/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/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:01:19,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:01:19,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:01:19,653 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 22:01:19,710 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 22:01:19,722 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:01:19,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:01:19,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:01:19,724 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:01:19,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:01:19,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:01:19,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:01:19,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:01:19,725 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:01:19,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:01:19,725 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:01:19,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:01:19,725 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:01:19,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:01:19,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:01:19,726 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:01:19,726 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:01:19,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:01:19,727 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:01:19,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:01:19,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:01:19,727 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:01:19,727 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:01:20,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:01:20,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:01:20,142 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:01:20,143 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:01:20,149 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:01:20,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2020-10-23 22:01:20,243 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35c94753f/da58178e76d741c9b90cdf1c80790bb3/FLAG6d461ea97 [2020-10-23 22:01:20,951 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:01:20,952 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2020-10-23 22:01:20,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35c94753f/da58178e76d741c9b90cdf1c80790bb3/FLAG6d461ea97 [2020-10-23 22:01:21,312 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35c94753f/da58178e76d741c9b90cdf1c80790bb3 [2020-10-23 22:01:21,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:01:21,324 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:01:21,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:01:21,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:01:21,333 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:01:21,334 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:01:21" (1/1) ... [2020-10-23 22:01:21,338 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a20cbf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:21, skipping insertion in model container [2020-10-23 22:01:21,338 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:01:21" (1/1) ... [2020-10-23 22:01:21,348 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:01:21,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:01:21,541 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:01:21,549 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:01:21,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:01:21,585 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:01:21,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:21 WrapperNode [2020-10-23 22:01:21,585 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:01:21,587 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:01:21,587 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:01:21,587 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:01:21,600 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:21" (1/1) ... [2020-10-23 22:01:21,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:21" (1/1) ... [2020-10-23 22:01:21,608 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:21" (1/1) ... [2020-10-23 22:01:21,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:21" (1/1) ... [2020-10-23 22:01:21,613 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:21" (1/1) ... [2020-10-23 22:01:21,618 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:21" (1/1) ... [2020-10-23 22:01:21,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:21" (1/1) ... [2020-10-23 22:01:21,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:01:21,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:01:21,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:01:21,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:01:21,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:21" (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 22:01:21,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:01:21,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:01:21,708 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:01:21,708 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 22:01:21,708 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 22:01:21,708 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:01:21,709 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:01:21,709 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:01:21,709 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 22:01:21,709 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 22:01:21,709 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:01:21,710 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:01:21,710 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 22:01:21,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 22:01:21,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 22:01:21,710 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:01:21,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:01:21,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:01:21,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:01:21,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:01:21,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:01:21,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:01:21,962 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:01:21,963 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 22:01:21,966 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:01:21 BoogieIcfgContainer [2020-10-23 22:01:21,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:01:21,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:01:21,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:01:21,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:01:21,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:01:21" (1/3) ... [2020-10-23 22:01:21,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cbfcd77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:01:21, skipping insertion in model container [2020-10-23 22:01:21,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:01:21" (2/3) ... [2020-10-23 22:01:21,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cbfcd77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:01:21, skipping insertion in model container [2020-10-23 22:01:21,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:01:21" (3/3) ... [2020-10-23 22:01:21,977 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2020-10-23 22:01:22,013 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:01:22,019 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:01:22,044 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:01:22,083 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:01:22,083 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:01:22,084 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:01:22,084 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:01:22,084 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:01:22,084 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:01:22,084 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:01:22,085 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:01:22,119 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-10-23 22:01:22,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 22:01:22,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:01:22,139 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] [2020-10-23 22:01:22,140 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:01:22,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:01:22,157 INFO L82 PathProgramCache]: Analyzing trace with hash -24480081, now seen corresponding path program 1 times [2020-10-23 22:01:22,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:01:22,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470506820] [2020-10-23 