/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/ddlm2013.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:29:29,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:29:29,586 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:29:29,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:29:29,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:29:29,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:29:29,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:29:29,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:29:29,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:29:29,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:29:29,690 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:29:29,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:29:29,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:29:29,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:29:29,702 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:29:29,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:29:29,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:29:29,721 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:29:29,722 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:29:29,723 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:29:29,724 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 02:29:29,745 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:29:29,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:29:29,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:29:29,751 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:29:29,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:29:29,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:29:29,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:29:29,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:29:29,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:29:29,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:29:29,753 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:29:29,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:29:29,753 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:29:29,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:29:29,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:29:29,754 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:29:29,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:29:29,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:29:29,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:29:29,755 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:29:29,755 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:29:29,755 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:29:29,756 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:29:30,179 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:29:30,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:29:30,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:29:30,211 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:29:30,216 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:29:30,217 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-10-24 02:29:30,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a974178d/03b33967280746fe80c86b0ce6f582ca/FLAG76894e316 [2020-10-24 02:29:31,033 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:29:31,034 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/ddlm2013.i [2020-10-24 02:29:31,041 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a974178d/03b33967280746fe80c86b0ce6f582ca/FLAG76894e316 [2020-10-24 02:29:31,393 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a974178d/03b33967280746fe80c86b0ce6f582ca [2020-10-24 02:29:31,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:29:31,409 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:29:31,412 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:29:31,413 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:29:31,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:29:31,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:29:31" (1/1) ... [2020-10-24 02:29:31,423 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c828bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:31, skipping insertion in model container [2020-10-24 02:29:31,423 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:29:31" (1/1) ... [2020-10-24 02:29:31,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:29:31,451 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:29:31,615 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:29:31,627 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:29:31,660 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:29:31,689 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:29:31,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:31 WrapperNode [2020-10-24 02:29:31,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:29:31,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:29:31,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:29:31,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:29:31,708 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:31" (1/1) ... [2020-10-24 02:29:31,708 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:31" (1/1) ... [2020-10-24 02:29:31,718 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:31" (1/1) ... [2020-10-24 02:29:31,718 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:31" (1/1) ... [2020-10-24 02:29:31,738 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:31" (1/1) ... [2020-10-24 02:29:31,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:31" (1/1) ... [2020-10-24 02:29:31,752 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:31" (1/1) ... [2020-10-24 02:29:31,755 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:29:31,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:29:31,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:29:31,757 