/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/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 22:00:34,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 22:00:34,953 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 22:00:35,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 22:00:35,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 22:00:35,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 22:00:35,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 22:00:35,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 22:00:35,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 22:00:35,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 22:00:35,059 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 22:00:35,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 22:00:35,070 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 22:00:35,072 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 22:00:35,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 22:00:35,076 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 22:00:35,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 22:00:35,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 22:00:35,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 22:00:35,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 22:00:35,100 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 22:00:35,123 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 22:00:35,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 22:00:35,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 22:00:35,128 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 22:00:35,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 22:00:35,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 22:00:35,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 22:00:35,129 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 22:00:35,129 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 22:00:35,129 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 22:00:35,130 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 22:00:35,130 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 22:00:35,131 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 22:00:35,131 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 22:00:35,131 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 22:00:35,131 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 22:00:35,132 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 22:00:35,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 22:00:35,132 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 22:00:35,132 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 22:00:35,132 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 22:00:35,132 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 22:00:35,133 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 22:00:35,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 22:00:35,642 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 22:00:35,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 22:00:35,648 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 22:00:35,648 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 22:00:35,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-10-23 22:00:35,729 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e273ee172/daa36d5db18b491896ac1bfc61e1e863/FLAGcc5c54989 [2020-10-23 22:00:36,426 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 22:00:36,427 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2020-10-23 22:00:36,436 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e273ee172/daa36d5db18b491896ac1bfc61e1e863/FLAGcc5c54989 [2020-10-23 22:00:36,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e273ee172/daa36d5db18b491896ac1bfc61e1e863 [2020-10-23 22:00:36,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 22:00:36,793 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 22:00:36,795 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 22:00:36,795 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 22:00:36,799 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 22:00:36,800 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:00:36" (1/1) ... [2020-10-23 22:00:36,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c22d18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:36, skipping insertion in model container [2020-10-23 22:00:36,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 10:00:36" (1/1) ... [2020-10-23 22:00:36,813 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 22:00:36,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 22:00:37,012 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:00:37,024 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 22:00:37,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 22:00:37,062 INFO L208 MainTranslator]: Completed translation [2020-10-23 22:00:37,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:37 WrapperNode [2020-10-23 22:00:37,063 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 22:00:37,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 22:00:37,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 22:00:37,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 22:00:37,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:37" (1/1) ... [2020-10-23 22:00:37,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:37" (1/1) ... [2020-10-23 22:00:37,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:37" (1/1) ... [2020-10-23 22:00:37,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:37" (1/1) ... [2020-10-23 22:00:37,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:37" (1/1) ... [2020-10-23 22:00:37,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:37" (1/1) ... [2020-10-23 22:00:37,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:37" (1/1) ... [2020-10-23 22:00:37,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 22:00:37,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 22:00:37,109 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 22:00:37,109 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 22:00:37,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:37" (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 22:00:37,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 22:00:37,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 22:00:37,201 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 22:00:37,201 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 22:00:37,201 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 22:00:37,201 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 22:00:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 22:00:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 22:00:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-23 22:00:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-23 22:00:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 22:00:37,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 22:00:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 22:00:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 22:00:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-23 22:00:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 22:00:37,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 22:00:37,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 22:00:37,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 22:00:37,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 22:00:37,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 22:00:37,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 22:00:37,545 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 22:00:37,545 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-23 22:00:37,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:00:37 BoogieIcfgContainer [2020-10-23 22:00:37,548 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 22:00:37,550 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 22:00:37,551 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 22:00:37,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 22:00:37,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 10:00:36" (1/3) ... [2020-10-23 22:00:37,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43075310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:00:37, skipping insertion in model container [2020-10-23 22:00:37,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 10:00:37" (2/3) ... [2020-10-23 22:00:37,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43075310 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 10:00:37, skipping insertion in model container [2020-10-23 22:00:37,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 10:00:37" (3/3) ... [2020-10-23 22:00:37,561 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-10-23 22:00:37,577 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 22:00:37,583 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 