/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-lit/cggmp2005.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:29:18,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:29:18,894 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:29:18,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:29:18,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:29:18,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:29:18,960 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:29:18,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:29:18,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:29:19,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:29:19,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:29:19,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:29:19,010 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:29:19,013 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:29:19,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:29:19,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:29:19,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:29:19,043 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:29:19,058 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:29:19,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:29:19,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:29:19,061 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:29:19,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:29:19,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:29:19,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:29:19,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:29:19,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:29:19,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:29:19,063 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:29:19,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:29:19,064 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:29:19,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:29:19,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:29:19,065 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:29:19,065 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:29:19,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:29:19,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:29:19,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:29:19,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:29:19,067 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:29:19,067 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:29:19,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:29:19,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:29:19,579 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:29:19,581 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:29:19,582 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:29:19,583 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005.i [2020-10-24 02:29:19,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e781267cb/bde8ae92453f440aa92528cd5fbfd01c/FLAGb1127269b [2020-10-24 02:29:20,422 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:29:20,423 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005.i [2020-10-24 02:29:20,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e781267cb/bde8ae92453f440aa92528cd5fbfd01c/FLAGb1127269b [2020-10-24 02:29:20,810 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e781267cb/bde8ae92453f440aa92528cd5fbfd01c [2020-10-24 02:29:20,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:29:20,826 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:29:20,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:29:20,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:29:20,841 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:29:20,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:29:20" (1/1) ... [2020-10-24 02:29:20,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@442e1a9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:20, skipping insertion in model container [2020-10-24 02:29:20,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:29:20" (1/1) ... [2020-10-24 02:29:20,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:29:20,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:29:21,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:29:21,178 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:29:21,198 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:29:21,218 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:29:21,219 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:21 WrapperNode [2020-10-24 02:29:21,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:29:21,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:29:21,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:29:21,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:29:21,235 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:21" (1/1) ... [2020-10-24 02:29:21,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:21" (1/1) ... [2020-10-24 02:29:21,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:21" (1/1) ... [2020-10-24 02:29:21,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:21" (1/1) ... [2020-10-24 02:29:21,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:21" (1/1) ... [2020-10-24 02:29:21,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:21" (1/1) ... [2020-10-24 02:29:21,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:21" (1/1) ... [2020-10-24 02:29:21,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:29:21,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:29:21,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:29:21,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:29:21,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:29:21,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:29:21,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:29:21,381 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:29:21,381 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:29:21,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:29:21,382 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:29:21,382 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:29:21,383 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:29:21,383 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 02:29:21,383 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 02:29:21,383 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:29:21,383 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:29:21,383 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:29:21,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:29:21,384 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:29:21,384 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:29:21,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:29:21,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:29:21,385 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:29:21,386 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:29:21,387 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:29:21,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:29:21,930 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:29:21,931 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:29:21,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:29:21 BoogieIcfgContainer [2020-10-24 02:29:21,937 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:29:21,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:29:21,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:29:21,949 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:29:21,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:29:20" (1/3) ... [2020-10-24 02:29:21,952 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48596b38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:29:21, skipping insertion in model container [2020-10-24 02:29:21,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:21" (2/3) ... [2020-10-24 02:29:21,953 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48596b38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:29:21, skipping insertion in model container [2020-10-24 02:29:21,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:29:21" (3/3) ... [2020-10-24 