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:29:31,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:31" (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 02:29:31,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:29:31,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:29:31,835 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:29:31,835 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:29:31,835 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:29:31,836 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:29:31,836 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:29:31,836 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:29:31,836 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 02:29:31,836 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 02:29:31,836 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:29:31,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:29:31,837 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:29:31,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:29:31,837 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:29:31,837 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:29:31,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:29:31,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:29:31,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:29:31,838 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:29:31,838 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:29:31,838 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:29:32,095 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:29:32,096 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:29:32,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:29:32 BoogieIcfgContainer [2020-10-24 02:29:32,099 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:29:32,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:29:32,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:29:32,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:29:32,135 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:29:31" (1/3) ... [2020-10-24 02:29:32,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ddb841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:29:32, skipping insertion in model container [2020-10-24 02:29:32,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:29:31" (2/3) ... [2020-10-24 02:29:32,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41ddb841 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:29:32, skipping insertion in model container [2020-10-24 02:29:32,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:29:32" (3/3) ... [2020-10-24 02:29:32,138 INFO L111 eAbstractionObserver]: Analyzing ICFG ddlm2013.i [2020-10-24 02:29:32,151 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:29:32,156 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:29:32,171 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:29:32,197 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:29:32,197 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:29:32,198 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:29:32,198 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:29:32,198 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:29:32,198 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:29:32,198 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:29:32,198 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:29:32,215 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2020-10-24 02:29:32,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-24 02:29:32,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:32,227 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] [2020-10-24 02:29:32,228 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:32,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:32,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1451726539, now seen corresponding path program 1 times [2020-10-24 02:29:32,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:32,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784059130] [2020-10-24 02:29:32,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:32,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:32,619 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:32,657 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 02:29:32,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784059130] [2020-10-24 02:29:32,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:29:32,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:29:32,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434544847] [2020-10-24 02:29:32,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:29:32,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:32,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:29:32,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:29:32,700 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 3 states. [2020-10-24 02:29:32,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:32,848 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-10-24 02:29:32,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:29:32,852 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-24 02:29:32,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:32,876 INFO L225 Difference]: With dead ends: 72 [2020-10-24 02:29:32,877 INFO L226 Difference]: Without dead ends: 46 [2020-10-24 02:29:32,885 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 02:29:32,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-24 02:29:32,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-10-24 02:29:32,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-24 02:29:32,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-24 02:29:32,974 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 31 [2020-10-24 02:29:32,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:32,975 