/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-invgen/id_build.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:00:25,495 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:00:25,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:00:25,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 22:00:25,551 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 22:00:25,552 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 22:00:25,554 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 22:00:25,555 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 22:00:25,556 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 22:00:25,558 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 22:00:25,560 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 22:00:25,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 22:00:25,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 22:00:25,566 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 22:00:25,568 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 22:00:25,569 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 22:00:25,573 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 22:00:25,584 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:00:25,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:00:25,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:00:25,588 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 22:00:25,600 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:00:25,601 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:00:25,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:00:25,603 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:00:25,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:00:25,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:00:25,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:00:25,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:00:25,605 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:00:25,605 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:00:25,605 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:00:25,606 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:00:25,606 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:00:25,607 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:00:25,607 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:00:25,607 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:00:25,608 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:00:25,608 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:00:25,608 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:00:25,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:00:25,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:00:25,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:00:25,610 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:00:25,994 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:00:26,023 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:00:26,026 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:00:26,028 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:00:26,029 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:00:26,030 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/id_build.i [2020-10-23 22:00:26,119 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d32f9183a/8c450d6f9b4c4ae79e25587e98cf33e7/FLAG75a1416d4 [2020-10-23 22:00:26,674 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:00:26,675 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/id_build.i [2020-10-23 22:00:26,682 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d32f9183a/8c450d6f9b4c4ae79e25587e98cf33e7/FLAG75a1416d4 [2020-10-23 22:00:27,061 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d32f9183a/8c450d6f9b4c4ae79e25587e98cf33e7 [2020-10-23 22:00:27,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:00:27,075 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:00:27,076 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:00:27,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:00:27,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:00:27,081 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:00:27" (1/1) ... [2020-10-23 22:00:27,085 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c34af26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:27, skipping insertion in model container [2020-10-23 22:00:27,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:00:27" (1/1) ... [2020-10-23 22:00:27,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:00:27,110 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:00:27,281 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:00:27,291 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:00:27,310 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:00:27,326 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:00:27,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:27 WrapperNode [2020-10-23 22:00:27,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:00:27,328 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:00:27,329 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:00:27,329 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:00:27,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:27" (1/1) ... [2020-10-23 22:00:27,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:27" (1/1) ... [2020-10-23 22:00:27,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:27" (1/1) ... [2020-10-23 22:00:27,349 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:27" (1/1) ... [2020-10-23 22:00:27,355 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:27" (1/1) ... [2020-10-23 22:00:27,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:27" (1/1) ... [2020-10-23 22:00:27,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:27" (1/1) ... [2020-10-23 22:00:27,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:00:27,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:00:27,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:00:27,366 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:00:27,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:27" (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 22:00:27,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:00:27,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:00:27,443 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:00:27,443 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 22:00:27,443 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 22:00:27,444 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:00:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:00:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:00:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 22:00:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 22:00:27,444 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:00:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:00:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 22:00:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 22:00:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 22:00:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:00:27,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:00:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:00:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:00:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:00:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:00:27,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:00:27,696 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:00:27,696 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-23 22:00:27,699 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:00:27 BoogieIcfgContainer [2020-10-23 22:00:27,699 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:00:27,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:00:27,702 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:00:27,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:00:27,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:00:27" (1/3) ... [2020-10-23 22:00:27,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c162e90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:00:27, skipping insertion in model container [2020-10-23 22:00:27,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:27" (2/3) ... [2020-10-23 22:00:27,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c162e90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:00:27, skipping insertion in model container [2020-10-23 22:00:27,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:00:27" (3/3) ... [2020-10-23 22:00:27,710 INFO L111 eAbstractionObserver]: Analyzing ICFG id_build.i [2020-10-23 22:00:27,724 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:00:27,730 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:00:27,746 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:00:27,801 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:00:27,801 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:00:27,801 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:00:27,801 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:00:27,801 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:00:27,802 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:00:27,802 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:00:27,802 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:00:27,843 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-23 22:00:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-23 22:00:27,860 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:27,862 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] [2020-10-23 22:00:27,862 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:27,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:27,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1115921713, now seen corresponding path program 1 times [2020-10-23 22:00:27,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:27,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897819049] [2020-10-23 22:00:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:28,010 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:00:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:28,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:00:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:28,373 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 22:00:28,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897819049] [2020-10-23 22:00:28,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:00:28,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 