/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 0.2.0-7d8eed3 [2020-11-07 02:08:57,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 02:08:57,880 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 02:08:57,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-11-07 02:08:58,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 02:08:58,057 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 02:08:58,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 02:08:58,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 02:08:58,101 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 02:08:58,101 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 02:08:58,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 02:08:58,109 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 02:08:58,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 02:08:58,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 02:08:58,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 02:08:58,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 02:08:58,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 02:08:58,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 02:08:58,113 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 02:08:58,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 02:08:58,114 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 02:08:58,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 02:08:58,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 02:08:58,114 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 02:08:58,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 02:08:58,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 02:08:58,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 02:08:58,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 02:08:58,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 02:08:58,116 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 02:08:58,116 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 02:08:58,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 02:08:58,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 02:08:58,726 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 02:08:58,729 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 02:08:58,730 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 02:08:58,732 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2020-11-07 02:08:58,861 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6aa17f41/30b09cd0d4ba45e5bbfb1cdc1fa44dfe/FLAG16cc6d24c [2020-11-07 02:08:59,852 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 02:08:59,853 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007b.i [2020-11-07 02:08:59,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6aa17f41/30b09cd0d4ba45e5bbfb1cdc1fa44dfe/FLAG16cc6d24c [2020-11-07 02:09:00,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f6aa17f41/30b09cd0d4ba45e5bbfb1cdc1fa44dfe [2020-11-07 02:09:00,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 02:09:00,198 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 02:09:00,208 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 02:09:00,209 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 02:09:00,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 02:09:00,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:00" (1/1) ... [2020-11-07 02:09:00,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7687d36e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:00, skipping insertion in model container [2020-11-07 02:09:00,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 02:09:00" (1/1) ... [2020-11-07 02:09:00,236 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 02:09:00,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 02:09:00,498 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:09:00,517 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 02:09:00,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 02:09:00,575 INFO L208 MainTranslator]: Completed translation [2020-11-07 02:09:00,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:00 WrapperNode [2020-11-07 02:09:00,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 02:09:00,578 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 02:09:00,578 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 02:09:00,579 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 02:09:00,602 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:00" (1/1) ... [2020-11-07 02:09:00,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:00" (1/1) ... [2020-11-07 02:09:00,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:00" (1/1) ... [2020-11-07 02:09:00,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:00" (1/1) ... [2020-11-07 02:09:00,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:00" (1/1) ... [2020-11-07 02:09:00,634 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:00" (1/1) ... [2020-11-07 02:09:00,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:00" (1/1) ... [2020-11-07 02:09:00,640 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 02:09:00,642 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 02:09:00,642 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 02:09:00,643 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 02:09:00,645 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:00" (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 [2020-11-07 02:09:00,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 02:09:00,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 02:09:00,773 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 02:09:00,774 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-07 02:09:00,774 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 02:09:00,775 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 02:09:00,775 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 02:09:00,775 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 02:09:00,776 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 02:09:00,776 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 02:09:00,776 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 02:09:00,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 02:09:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-07 02:09:00,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 02:09:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-07 02:09:00,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 02:09:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 02:09:00,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 02:09:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 02:09:00,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 02:09:00,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 02:09:00,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 02:09:01,354 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 02:09:01,354 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-07 02:09:01,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:01 BoogieIcfgContainer [2020-11-07 02:09:01,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 02:09:01,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 02:09:01,362 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 02:09:01,368 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 02:09:01,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 02:09:00" (1/3) ... [2020-11-07 02:09:01,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486bd6e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:01, skipping insertion in model container [2020-11-07 02:09:01,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 02:09:00" (2/3) ... [2020-11-07 02:09:01,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@486bd6e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 02:09:01, skipping insertion in model container [2020-11-07 02:09:01,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 02:09:01" (3/3) ... [2020-11-07 02:09:01,373 INFO L111 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2020-11-07 02:09:01,399 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 02:09:01,405 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 02:09:01,424 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 02:09:01,463 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 02:09:01,463 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 02:09:01,464 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 02:09:01,464 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 02:09:01,464 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 02:09:01,464 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 02:09:01,465 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 02:09:01,465 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 02:09:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states. [2020-11-07 02:09:01,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-07 02:09:01,506 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:01,508 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] [2020-11-07 02:09:01,509 