/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/trex01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 11:55:54,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 11:55:54,801 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 11:55:54,824 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 11:55:54,830 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 11:55:54,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 11:55:54,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 11:55:54,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 11:55:54,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 11:55:54,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 11:55:54,835 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 11:55:54,836 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 11:55:54,837 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 11:55:54,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 11:55:54,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 11:55:54,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 11:55:54,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 11:55:54,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 11:55:54,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 11:55:54,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 11:55:54,857 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 [2021-05-02 11:55:54,872 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 11:55:54,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 11:55:54,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 11:55:54,874 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 11:55:54,874 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 11:55:54,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 11:55:54,874 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 11:55:54,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 11:55:54,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 11:55:54,874 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 11:55:54,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 11:55:54,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 11:55:54,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 11:55:54,875 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 11:55:54,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 11:55:54,875 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 11:55:54,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 11:55:54,875 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 11:55:54,875 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 11:55:54,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 11:55:54,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 11:55:54,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 11:55:54,876 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 11:55:54,876 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 11:55:54,876 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 11:55:54,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 11:55:54,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 11:55:54,876 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 11:55:54,877 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 11:55:55,147 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 11:55:55,174 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 11:55:55,176 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 11:55:55,177 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 11:55:55,178 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 11:55:55,179 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex01-1.c [2021-05-02 11:55:55,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/792ae27fc/f7693c6b26ef400f9eac3f1012350121/FLAGc2ee3092e [2021-05-02 11:55:55,709 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 11:55:55,710 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-1.c [2021-05-02 11:55:55,715 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/792ae27fc/f7693c6b26ef400f9eac3f1012350121/FLAGc2ee3092e [2021-05-02 11:55:56,123 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/792ae27fc/f7693c6b26ef400f9eac3f1012350121 [2021-05-02 11:55:56,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 11:55:56,133 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 11:55:56,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 11:55:56,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 11:55:56,143 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 11:55:56,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:55:56" (1/1) ... [2021-05-02 11:55:56,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad4e9fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:55:56, skipping insertion in model container [2021-05-02 11:55:56,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:55:56" (1/1) ... [2021-05-02 11:55:56,149 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 11:55:56,162 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 11:55:56,298 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-1.c[320,333] [2021-05-02 11:55:56,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 11:55:56,328 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 11:55:56,339 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-1.c[320,333] [2021-05-02 11:55:56,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 11:55:56,362 INFO L208 MainTranslator]: Completed translation [2021-05-02 11:55:56,362 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:55:56 WrapperNode [2021-05-02 11:55:56,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 11:55:56,365 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 11:55:56,366 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 11:55:56,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 11:55:56,392 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:55:56" (1/1) ... [2021-05-02 11:55:56,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:55:56" (1/1) ... [2021-05-02 11:55:56,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:55:56" (1/1) ... [2021-05-02 11:55:56,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:55:56" (1/1) ... [2021-05-02 11:55:56,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:55:56" (1/1) ... [2021-05-02 11:55:56,445 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:55:56" (1/1) ... [2021-05-02 11:55:56,453 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:55:56" (1/1) ... [2021-05-02 11:55:56,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 11:55:56,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 11:55:56,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 11:55:56,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 11:55:56,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:55:56" (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 [2021-05-02 11:55:56,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 11:55:56,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 11:55:56,534 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 11:55:56,534 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 11:55:56,534 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-05-02 11:55:56,535 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 11:55:56,535 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 11:55:56,535 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 11:55:56,535 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 11:55:56,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 11:55:56,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 11:55:56,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-05-02 11:55:56,535 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 11:55:56,535 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-05-02 11:55:56,535 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 11:55:56,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 11:55:56,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 11:55:56,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 11:55:56,536 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 11:55:56,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 11:55:56,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 11:55:56,754 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 11:55:56,754 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 11:55:56,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:55:56 BoogieIcfgContainer [2021-05-02 11:55:56,755 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 11:55:56,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 11:55:56,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 11:55:56,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 11:55:56,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:55:56" (1/3) ... [2021-05-02 11:55:56,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c834d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:55:56, skipping insertion in model container [2021-05-02 11:55:56,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:55:56" (2/3) ... [2021-05-02 11:55:56,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54c834d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:55:56, skipping