:11,637 INFO L226 Difference]: Without dead ends: 52 [2020-11-06 22:16:11,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-11-06 22:16:11,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-06 22:16:11,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2020-11-06 22:16:11,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-06 22:16:11,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2020-11-06 22:16:11,653 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 29 [2020-11-06 22:16:11,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:16:11,654 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2020-11-06 22:16:11,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 22:16:11,654 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2020-11-06 22:16:11,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-06 22:16:11,656 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:16:11,656 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:16:11,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:16:11,870 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:16:11,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:16:11,871 INFO L82 PathProgramCache]: Analyzing trace with hash 2070859795, now seen corresponding path program 1 times [2020-11-06 22:16:11,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:16:11,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361385171] [2020-11-06 22:16:11,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:16:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:11,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:16:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:11,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:16:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:11,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:11,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:11,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-11-06 22:16:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:11,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-11-06 22:16:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:12,004 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 22:16:12,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361385171] [2020-11-06 22:16:12,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570233300] [2020-11-06 22:16:12,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:16:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:12,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:16:12,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:16:12,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-06 22:16:12,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:16:12,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2020-11-06 22:16:12,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716361426] [2020-11-06 22:16:12,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-06 22:16:12,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:16:12,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-06 22:16:12,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:16:12,172 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand 12 states. [2020-11-06 22:16:13,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:16:13,067 INFO L93 Difference]: Finished difference Result 111 states and 173 transitions. [2020-11-06 22:16:13,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-06 22:16:13,068 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 41 [2020-11-06 22:16:13,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:16:13,076 INFO L225 Difference]: With dead ends: 111 [2020-11-06 22:16:13,077 INFO L226 Difference]: Without dead ends: 68 [2020-11-06 22:16:13,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2020-11-06 22:16:13,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-06 22:16:13,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-11-06 22:16:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-11-06 22:16:13,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 97 transitions. [2020-11-06 22:16:13,112 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 97 transitions. Word has length 41 [2020-11-06 22:16:13,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:16:13,112 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 97 transitions. [2020-11-06 22:16:13,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-06 22:16:13,112 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 97 transitions. [2020-11-06 22:16:13,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-06 22:16:13,115 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:16:13,116 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:16:13,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:16:13,320 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:16:13,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:16:13,320 INFO L82 PathProgramCache]: Analyzing trace with hash 1960607334, now seen corresponding path program 1 times [2020-11-06 22:16:13,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:16:13,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946880765] [2020-11-06 22:16:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:16:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:13,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:16:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:13,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:16:13,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:13,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:13,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:13,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:13,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:13,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:13,595 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-06 22:16:13,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946880765] [2020-11-06 22:16:13,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358085773] [2020-11-06 22:16:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:16:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:13,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:16:13,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:16:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-11-06 22:16:13,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:16:13,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-11-06 22:16:13,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830650859] [2020-11-06 22:16:13,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-06 22:16:13,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:16:13,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-06 22:16:13,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:16:13,835 INFO L87 Difference]: Start difference. First operand 68 states and 97 transitions. Second operand 14 states. [2020-11-06 22:16:15,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:16:15,200 INFO L93 Difference]: Finished difference Result 183 states and 327 transitions. [2020-11-06 22:16:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:16:15,201 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 42 [2020-11-06 22:16:15,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:16:15,206 INFO L225 Difference]: With dead ends: 183 [2020-11-06 22:16:15,206 INFO L226 Difference]: Without dead ends: 122 [2020-11-06 22:16:15,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2020-11-06 22:16:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-06 22:16:15,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 108. [2020-11-06 22:16:15,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-06 