22:01:22,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:01:22,255 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:01:22,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:01:22,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:01:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:01:22,640 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 22:01:22,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470506820] [2020-10-23 22:01:22,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:01:22,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 22:01:22,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310755549] [2020-10-23 22:01:22,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 22:01:22,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:01:22,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 22:01:22,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 22:01:22,672 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-10-23 22:01:22,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:01:22,814 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-10-23 22:01:22,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 22:01:22,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-10-23 22:01:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:01:22,844 INFO L225 Difference]: With dead ends: 57 [2020-10-23 22:01:22,844 INFO L226 Difference]: Without dead ends: 33 [2020-10-23 22:01:22,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 22:01:22,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-23 22:01:22,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-23 22:01:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-23 22:01:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-10-23 22:01:22,939 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 23 [2020-10-23 22:01:22,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:01:22,941 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-10-23 22:01:22,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 22:01:22,942 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-10-23 22:01:22,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-23 22:01:22,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:01:22,944 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] [2020-10-23 22:01:22,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:01:22,944 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:01:22,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:01:22,946 INFO L82 PathProgramCache]: Analyzing trace with hash -452133408, now seen corresponding path program 1 times [2020-10-23 22:01:22,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:01:22,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617896729] [2020-10-23 22:01:22,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:01:22,961 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:01:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:01:23,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:01:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:01:23,164 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 22:01:23,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617896729] [2020-10-23 22:01:23,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:01:23,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 22:01:23,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925914353] [2020-10-23 22:01:23,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 22:01:23,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:01:23,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 22:01:23,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 22:01:23,170 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 6 states. [2020-10-23 22:01:23,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:01:23,449 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-10-23 22:01:23,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 22:01:23,450 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-23 22:01:23,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:01:23,452 INFO L225 Difference]: With dead ends: 50 [2020-10-23 22:01:23,452 INFO L226 Difference]: Without dead ends: 40 [2020-10-23 22:01:23,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 22:01:23,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-23 22:01:23,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-23 22:01:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 22:01:23,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-23 22:01:23,467 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 23 [2020-10-23 22:01:23,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:01:23,467 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-23 22:01:23,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 22:01:23,468 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-23 22:01:23,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-23 22:01:23,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:01:23,469 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] [2020-10-23 22:01:23,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:01:23,469 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:01:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:01:23,470 INFO L82 PathProgramCache]: Analyzing trace with hash 645263993, now seen corresponding path program 1 times [2020-10-23 22:01:23,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:01:23,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496859776] [2020-10-23 22:01:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:01:26,217 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-23 22:01:26,225 INFO L309 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-10-23 22:01:26,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 22:01:26,261 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 22:01:26,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 22:01:26,291 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 22:01:26,317 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 22:01:26,317 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 22:01:26,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:01:26,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 10:01:26 BoogieIcfgContainer [2020-10-23 22:01:26,333 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 22:01:26,335 INFO L168 Benchmark]: Toolchain (without parser) took 5016.15 ms. Allocated memory is still 151.0 MB. Free memory was 127.5 MB in the beginning and 123.8 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.7 MB. Max. memory is 8.0 GB. [2020-10-23 22:01:26,336 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 125.8 MB. Free memory is still 102.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 22:01:26,337 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.38 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 22:01:26,338 INFO L168 Benchmark]: Boogie Preprocessor took 35.83 ms. Allocated memory is still 151.0 MB. Free memory was 117.6 MB in the beginning and 116.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 22:01:26,338 INFO L168 Benchmark]: RCFGBuilder took 342.97 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 101.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-23 22:01:26,339 INFO L168 Benchmark]: TraceAbstraction took 4364.67 ms. Allocated memory is still 151.0 MB. Free memory was 101.1 MB in the beginning and 123.8 MB in the end (delta: -22.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 22:01:26,343 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 125.8 MB. Free memory is still 102.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 257.38 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.83 ms. Allocated memory is still 151.0 MB. Free memory was 117.6 MB in the beginning and 116.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 342.97 ms. Allocated memory is still 151.0 MB. Free memory was 116.0 MB in the beginning and 101.5 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4364.67 ms. Allocated memory is still 151.0 MB. Free memory was 101.1 MB in the beginning and 123.8 MB in the end (delta: -22.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L25] int x = 0; [L26] int m = 0; [L27] int n = __VERIFIER_nondet_int(); [L28] COND TRUE x < n [L29] COND TRUE __VERIFIER_nondet_int() [L30] m = x [L32] x = x + 1 [L28] COND FALSE !(x < n) [L34] CALL __VERIFIER_assert((m >= 0 || n <= 0)) [L18] COND TRUE !(cond) [L19] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "assert.h", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.2s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 70 SDtfs, 67 SDslu, 47 SDs, 0 SdLazy, 80 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 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 proved your program to be incorrect! Received shutdown request...