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-24 02:29:32,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:29:32,975 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-24 02:29:32,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-24 02:29:32,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:32,979 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] [2020-10-24 02:29:32,980 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:29:32,980 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:32,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:32,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1635626356, now seen corresponding path program 1 times [2020-10-24 02:29:32,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:32,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853905499] [2020-10-24 02:29:32,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:33,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:33,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:33,153 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 02:29:33,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853905499] [2020-10-24 02:29:33,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:29:33,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 02:29:33,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157368991] [2020-10-24 02:29:33,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 02:29:33,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:33,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 02:29:33,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 02:29:33,159 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 4 states. [2020-10-24 02:29:33,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:33,331 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2020-10-24 02:29:33,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 02:29:33,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-24 02:29:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:33,334 INFO L225 Difference]: With dead ends: 68 [2020-10-24 02:29:33,334 INFO L226 Difference]: Without dead ends: 45 [2020-10-24 02:29:33,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:29:33,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-24 02:29:33,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-24 02:29:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-24 02:29:33,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-10-24 02:29:33,352 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 33 [2020-10-24 02:29:33,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:33,352 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-10-24 02:29:33,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 02:29:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-10-24 02:29:33,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-24 02:29:33,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:33,354 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] [2020-10-24 02:29:33,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:29:33,355 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:33,356 INFO L82 PathProgramCache]: Analyzing trace with hash -926987732, now seen corresponding path program 1 times [2020-10-24 02:29:33,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:33,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189215614] [2020-10-24 02:29:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:33,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:33,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:33,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:33,529 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 02:29:33,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189215614] [2020-10-24 02:29:33,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:29:33,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-24 02:29:33,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534277152] [2020-10-24 02:29:33,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:29:33,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:33,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:29:33,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:29:33,532 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 7 states. [2020-10-24 02:29:33,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:33,794 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-10-24 02:29:33,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:29:33,794 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 33 [2020-10-24 02:29:33,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:33,796 INFO L225 Difference]: With dead ends: 59 [2020-10-24 02:29:33,796 INFO L226 Difference]: Without dead ends: 50 [2020-10-24 02:29:33,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:29:33,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-24 02:29:33,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-24 02:29:33,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-24 02:29:33,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-10-24 02:29:33,810 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 33 [2020-10-24 02:29:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:33,810 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-10-24 02:29:33,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:29:33,811 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-10-24 02:29:33,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-24 02:29:33,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:33,812 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:33,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:29:33,813 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:33,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash 543258678, now seen corresponding path program 1 times [2020-10-24 