22:16:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 171 transitions. [2020-11-06 22:16:15,249 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 171 transitions. Word has length 42 [2020-11-06 22:16:15,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:16:15,249 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 171 transitions. [2020-11-06 22:16:15,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-06 22:16:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 171 transitions. [2020-11-06 22:16:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-11-06 22:16:15,256 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:16:15,257 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:16:15,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:16:15,466 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:16:15,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:16:15,467 INFO L82 PathProgramCache]: Analyzing trace with hash -751460799, now seen corresponding path program 1 times [2020-11-06 22:16:15,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:16:15,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364116906] [2020-11-06 22:16:15,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:16:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:15,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:16:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:15,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:16:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:15,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:15,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:15,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:15,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:15,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:15,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:15,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:15,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:15,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-11-06 22:16:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:15,687 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-11-06 22:16:15,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364116906] [2020-11-06 22:16:15,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935651162] [2020-11-06 22:16:15,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:16:15,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:15,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 22:16:15,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:16:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-11-06 22:16:15,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:16:15,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2020-11-06 22:16:15,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373599698] [2020-11-06 22:16:15,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:16:15,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:16:15,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:16:15,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:16:15,967 INFO L87 Difference]: Start difference. First operand 108 states and 171 transitions. Second operand 15 states. [2020-11-06 22:16:17,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:16:17,502 INFO L93 Difference]: Finished difference Result 261 states and 501 transitions. [2020-11-06 22:16:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-06 22:16:17,503 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2020-11-06 22:16:17,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:16:17,513 INFO L225 Difference]: With dead ends: 261 [2020-11-06 22:16:17,513 INFO L226 Difference]: Without dead ends: 160 [2020-11-06 22:16:17,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2020-11-06 22:16:17,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-06 22:16:17,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 114. [2020-11-06 22:16:17,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-06 22:16:17,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 182 transitions. [2020-11-06 22:16:17,565 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 182 transitions. Word has length 56 [2020-11-06 22:16:17,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:16:17,565 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 182 transitions. [2020-11-06 22:16:17,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:16:17,566 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 182 transitions. [2020-11-06 22:16:17,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-06 22:16:17,571 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:16:17,571 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:16:17,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-06 22:16:17,787 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:16:17,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:16:17,788 INFO L82 PathProgramCache]: Analyzing trace with hash 2107233529, now seen corresponding path program 1 times [2020-11-06 22:16:17,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:16:17,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559282961] [2020-11-06 22:16:17,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:16:17,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:17,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:16:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:17,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:16:17,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:17,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:17,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:18,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:18,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:18,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:18,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:18,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:18,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:18,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:16:18,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:18,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-06 22:16:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:18,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:18,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:18,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:18,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:18,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:18,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:18,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:18,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:16:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-11-06 22:16:18,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559282961] [2020-11-06 22:16:18,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779464066] [2020-11-06 22:16:18,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 22:16:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:18,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:16:18,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:16:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 36 proven. 