22:00:37,617 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 22:00:37,663 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 22:00:37,663 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 22:00:37,664 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 22:00:37,664 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 22:00:37,664 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 22:00:37,664 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 22:00:37,664 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 22:00:37,665 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 22:00:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-10-23 22:00:37,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-23 22:00:37,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:37,701 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] [2020-10-23 22:00:37,701 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:37,709 INFO L82 PathProgramCache]: Analyzing trace with hash 858751077, now seen corresponding path program 1 times [2020-10-23 22:00:37,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:37,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025432934] [2020-10-23 22:00:37,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:37,816 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:00:37,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:38,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:00:38,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:38,152 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 22:00:38,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025432934] [2020-10-23 22:00:38,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:00:38,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 22:00:38,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017664839] [2020-10-23 22:00:38,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 22:00:38,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:00:38,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 22:00:38,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 22:00:38,189 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 6 states. [2020-10-23 22:00:38,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:00:38,643 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2020-10-23 22:00:38,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 22:00:38,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-23 22:00:38,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:00:38,656 INFO L225 Difference]: With dead ends: 104 [2020-10-23 22:00:38,656 INFO L226 Difference]: Without dead ends: 57 [2020-10-23 22:00:38,661 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 22:00:38,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-23 22:00:38,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-23 22:00:38,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-23 22:00:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-23 22:00:38,729 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 36 [2020-10-23 22:00:38,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:00:38,730 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-23 22:00:38,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 22:00:38,730 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-23 22:00:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-23 22:00:38,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:38,733 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] [2020-10-23 22:00:38,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 22:00:38,734 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:38,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:38,735 INFO L82 PathProgramCache]: Analyzing trace with hash -2108867889, now seen corresponding path program 1 times [2020-10-23 22:00:38,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:38,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208480554] [2020-10-23 22:00:38,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:38,739 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:00:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:38,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:00:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:38,922 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 22:00:38,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208480554] [2020-10-23 22:00:38,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:00:38,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 22:00:38,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807090776] [2020-10-23 22:00:38,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 22:00:38,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:00:38,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 22:00:38,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:00:38,926 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2020-10-23 22:00:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:00:39,444 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-10-23 22:00:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 22:00:39,444 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-23 22:00:39,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:00:39,447 INFO L225 Difference]: With dead ends: 101 [2020-10-23 22:00:39,447 INFO L226 Difference]: Without dead ends: 97 [2020-10-23 22:00:39,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-23 22:00:39,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-23 22:00:39,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2020-10-23 22:00:39,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-23 22:00:39,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2020-10-23 22:00:39,473 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 38 [2020-10-23 22:00:39,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:00:39,474 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2020-10-23 22:00:39,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 22:00:39,474 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2020-10-23 22:00:39,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-23 22:00:39,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:39,476 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] [2020-10-23 22:00:39,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 22:00:39,476 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:39,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:39,477 INFO L82 PathProgramCache]: Analyzing trace with hash -819884979, now seen corresponding path program 1 times [2020-10-23 22:00:39,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:39,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309356186] [2020-10-23 22:00:39,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:39,481 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:00:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:39,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:00:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:39,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-23 22:00:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:39,618 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 22:00:39,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309356186] [2020-10-23 22:00:39,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:00:39,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-23 22:00:39,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281907088] [2020-10-23 22:00:39,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-23 22:00:39,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:00:39,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-23 22:00:39,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-23 22:00:39,622 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 6 states. [2020-10-23 22:00:40,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:00:40,016 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2020-10-23 22:00:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 22:00:40,017 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-23 22:00:40,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:00:40,020 INFO L225 Difference]: With dead ends: 97 [2020-10-23 22:00:40,020 INFO L226 Difference]: Without dead ends: 93 [2020-10-23 22:00:40,021 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 22:00:40,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-23 22:00:40,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-10-23 22:00:40,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-23 22:00:40,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-10-23 22:00:40,046 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 41 [2020-10-23 22:00:40,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:00:40,047 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-10-23 22:00:40,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-23 22:00:40,047 