/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/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:04:58,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:04:58,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:04:58,758 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 22:04:58,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 22:04:58,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 22:04:58,794 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 22:04:58,795 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 22:04:58,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 22:04:58,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 22:04:58,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 22:04:58,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 22:04:58,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 22:04:58,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 22:04:58,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 22:04:58,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 22:04:58,827 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 22:04:58,872 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:04:58,873 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:04:58,874 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:04:58,881 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 22:04:58,898 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:04:58,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:04:58,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:04:58,904 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:04:58,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:04:58,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:04:58,904 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:04:58,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:04:58,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:04:58,905 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:04:58,906 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:04:58,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:04:58,907 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:04:58,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:04:58,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:04:58,907 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:04:58,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:04:58,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:04:58,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:04:58,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:04:58,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:04:58,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:04:58,909 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:04:59,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:04:59,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:04:59,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:04:59,310 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:04:59,311 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:04:59,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2020-10-23 22:04:59,389 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94bd28429/ee18bf466b1043788de6af0476c12be3/FLAG4d284059b [2020-10-23 22:04:59,987 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:04:59,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps2.c [2020-10-23 22:04:59,998 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94bd28429/ee18bf466b1043788de6af0476c12be3/FLAG4d284059b [2020-10-23 22:05:00,341 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94bd28429/ee18bf466b1043788de6af0476c12be3 [2020-10-23 22:05:00,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:05:00,353 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:05:00,359 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:05:00,359 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:05:00,363 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:05:00,364 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:05:00" (1/1) ... [2020-10-23 22:05:00,367 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@751b3c67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:05:00, skipping insertion in model container [2020-10-23 22:05:00,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:05:00" (1/1) ... [2020-10-23 22:05:00,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:05:00,393 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:05:00,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:05:00,559 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:05:00,578 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:05:00,595 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:05:00,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:05:00 WrapperNode [2020-10-23 22:05:00,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:05:00,596 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:05:00,596 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:05:00,597 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:05:00,607 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:05:00" (1/1) ... [2020-10-23 22:05:00,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:05:00" (1/1) ... [2020-10-23 22:05:00,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:05:00" (1/1) ... [2020-10-23 22:05:00,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:05:00" (1/1) ... [2020-10-23 22:05:00,647 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:05:00" (1/1) ... [2020-10-23 22:05:00,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:05:00" (1/1) ... [2020-10-23 22:05:00,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:05:00" (1/1) ... [2020-10-23 22:05:00,675 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:05:00,676 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:05:00,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:05:00,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:05:00,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:05:00" (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 [2020-10-23 22:05:00,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:05:00,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:05:00,761 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:05:00,762 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 22:05:00,762 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 22:05:00,762 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:05:00,762 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:05:00,762 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:05:00,762 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:05:00,763 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:05:00,763 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 22:05:00,763 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 22:05:00,764 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 22:05:00,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:05:00,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:05:00,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:05:00,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:05:00,765 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:05:00,765 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:05:00,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:05:01,241 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:05:01,242 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 22:05:01,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:05:01 BoogieIcfgContainer [2020-10-23 22:05:01,246 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:05:01,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:05:01,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:05:01,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:05:01,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:05:00" (1/3) ... [2020-10-23 22:05:01,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39afe0b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:05:01, skipping