58 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2020-11-06 22:16:18,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:16:18,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2020-11-06 22:16:18,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508120506] [2020-11-06 22:16:18,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:16:18,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:16:18,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:16:18,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:16:18,401 INFO L87 Difference]: Start difference. First operand 114 states and 182 transitions. Second operand 15 states. [2020-11-06 22:16:19,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:16:19,873 INFO L93 Difference]: Finished difference Result 247 states and 477 transitions. [2020-11-06 22:16:19,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-06 22:16:19,874 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 112 [2020-11-06 22:16:19,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:16:19,880 INFO L225 Difference]: With dead ends: 247 [2020-11-06 22:16:19,880 INFO L226 Difference]: Without dead ends: 125 [2020-11-06 22:16:19,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2020-11-06 22:16:19,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-11-06 22:16:19,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 103. [2020-11-06 22:16:19,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-06 22:16:19,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 156 transitions. [2020-11-06 22:16:19,907 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 156 transitions. Word has length 112 [2020-11-06 22:16:19,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:16:19,907 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 156 transitions. [2020-11-06 22:16:19,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:16:19,908 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 156 transitions. [2020-11-06 22:16:19,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-11-06 22:16:19,911 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:16:19,911 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 9, 8, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:16:20,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:16:20,125 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:16:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:16:20,125 INFO L82 PathProgramCache]: Analyzing trace with hash -614371322, now seen corresponding path program 1 times [2020-11-06 22:16:20,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:16:20,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793950980] [2020-11-06 22:16:20,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:16:20,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:16:20,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:16:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:20,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:20,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:20,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:20,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:20,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:16:20,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:20,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-11-06 22:16:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:20,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:20,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:20,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,652 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 136 proven. 161 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-11-06 22:16:20,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793950980] [2020-11-06 22:16:20,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128041901] [2020-11-06 22:16:20,652 INFO L95 rtionOrderModulation]: Keeping assertion order 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 22:16:20,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:20,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-06 22:16:20,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:16:20,964 INFO L134 CoverageAnalysis]: Checked inductivity of 544 backedges. 82 proven. 131 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-11-06 22:16:20,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:16:20,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 23 [2020-11-06 22:16:20,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815257365] [2020-11-06 22:16:20,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-06 22:16:20,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:16:20,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-06 22:16:20,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2020-11-06 22:16:20,971 INFO L87 Difference]: Start difference. First operand 103 states and 156 transitions. Second operand 23 states. [2020-11-06 22:16:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:16:24,006 INFO L93 Difference]: Finished difference Result 236 states and 438 transitions. [2020-11-06 22:16:24,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-06 22:16:24,006 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 152 [2020-11-06 22:16:24,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:16:24,010 INFO L225 Difference]: With dead ends: 236 [2020-11-06 22:16:24,010 INFO L226 Difference]: Without dead ends: 119 [2020-11-06 22:16:24,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=440, Invalid=2752, Unknown=0, NotChecked=0, Total=3192 [2020-11-06 22:16:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-11-06 22:16:24,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2020-11-06 22:16:24,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-06 22:16:24,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 140 transitions. [2020-11-06 22:16:24,037 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 140 transitions. Word has length 152 [2020-11-06 22:16:24,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:16:24,038 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 140 transitions. [2020-11-06 22:16:24,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-06 22:16:24,038 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 140 transitions. [2020-11-06 22:16:24,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-06 22:16:24,041 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:16:24,042 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:16:24,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:16:24,256 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:16:24,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:16:24,257 INFO L82 PathProgramCache]: Analyzing trace with hash 605956523, now seen corresponding path program 2 times [2020-11-06 22:16:24,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:16:24,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38243420] [2020-11-06 22:16:24,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:16:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:24,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:16:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:24,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:16:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:24,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:24,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:24,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:24,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:24,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:24,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:24,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:16:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:24,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:24,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:24,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 22:16:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:24,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:24,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:24,546 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 77 proven. 