/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/MADWiFi-encode_ie_ok.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 21:57:52,725 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:57:52,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:57:52,767 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 21:57:52,785 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:57:52,790 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:57:52,792 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:57:52,794 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:57:52,796 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:57:52,797 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:57:52,806 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:57:52,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:57:52,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:57:52,819 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:57:52,820 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:57:52,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:57:52,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:57:52,845 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 21:57:52,858 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:57:52,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:57:52,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:57:52,860 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:57:52,860 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:57:52,860 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:57:52,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:57:52,861 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:57:52,861 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:57:52,861 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:57:52,861 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:57:52,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:57:52,861 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:57:52,862 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:57:52,862 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:57:52,862 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:57:52,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:57:52,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:57:52,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:57:52,863 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:57:52,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:57:52,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:57:52,863 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:57:53,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:57:53,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:57:53,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:57:53,306 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:57:53,308 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:57:53,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2020-10-23 21:57:53,413 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2edc3ac95/3d9d61a8a03545619ef63432df714aed/FLAG5f7121eae [2020-10-23 21:57:54,173 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:57:54,174 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/MADWiFi-encode_ie_ok.i [2020-10-23 21:57:54,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2edc3ac95/3d9d61a8a03545619ef63432df714aed/FLAG5f7121eae [2020-10-23 21:57:54,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2edc3ac95/3d9d61a8a03545619ef63432df714aed [2020-10-23 21:57:54,498 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:57:54,506 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:57:54,508 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:57:54,508 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:57:54,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:57:54,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:57:54" (1/1) ... [2020-10-23 21:57:54,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30a45acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:57:54, skipping insertion in model container [2020-10-23 21:57:54,521 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:57:54" (1/1) ... [2020-10-23 21:57:54,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:57:54,559 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:57:54,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:57:54,756 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:57:54,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:57:54,795 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:57:54,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:57:54 WrapperNode [2020-10-23 21:57:54,796 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:57:54,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:57:54,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:57:54,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:57:54,811 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:57:54" (1/1) ... [2020-10-23 21:57:54,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:57:54" (1/1) ... [2020-10-23 21:57:54,821 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:57:54" (1/1) ... [2020-10-23 21:57:54,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:57:54" (1/1) ... [2020-10-23 21:57:54,828 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:57:54" (1/1) ... [2020-10-23 21:57:54,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:57:54" (1/1) ... [2020-10-23 21:57:54,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:57:54" (1/1) ... [2020-10-23 21:57:54,839 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:57:54,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:57:54,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:57:54,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:57:54,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:57:54" (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 21:57:54,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:57:54,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:57:54,931 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:57:54,932 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 21:57:54,932 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:57:54,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:57:54,932 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:57:54,932 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:57:54,933 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 21:57:54,933 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 21:57:54,933 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:57:54,933 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:57:54,933 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 21:57:54,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:57:54,934 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 21:57:54,934 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:57:54,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:57:54,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:57:54,934 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:57:54,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:57:54,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:57:54,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:57:55,324 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:57:55,325 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 21:57:55,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:57:55 BoogieIcfgContainer [2020-10-23 21:57:55,327 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:57:55,329 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:57:55,329 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:57:55,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:57:55,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:57:54" (1/3) ... [2020-10-23 21:57:55,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43737222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:57:55, skipping insertion in model container [2020-10-23 21:57:55,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:57:54" (2/3) ... [2020-10-23 21:57:55,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43737222 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:57:55, skipping insertion in model container [2020-10-23 21:57:55,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:57:55" (3/3) ... [2020-10-23 21:57:55,338 INFO L111 eAbstractionObserver]: Analyzing ICFG MADWiFi-encode_ie_ok.i [2020-10-23 21:57:55,353 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:57:55,359 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:57:55,374 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:57:55,402 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:57:55,403 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:57:55,403 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:57:55,403 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:57:55,403 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:57:55,404 