02:29:21,955 INFO L111 eAbstractionObserver]: Analyzing ICFG cggmp2005.i [2020-10-24 02:29:21,972 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:29:21,979 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:29:22,000 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:29:22,049 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:29:22,050 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:29:22,050 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:29:22,050 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:29:22,050 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:29:22,050 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:29:22,050 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:29:22,051 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:29:22,079 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states. [2020-10-24 02:29:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-24 02:29:22,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:22,096 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] [2020-10-24 02:29:22,097 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:22,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:22,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1288659105, now seen corresponding path program 1 times [2020-10-24 02:29:22,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:22,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111873601] [2020-10-24 02:29:22,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:22,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:22,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:22,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111873601] [2020-10-24 02:29:22,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:29:22,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:29:22,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018311689] [2020-10-24 02:29:22,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:29:22,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:22,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:29:22,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:29:22,545 INFO L87 Difference]: Start difference. First operand 36 states. Second operand 3 states. [2020-10-24 02:29:22,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:22,652 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2020-10-24 02:29:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:29:22,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-10-24 02:29:22,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:22,670 INFO L225 Difference]: With dead ends: 50 [2020-10-24 02:29:22,670 INFO L226 Difference]: Without dead ends: 25 [2020-10-24 02:29:22,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:29:22,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-24 02:29:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-24 02:29:22,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-24 02:29:22,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-24 02:29:22,741 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-24 02:29:22,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:22,742 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-24 02:29:22,742 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:29:22,742 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-24 02:29:22,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-24 02:29:22,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:22,744 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] [2020-10-24 02:29:22,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:29:22,744 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:22,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:22,745 INFO L82 PathProgramCache]: Analyzing trace with hash 258604315, now seen corresponding path program 1 times [2020-10-24 02:29:22,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:22,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970091555] [2020-10-24 02:29:22,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:22,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:22,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:22,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:22,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970091555] [2020-10-24 02:29:22,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:29:22,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:29:22,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615409592] [2020-10-24 02:29:22,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:29:22,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:22,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:29:22,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:29:22,937 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 5 states. [2020-10-24 02:29:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:23,094 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-24 02:29:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:29:23,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-24 02:29:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:23,096 INFO L225 Difference]: With dead ends: 34 [2020-10-24 02:29:23,097 INFO L226 Difference]: Without dead ends: 27 [2020-10-24 02:29:23,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:29:23,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-24 02:29:23,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-10-24 02:29:23,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-24 02:29:23,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2020-10-24 02:29:23,112 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 22 [2020-10-24 02:29:23,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:23,113 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2020-10-24 02:29:23,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:29:23,113 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2020-10-24 02:29:23,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-24 02:29:23,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:23,115 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] [2020-10-24 02:29:23,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:29:23,116 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:23,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:23,117 INFO L82 PathProgramCache]: Analyzing trace with hash -944596217, now seen corresponding path program 1 times [2020-10-24 02:29:23,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:23,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102195078] [2020-10-24 02:29:23,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:23,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:23,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:23,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:23,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102195078] [2020-10-24 02:29:23,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:23,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-24 02:29:23,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305548868] [2020-10-24 02:29:23,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:29:23,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:23,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:29:23,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:29:23,274 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 7 states. [2020-10-24 02:29:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:23,495 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-10-24 02:29:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:29:23,496 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-24 02:29:23,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:23,498 INFO L225 Difference]: With dead ends: 37 [2020-10-24 02:29:23,498 INFO L226 Difference]: Without dead ends: 30 [2020-10-24 02:29:23,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:29:23,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-24 02:29:23,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-24 02:29:23,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-24 02:29:23,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-24 02:29:23,510 