/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/nla-digbench/geo1-u.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:43:57,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:43:57,636 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:43:57,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:43:57,685 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:43:57,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:43:57,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:43:57,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:43:57,691 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:43:57,692 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:43:57,695 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:43:57,701 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:43:57,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:43:57,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:43:57,706 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:43:57,707 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:43:57,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:43:57,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:43:57,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:43:57,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:43:57,722 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 13:43:57,756 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:43:57,756 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:43:57,757 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:43:57,757 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:43:57,757 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:43:57,758 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:43:57,758 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:43:57,758 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:43:57,758 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:43:57,758 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:43:57,758 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:43:57,758 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:43:57,758 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:43:57,759 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:43:57,759 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:43:57,759 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:43:57,759 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:43:57,759 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:43:57,759 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:43:57,759 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:43:57,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:43:57,760 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:43:57,760 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:43:57,760 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:43:57,760 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:43:57,760 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:43:57,760 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:43:57,761 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:43:57,761 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:43:58,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:43:58,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:43:58,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:43:58,063 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:43:58,064 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:43:58,064 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/geo1-u.c [2021-05-02 13:43:58,123 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81c7576f0/226b53ea93c449b0957946101be70f52/FLAG63ffe8278 [2021-05-02 13:43:58,461 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:43:58,461 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo1-u.c [2021-05-02 13:43:58,466 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81c7576f0/226b53ea93c449b0957946101be70f52/FLAG63ffe8278 [2021-05-02 13:43:58,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/81c7576f0/226b53ea93c449b0957946101be70f52 [2021-05-02 13:43:58,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:43:58,869 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:43:58,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:43:58,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:43:58,874 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:43:58,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:43:58" (1/1) ... [2021-05-02 13:43:58,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@175529f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:58, skipping insertion in model container [2021-05-02 13:43:58,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:43:58" (1/1) ... [2021-05-02 13:43:58,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:43:58,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:43:58,977 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo1-u.c[563,576] [2021-05-02 13:43:58,986 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:43:58,992 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:43:59,002 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/geo1-u.c[563,576] [2021-05-02 13:43:59,006 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:43:59,038 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:43:59,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:59 WrapperNode [2021-05-02 13:43:59,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:43:59,039 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:43:59,039 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:43:59,039 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:43:59,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:59" (1/1) ... [2021-05-02 13:43:59,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:59" (1/1) ... [2021-05-02 13:43:59,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:59" (1/1) ... [2021-05-02 13:43:59,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:59" (1/1) ... [2021-05-02 13:43:59,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:59" (1/1) ... [2021-05-02 13:43:59,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:59" (1/1) ... [2021-05-02 13:43:59,091 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:59" (1/1) ... [2021-05-02 13:43:59,093 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:43:59,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:43:59,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:43:59,094 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:43:59,094 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:59" (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 13:43:59,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:43:59,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:43:59,173 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:43:59,174 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:43:59,174 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:43:59,174 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:43:59,175 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:43:59,175 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:43:59,175 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:43:59,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:43:59,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_int [2021-05-02 13:43:59,176 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:43:59,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:43:59,177 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:43:59,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:43:59,177 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:43:59,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:43:59,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:43:59,178 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:43:59,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:43:59,451 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:43:59,451 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:43:59,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:43:59 BoogieIcfgContainer [2021-05-02 13:43:59,452 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:43:59,454 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:43:59,454 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:43:59,456 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:43:59,456 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:43:58" (1/3) ... [2021-05-02 13:43:59,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fc8be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:43:59, skipping insertion in model container [2021-05-02 13:43:59,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:43:59" (2/3) ... [2021-05-02 13:43:59,457 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9fc8be2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:43:59, skipping insertion in model container [2021-05-02 13:43:59,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:43:59" (3/3) ... [2021-05-02 13:43:59,458 INFO L111 eAbstractionObserver]: Analyzing ICFG geo1-u.c [2021-05-02 13:43:59,462 