24 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2020-11-06 22:16:24,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38243420] [2020-11-06 22:16:24,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233247358] [2020-11-06 22:16:24,546 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 22:16:24,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:16:24,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:16:24,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-06 22:16:24,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:16:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 58 proven. 15 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2020-11-06 22:16:24,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:16:24,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2020-11-06 22:16:24,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613478806] [2020-11-06 22:16:24,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-06 22:16:24,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:16:24,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-06 22:16:24,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-11-06 22:16:24,718 INFO L87 Difference]: Start difference. First operand 101 states and 140 transitions. Second operand 15 states. [2020-11-06 22:16:25,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:16:25,810 INFO L93 Difference]: Finished difference Result 202 states and 289 transitions. [2020-11-06 22:16:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-06 22:16:25,811 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 97 [2020-11-06 22:16:25,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:16:25,813 INFO L225 Difference]: With dead ends: 202 [2020-11-06 22:16:25,813 INFO L226 Difference]: Without dead ends: 114 [2020-11-06 22:16:25,814 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2020-11-06 22:16:25,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-06 22:16:25,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2020-11-06 22:16:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-06 22:16:25,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 146 transitions. [2020-11-06 22:16:25,828 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 146 transitions. Word has length 97 [2020-11-06 22:16:25,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:16:25,829 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 146 transitions. [2020-11-06 22:16:25,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-06 22:16:25,829 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 146 transitions. [2020-11-06 22:16:25,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-11-06 22:16:25,831 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:16:25,831 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:16:26,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-06 22:16:26,046 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:16:26,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:16:26,047 INFO L82 PathProgramCache]: Analyzing trace with hash 2083902716, now seen corresponding path program 3 times [2020-11-06 22:16:26,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:16:26,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053763779] [2020-11-06 22:16:26,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:16:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:16:26,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:16:26,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:26,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:26,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:26,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:16:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:26,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 22:16:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:26,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:26,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:26,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-11-06 22:16:26,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053763779] [2020-11-06 22:16:26,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192723943] [2020-11-06 22:16:26,768 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 22:16:26,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-06 22:16:26,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:16:26,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 63 conjunts are in the unsatisfiable core [2020-11-06 22:16:26,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:16:27,382 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2020-11-06 22:16:27,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:16:27,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 29 [2020-11-06 22:16:27,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043368296] [2020-11-06 22:16:27,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-06 22:16:27,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:16:27,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-06 22:16:27,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=745, Unknown=0, NotChecked=0, Total=812 [2020-11-06 22:16:27,385 INFO L87 Difference]: Start difference. First operand 108 states and 146 transitions. Second operand 29 states. [2020-11-06 22:16:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:16:29,454 INFO L93 Difference]: Finished difference Result 128 states and 173 transitions. [2020-11-06 22:16:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-06 22:16:29,454 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 111 [2020-11-06 22:16:29,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:16:29,457 INFO L225 Difference]: With dead ends: 128 [2020-11-06 22:16:29,457 INFO L226 Difference]: Without dead ends: 123 [2020-11-06 22:16:29,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 140 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=165, Invalid=2187, Unknown=0, NotChecked=0, Total=2352 [2020-11-06 22:16:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-06 22:16:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2020-11-06 22:16:29,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-11-06 22:16:29,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 166 transitions. [2020-11-06 22:16:29,473 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 166 transitions. Word has length 111 [2020-11-06 22:16:29,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:16:29,473 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 166 transitions. [2020-11-06 22:16:29,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-06 22:16:29,473 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 166 transitions. [2020-11-06 22:16:29,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-11-06 22:16:29,475 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:16:29,476 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:16:29,691 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:16:29,692 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:16:29,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:16:29,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1900223229, now seen corresponding path program 4 times [2020-11-06 22:16:29,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:16:29,693 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142733120] [2020-11-06 