insertion in model container [2020-10-23 22:05:01,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:05:00" (2/3) ... [2020-10-23 22:05:01,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39afe0b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:05:01, skipping insertion in model container [2020-10-23 22:05:01,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:05:01" (3/3) ... [2020-10-23 22:05:01,258 INFO L111 eAbstractionObserver]: Analyzing ICFG ps2.c [2020-10-23 22:05:01,271 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:05:01,276 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:05:01,290 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:05:01,325 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:05:01,326 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:05:01,326 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:05:01,326 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:05:01,326 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:05:01,326 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:05:01,326 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:05:01,327 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:05:01,346 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-10-23 22:05:01,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 22:05:01,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:05:01,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:05:01,357 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:05:01,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:05:01,368 INFO L82 PathProgramCache]: Analyzing trace with hash 146799458, now seen corresponding path program 1 times [2020-10-23 22:05:01,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:05:01,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298616333] [2020-10-23 22:05:01,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:05:01,440 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:05:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:05:01,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:05:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:05:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 22:05:01,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298616333] [2020-10-23 22:05:01,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:05:01,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 22:05:01,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16745471] [2020-10-23 22:05:01,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 22:05:01,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:05:01,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 22:05:01,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 22:05:01,715 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 3 states. [2020-10-23 22:05:01,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:05:01,854 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2020-10-23 22:05:01,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 22:05:01,856 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-10-23 22:05:01,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:05:01,866 INFO L225 Difference]: With dead ends: 68 [2020-10-23 22:05:01,866 INFO L226 Difference]: Without dead ends: 42 [2020-10-23 22:05:01,870 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 [2020-10-23 22:05:01,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-23 22:05:01,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-23 22:05:01,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-23 22:05:01,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-23 22:05:01,928 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 34 [2020-10-23 22:05:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:05:01,929 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-23 22:05:01,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 22:05:01,930 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-23 22:05:01,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-23 22:05:01,931 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:05:01,931 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:05:01,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:05:01,932 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:05:01,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:05:01,933 INFO L82 PathProgramCache]: Analyzing trace with hash -169968245, now seen corresponding path program 1 times [2020-10-23 22:05:01,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:05:01,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151506685] [2020-10-23 22:05:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:05:01,937 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:05:01,970 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-23 22:05:01,970 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 22:05:01,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:05:01,990 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-23 22:05:01,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 10:05:01 BoogieIcfgContainer [2020-10-23 22:05:01,990 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 22:05:01,993 INFO L168 Benchmark]: Toolchain (without parser) took 1644.13 ms. Allocated memory is still 151.0 MB. Free memory was 109.6 MB in the beginning and 82.4 MB in the end (delta: 27.2 MB). Peak memory consumption was 27.2 MB. Max. memory is 8.0 GB. [2020-10-23 22:05:01,994 INFO L168 Benchmark]: CDTParser took 3.11 ms. Allocated memory is still 151.0 MB. Free memory is still 126.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 22:05:01,995 INFO L168 Benchmark]: CACSL2BoogieTranslator took 236.59 ms. Allocated memory is still 151.0 MB. Free memory was 108.9 MB in the beginning and 99.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 22:05:01,996 INFO L168 Benchmark]: Boogie Preprocessor took 78.46 ms. Allocated memory is still 151.0 MB. Free memory was 99.5 MB in the beginning and 135.5 MB in the end (delta: -36.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2020-10-23 22:05:01,997 INFO L168 Benchmark]: RCFGBuilder took 570.29 ms. Allocated memory is still 151.0 MB. Free memory was 135.5 MB in the beginning and 119.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-23 22:05:01,998 INFO L168 Benchmark]: TraceAbstraction took 740.81 ms. Allocated memory is still 151.0 MB. Free memory was 119.4 MB in the beginning and 82.4 MB in the end (delta: 37.0 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. [2020-10-23 22:05:02,001 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 3.11 ms. Allocated memory is still 151.0 MB. Free memory is still 126.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 236.59 ms. Allocated memory is still 151.0 MB. Free memory was 108.9 MB in the beginning and 99.5 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 78.46 ms. Allocated memory is still 151.0 MB. Free memory was 99.5 MB in the beginning and 135.5 MB in the end (delta: -36.0 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 570.29 ms. Allocated memory is still 151.0 MB. Free memory was 135.5 MB in the beginning and 119.8 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 740.81 ms. Allocated memory is still 151.0 MB. Free memory was 119.4 MB in the beginning and 82.4 MB in the end (delta: 37.0 MB). Peak memory consumption was 36.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L18] int k, y, x, c; [L19] k = __VERIFIER_nondet_int() [L21] y = 0 [L22] x = 0 [L23] c = 0 [L25] COND TRUE 1 [L26] CALL __VERIFIER_assert((y * y) - 2 * x + y == 0) [L10] COND TRUE !(cond) [L12] CALL reach_error() [L3] __assert_fail("0", "ps2.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 46 SDtfs, 23 SDslu, 4 SDs, 0 SdLazy, 16 SolverSat, 4 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=49occurred 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: No data available, 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...