02:29:33,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:33,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388003299] [2020-10-24 02:29:33,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:34,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:34,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388003299] [2020-10-24 02:29:34,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:34,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-24 02:29:34,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590122013] [2020-10-24 02:29:34,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 02:29:34,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:34,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 02:29:34,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-24 02:29:34,123 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 12 states. [2020-10-24 02:29:34,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:34,666 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2020-10-24 02:29:34,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:29:34,666 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-24 02:29:34,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:34,668 INFO L225 Difference]: With dead ends: 72 [2020-10-24 02:29:34,668 INFO L226 Difference]: Without dead ends: 63 [2020-10-24 02:29:34,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2020-10-24 02:29:34,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-24 02:29:34,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2020-10-24 02:29:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-24 02:29:34,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2020-10-24 02:29:34,684 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 43 [2020-10-24 02:29:34,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:34,684 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2020-10-24 02:29:34,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 02:29:34,685 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2020-10-24 02:29:34,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-24 02:29:34,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:34,686 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:34,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:29:34,687 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:34,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:34,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1097784896, now seen corresponding path program 2 times [2020-10-24 02:29:34,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:34,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433622160] [2020-10-24 02:29:34,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:35,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:35,207 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:35,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433622160] [2020-10-24 02:29:35,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:35,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-24 02:29:35,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833718904] [2020-10-24 02:29:35,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-24 02:29:35,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:35,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-24 02:29:35,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:29:35,210 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand 17 states. [2020-10-24 02:29:36,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:36,321 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2020-10-24 02:29:36,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 02:29:36,323 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 53 [2020-10-24 02:29:36,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:36,325 INFO L225 Difference]: With dead ends: 105 [2020-10-24 02:29:36,325 INFO L226 Difference]: Without dead ends: 73 [2020-10-24 02:29:36,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=172, Invalid=884, Unknown=0, NotChecked=0, Total=1056 [2020-10-24 02:29:36,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-24 02:29:36,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 70. [2020-10-24 02:29:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-24 02:29:36,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2020-10-24 02:29:36,366 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 53 [2020-10-24 02:29:36,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:36,367 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2020-10-24 02:29:36,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-24 02:29:36,367 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2020-10-24 02:29:36,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-24 02:29:36,368 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:36,369 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:36,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:29:36,369 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:36,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:36,370 INFO L82 PathProgramCache]: Analyzing trace with hash -347478326, now seen corresponding path program 3 times [2020-10-24 02:29:36,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:36,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [423292396] [2020-10-24 02:29:36,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:36,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:36,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:36,950 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:36,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [423292396] [2020-10-24 02:29:36,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:36,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-24 02:29:36,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988766089] [2020-10-24 02:29:36,952 