22:00:28,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311412673] [2020-10-23 22:00:28,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 22:00:28,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:00:28,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 22:00:28,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 22:00:28,404 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 6 states. [2020-10-23 22:00:28,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:00:28,750 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2020-10-23 22:00:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 22:00:28,752 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2020-10-23 22:00:28,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:00:28,761 INFO L225 Difference]: With dead ends: 75 [2020-10-23 22:00:28,761 INFO L226 Difference]: Without dead ends: 42 [2020-10-23 22:00:28,766 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 22:00:28,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-23 22:00:28,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-23 22:00:28,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-23 22:00:28,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-10-23 22:00:28,823 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 28 [2020-10-23 22:00:28,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:00:28,824 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-10-23 22:00:28,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 22:00:28,824 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-10-23 22:00:28,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-23 22:00:28,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:28,826 INFO L422 BasicCegarLoop]: trace histogram [2, 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 22:00:28,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:00:28,827 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:28,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1724895446, now seen corresponding path program 1 times [2020-10-23 22:00:28,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:28,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544106065] [2020-10-23 22:00:28,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:28,832 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:00:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:28,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:00:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:28,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-23 22:00:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:28,962 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 22:00:28,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544106065] [2020-10-23 22:00:28,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:00:28,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 22:00:28,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847153060] [2020-10-23 22:00:28,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 22:00:28,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:00:28,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 22:00:28,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 22:00:28,969 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 6 states. [2020-10-23 22:00:29,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:00:29,324 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2020-10-23 22:00:29,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 22:00:29,324 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-10-23 22:00:29,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:00:29,329 INFO L225 Difference]: With dead ends: 60 [2020-10-23 22:00:29,329 INFO L226 Difference]: Without dead ends: 56 [2020-10-23 22:00:29,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-23 22:00:29,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-23 22:00:29,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2020-10-23 22:00:29,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-23 22:00:29,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-10-23 22:00:29,377 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 33 [2020-10-23 22:00:29,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:00:29,378 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-10-23 22:00:29,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 22:00:29,379 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-10-23 22:00:29,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-23 22:00:29,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:29,383 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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 22:00:29,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:00:29,384 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:29,385 INFO L82 PathProgramCache]: Analyzing trace with hash -311170620, now seen corresponding path program 1 times [2020-10-23 22:00:29,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:29,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441702397] [2020-10-23 22:00:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:29,473 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:00:29,479 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:00:29,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:29,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:00:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:29,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-23 22:00:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:29,605 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 22:00:29,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441702397] [2020-10-23 22:00:29,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:00:29,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 22:00:29,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315420055] [2020-10-23 22:00:29,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 22:00:29,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:00:29,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 22:00:29,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 22:00:29,608 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 4 states. [2020-10-23 22:00:29,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:00:29,748 INFO L93 Difference]: Finished difference Result 87 states and 97 transitions. [2020-10-23 22:00:29,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 22:00:29,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-23 22:00:29,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:00:29,751 INFO L225 Difference]: With dead ends: 87 [2020-10-23 22:00:29,751 INFO L226 Difference]: Without dead ends: 64 [2020-10-23 22:00:29,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 22:00:29,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-23 22:00:29,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2020-10-23 22:00:29,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-23 22:00:29,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2020-10-23 22:00:29,789 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 39 [2020-10-23 22:00:29,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:00:29,790 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2020-10-23 22:00:29,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 22:00:29,792 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2020-10-23 22:00:29,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-23 22:00:29,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:29,794 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 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 22:00:29,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:00:29,795 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:29,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:29,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2071585797, now seen corresponding path program 1 times [2020-10-23 22:00:29,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:29,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949462220] [2020-10-23 22:00:29,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:29,803 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:266) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:227) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:147) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-23 22:00:29,814 INFO L168 Benchmark]: Toolchain (without parser) took 2739.02 ms. Allocated memory was 151.0 MB in the beginning and 197.1 MB in the end (delta: 46.1 MB). Free memory was 127.0 MB in the beginning and 116.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 57.0 MB. Max. memory is 8.0 GB. [2020-10-23 22:00:29,814 INFO L168 Benchmark]: CDTParser took 1.17 ms. Allocated memory is still 151.0 MB. Free memory is still 129.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 22:00:29,816 INFO L168 Benchmark]: CACSL2BoogieTranslator took 251.27 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 22:00:29,818 INFO L168 Benchmark]: Boogie Preprocessor took 36.07 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 22:00:29,820 INFO L168 Benchmark]: RCFGBuilder took 334.21 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 100.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-23 22:00:29,821 INFO L168 Benchmark]: TraceAbstraction took 2106.00 ms. Allocated memory was 151.0 MB in the beginning and 197.1 MB in the end (delta: 46.1 MB). Free memory was 99.9 MB in the beginning and 116.9 MB in the end (delta: -17.0 MB). Peak memory consumption was 29.8 MB. Max. memory is 8.0 GB. [2020-10-23 22:00:29,824 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.17 ms. Allocated memory is still 151.0 MB. Free memory is still 129.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 251.27 ms. Allocated memory is still 151.0 MB. Free memory was 126.5 MB in the beginning and 117.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.07 ms. Allocated memory is still 151.0 MB. Free memory was 117.1 MB in the beginning and 115.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 334.21 ms. Allocated memory is still 151.0 MB. Free memory was 115.5 MB in the beginning and 100.3 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2106.00 ms. Allocated memory was 151.0 MB in the beginning and 197.1 MB in the end (delta: 46.1 MB). Free memory was 99.9 MB in the beginning and 116.9 MB in the end (delta: -17.0 MB). Peak memory consumption was 29.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.looppreprocessor.LoopPreprocessorFastUPR.preProcessLoop(LoopPreprocessorFastUPR.java:119) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...