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-10-23 22:00:40,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 22:00:40,049 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:40,049 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 22:00:40,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 22:00:40,050 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:40,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:40,050 INFO L82 PathProgramCache]: Analyzing trace with hash 446664225, now seen corresponding path program 1 times [2020-10-23 22:00:40,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:40,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334496738] [2020-10-23 22:00:40,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:40,151 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:00:40,153 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:00:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:40,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:00:40,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:40,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-23 22:00:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:40,284 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 22:00:40,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334496738] [2020-10-23 22:00:40,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:00:40,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-23 22:00:40,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621611626] [2020-10-23 22:00:40,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-23 22:00:40,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:00:40,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-23 22:00:40,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-23 22:00:40,287 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 9 states. [2020-10-23 22:00:41,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:00:41,203 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2020-10-23 22:00:41,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-23 22:00:41,208 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-23 22:00:41,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:00:41,214 INFO L225 Difference]: With dead ends: 148 [2020-10-23 22:00:41,214 INFO L226 Difference]: Without dead ends: 144 [2020-10-23 22:00:41,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-23 22:00:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-23 22:00:41,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 92. [2020-10-23 22:00:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-23 22:00:41,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2020-10-23 22:00:41,273 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 47 [2020-10-23 22:00:41,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:00:41,276 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2020-10-23 22:00:41,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-23 22:00:41,276 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2020-10-23 22:00:41,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-23 22:00:41,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:41,291 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2020-10-23 22:00:41,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 22:00:41,291 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:41,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:41,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1244017404, now seen corresponding path program 1 times [2020-10-23 22:00:41,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:41,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379742616] [2020-10-23 22:00:41,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:41,377 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 22:00:41,379 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 22:00:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:41,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 22:00:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 22:00:41,506 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 22:00:41,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379742616] [2020-10-23 22:00:41,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 22:00:41,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-23 22:00:41,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037582495] [2020-10-23 22:00:41,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-23 22:00:41,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 22:00:41,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-23 22:00:41,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-23 22:00:41,511 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand 7 states. [2020-10-23 22:00:42,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 22:00:42,018 INFO L93 Difference]: Finished difference Result 205 states and 247 transitions. [2020-10-23 22:00:42,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-23 22:00:42,019 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-10-23 22:00:42,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 22:00:42,020 INFO L225 Difference]: With dead ends: 205 [2020-10-23 22:00:42,021 INFO L226 Difference]: Without dead ends: 137 [2020-10-23 22:00:42,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-23 22:00:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-23 22:00:42,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 97. [2020-10-23 22:00:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-23 22:00:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-10-23 22:00:42,065 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 47 [2020-10-23 22:00:42,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 22:00:42,066 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-10-23 22:00:42,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-23 22:00:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-10-23 22:00:42,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-23 22:00:42,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 22:00:42,078 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-23 22:00:42,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 22:00:42,079 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 22:00:42,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 22:00:42,080 INFO L82 PathProgramCache]: Analyzing trace with hash -668258906, now seen corresponding path program 1 times [2020-10-23 22:00:42,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 22:00:42,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035807791] [2020-10-23 22:00:42,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 22:00:42,084 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 22:00:42,096 INFO L168 Benchmark]: Toolchain (without parser) took 5304.73 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.5 MB in the beginning and 68.0 MB in the end (delta: 59.4 MB). Peak memory consumption was 91.3 MB. Max. memory is 8.0 GB. [2020-10-23 22:00:42,098 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 101.4 MB in the end (delta: 68.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 22:00:42,102 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.49 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 117.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-23 22:00:42,107 INFO L168 Benchmark]: Boogie Preprocessor took 42.71 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 115.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-23 22:00:42,110 INFO L168 Benchmark]: RCFGBuilder took 439.25 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 130.0 MB in the end (delta: -14.4 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. [2020-10-23 22:00:42,110 INFO L168 Benchmark]: TraceAbstraction took 4540.04 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 129.6 MB in the beginning and 68.0 MB in the end (delta: 61.6 MB). Peak memory consumption was 91.9 MB. Max. memory is 8.0 GB. [2020-10-23 22:00:42,120 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 125.8 MB. Free memory was 101.5 MB in the beginning and 101.4 MB in the end (delta: 68.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 268.49 ms. Allocated memory is still 151.0 MB. Free memory was 126.7 MB in the beginning and 117.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.71 ms. Allocated memory is still 151.0 MB. Free memory was 117.2 MB in the beginning and 115.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 439.25 ms. Allocated memory is still 151.0 MB. Free memory was 115.6 MB in the beginning and 130.0 MB in the end (delta: -14.4 MB). Peak memory consumption was 16.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4540.04 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 129.6 MB in the beginning and 68.0 MB in the end (delta: 61.6 MB). Peak memory consumption was 91.9 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...