/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/id_b3_o2-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:19:21,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:19:21,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:19:21,873 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:19:21,874 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:19:21,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:19:21,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:19:21,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:19:21,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:19:21,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:19:21,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:19:21,904 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:19:21,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:19:21,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:19:21,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:19:21,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:19:21,914 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:19:21,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:19:21,947 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:19:21,957 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:19:21,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:19:21,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:19:21,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:19:21,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:19:21,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:19:21,987 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:19:21,988 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:19:21,989 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:19:21,990 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 22:19:22,044 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:19:22,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:19:22,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:19:22,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:19:22,047 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:19:22,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:19:22,047 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:19:22,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:19:22,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:19:22,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:19:22,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:19:22,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:19:22,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:19:22,049 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:19:22,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:19:22,049 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:19:22,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:19:22,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:19:22,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:19:22,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:19:22,050 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:19:22,050 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:19:22,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:19:22,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:19:22,051 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:19:22,051 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:19:22,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:19:22,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:19:22,052 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:19:22,052 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:19:22,484 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:19:22,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:19:22,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:19:22,525 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:19:22,526 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:19:22,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-11-06 22:19:22,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2b5eed15/e82fb3b3e8d34905b320028f0df0bdd8/FLAG6c6df3cd6 [2020-11-06 22:19:23,349 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:19:23,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b3_o2-2.c [2020-11-06 22:19:23,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2b5eed15/e82fb3b3e8d34905b320028f0df0bdd8/FLAG6c6df3cd6 [2020-11-06 22:19:23,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2b5eed15/e82fb3b3e8d34905b320028f0df0bdd8 [2020-11-06 22:19:23,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:19:23,733 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:19:23,735 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:19:23,735 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:19:23,739 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:19:23,740 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:19:23" (1/1) ... [2020-11-06 22:19:23,744 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c14b9d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:23, skipping insertion in model container [2020-11-06 22:19:23,744 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:19:23" (1/1) ... [2020-11-06 22:19:23,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:19:23,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:19:23,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:19:23,960 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:19:23,978 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:19:23,996 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:19:23,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:23 WrapperNode [2020-11-06 22:19:23,997 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:19:23,999 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:19:23,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:19:23,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:19:24,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:23" (1/1) ... [2020-11-06 22:19:24,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:23" (1/1) ... [2020-11-06 22:19:24,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:23" (1/1) ... [2020-11-06 22:19:24,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:23" (1/1) ... [2020-11-06 22:19:24,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:23" (1/1) ... [2020-11-06 22:19:24,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:23" (1/1) ... [2020-11-06 22:19:24,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:23" (1/1) ... [2020-11-06 22:19:24,033 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:19:24,034 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:19:24,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:19:24,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:19:24,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:23" (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 22:19:24,125 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:19:24,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:19:24,126 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:19:24,126 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-11-06 22:19:24,127 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:19:24,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:19:24,127 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:19:24,127 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:19:24,128 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:19:24,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:19:24,128 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-11-06 22:19:24,128 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:19:24,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:19:24,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:19:24,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:19:24,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:19:24,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:19:24,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:19:24,437 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:19:24,438 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 22:19:24,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:19:24 BoogieIcfgContainer [2020-11-06 22:19:24,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:19:24,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:19:24,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:19:24,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:19:24,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:19:23" (1/3) ... [2020-11-06 22:19:24,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1caa3063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:19:24, skipping