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 25 [2020-10-24 02:29:23,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:23,510 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-24 02:29:23,511 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:29:23,511 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-24 02:29:23,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-24 02:29:23,512 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:23,512 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] [2020-10-24 02:29:23,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:29:23,513 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:23,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:23,514 INFO L82 PathProgramCache]: Analyzing trace with hash 305407387, now seen corresponding path program 2 times [2020-10-24 02:29:23,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:23,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665474258] [2020-10-24 02:29:23,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:23,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:23,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:23,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665474258] [2020-10-24 02:29:23,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:23,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-24 02:29:23,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794483765] [2020-10-24 02:29:23,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 02:29:23,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:23,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 02:29:23,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:29:23,651 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 9 states. [2020-10-24 02:29:23,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:23,943 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-24 02:29:23,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 02:29:23,944 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-10-24 02:29:23,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:23,951 INFO L225 Difference]: With dead ends: 40 [2020-10-24 02:29:23,951 INFO L226 Difference]: Without dead ends: 33 [2020-10-24 02:29:23,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:29:23,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-24 02:29:23,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-10-24 02:29:23,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-24 02:29:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-10-24 02:29:23,963 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 28 [2020-10-24 02:29:23,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:23,964 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-10-24 02:29:23,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 02:29:23,964 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-10-24 02:29:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-24 02:29:23,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:23,965 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:23,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:29:23,966 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:23,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:23,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1796317831, now seen corresponding path program 3 times [2020-10-24 02:29:23,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:23,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169182351] [2020-10-24 02:29:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:24,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:24,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169182351] [2020-10-24 02:29:24,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:24,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-24 02:29:24,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49053840] [2020-10-24 02:29:24,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 02:29:24,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:24,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 02:29:24,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:29:24,120 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2020-10-24 02:29:24,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:24,515 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-24 02:29:24,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 02:29:24,515 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-10-24 02:29:24,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:24,517 INFO L225 Difference]: With dead ends: 42 [2020-10-24 02:29:24,517 INFO L226 Difference]: Without dead ends: 35 [2020-10-24 02:29:24,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2020-10-24 02:29:24,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-24 02:29:24,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-24 02:29:24,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-24 02:29:24,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-24 02:29:24,529 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 31 [2020-10-24 02:29:24,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:24,530 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-24 02:29:24,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 02:29:24,530 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-24 02:29:24,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-24 02:29:24,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:24,532 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:24,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:29:24,532 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:24,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:24,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1042420197, now seen corresponding path program 4 times [2020-10-24 02:29:24,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:24,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222317690] [2020-10-24 02:29:24,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:24,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:24,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:24,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222317690] [2020-10-24 02:29:24,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:24,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-24 02:29:24,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369993800] [2020-10-24 02:29:24,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-24 02:29:24,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:24,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-24 02:29:24,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-24 02:29:24,930 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 15 states. [2020-10-24 02:29:25,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:25,639 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2020-10-24 02:29:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-24 02:29:25,640 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-10-24 02:29:25,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:25,641 INFO L225 Difference]: With dead ends: 41 [2020-10-24 02:29:25,641 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 02:29:25,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=553, Unknown=0, NotChecked=0, Total=702 [2020-10-24 02:29:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 02:29:25,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 02:29:25,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 02:29:25,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 02:29:25,644 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-10-24 02:29:25,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:25,644 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 02:29:25,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-24 02:29:25,644 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 02:29:25,644 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 02:29:25,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:29:25,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 02:29:26,048 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2020-10-24 02:29:26,303 