22:16:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:16:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:29,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:16:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:29,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:16:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:29,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:29,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:29,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:29,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:29,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:29,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:29,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:29,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:29,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:16:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:29,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:29,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:29,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-11-06 22:16:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:29,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:29,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:29,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:29,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:29,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 56 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-11-06 22:16:30,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142733120] [2020-11-06 22:16:30,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646582232] [2020-11-06 22:16:30,034 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:16:30,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:16:30,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:16:30,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-06 22:16:30,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:16:30,241 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 55 proven. 61 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2020-11-06 22:16:30,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:16:30,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 18 [2020-11-06 22:16:30,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628650852] [2020-11-06 22:16:30,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-06 22:16:30,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:16:30,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-06 22:16:30,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-11-06 22:16:30,244 INFO L87 Difference]: Start difference. First operand 121 states and 166 transitions. Second operand 18 states. [2020-11-06 22:16:31,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:16:31,588 INFO L93 Difference]: Finished difference Result 238 states and 336 transitions. [2020-11-06 22:16:31,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-06 22:16:31,589 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 112 [2020-11-06 22:16:31,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:16:31,591 INFO L225 Difference]: With dead ends: 238 [2020-11-06 22:16:31,591 INFO L226 Difference]: Without dead ends: 131 [2020-11-06 22:16:31,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=189, Invalid=1071, Unknown=0, NotChecked=0, Total=1260 [2020-11-06 22:16:31,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-06 22:16:31,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 118. [2020-11-06 22:16:31,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-11-06 22:16:31,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 157 transitions. [2020-11-06 22:16:31,606 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 157 transitions. Word has length 112 [2020-11-06 22:16:31,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:16:31,606 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 157 transitions. [2020-11-06 22:16:31,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-06 22:16:31,607 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 157 transitions. [2020-11-06 22:16:31,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-11-06 22:16:31,608 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:16:31,609 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:16:31,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:16:31,823 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:16:31,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:16:31,824 INFO L82 PathProgramCache]: Analyzing trace with hash 195814027, now seen corresponding path program 1 times [2020-11-06 22:16:31,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:16:31,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221734162] [2020-11-06 22:16:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:16:31,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:31,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:16:31,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:31,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:16:31,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:31,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:31,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:31,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:31,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:31,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:31,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:32,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:32,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:32,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:32,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:32,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:16:32,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:32,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-11-06 22:16:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:32,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:32,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:32,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:32,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:32,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-11-06 22:16:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:32,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:32,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:32,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:32,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:32,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 61 proven. 94 refuted. 0 times theorem prover too weak. 203 trivial. 0 not checked. [2020-11-06 22:16:32,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221734162] [2020-11-06 22:16:32,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779116591] [2020-11-06 22:16:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:16:32,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:32,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-06 22:16:32,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:16:32,344 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 48 proven. 