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-24 02:29:36,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:36,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-24 02:29:36,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2020-10-24 02:29:36,954 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand 21 states. [2020-10-24 02:29:38,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:38,642 INFO L93 Difference]: Finished difference Result 97 states and 100 transitions. [2020-10-24 02:29:38,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-24 02:29:38,643 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 63 [2020-10-24 02:29:38,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:38,644 INFO L225 Difference]: With dead ends: 97 [2020-10-24 02:29:38,644 INFO L226 Difference]: Without dead ends: 88 [2020-10-24 02:29:38,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=242, Invalid=1480, Unknown=0, NotChecked=0, Total=1722 [2020-10-24 02:29:38,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-24 02:29:38,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2020-10-24 02:29:38,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-24 02:29:38,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2020-10-24 02:29:38,693 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 63 [2020-10-24 02:29:38,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:38,694 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2020-10-24 02:29:38,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-24 02:29:38,695 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2020-10-24 02:29:38,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-24 02:29:38,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:38,699 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-24 02:29:38,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:29:38,701 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:38,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:38,702 INFO L82 PathProgramCache]: Analyzing trace with hash 152623083, now seen corresponding path program 1 times [2020-10-24 02:29:38,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:38,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981817608] [2020-10-24 02:29:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:38,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:38,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:38,837 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 23 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-24 02:29:38,837 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981817608] [2020-10-24 02:29:38,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:38,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-24 02:29:38,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779070338] [2020-10-24 02:29:38,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:29:38,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:38,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:29:38,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:29:38,840 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 6 states. [2020-10-24 02:29:39,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:39,057 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2020-10-24 02:29:39,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 02:29:39,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-10-24 02:29:39,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:39,059 INFO L225 Difference]: With dead ends: 101 [2020-10-24 02:29:39,059 INFO L226 Difference]: Without dead ends: 74 [2020-10-24 02:29:39,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:29:39,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-24 02:29:39,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-10-24 02:29:39,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-24 02:29:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2020-10-24 02:29:39,080 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 65 [2020-10-24 02:29:39,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:39,081 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2020-10-24 02:29:39,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:29:39,081 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2020-10-24 02:29:39,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-24 02:29:39,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:39,082 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:39,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:29:39,083 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:39,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:39,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1618962260, now seen corresponding path program 4 times [2020-10-24 02:29:39,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:39,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030198180] [2020-10-24 02:29:39,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:39,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:29:39,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030198180] [2020-10-24 02:29:39,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:39,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-24 02:29:39,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489443761] [2020-10-24 02:29:39,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-24 02:29:39,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:39,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-24 02:29:39,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:29:39,742 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand 25 states. [2020-10-24 02:29:42,574 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2020-10-24 02:29:43,249 WARN L193 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 49 [2020-10-24 02:29:43,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:43,726 