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2020-10-24 02:29:26,449 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2020-10-24 02:29:26,462 INFO L277 CegarLoopResult]: At program point reach_errorEXIT(line 12) the Hoare annotation is: true [2020-10-24 02:29:26,462 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-24 02:29:26,462 INFO L277 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-10-24 02:29:26,462 INFO L277 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-10-24 02:29:26,462 INFO L277 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-10-24 02:29:26,463 INFO L277 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: true [2020-10-24 02:29:26,463 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 02:29:26,463 INFO L277 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-10-24 02:29:26,463 INFO L277 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2020-10-24 02:29:26,463 INFO L277 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-10-24 02:29:26,464 INFO L277 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-10-24 02:29:26,464 INFO L277 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-10-24 02:29:26,464 INFO L270 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2020-10-24 02:29:26,464 INFO L277 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-10-24 02:29:26,464 INFO L277 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-10-24 02:29:26,465 INFO L277 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-10-24 02:29:26,465 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 02:29:26,465 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-24 02:29:26,465 INFO L277 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-10-24 02:29:26,465 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-24 02:29:26,465 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-24 02:29:26,466 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-24 02:29:26,466 INFO L274 CegarLoopResult]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2020-10-24 02:29:26,466 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-24 02:29:26,466 INFO L277 CegarLoopResult]: At program point L32(line 32) the Hoare annotation is: true [2020-10-24 02:29:26,467 INFO L270 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (let ((.cse0 (<= 7 main_~i~0))) (or (and (<= main_~j~0 8) .cse0 (<= (+ main_~i~0 1) main_~j~0)) (and (<= main_~j~0 7) (<= 7 main_~j~0) .cse0) (and (<= (+ main_~i~0 7) main_~j~0) (<= main_~j~0 10) (<= 3 main_~i~0)) (and (<= 5 main_~i~0) (<= (+ main_~i~0 4) main_~j~0) (<= main_~j~0 9)))) [2020-10-24 02:29:26,467 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 24 34) the Hoare annotation is: true [2020-10-24 02:29:26,467 INFO L270 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (or (and (<= main_~j~0 8) (<= 5 main_~i~0) (<= (+ main_~i~0 3) main_~j~0)) (and (<= (+ main_~i~0 6) main_~j~0) (<= 3 main_~i~0) (<= main_~j~0 9)) (and (<= main_~j~0 7) (<= 7 main_~i~0) (<= main_~i~0 main_~j~0)) (and (<= 10 main_~j~0) (= main_~i~0 1) (<= main_~j~0 10))) [2020-10-24 02:29:26,467 INFO L270 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (= main_~i~0 1) [2020-10-24 02:29:26,467 INFO L277 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-10-24 02:29:26,468 INFO L270 CegarLoopResult]: At program point L28-2(lines 28 31) the Hoare annotation is: (let ((.cse0 (<= 7 main_~i~0))) (or (and (<= main_~j~0 8) (<= 5 main_~i~0) (<= (+ main_~i~0 3) main_~j~0)) (and (<= (+ main_~i~0 6) main_~j~0) (<= 3 main_~i~0) (<= main_~j~0 9)) (and (<= main_~j~0 7) .cse0 (<= main_~i~0 main_~j~0)) (and (<= 10 main_~j~0) (= main_~i~0 1) (<= main_~j~0 10)) (and .cse0 (<= main_~j~0 6) (<= 6 main_~j~0)))) [2020-10-24 02:29:26,468 INFO L277 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: true [2020-10-24 02:29:26,468 INFO L270 CegarLoopResult]: At program point L28-3(lines 28 31) the Hoare annotation is: (and (<= 7 main_~i~0) (<= main_~j~0 6) (<= 6 main_~j~0)) [2020-10-24 02:29:26,468 INFO L277 CegarLoopResult]: At program point mainEXIT(lines 24 34) the Hoare annotation is: true [2020-10-24 02:29:26,469 INFO L277 CegarLoopResult]: At program point mainFINAL(lines 24 34) the Hoare annotation is: true [2020-10-24 02:29:26,469 INFO L277 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2020-10-24 02:29:26,469 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-24 02:29:26,469 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: true [2020-10-24 02:29:26,469 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-24 02:29:26,470 INFO L270 CegarLoopResult]: At program point L18(lines 18 20) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-24 02:29:26,470 INFO L270 CegarLoopResult]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-24 02:29:26,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:29:26 BoogieIcfgContainer [2020-10-24 02:29:26,496 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:29:26,498 INFO L168 Benchmark]: Toolchain (without parser) took 5678.68 ms. Allocated memory was 151.0 MB in the beginning and 192.9 MB in the end (delta: 41.9 MB). Free memory was 127.8 MB in the beginning and 94.9 MB in the end (delta: 32.9 MB). Peak memory consumption was 104.2 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:26,499 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:29:26,500 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.85 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 118.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:26,502 INFO L168 Benchmark]: Boogie Preprocessor took 42.53 ms. Allocated memory is still 151.0 MB. Free memory was 118.1 MB in the beginning and 116.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:26,503 INFO L168 Benchmark]: RCFGBuilder took 673.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 133.9 MB in the end (delta: -17.4 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:26,504 INFO L168 Benchmark]: TraceAbstraction took 4552.56 ms. Allocated memory was 151.0 MB in the beginning and 192.9 MB in the end (delta: 41.9 MB). Free memory was 133.4 MB in the beginning and 94.9 MB in the end (delta: 38.4 MB). Peak memory consumption was 108.2 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:26,508 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 151.0 MB. Free memory is still 124.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 384.85 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 118.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.53 ms. Allocated memory is still 151.0 MB. Free memory was 118.1 MB in the beginning and 116.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 673.07 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 133.9 MB in the end (delta: -17.4 MB). Peak memory consumption was 15.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4552.56 ms. Allocated memory was 151.0 MB in the beginning and 192.9 MB in the end (delta: 41.9 MB). Free memory was 133.4 MB in the beginning and 94.9 MB in the end (delta: 38.4 MB). Peak memory consumption was 108.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((((j <= 8 && 5 <= i) && i + 3 <= j) || ((i + 6 <= j && 3 <= i) && j <= 9)) || ((j <= 7 && 7 <= i) && i <= j)) || ((10 <= j && i == 1) && j <= 10)) || ((7 <= i && j <= 6) && 6 <= j) - ProcedureContractResult [Line: 12]: Procedure Contract for reach_error Derived contract for procedure reach_error: 1 - ProcedureContractResult [Line: 24]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 17]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.6s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 136 SDtfs, 112 SDslu, 298 SDs, 0 SdLazy, 332 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 3 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 36 LocationsWithAnnotation, 102 PreInvPairs, 133 NumberOfFragments, 226 HoareAnnotationTreeSize, 102 FomulaSimplifications, 1019 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 36 FomulaSimplificationsInter, 637 FormulaSimplificationTreeSizeReductionInter, 0.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 162 NumberOfCodeBlocks, 162 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 156 ConstructedInterpolants, 0 QuantifiedInterpolants, 13890 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 7/40 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...