/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/loop-lit/gcnr2008.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:46:21,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:46:21,857 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:46:21,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-06 22:46:21,919 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:46:21,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:46:21,924 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:46:21,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:46:21,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:46:21,928 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:46:21,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:46:21,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:46:21,943 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:46:21,944 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:46:21,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:46:21,948 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:46:21,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 22:46:21,983 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:46:21,984 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:46:21,984 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:46:21,986 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 22:46:22,042 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:46:22,042 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:46:22,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:46:22,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:46:22,047 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:46:22,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:46:22,047 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:46:22,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:46:22,048 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:46:22,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:46:22,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:46:22,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:46:22,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:46:22,050 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:46:22,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:46:22,050 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:46:22,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:46:22,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:46:22,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:46:22,051 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:46:22,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:46:22,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:46:22,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:46:22,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:46:22,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:46:22,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:46:22,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:46:22,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:46:22,053 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:46:22,053 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:46:22,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:46:22,475 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:46:22,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:46:22,480 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:46:22,480 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:46:22,481 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gcnr2008.i [2020-11-06 22:46:22,559 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33e718bd8/3a3bba548c324e0bbc11fccb08d6d200/FLAG875340945 [2020-11-06 22:46:23,131 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:46:23,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gcnr2008.i [2020-11-06 22:46:23,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33e718bd8/3a3bba548c324e0bbc11fccb08d6d200/FLAG875340945 [2020-11-06 22:46:23,501 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/33e718bd8/3a3bba548c324e0bbc11fccb08d6d200 [2020-11-06 22:46:23,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:46:23,522 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:46:23,527 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:23,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:46:23,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:46:23,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@501a87e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23, skipping insertion in model container [2020-11-06 22:46:23,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:46:23,560 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:46:23,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:23,734 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:46:23,753 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:46:23,775 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:46:23,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23 WrapperNode [2020-11-06 22:46:23,777 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:46:23,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:46:23,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:46:23,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:46:23,792 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,810 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (1/1) ... [2020-11-06 22:46:23,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:46:23,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:46:23,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:46:23,816 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:46:23,816 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (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 22:46:23,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:46:23,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:46:23,897 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:46:23,897 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 22:46:23,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:46:23,898 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:46:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:46:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:46:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:46:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:46:23,898 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:46:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:46:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 22:46:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:46:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:46:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:46:23,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:46:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:46:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:46:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:46:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:46:23,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:46:24,176 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:46:24,177 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:46:24,179 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:24 BoogieIcfgContainer [2020-11-06 22:46:24,179 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:46:24,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:46:24,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:46:24,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:46:24,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:46:23" (1/3) ... [2020-11-06 22:46:24,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66105d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:24, skipping insertion in model container [2020-11-06 22:46:24,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:46:23" (2/3) ... [2020-11-06 22:46:24,238 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66105d83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:46:24, skipping insertion in model container [2020-11-06 22:46:24,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:46:24" (3/3) ... [2020-11-06 22:46:24,240 INFO L111 eAbstractionObserver]: Analyzing ICFG gcnr2008.i [2020-11-06 22:46:24,297 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:46:24,307 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:46:24,325 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:46:24,378 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:46:24,378 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:46:24,378 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:46:24,378 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:46:24,378 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:46:24,378 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:46:24,378 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:46:24,379 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:46:24,409 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-11-06 22:46:24,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:46:24,421 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:24,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:24,423 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:24,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:24,437 INFO L82 PathProgramCache]: Analyzing trace with hash 2010393491, now seen corresponding path program 1 times [2020-11-06 22:46:24,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:24,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731245515] [2020-11-06 22:46:24,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:24,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:46:24,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:46:24,737 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 22:46:24,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731245515] [2020-11-06 22:46:24,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:46:24,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:46:24,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926779109] [2020-11-06 22:46:24,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:46:24,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:46:24,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:46:24,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:46:24,762 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-11-06 22:46:24,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:46:24,829 INFO L93 Difference]: Finished difference Result 44 states and 54 transitions. [2020-11-06 22:46:24,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:46:24,831 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-11-06 22:46:24,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:46:24,847 INFO L225 Difference]: With dead ends: 44 [2020-11-06 22:46:24,848 INFO L226 Difference]: Without dead ends: 20 [2020-11-06 22:46:24,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:46:24,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-06 22:46:24,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-06 22:46:24,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-06 22:46:24,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-11-06 22:46:24,909 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2020-11-06 22:46:24,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:46:24,910 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-11-06 22:46:24,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:46:24,910 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-11-06 22:46:24,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-06 22:46:24,911 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:46:24,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:46:24,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:46:24,912 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:46:24,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:46:24,915 INFO L82 PathProgramCache]: Analyzing trace with hash 2109254924, now seen corresponding path program 1 times [2020-11-06 22:46:24,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:46:24,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357298279] [2020-11-06 22:46:24,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:46:24,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:46:24,973 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:46:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:46:24,999 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:46:25,025 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:46:25,026 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:46:25,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:46:25,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:46:25 BoogieIcfgContainer [2020-11-06 22:46:25,055 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:46:25,058 INFO L168 Benchmark]: Toolchain (without parser) took 1539.90 ms. Allocated memory is still 151.0 MB. Free memory was 126.6 MB in the beginning and 105.9 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:25,059 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 124.7 MB in the end (delta: 77.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:46:25,060 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.43 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:25,061 INFO L168 Benchmark]: Boogie Preprocessor took 33.85 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:25,062 INFO L168 Benchmark]: RCFGBuilder took 363.82 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 100.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:46:25,063 INFO L168 Benchmark]: TraceAbstraction took 874.60 ms. Allocated memory is still 151.0 MB. Free memory was 99.7 MB in the beginning and 105.9 MB in the end (delta: -6.2 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:46:25,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 124.7 MB in the end (delta: 77.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.43 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.85 ms. Allocated memory is still 151.0 MB. Free memory was 116.3 MB in the beginning and 114.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 363.82 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 100.1 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 874.60 ms. Allocated memory is still 151.0 MB. Free memory was 99.7 MB in the beginning and 105.9 MB in the end (delta: -6.2 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L25] int x,y,z,w; [L26] EXPR w = 0 [L26] EXPR z = w = 0 [L26] EXPR y = z = w = 0 [L26] x = y = z = w = 0 VAL [w=0, x=0, y=0, z=0] [L27] COND FALSE !(__VERIFIER_nondet_int() && y < 10000) [L42] CALL __VERIFIER_assert(x >= 4 && y <= 2) VAL [\old(cond)=0] [L18] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L19] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "assert.h", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 29 SDtfs, 21 SDslu, 3 SDs, 0 SdLazy, 4 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 27 NumberOfCodeBlocks, 27 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 432 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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...