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-24 02:29:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-24 02:29:43,726 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-10-24 02:29:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:43,727 INFO L225 Difference]: With dead ends: 74 [2020-10-24 02:29:43,727 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 02:29:43,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2020-10-24 02:29:43,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 02:29:43,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 02:29:43,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 02:29:43,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 02:29:43,731 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2020-10-24 02:29:43,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:43,732 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 02:29:43,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-24 02:29:43,732 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 02:29:43,732 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 02:29:43,733 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:29:43,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 02:29:44,299 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 44 [2020-10-24 02:29:44,507 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 43 [2020-10-24 02:29:44,684 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2020-10-24 02:29:44,831 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2020-10-24 02:29:45,043 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2020-10-24 02:29:47,480 WARN L193 SmtUtils]: Spent 2.39 s on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2020-10-24 02:29:47,787 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2020-10-24 02:29:48,023 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2020-10-24 02:29:48,261 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 35 [2020-10-24 02:29:52,743 WARN L193 SmtUtils]: Spent 4.44 s on a formula simplification. DAG size of input: 73 DAG size of output: 38 [2020-10-24 02:29:52,754 INFO L277 CegarLoopResult]: At program point reach_errorEXIT(line 12) the Hoare annotation is: true [2020-10-24 02:29:52,754 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-24 02:29:52,754 INFO L277 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-10-24 02:29:52,754 INFO L277 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-10-24 02:29:52,755 INFO L277 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-10-24 02:29:52,755 INFO L277 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: true [2020-10-24 02:29:52,755 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 02:29:52,755 INFO L277 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-10-24 02:29:52,755 INFO L277 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2020-10-24 02:29:52,756 INFO L277 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-10-24 02:29:52,756 INFO L277 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-10-24 02:29:52,756 INFO L277 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-10-24 02:29:52,756 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 02:29:52,756 INFO L277 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-10-24 02:29:52,756 INFO L277 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-10-24 02:29:52,757 INFO L277 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-10-24 02:29:52,757 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 02:29:52,757 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-24 02:29:52,757 INFO L277 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-10-24 02:29:52,757 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-24 02:29:52,757 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-24 02:29:52,757 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-24 02:29:52,758 INFO L274 CegarLoopResult]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2020-10-24 02:29:52,758 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-24 02:29:52,758 INFO L270 CegarLoopResult]: At program point L35-3(line 35) the Hoare annotation is: (let ((.cse5 (+ (* 3 main_~i~0) main_~a~0 3)) (.cse4 (+ (* 3 main_~j~0) main_~b~0)) (.cse7 (+ main_~j~0 main_~b~0)) (.cse6 (+ main_~i~0 main_~a~0 1))) (let ((.cse0 (<= .cse7 .cse6)) (.cse1 (<= .cse5 .cse4)) (.cse2 (<= .cse6 .cse7)) (.cse3 (<= .cse4 .cse5))) (or (and (= main_~i~0 0) (= main_~b~0 0) (= main_~a~0 0) (= main_~j~0 1)) (= main_~flag~0 0) (and .cse0 (<= 4 main_~i~0) .cse1 .cse2 .cse3 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 (<= main_~i~0 2) .cse3)))) [2020-10-24 02:29:52,758 INFO L270 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (and (= main_~a~0 0) (= main_~b~0 0) (= main_~j~0 1)) [2020-10-24 02:29:52,758 INFO L270 CegarLoopResult]: At program point L35-4(lines 24 49) the Hoare annotation is: (or (= main_~flag~0 0) (let ((.cse1 (* 4294967296 (div main_~b~0 4294967296))) (.cse0 (+ (* 4294967296 (div main_~a~0 4294967296)) main_~b~0))) (and (< .cse0 (+ .cse1 main_~a~0 1)) (<= main_~a~0 main_~b~0) (<= (+ .cse1 main_~a~0) .cse0)))) [2020-10-24 02:29:52,758 INFO L277 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: true [2020-10-24 02:29:52,759 INFO L277 CegarLoopResult]: At program point mainEXIT(lines 24 49) the Hoare annotation is: true [2020-10-24 02:29:52,759 INFO L270 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: (let ((.cse1 (+ main_~j~0 main_~b~0 1)) (.cse0 (+ main_~i~0 main_~a~0))) (let ((.cse5 (* 2 main_~i~0)) (.cse4 (<= .cse1 .cse0))) (or (let ((.cse3 (+ (* 2 main_~j~0) main_~b~0 2)) (.cse2 (+ .cse5 main_~a~0))) (and (<= .cse0 .cse1) (<= .cse2 .cse3) (<= 4 main_~i~0) (<= main_~i~0 (* 2 (div main_~i~0 2))) .cse4 (<= .cse3 .cse2))) (and (<= (+ .cse5 main_~j~0 main_~a~0) (+ main_~b~0 5)) (<= (+ main_~b~0 7) (+ (* 3 main_~i~0) main_~j~0 main_~a~0)) .cse4 (= main_~j~0 