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:57:55,404 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:57:55,404 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:57:55,442 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states. [2020-10-23 21:57:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-23 21:57:55,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:57:55,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:57:55,464 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:57:55,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:57:55,482 INFO L82 PathProgramCache]: Analyzing trace with hash -808329830, now seen corresponding path program 1 times [2020-10-23 21:57:55,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:57:55,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034184600] [2020-10-23 21:57:55,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:57:55,598 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:57:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:56,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:57:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:56,050 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 21:57:56,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034184600] [2020-10-23 21:57:56,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:57:56,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-23 21:57:56,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388341078] [2020-10-23 21:57:56,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-23 21:57:56,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:57:56,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-23 21:57:56,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-23 21:57:56,084 INFO L87 Difference]: Start difference. First operand 65 states. Second operand 8 states. [2020-10-23 21:57:56,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:57:56,652 INFO L93 Difference]: Finished difference Result 92 states and 111 transitions. [2020-10-23 21:57:56,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 21:57:56,654 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 46 [2020-10-23 21:57:56,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:57:56,674 INFO L225 Difference]: With dead ends: 92 [2020-10-23 21:57:56,675 INFO L226 Difference]: Without dead ends: 58 [2020-10-23 21:57:56,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-23 21:57:56,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-23 21:57:56,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-10-23 21:57:56,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-23 21:57:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2020-10-23 21:57:56,751 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 46 [2020-10-23 21:57:56,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:57:56,752 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2020-10-23 21:57:56,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-23 21:57:56,752 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2020-10-23 21:57:56,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-23 21:57:56,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:57:56,755 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:57:56,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:57:56,755 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:57:56,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:57:56,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1847064117, now seen corresponding path program 1 times [2020-10-23 21:57:56,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:57:56,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076496017] [2020-10-23 21:57:56,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:57:56,768 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:57:56,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:56,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:57:56,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:56,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-23 21:57:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:57:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:57:56,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076496017] [2020-10-23 21:57:56,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:57:56,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-23 21:57:56,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109850183] [2020-10-23 21:57:56,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-23 21:57:56,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:57:56,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-23 21:57:56,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-23 21:57:56,963 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand 10 states. [2020-10-23 21:57:57,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:57:57,501 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-10-23 21:57:57,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-23 21:57:57,502 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-23 21:57:57,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:57:57,506 INFO L225 Difference]: With dead ends: 70 [2020-10-23 21:57:57,506 INFO L226 Difference]: Without dead ends: 66 [2020-10-23 21:57:57,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-10-23 21:57:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-23 21:57:57,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-23 21:57:57,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-23 21:57:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2020-10-23 21:57:57,534 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 51 [2020-10-23 21:57:57,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:57:57,534 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2020-10-23 21:57:57,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-23 21:57:57,535 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2020-10-23 21:57:57,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-23 21:57:57,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:57:57,538 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 21:57:57,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:57:57,539 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:57:57,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:57:57,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1467554325, now seen corresponding path program 1 times [2020-10-23 21:57:57,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:57:57,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876756695] [2020-10-23 21:57:57,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:57:57,544 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 21:57:57,550 INFO L168 Benchmark]: Toolchain (without parser) took 3048.74 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 132.3 MB in the beginning and 150.8 MB in the end (delta: -18.5 MB). Peak memory consumption was 13.4 MB. Max. memory is 8.0 GB. [2020-10-23 21:57:57,551 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 125.8 MB. Free memory is still 101.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:57:57,552 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.08 ms. Allocated memory is still 155.2 MB. Free memory was 131.7 MB in the beginning and 122.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 21:57:57,554 INFO L168 Benchmark]: Boogie Preprocessor took 41.78 ms. Allocated memory is still 155.2 MB. Free memory was 122.0 MB in the beginning and 120.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 21:57:57,555 INFO L168 Benchmark]: RCFGBuilder took 487.50 ms. Allocated memory is still 155.2 MB. Free memory was 120.3 MB in the beginning and 135.0 MB in the end (delta: -14.6 MB). Peak memory consumption was 18.3 MB. Max. memory is 8.0 GB. [2020-10-23 21:57:57,556 INFO L168 Benchmark]: TraceAbstraction took 2218.57 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 134.5 MB in the beginning and 150.8 MB in the end (delta: -16.3 MB). Peak memory consumption was 15.1 MB. Max. memory is 8.0 GB. [2020-10-23 21:57:57,560 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 125.8 MB. Free memory is still 101.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 288.08 ms. Allocated memory is still 155.2 MB. Free memory was 131.7 MB in the beginning and 122.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 41.78 ms. Allocated memory is still 155.2 MB. Free memory was 122.0 MB in the beginning and 120.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 487.50 ms. Allocated memory is still 155.2 MB. Free memory was 120.3 MB in the beginning and 135.0 MB in the end (delta: -14.6 MB). Peak memory consumption was 18.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2218.57 ms. Allocated memory was 155.2 MB in the beginning and 186.6 MB in the end (delta: 31.5 MB). Free memory was 134.5 MB in the beginning and 150.8 MB in the end (delta: -16.3 MB). Peak memory consumption was 15.1 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...