insertion in model container [2021-05-02 11:55:56,760 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:55:56" (3/3) ... [2021-05-02 11:55:56,761 INFO L111 eAbstractionObserver]: Analyzing ICFG trex01-1.c [2021-05-02 11:55:56,764 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 11:55:56,767 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 11:55:56,798 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 11:55:56,815 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 11:55:56,815 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 11:55:56,815 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 11:55:56,815 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 11:55:56,815 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 11:55:56,815 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 11:55:56,815 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 11:55:56,815 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 11:55:56,828 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 18 states have (on average 1.5) internal successors, (27), 21 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 11:55:56,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 11:55:56,831 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:55:56,832 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:55:56,832 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:55:56,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:55:56,836 INFO L82 PathProgramCache]: Analyzing trace with hash 172866924, now seen corresponding path program 1 times [2021-05-02 11:55:56,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:55:56,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090038613] [2021-05-02 11:55:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:55:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:55:57,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 11:55:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 11:55:57,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 11:55:57,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 11:55:57,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090038613] [2021-05-02 11:55:57,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090038613] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 11:55:57,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 11:55:57,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 11:55:57,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188023915] [2021-05-02 11:55:57,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 11:55:57,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 11:55:57,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 11:55:57,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 11:55:57,085 INFO L87 Difference]: Start difference. First operand has 29 states, 18 states have (on average 1.5) internal successors, (27), 21 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:55:57,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 11:55:57,145 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-05-02 11:55:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 11:55:57,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 11:55:57,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 11:55:57,152 INFO L225 Difference]: With dead ends: 46 [2021-05-02 11:55:57,153 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 11:55:57,156 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 11:55:57,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 11:55:57,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-02 11:55:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 5 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:55:57,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-05-02 11:55:57,193 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2021-05-02 11:55:57,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 11:55:57,194 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-05-02 11:55:57,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 11:55:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-05-02 11:55:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 11:55:57,195 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 11:55:57,195 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 11:55:57,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 11:55:57,196 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 11:55:57,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 11:55:57,197 INFO L82 PathProgramCache]: Analyzing trace with hash 169172840, now seen corresponding path program 1 times [2021-05-02 11:55:57,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 11:55:57,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804746239] [2021-05-02 11:55:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 11:55:57,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 11:55:57,238 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 11:55:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 11:55:57,250 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 11:55:57,267 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 11:55:57,267 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 11:55:57,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 11:55:57,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 11:55:57 BoogieIcfgContainer [2021-05-02 11:55:57,288 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 11:55:57,289 INFO L168 Benchmark]: Toolchain (without parser) took 1156.57 ms. Allocated memory is still 209.7 MB. Free memory was 174.4 MB in the beginning and 144.5 MB in the end (delta: 29.9 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. [2021-05-02 11:55:57,290 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 209.7 MB. Free memory was 191.1 MB in the beginning and 191.0 MB in the end (delta: 106.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 11:55:57,290 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.36 ms. Allocated memory is still 209.7 MB. Free memory was 174.2 MB in the beginning and 164.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 11:55:57,291 INFO L168 Benchmark]: Boogie Preprocessor took 91.34 ms. Allocated memory is still 209.7 MB. Free memory was 164.7 MB in the beginning and 192.8 MB in the end (delta: -28.0 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. [2021-05-02 11:55:57,291 INFO L168 Benchmark]: RCFGBuilder took 296.90 ms. Allocated memory is still 209.7 MB. Free memory was 192.8 MB in the beginning and 177.8 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 11:55:57,292 INFO L168 Benchmark]: TraceAbstraction took 532.06 ms. Allocated memory is still 209.7 MB. Free memory was 177.4 MB in the beginning and 144.5 MB in the end (delta: 32.9 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. [2021-05-02 11:55:57,293 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 209.7 MB. Free memory was 191.1 MB in the beginning and 191.0 MB in the end (delta: 106.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 228.36 ms. Allocated memory is still 209.7 MB. Free memory was 174.2 MB in the beginning and 164.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 91.34 ms. Allocated memory is still 209.7 MB. Free memory was 164.7 MB in the beginning and 192.8 MB in the end (delta: -28.0 MB). Peak memory consumption was 3.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 296.90 ms. Allocated memory is still 209.7 MB. Free memory was 192.8 MB in the beginning and 177.8 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 532.06 ms. Allocated memory is still 209.7 MB. Free memory was 177.4 MB in the beginning and 144.5 MB in the end (delta: 32.9 MB). Peak memory consumption was 32.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 7]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L36] _Bool c = __VERIFIER_nondet_bool(); [L37] COND TRUE \read(c) VAL [c=1] [L38] CALL f(1) VAL [\old(d)=1] [L15] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L15] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L15] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; [L15] int x = __VERIFIER_nondet_int(), y = __VERIFIER_nondet_int(), k = __VERIFIER_nondet_int(), z = 1; VAL [\old(d)=1, d=1, k=0, x=-2, y=-1, z=1] [L16] COND FALSE !(!(k <= 1073741823)) VAL [\old(d)=1, d=1, k=0, x=-2, y=-1, z=1] [L19] COND FALSE !(z < k) VAL [\old(d)=1, d=1, k=0, x=-2, y=-1, z=1] [L20] CALL __VERIFIER_assert(z>=2) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 455.6ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 6.4ms, AutomataDifference: 84.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30 SDtfs, 21 SDslu, 3 SDs, 0 SdLazy, 6 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 24.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.5ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 27.7ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 9.3ms SsaConstructionTime, 60.3ms SatisfiabilityAnalysisTime, 142.9ms InterpolantComputationTime, 30 NumberOfCodeBlocks, 30 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 14 ConstructedInterpolants, 0 QuantifiedInterpolants, 44 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...