1)) (= main_~flag~0 0)))) [2020-10-24 02:29:52,759 INFO L270 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (let ((.cse5 (+ (* 3 main_~i~0) main_~a~0 3)) (.cse4 (+ (* 3 main_~j~0) main_~b~0)) (.cse7 (+ main_~j~0 main_~b~0)) (.cse6 (+ main_~i~0 main_~a~0 1))) (let ((.cse0 (<= .cse7 .cse6)) (.cse1 (<= .cse5 .cse4)) (.cse2 (<= .cse6 .cse7)) (.cse3 (<= .cse4 .cse5))) (or (and (= main_~i~0 0) (= main_~b~0 0) (= main_~a~0 0) (= main_~j~0 1)) (= main_~flag~0 0) (and .cse0 (<= 4 main_~i~0) .cse1 .cse2 .cse3 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 (<= main_~i~0 2) .cse3)))) [2020-10-24 02:29:52,759 INFO L270 CegarLoopResult]: At program point L36-1(line 36) the Hoare annotation is: (let ((.cse7 (* 3 main_~i~0))) (let ((.cse6 (+ .cse7 main_~a~0 3)) (.cse5 (+ (* 3 main_~j~0) main_~b~0))) (let ((.cse0 (<= (+ .cse7 |main_#t~post5| 3) .cse5)) (.cse1 (<= (+ main_~i~0 |main_#t~post5| 1) (+ main_~j~0 main_~b~0))) (.cse2 (<= .cse6 .cse5)) (.cse3 (<= (+ (* 2 main_~j~0) main_~b~0) (+ (* 2 main_~i~0) |main_#t~post5| 2))) (.cse4 (<= .cse5 .cse6))) (or (and (= main_~i~0 0) (= |main_#t~post5| 0) (= main_~b~0 0) (= main_~a~0 0) (= main_~j~0 1)) (= main_~flag~0 0) (and .cse0 .cse1 (<= 4 main_~i~0) .cse2 .cse3 .cse4 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 (<= main_~i~0 2) .cse3 .cse4))))) [2020-10-24 02:29:52,760 INFO L270 CegarLoopResult]: At program point L36-2(line 36) the Hoare annotation is: (let ((.cse6 (* 2 main_~i~0))) (let ((.cse7 (+ .cse6 main_~a~0 1)) (.cse5 (+ (* 2 main_~j~0) main_~b~0))) (let ((.cse0 (<= (+ (* 3 main_~i~0) |main_#t~post5| 3) (+ (* 3 main_~j~0) main_~b~0))) (.cse1 (<= (+ main_~i~0 |main_#t~post5| 1) (+ main_~j~0 main_~b~0))) (.cse2 (<= .cse7 .cse5)) (.cse3 (<= .cse5 .cse7)) (.cse4 (<= .cse5 (+ .cse6 |main_#t~post5| 2)))) (or (= main_~flag~0 0) (and (<= main_~a~0 1) (= main_~i~0 0) (= |main_#t~post5| 0) (= main_~b~0 0) (<= 1 main_~a~0) (= main_~j~0 1)) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 .cse3 (<= main_~i~0 2) .cse4) (and .cse0 .cse1 .cse2 .cse3 (<= 4 main_~i~0) .cse4 (<= main_~i~0 (* 2 (div main_~i~0 2)))))))) [2020-10-24 02:29:52,760 INFO L270 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: (= main_~a~0 0) [2020-10-24 02:29:52,760 INFO L277 CegarLoopResult]: At program point L45(lines 45 47) the Hoare annotation is: true [2020-10-24 02:29:52,760 INFO L270 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (let ((.cse5 (+ (* 2 main_~i~0) main_~a~0 1)) (.cse4 (+ (* 2 main_~j~0) main_~b~0)) (.cse7 (+ main_~i~0 main_~a~0)) (.cse6 (+ main_~j~0 main_~b~0))) (let ((.cse0 (<= .cse7 .cse6)) (.cse1 (<= .cse6 .cse7)) (.cse2 (<= .cse5 .cse4)) (.cse3 (<= .cse4 .cse5))) (or (and .cse0 .cse1 .cse2 .cse3 (<= 4 main_~i~0) (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 .cse3 (<= main_~i~0 2)) (= main_~flag~0 0) (and (<= main_~a~0 1) (= main_~i~0 0) (= main_~b~0 0) (<= 1 main_~a~0) (= main_~j~0 1))))) [2020-10-24 02:29:52,760 INFO L270 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: (= main_~flag~0 0) [2020-10-24 02:29:52,761 INFO L270 CegarLoopResult]: At program point L29(line 29) the Hoare annotation is: (and (= main_~a~0 0) (= main_~b~0 0)) [2020-10-24 02:29:52,761 INFO L277 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: true [2020-10-24 02:29:52,761 INFO L277 CegarLoopResult]: At program point L25-1(line 25) the Hoare annotation is: true [2020-10-24 02:29:52,761 INFO L277 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: true [2020-10-24 02:29:52,761 INFO L270 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: (let ((.cse1 (* 4294967296 (div main_~b~0 4294967296))) (.cse0 (+ (* 4294967296 (div main_~a~0 4294967296)) main_~b~0))) (and (< .cse0 (+ .cse1 main_~a~0 1)) (<= main_~a~0 main_~b~0) (<= (+ .cse1 main_~a~0) .cse0))) [2020-10-24 02:29:52,761 INFO L277 CegarLoopResult]: At program point mainFINAL(lines 24 49) the Hoare annotation is: true [2020-10-24 02:29:52,761 INFO L270 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: (= main_~flag~0 0) [2020-10-24 02:29:52,762 INFO L270 CegarLoopResult]: At program point L42-1(line 42) the Hoare annotation is: (= main_~flag~0 0) [2020-10-24 02:29:52,762 INFO L270 CegarLoopResult]: At program point L42-2(line 42) the Hoare annotation is: (= main_~flag~0 0) [2020-10-24 02:29:52,762 INFO L270 CegarLoopResult]: At program point L38(line 38) the Hoare annotation is: (let ((.cse7 (+ (* 3 main_~i~0) main_~a~0 3)) (.cse6 (+ (* 3 main_~j~0) main_~b~0)) (.cse9 (+ main_~j~0 main_~b~0)) (.cse8 (+ main_~i~0 main_~a~0 1))) (let ((.cse2 (<= .cse9 .cse8)) (.cse3 (<= .cse7 .cse6)) (.cse4 (<= .cse8 .cse9)) (.cse5 (<= .cse6 .cse7))) (or (= main_~flag~0 0) (let ((.cse1 (+ main_~i~0 main_~b~0 1)) (.cse0 (+ main_~j~0 main_~a~0))) (and (= main_~i~0 0) (<= .cse0 .cse1) (<= .cse1 .cse0) (= main_~j~0 1))) (and .cse2 (<= 4 main_~i~0) .cse3 .cse4 .cse5 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse2 .cse3 .cse4 (<= main_~i~0 2) .cse5)))) [2020-10-24 02:29:52,762 INFO L270 CegarLoopResult]: At program point L30(lines 30 34) the Hoare annotation is: (and (= main_~a~0 0) (= main_~b~0 0) (= main_~j~0 1)) [2020-10-24 02:29:52,762 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 24 49) the Hoare annotation is: true [2020-10-24 02:29:52,763 INFO L277 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-10-24 02:29:52,763 INFO L277 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: true [2020-10-24 02:29:52,763 INFO L277 CegarLoopResult]: At program point L26-2(line 26) the Hoare annotation is: true [2020-10-24 02:29:52,763 INFO L270 CegarLoopResult]: At program point L39(lines 39 43) the Hoare annotation is: (let ((.cse1 (+ main_~j~0 main_~b~0 1)) (.cse0 (+ main_~i~0 main_~a~0))) (let ((.cse5 (* 2 main_~i~0)) (.cse4 (<= .cse1 .cse0))) (or (let ((.cse3 (+ (* 2 main_~j~0) main_~b~0 2)) (.cse2 (+ .cse5 main_~a~0))) (and (<= .cse0 .cse1) (<= .cse2 .cse3) (<= 4 main_~i~0) (<= main_~i~0 (* 2 (div main_~i~0 