insertion in model container [2020-11-06 22:19:24,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:19:23" (2/3) ... [2020-11-06 22:19:24,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1caa3063 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:19:24, skipping insertion in model container [2020-11-06 22:19:24,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:19:24" (3/3) ... [2020-11-06 22:19:24,452 INFO L111 eAbstractionObserver]: Analyzing ICFG id_b3_o2-2.c [2020-11-06 22:19:24,476 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:19:24,481 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:19:24,498 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:19:24,535 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:19:24,535 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:19:24,536 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:19:24,536 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:19:24,536 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:19:24,536 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:19:24,536 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:19:24,536 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:19:24,576 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-11-06 22:19:24,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:19:24,583 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:24,584 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:24,585 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:24,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1397195593, now seen corresponding path program 1 times [2020-11-06 22:19:24,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:24,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127199918] [2020-11-06 22:19:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:24,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:24,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:24,987 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 22:19:24,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127199918] [2020-11-06 22:19:24,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:24,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:19:24,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983371136] [2020-11-06 22:19:24,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:19:24,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:25,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:19:25,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:19:25,023 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 6 states. [2020-11-06 22:19:25,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:25,555 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-11-06 22:19:25,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:19:25,558 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-06 22:19:25,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:25,568 INFO L225 Difference]: With dead ends: 39 [2020-11-06 22:19:25,568 INFO L226 Difference]: Without dead ends: 21 [2020-11-06 22:19:25,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:25,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-06 22:19:25,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-06 22:19:25,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-06 22:19:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-11-06 22:19:25,621 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 15 [2020-11-06 22:19:25,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:25,622 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-11-06 22:19:25,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:19:25,622 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-11-06 22:19:25,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:19:25,624 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:25,625 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] [2020-11-06 22:19:25,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:19:25,625 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:25,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:25,626 INFO L82 PathProgramCache]: Analyzing trace with hash -630540429, now seen corresponding path program 1 times [2020-11-06 22:19:25,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:25,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651180216] [2020-11-06 22:19:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:25,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:25,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:25,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:25,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:25,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:19:25,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651180216] [2020-11-06 22:19:25,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:25,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:19:25,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681148795] [2020-11-06 22:19:25,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:19:25,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:25,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:19:25,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:19:25,828 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-11-06 22:19:26,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:26,038 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2020-11-06 22:19:26,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:19:26,039 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-11-06 22:19:26,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:26,041 INFO L225 Difference]: With dead ends: 34 [2020-11-06 22:19:26,041 INFO L226 Difference]: Without dead ends: 25 [2020-11-06 22:19:26,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:26,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-06 22:19:26,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-11-06 22:19:26,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-06 22:19:26,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-11-06 22:19:26,052 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 22 [2020-11-06 22:19:26,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:26,053 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-11-06 22:19:26,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:19:26,053 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-11-06 22:19:26,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:19:26,054 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:26,055 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] [2020-11-06 22:19:26,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:19:26,055 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:26,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:26,056 INFO L82 PathProgramCache]: Analyzing trace with hash 256963252, now seen corresponding path program 1 times [2020-11-06 22:19:26,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:26,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766440185] [2020-11-06 22:19:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:26,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:26,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:26,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:26,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:26,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:26,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:19:26,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766440185] [2020-11-06 22:19:26,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121297813] [2020-11-06 22:19:26,239 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 22:19:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:26,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:19:26,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:19:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-06 22:19:26,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:19:26,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-11-06 22:19:26,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469564158] [2020-11-06 22:19:26,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 22:19:26,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:26,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 22:19:26,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:19:26,402 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 10 states. [2020-11-06 22:19:26,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:26,702 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-11-06 22:19:26,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:19:26,703 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2020-11-06 