133 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2020-11-06 22:16:32,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:16:32,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2020-11-06 22:16:32,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294207241] [2020-11-06 22:16:32,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-06 22:16:32,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:16:32,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-06 22:16:32,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-11-06 22:16:32,346 INFO L87 Difference]: Start difference. First operand 118 states and 157 transitions. Second operand 17 states. [2020-11-06 22:16:33,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:16:33,569 INFO L93 Difference]: Finished difference Result 232 states and 321 transitions. [2020-11-06 22:16:33,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-06 22:16:33,570 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 125 [2020-11-06 22:16:33,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:16:33,571 INFO L225 Difference]: With dead ends: 232 [2020-11-06 22:16:33,571 INFO L226 Difference]: Without dead ends: 86 [2020-11-06 22:16:33,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2020-11-06 22:16:33,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-06 22:16:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-11-06 22:16:33,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-06 22:16:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2020-11-06 22:16:33,582 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 125 [2020-11-06 22:16:33,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:16:33,582 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2020-11-06 22:16:33,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-06 22:16:33,582 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2020-11-06 22:16:33,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-11-06 22:16:33,584 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:16:33,584 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:16:33,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-06 22:16:33,800 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:16:33,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:16:33,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1001167155, now seen corresponding path program 5 times [2020-11-06 22:16:33,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:16:33,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558309172] [2020-11-06 22:16:33,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:16:33,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:33,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:16:33,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:33,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:16:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:33,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:33,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:33,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:33,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:33,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:33,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:34,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:34,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:34,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:16:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:34,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:34,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:34,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:34,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-11-06 22:16:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:34,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:34,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:34,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:34,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:34,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-11-06 22:16:34,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:34,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-11-06 22:16:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:34,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-11-06 22:16:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:34,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-11-06 22:16:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:16:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 89 proven. 150 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2020-11-06 22:16:34,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558309172] [2020-11-06 22:16:34,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181458451] [2020-11-06 22:16:34,188 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:16:34,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-06 22:16:34,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:16:34,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-06 22:16:34,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:16:34,444 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 105 proven. 126 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2020-11-06 22:16:34,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:16:34,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 21 [2020-11-06 22:16:34,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220036062] [2020-11-06 22:16:34,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-06 22:16:34,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:16:34,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-06 22:16:34,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2020-11-06 22:16:34,447 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand 21 states. [2020-11-06 22:16:36,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:16:36,259 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-11-06 22:16:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-06 22:16:36,260 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 138 [2020-11-06 22:16:36,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:16:36,260 INFO L225 Difference]: With dead ends: 91 [2020-11-06 22:16:36,260 INFO L226 Difference]: Without dead ends: 0 [2020-11-06 22:16:36,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=296, Invalid=1596, Unknown=0, NotChecked=0, Total=1892 [2020-11-06 22:16:36,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-06 22:16:36,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-06 22:16:36,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-06 22:16:36,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-06 22:16:36,264 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 138 [2020-11-06 22:16:36,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:16:36,264 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-06 22:16:36,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-06 22:16:36,264 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-06 22:16:36,264 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-06 22:16:36,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-11-06 22:16:36,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-06 22:16:38,189 WARN L194 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 21 [2020-11-06 22:16:38,801 WARN L194 SmtUtils]: Spent 587.