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:43:59,465 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:43:59,478 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:43:59,494 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:43:59,494 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:43:59,494 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:43:59,494 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:43:59,494 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:43:59,495 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:43:59,495 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:43:59,495 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:43:59,506 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 13:43:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 13:43:59,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:43:59,509 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:43:59,510 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:43:59,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:43:59,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1656896310, now seen corresponding path program 1 times [2021-05-02 13:43:59,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:43:59,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292968941] [2021-05-02 13:43:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:43:59,593 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:43:59,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084104811] [2021-05-02 13:43:59,594 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 [2021-05-02 13:43:59,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:43:59,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 13:43:59,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:43:59,790 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 13:43:59,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:43:59,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292968941] [2021-05-02 13:43:59,791 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:43:59,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084104811] [2021-05-02 13:43:59,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084104811] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:43:59,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:43:59,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 13:43:59,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723784995] [2021-05-02 13:43:59,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 13:43:59,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:43:59,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 13:43:59,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 13:43:59,807 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:43:59,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:43:59,855 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2021-05-02 13:43:59,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 13:43:59,856 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 13:43:59,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:43:59,862 INFO L225 Difference]: With dead ends: 46 [2021-05-02 13:43:59,862 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 13:43:59,864 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:43:59,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 13:43:59,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-05-02 13:43:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 13:43:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-05-02 13:43:59,894 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2021-05-02 13:43:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:43:59,894 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-05-02 13:43:59,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 13:43:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-05-02 13:43:59,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 13:43:59,895 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:43:59,895 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:44:00,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 13:44:00,117 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:44:00,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:44:00,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1736942409, now seen corresponding path program 1 times [2021-05-02 13:44:00,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:44:00,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332386887] [2021-05-02 13:44:00,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:44:00,133 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:44:00,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023870763] [2021-05-02 13:44:00,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:00,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 13:44:00,181 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 13:44:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 13:44:00,195 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 13:44:00,220 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 13:44:00,221 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 13:44:00,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:44:00,463 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:44:00 BoogieIcfgContainer [2021-05-02 13:44:00,464 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:44:00,465 INFO L168 Benchmark]: Toolchain (without parser) took 1595.28 ms. Allocated memory is still 211.8 MB. Free memory was 175.7 MB in the beginning and 128.9 MB in the end (delta: 46.8 MB). Peak memory consumption was 46.8 MB. Max. memory is 8.0 GB. [2021-05-02 13:44:00,465 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 211.8 MB. Free memory is still 191.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:44:00,465 INFO L168 Benchmark]: CACSL2BoogieTranslator took 168.10 ms. Allocated memory is still 211.8 MB. Free memory was 175.5 MB in the beginning and 196.0 MB in the end (delta: -20.5 MB). Peak memory consumption was 16.4 MB. Max. memory is 8.0 GB. [2021-05-02 13:44:00,466 INFO L168 Benchmark]: Boogie Preprocessor took 53.86 ms. Allocated memory is still 211.8 MB. Free memory was 196.0 MB in the beginning and 194.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:44:00,466 INFO L168 Benchmark]: RCFGBuilder took 358.96 ms. Allocated memory is still 211.8 MB. Free memory was 194.1 MB in the beginning and 179.2 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 13:44:00,467 INFO L168 Benchmark]: TraceAbstraction took 1010.06 ms. Allocated memory is still 211.8 MB. Free memory was 178.7 MB in the beginning and 128.9 MB in the end (delta: 49.8 MB). Peak memory consumption was 49.3 MB. Max. memory is 8.0 GB. [2021-05-02 13:44:00,469 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 211.8 MB. Free memory is still 191.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 168.10 ms. Allocated memory is still 211.8 MB. Free memory was 175.5 MB in the beginning and 196.0 MB in the end (delta: -20.5 MB). Peak memory consumption was 16.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 53.86 ms. Allocated memory is still 211.8 MB. Free memory was 196.0 MB in the beginning and 194.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 358.96 ms. Allocated memory is still 211.8 MB. Free memory was 194.1 MB in the beginning and 179.2 MB in the end (delta: 14.9 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1010.06 ms. Allocated memory is still 211.8 MB. Free memory was 178.7 MB in the beginning and 128.9 MB in the end (delta: 49.8 MB). Peak memory consumption was 49.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] unsigned int z, k; [L24] long long x, y, c; [L25] z = __VERIFIER_nondet_unsigned_int() [L26] k = __VERIFIER_nondet_unsigned_int() [L28] x = 1 [L29] y = z [L30] c = 1 VAL [c=1, x=1, y=0, z=0] [L32] COND TRUE 1 VAL [c=1, x=1, y=0, z=0] [L33] CALL __VERIFIER_assert(x*z - x - y + 1 == 0) VAL [\old(cond)=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1] [L33] RET __VERIFIER_assert(x*z - x - y + 1 == 0) VAL [c=1, x=1, y=0, z=0] [L35] COND TRUE !(c < k) VAL [c=1, k=0, x=1, y=0, z=0] [L44] x = x * (z - 1) VAL [c=1, k=0, x=4294967295, y=0, z=0] [L46] CALL __VERIFIER_assert(1 + x - y == 0) VAL [\old(cond)=0] [L16] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L18] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 950.8ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 6.4ms, AutomataDifference: 67.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19 SDtfs, 6 SDslu, 54 SDs, 0 SdLazy, 21 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 16.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=1, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 18.2ms AutomataMinimizationTime, 1 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 25.2ms SsaConstructionTime, 46.3ms SatisfiabilityAnalysisTime, 99.8ms InterpolantComputationTime, 29 NumberOfCodeBlocks, 29 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 30 SizeOfPredicates, 1 NumberOfNonLiveVariables, 89 ConjunctsInSsa, 10 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...