22:19:26,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:26,704 INFO L225 Difference]: With dead ends: 30 [2020-11-06 22:19:26,704 INFO L226 Difference]: Without dead ends: 25 [2020-11-06 22:19:26,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:19:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-06 22:19:26,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-06 22:19:26,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-06 22:19:26,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-06 22:19:26,713 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 22 [2020-11-06 22:19:26,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:26,713 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-06 22:19:26,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 22:19:26,713 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-06 22:19:26,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:19:26,715 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:26,715 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:26,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:19:26,931 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:26,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:26,932 INFO L82 PathProgramCache]: Analyzing trace with hash 2059612612, now seen corresponding path program 1 times [2020-11-06 22:19:26,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:26,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216178463] [2020-11-06 22:19:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:27,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:19:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:27,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-11-06 22:19:27,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:27,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:27,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-11-06 22:19:27,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:19:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-11-06 22:19:27,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216178463] [2020-11-06 22:19:27,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:19:27,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:19:27,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936758077] [2020-11-06 22:19:27,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:19:27,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:19:27,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:19:27,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:19:27,076 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-11-06 22:19:27,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:19:27,275 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2020-11-06 22:19:27,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:19:27,276 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-11-06 22:19:27,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:19:27,278 INFO L225 Difference]: With dead ends: 32 [2020-11-06 22:19:27,278 INFO L226 Difference]: Without dead ends: 27 [2020-11-06 22:19:27,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:19:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-06 22:19:27,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2020-11-06 22:19:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-06 22:19:27,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-06 22:19:27,287 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 29 [2020-11-06 22:19:27,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:19:27,287 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-06 22:19:27,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:19:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-06 22:19:27,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:19:27,289 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:19:27,289 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:19:27,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 22:19:27,290 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:19:27,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:19:27,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1347851003, now seen corresponding path program 2 times [2020-11-06 22:19:27,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:19:27,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715996629] [2020-11-06 22:19:27,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:19:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:19:27,320 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:19:27,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:19:27,346 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:19:27,391 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:19:27,392 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:19:27,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 22:19:27,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:19:27 BoogieIcfgContainer [2020-11-06 22:19:27,458 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:19:27,461 INFO L168 Benchmark]: Toolchain (without parser) took 3731.84 ms. Allocated memory was 155.2 MB in the beginning and 189.8 MB in the end (delta: 34.6 MB). Free memory was 130.2 MB in the beginning and 133.1 MB in the end (delta: -2.9 MB). Peak memory consumption was 32.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:27,463 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 155.2 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:19:27,466 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.15 ms. Allocated memory is still 155.2 MB. Free memory was 129.6 MB in the beginning and 120.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:27,468 INFO L168 Benchmark]: Boogie Preprocessor took 34.54 ms. Allocated memory is still 155.2 MB. Free memory was 120.2 MB in the beginning and 119.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:27,474 INFO L168 Benchmark]: RCFGBuilder took 406.12 ms. Allocated memory is still 155.2 MB. Free memory was 119.0 MB in the beginning and 136.9 MB in the end (delta: -17.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:27,475 INFO L168 Benchmark]: TraceAbstraction took 3015.41 ms. Allocated memory was 155.2 MB in the beginning and 189.8 MB in the end (delta: 34.6 MB). Free memory was 136.4 MB in the beginning and 133.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 37.3 MB. Max. memory is 8.0 GB. [2020-11-06 22:19:27,486 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 155.2 MB. Free memory is still 127.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 263.15 ms. Allocated memory is still 155.2 MB. Free memory was 129.6 MB in the beginning and 120.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 34.54 ms. Allocated memory is still 155.2 MB. Free memory was 120.2 MB in the beginning and 119.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 406.12 ms. Allocated memory is still 155.2 MB. Free memory was 119.0 MB in the beginning and 136.9 MB in the end (delta: -17.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3015.41 ms. Allocated memory was 155.2 MB in the beginning and 189.8 MB in the end (delta: 34.6 MB). Free memory was 136.4 MB in the beginning and 133.1 MB in the end (delta: 3.2 MB). Peak memory consumption was 37.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L14] int input = __VERIFIER_nondet_int(); [L15] CALL, EXPR id(input) VAL [\old(x)=2] [L7] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L8] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=1] [L7] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L8] CALL, EXPR id((unsigned int)x-1) VAL [\old(x)=0] [L7] COND TRUE x==0 [L7] return 0; VAL [\old(x)=0, \result=0, x=0] [L8] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=1, id((unsigned int)x-1)=0, x=1] [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L8] RET, EXPR id((unsigned int)x-1) VAL [\old(x)=2, id((unsigned int)x-1)=1, x=2] [L8] int ret = id((unsigned int)x-1) + 1; [L9] COND FALSE !(ret > 3) [L10] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L15] RET, EXPR id(input) VAL [id(input)=2, input=2] [L15] int result = id(input); [L16] COND TRUE result == 2 VAL [input=2, result=2] [L17] CALL reach_error() [L4] __assert_fail("0", "id_b3_o2-2.c", 4, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.8s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 71 SDtfs, 61 SDslu, 113 SDs, 0 SdLazy, 245 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 139 NumberOfCodeBlocks, 139 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 5999 SizeOfPredicates, 2 NumberOfNonLiveVariables, 117 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 23/27 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...