2))) .cse4 (<= .cse3 .cse2))) (and (<= (+ .cse5 main_~j~0 main_~a~0) (+ main_~b~0 5)) (<= (+ main_~b~0 7) (+ (* 3 main_~i~0) main_~j~0 main_~a~0)) .cse4 (= main_~j~0 1)) (= main_~flag~0 0)))) [2020-10-24 02:29:52,763 INFO L270 CegarLoopResult]: At program point L39-2(lines 24 49) the Hoare annotation is: (let ((.cse5 (+ (* 3 main_~i~0) main_~a~0 3)) (.cse4 (+ (* 3 main_~j~0) main_~b~0)) (.cse7 (+ main_~j~0 main_~b~0)) (.cse6 (+ main_~i~0 main_~a~0 1))) (let ((.cse0 (<= .cse7 .cse6)) (.cse1 (<= .cse5 .cse4)) (.cse2 (<= .cse6 .cse7)) (.cse3 (<= .cse4 .cse5))) (or (and (= main_~i~0 0) (= main_~a~0 0) (= main_~b~0 0) (= main_~j~0 1)) (= main_~flag~0 0) (and .cse0 (<= 4 main_~i~0) .cse1 .cse2 .cse3 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 (<= main_~i~0 2) .cse3)))) [2020-10-24 02:29:52,764 INFO L270 CegarLoopResult]: At program point L35(lines 35 44) the Hoare annotation is: (let ((.cse5 (+ (* 3 main_~i~0) main_~a~0 3)) (.cse4 (+ (* 3 main_~j~0) main_~b~0)) (.cse7 (+ main_~j~0 main_~b~0)) (.cse6 (+ main_~i~0 main_~a~0 1))) (let ((.cse0 (<= .cse7 .cse6)) (.cse1 (<= .cse5 .cse4)) (.cse2 (<= .cse6 .cse7)) (.cse3 (<= .cse4 .cse5))) (or (and (= main_~i~0 0) (= main_~a~0 0) (= main_~b~0 0) (= main_~j~0 1)) (= main_~flag~0 0) (and .cse0 (<= 4 main_~i~0) .cse1 .cse2 .cse3 (<= main_~i~0 (* 2 (div main_~i~0 2)))) (and (<= 2 main_~i~0) .cse0 .cse1 .cse2 (<= main_~i~0 2) .cse3)))) [2020-10-24 02:29:52,764 INFO L270 CegarLoopResult]: At program point L35-1(line 35) the Hoare annotation is: (or (= main_~flag~0 0) (let ((.cse1 (* 4294967296 (div main_~b~0 4294967296))) (.cse0 (+ (* 4294967296 (div main_~a~0 4294967296)) main_~b~0))) (and (< .cse0 (+ .cse1 main_~a~0 1)) (<= main_~a~0 main_~b~0) (<= (+ .cse1 main_~a~0) .cse0)))) [2020-10-24 02:29:52,764 INFO L277 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: true [2020-10-24 02:29:52,764 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-24 02:29:52,764 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: true [2020-10-24 02:29:52,764 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-24 02:29:52,764 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 02:29:52,765 INFO L270 CegarLoopResult]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-24 02:29:52,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:29:52 BoogieIcfgContainer [2020-10-24 02:29:52,776 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:29:52,778 INFO L168 Benchmark]: Toolchain (without parser) took 21375.66 ms. Allocated memory was 156.2 MB in the beginning and 283.1 MB in the end (delta: 126.9 MB). Free memory was 132.3 MB in the beginning and 119.1 MB in the end (delta: 13.2 MB). Peak memory consumption was 160.1 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:52,779 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 156.2 MB. Free memory is still 130.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:29:52,780 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.31 ms. Allocated memory is still 156.2 MB. Free memory was 131.7 MB in the beginning and 121.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:52,780 INFO L168 Benchmark]: Boogie Preprocessor took 61.73 ms. Allocated memory is still 156.2 MB. Free memory was 121.6 MB in the beginning and 120.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:52,781 INFO L168 Benchmark]: RCFGBuilder took 342.04 ms. Allocated memory is still 156.2 MB. Free memory was 120.0 MB in the beginning and 103.6 MB in the end (delta: 16.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:52,782 INFO L168 Benchmark]: TraceAbstraction took 20646.60 ms. Allocated memory was 156.2 MB in the beginning and 283.1 MB in the end (delta: 126.9 MB). Free memory was 139.2 MB in the beginning and 119.1 MB in the end (delta: 20.1 MB). Peak memory consumption was 165.8 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:52,785 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 156.2 MB. Free memory is still 130.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 278.31 ms. Allocated memory is still 156.2 MB. Free memory was 131.7 MB in the beginning and 121.6 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 61.73 ms. Allocated memory is still 156.2 MB. Free memory was 121.6 MB in the beginning and 120.2 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 342.04 ms. Allocated memory is still 156.2 MB. Free memory was 120.0 MB in the beginning and 103.6 MB in the end (delta: 16.4 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 20646.60 ms. Allocated memory was 156.2 MB in the beginning and 283.1 MB in the end (delta: 126.9 MB). Free memory was 139.2 MB in the beginning and 119.1 MB in the end (delta: 20.1 MB). Peak memory consumption was 165.8 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 - 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, 62 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 11.5s, OverallIterations: 8, TraceHistogramMax: 5, AutomataDifference: 8.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 9.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 348 SDtfs, 585 SDslu, 755 SDs, 0 SdLazy, 1792 SolverSat, 82 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 177 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 8 MinimizatonAttempts, 17 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 57 LocationsWithAnnotation, 147 PreInvPairs, 229 NumberOfFragments, 1402 HoareAnnotationTreeSize, 147 FomulaSimplifications, 6557 FormulaSimplificationTreeSizeReduction, 0.3s HoareSimplificationTime, 57 FomulaSimplificationsInter, 2511 FormulaSimplificationTreeSizeReductionInter, 8.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 394 NumberOfCodeBlocks, 394 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 386 ConstructedInterpolants, 0 QuantifiedInterpolants, 205796 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 25/154 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...