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 26 [2020-11-06 22:16:38,953 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 7 [2020-11-06 22:16:39,219 WARN L194 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 7 [2020-11-06 22:16:39,333 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 1 [2020-11-06 22:16:39,420 INFO L266 CegarLoopResult]: For program point reach_errorEXIT(line 4) no Hoare annotation was computed. [2020-11-06 22:16:39,420 INFO L269 CegarLoopResult]: At program point reach_errorENTRY(line 4) the Hoare annotation is: true [2020-11-06 22:16:39,420 INFO L266 CegarLoopResult]: For program point reach_errorFINAL(line 4) no Hoare annotation was computed. [2020-11-06 22:16:39,420 INFO L266 CegarLoopResult]: For program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 4) no Hoare annotation was computed. [2020-11-06 22:16:39,421 INFO L266 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:16:39,421 INFO L262 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-11-06 22:16:39,421 INFO L266 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:16:39,421 INFO L266 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-06 22:16:39,421 INFO L269 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-11-06 22:16:39,421 INFO L269 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-11-06 22:16:39,421 INFO L266 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-06 22:16:39,421 INFO L269 CegarLoopResult]: At program point mainENTRY(lines 37 44) the Hoare annotation is: true [2020-11-06 22:16:39,422 INFO L266 CegarLoopResult]: For program point mainEXIT(lines 37 44) no Hoare annotation was computed. [2020-11-06 22:16:39,422 INFO L266 CegarLoopResult]: For program point mainFINAL(lines 37 44) no Hoare annotation was computed. [2020-11-06 22:16:39,422 INFO L262 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: false [2020-11-06 22:16:39,422 INFO L266 CegarLoopResult]: For program point L40(lines 40 42) no Hoare annotation was computed. [2020-11-06 22:16:39,422 INFO L266 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-11-06 22:16:39,422 INFO L262 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= main_~x~0 5) (<= 5 main_~x~0)) [2020-11-06 22:16:39,422 INFO L266 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-11-06 22:16:39,422 INFO L266 CegarLoopResult]: For program point L40-2(lines 40 42) no Hoare annotation was computed. [2020-11-06 22:16:39,422 INFO L269 CegarLoopResult]: At program point fibo2ENTRY(lines 19 27) the Hoare annotation is: true [2020-11-06 22:16:39,422 INFO L262 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 2))) [2020-11-06 22:16:39,422 INFO L266 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-11-06 22:16:39,423 INFO L262 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: (and (or (not (<= |fibo2_#in~n| 4)) (and (<= |fibo2_#t~ret9| 2) (<= 4 |fibo2_#in~n|) (<= 2 |fibo2_#t~ret9|)) (and (<= 3 |fibo2_#in~n|) (<= fibo2_~n 3) (<= |fibo2_#t~ret9| 1) (<= 1 |fibo2_#t~ret9|))) (= fibo2_~n |fibo2_#in~n|)) [2020-11-06 22:16:39,423 INFO L266 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-11-06 22:16:39,423 INFO L266 CegarLoopResult]: For program point L25-3(line 25) no Hoare annotation was computed. [2020-11-06 22:16:39,423 INFO L266 CegarLoopResult]: For program point L20(lines 20 26) no Hoare annotation was computed. [2020-11-06 22:16:39,423 INFO L266 CegarLoopResult]: For program point fibo2FINAL(lines 19 27) no Hoare annotation was computed. [2020-11-06 22:16:39,423 INFO L266 CegarLoopResult]: For program point fibo2EXIT(lines 19 27) no Hoare annotation was computed. [2020-11-06 22:16:39,423 INFO L269 CegarLoopResult]: At program point fibo1ENTRY(lines 9 17) the Hoare annotation is: true [2020-11-06 22:16:39,423 INFO L262 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 1)) (= fibo1_~n |fibo1_#in~n|)) [2020-11-06 22:16:39,423 INFO L266 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-11-06 22:16:39,424 INFO L262 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= 3 |fibo1_#t~ret7|) .cse0 (<= |fibo1_#t~ret7| 3)) (and .cse0 (<= |fibo1_#in~n| 4)) (and .cse0 (<= 6 |fibo1_#in~n|)))) (<= 2 |fibo1_#in~n|) (or (and (<= 1 |fibo1_#t~ret7|) (<= |fibo1_#in~n| 2) (<= |fibo1_#t~ret7| 1)) (not (<= |fibo1_#in~n| 3)))) [2020-11-06 22:16:39,424 INFO L266 CegarLoopResult]: For program point L12(lines 12 16) no Hoare annotation was computed. [2020-11-06 22:16:39,424 INFO L266 CegarLoopResult]: For program point L15-3(line 15) no Hoare annotation was computed. [2020-11-06 22:16:39,424 INFO L266 CegarLoopResult]: For program point fibo1FINAL(lines 9 17) no Hoare annotation was computed. [2020-11-06 22:16:39,424 INFO L266 CegarLoopResult]: For program point L10(lines 10 16) no Hoare annotation was computed. [2020-11-06 22:16:39,424 INFO L266 CegarLoopResult]: For program point fibo1EXIT(lines 9 17) no Hoare annotation was computed. [2020-11-06 22:16:39,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:16:39 BoogieIcfgContainer [2020-11-06 22:16:39,429 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:16:39,431 INFO L168 Benchmark]: Toolchain (without parser) took 32405.66 ms. Allocated memory was 154.1 MB in the beginning and 323.0 MB in the end (delta: 168.8 MB). Free memory was 129.3 MB in the beginning and 158.1 MB in the end (delta: -28.8 MB). Peak memory consumption was 186.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:16:39,431 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 154.1 MB. Free memory was 125.2 MB in the beginning and 125.1 MB in the end (delta: 95.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:16:39,432 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.29 ms. Allocated memory is still 154.1 MB. Free memory was 128.6 MB in the beginning and 119.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:16:39,432 INFO L168 Benchmark]: Boogie Preprocessor took 59.44 ms. Allocated memory is still 154.1 MB. Free memory was 119.4 MB in the beginning and 118.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:16:39,433 INFO L168 Benchmark]: RCFGBuilder took 475.60 ms. Allocated memory is still 154.1 MB. Free memory was 117.9 MB in the beginning and 103.9 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:16:39,433 INFO L168 Benchmark]: TraceAbstraction took 31523.70 ms. Allocated memory was 154.1 MB in the beginning and 323.0 MB in the end (delta: 168.8 MB). Free memory was 103.4 MB in the beginning and 158.1 MB in the end (delta: -54.6 MB). Peak memory consumption was 160.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:16:39,436 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 154.1 MB. Free memory was 125.2 MB in the beginning and 125.1 MB in the end (delta: 95.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 331.29 ms. Allocated memory is still 154.1 MB. Free memory was 128.6 MB in the beginning and 119.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 59.44 ms. Allocated memory is still 154.1 MB. Free memory was 119.4 MB in the beginning and 118.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 475.60 ms. Allocated memory is still 154.1 MB. Free memory was 117.9 MB in the beginning and 103.9 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 31523.70 ms. Allocated memory was 154.1 MB in the beginning and 323.0 MB in the end (delta: 168.8 MB). Free memory was 103.4 MB in the beginning and 158.1 MB in the end (delta: -54.6 MB). Peak memory consumption was 160.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 4]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 28.4s, OverallIterations: 14, TraceHistogramMax: 11, AutomataDifference: 17.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.9s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 432 SDtfs, 1026 SDslu, 1391 SDs, 0 SdLazy, 6526 SolverSat, 1019 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1721 GetRequests, 1322 SyntacticMatches, 10 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2449 ImplicationChecksByTransitivity, 12.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=121occurred in iteration=11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 127 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 13 LocationsWithAnnotation, 533 PreInvPairs, 718 NumberOfFragments, 137 HoareAnnotationTreeSize, 533 FomulaSimplifications, 20564 FormulaSimplificationTreeSizeReduction, 1.2s HoareSimplificationTime, 13 FomulaSimplificationsInter, 9974 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 5.8s InterpolantComputationTime, 2117 NumberOfCodeBlocks, 2047 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 2091 ConstructedInterpolants, 0 QuantifiedInterpolants, 450479 SizeOfPredicates, 53 NumberOfNonLiveVariables, 2809 ConjunctsInSsa, 167 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 3460/4836 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 correct! Received shutdown request...