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:01,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:01,519 INFO L82 PathProgramCache]: Analyzing trace with hash -24480081, now seen corresponding path program 1 times [2020-11-07 02:09:01,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:01,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328785861] [2020-11-07 02:09:01,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:01,659 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:01,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:01,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:01,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:09:01,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328785861] [2020-11-07 02:09:01,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:01,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-07 02:09:01,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638909764] [2020-11-07 02:09:01,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-07 02:09:01,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:02,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-07 02:09:02,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 02:09:02,020 INFO L87 Difference]: Start difference. First operand 42 states. Second operand 3 states. [2020-11-07 02:09:02,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:02,252 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2020-11-07 02:09:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-07 02:09:02,255 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-11-07 02:09:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:02,270 INFO L225 Difference]: With dead ends: 57 [2020-11-07 02:09:02,271 INFO L226 Difference]: Without dead ends: 33 [2020-11-07 02:09:02,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-07 02:09:02,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-07 02:09:02,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-07 02:09:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-07 02:09:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-11-07 02:09:02,352 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 23 [2020-11-07 02:09:02,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:02,354 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-11-07 02:09:02,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-07 02:09:02,354 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-11-07 02:09:02,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-07 02:09:02,356 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:02,356 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] [2020-11-07 02:09:02,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 02:09:02,357 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:02,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:02,358 INFO L82 PathProgramCache]: Analyzing trace with hash -452133408, now seen corresponding path program 1 times [2020-11-07 02:09:02,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:02,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320017541] [2020-11-07 02:09:02,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:02,364 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:09:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:02,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:09:02,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:09:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 02:09:02,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320017541] [2020-11-07 02:09:02,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:02,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-07 02:09:02,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117434757] [2020-11-07 02:09:02,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-07 02:09:02,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:02,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-07 02:09:02,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-07 02:09:02,556 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 6 states. [2020-11-07 02:09:03,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:09:03,051 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-11-07 02:09:03,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-07 02:09:03,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-11-07 02:09:03,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:09:03,054 INFO L225 Difference]: With dead ends: 50 [2020-11-07 02:09:03,055 INFO L226 Difference]: Without dead ends: 40 [2020-11-07 02:09:03,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-11-07 02:09:03,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-07 02:09:03,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-11-07 02:09:03,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-11-07 02:09:03,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-11-07 02:09:03,078 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 23 [2020-11-07 02:09:03,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:09:03,078 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-11-07 02:09:03,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-07 02:09:03,079 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-11-07 02:09:03,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-07 02:09:03,080 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:09:03,081 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] [2020-11-07 02:09:03,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 02:09:03,082 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:09:03,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:09:03,083 INFO L82 PathProgramCache]: Analyzing trace with hash 645263993, now seen corresponding path program 1 times [2020-11-07 02:09:03,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:09:03,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43011327] [2020-11-07 02:09:03,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:09:03,772 WARN L194 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:09:06,045 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-11-07 02:09:06,074 INFO L316 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-11-07 02:09:06,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 02:09:06,157 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 02:09:06,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-07 02:09:06,195 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-07 02:09:06,241 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-11-07 02:09:06,242 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-07 02:09:06,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 02:09:06,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 02:09:06 BoogieIcfgContainer [2020-11-07 02:09:06,274 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-07 02:09:06,285 INFO L168 Benchmark]: Toolchain (without parser) took 6092.67 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 81.1 MB in the end (delta: 46.7 MB). Peak memory consumption was 47.6 MB. Max. memory is 8.0 GB. [2020-11-07 02:09:06,286 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 124.5 MB in the end (delta: 136.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-07 02:09:06,288 INFO L168 Benchmark]: CACSL2BoogieTranslator took 368.82 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 117.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-11-07 02:09:06,289 INFO L168 Benchmark]: Boogie Preprocessor took 62.90 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 115.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-07 02:09:06,291 INFO L168 Benchmark]: RCFGBuilder took 716.60 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 132.9 MB in the end (delta: -17.0 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-11-07 02:09:06,292 INFO L168 Benchmark]: TraceAbstraction took 4921.27 ms. Allocated memory is still 151.0 MB. Free memory was 132.4 MB in the beginning and 81.1 MB in the end (delta: 51.3 MB). Peak memory consumption was 51.3 MB. Max. memory is 8.0 GB. [2020-11-07 02:09:06,297 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 124.5 MB in the end (delta: 136.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 368.82 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 117.4 MB in the end (delta: 9.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 62.90 ms. Allocated memory is still 151.0 MB. Free memory was 117.3 MB in the beginning and 115.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 716.60 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 132.9 MB in the end (delta: -17.0 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4921.27 ms. Allocated memory is still 151.0 MB. Free memory was 132.4 MB in the beginning and 81.1 MB in the end (delta: 51.3 MB). Peak memory consumption was 51.3 MB. 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: 4.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.7s, 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, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s 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...