/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-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:28:53,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:28:53,203 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:28:53,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:28:53,298 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:28:53,299 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:28:53,301 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:28:53,302 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:28:53,315 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:28:53,319 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:28:53,326 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:28:53,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:28:53,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:28:53,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:28:53,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:28:53,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:28:53,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:28:53,363 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:28:53,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:28:53,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:28:53,366 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 02:28:53,390 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:28:53,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:28:53,396 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:28:53,396 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:28:53,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:28:53,397 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:28:53,397 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:28:53,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:28:53,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:28:53,398 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:28:53,399 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:28:53,399 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:28:53,399 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:28:53,400 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:28:53,400 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:28:53,400 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:28:53,401 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:28:53,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:28:53,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:28:53,401 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:28:53,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:28:53,402 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:28:53,402 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:28:53,799 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:28:53,826 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:28:53,829 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:28:53,830 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:28:53,831 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:28:53,832 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-10-24 02:28:53,910 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14531d9c2/8311b59ceb4240b4a506b914217a8789/FLAG7a2c3c069 [2020-10-24 02:28:54,476 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:28:54,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2020-10-24 02:28:54,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14531d9c2/8311b59ceb4240b4a506b914217a8789/FLAG7a2c3c069 [2020-10-24 02:28:54,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/14531d9c2/8311b59ceb4240b4a506b914217a8789 [2020-10-24 02:28:54,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:28:54,861 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:28:54,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:28:54,865 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:28:54,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:28:54,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:28:54" (1/1) ... [2020-10-24 02:28:54,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e97308f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:54, skipping insertion in model container [2020-10-24 02:28:54,880 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:28:54" (1/1) ... [2020-10-24 02:28:54,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:28:54,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:28:55,109 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:28:55,119 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:28:55,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:28:55,157 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:28:55,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:55 WrapperNode [2020-10-24 02:28:55,157 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:28:55,159 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:28:55,159 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:28:55,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:28:55,173 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:55" (1/1) ... [2020-10-24 02:28:55,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:55" (1/1) ... [2020-10-24 02:28:55,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:55" (1/1) ... [2020-10-24 02:28:55,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:55" (1/1) ... [2020-10-24 02:28:55,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:55" (1/1) ... [2020-10-24 02:28:55,192 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:55" (1/1) ... [2020-10-24 02:28:55,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:55" (1/1) ... [2020-10-24 02:28:55,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:28:55,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:28:55,198 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:28:55,198 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:28:55,199 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:55" (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 02:28:55,283 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:28:55,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:28:55,284 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:28:55,284 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-24 02:28:55,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:28:55,284 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:28:55,284 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:28:55,285 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:28:55,285 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 02:28:55,285 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 02:28:55,285 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:28:55,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:28:55,285 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-24 02:28:55,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:28:55,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:28:55,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:28:55,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:28:55,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:28:55,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:28:55,286 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:28:55,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:28:55,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:28:55,825 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:28:55,826 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-24 02:28:55,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:28:55 BoogieIcfgContainer [2020-10-24 02:28:55,828 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:28:55,830 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:28:55,830 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:28:55,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:28:55,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:28:54" (1/3) ... [2020-10-24 02:28:55,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fce8ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:28:55, skipping insertion in model container [2020-10-24 02:28:55,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:28:55" (2/3) ... [2020-10-24 02:28:55,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fce8ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:28:55, skipping insertion in model container [2020-10-24 02:28:55,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:28:55" (3/3) ... [2020-10-24 02:28:55,837 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-10-24 02:28:55,849 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:28:55,855 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:28:55,868 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:28:55,894 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:28:55,894 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:28:55,894 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:28:55,895 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:28:55,895 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:28:55,895 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:28:55,895 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:28:55,895 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:28:55,913 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states. [2020-10-24 02:28:55,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-24 02:28:55,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:55,923 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:55,924 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:55,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:55,931 INFO L82 PathProgramCache]: Analyzing trace with hash 858751077, now seen corresponding path program 1 times [2020-10-24 02:28:55,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:55,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [433867172] [2020-10-24 02:28:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:56,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:56,281 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 02:28:56,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [433867172] [2020-10-24 02:28:56,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:28:56,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 02:28:56,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863880620] [2020-10-24 02:28:56,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:28:56,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:56,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:28:56,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:28:56,309 INFO L87 Difference]: Start difference. First operand 63 states. Second operand 6 states. [2020-10-24 02:28:56,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:56,769 INFO L93 Difference]: Finished difference Result 104 states and 130 transitions. [2020-10-24 02:28:56,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:28:56,771 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 36 [2020-10-24 02:28:56,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:56,782 INFO L225 Difference]: With dead ends: 104 [2020-10-24 02:28:56,782 INFO L226 Difference]: Without dead ends: 57 [2020-10-24 02:28:56,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:28:56,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-24 02:28:56,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-24 02:28:56,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-24 02:28:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-24 02:28:56,847 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 36 [2020-10-24 02:28:56,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:56,848 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-24 02:28:56,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:28:56,849 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-24 02:28:56,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-24 02:28:56,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:56,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:56,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:28:56,852 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:56,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:56,853 INFO L82 PathProgramCache]: Analyzing trace with hash -2108867889, now seen corresponding path program 1 times [2020-10-24 02:28:56,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:56,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831858554] [2020-10-24 02:28:56,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:56,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:56,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:57,020 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 02:28:57,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831858554] [2020-10-24 02:28:57,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:28:57,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-24 02:28:57,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611551644] [2020-10-24 02:28:57,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:28:57,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:57,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:28:57,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:28:57,030 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 7 states. [2020-10-24 02:28:57,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:57,623 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-10-24 02:28:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 02:28:57,624 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-24 02:28:57,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:57,627 INFO L225 Difference]: With dead ends: 101 [2020-10-24 02:28:57,627 INFO L226 Difference]: Without dead ends: 97 [2020-10-24 02:28:57,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-10-24 02:28:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-24 02:28:57,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2020-10-24 02:28:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-24 02:28:57,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2020-10-24 02:28:57,654 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 38 [2020-10-24 02:28:57,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:57,655 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2020-10-24 02:28:57,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:28:57,655 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2020-10-24 02:28:57,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-24 02:28:57,657 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:57,657 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:57,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:28:57,658 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:57,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:57,659 INFO L82 PathProgramCache]: Analyzing trace with hash -819884979, now seen corresponding path program 1 times [2020-10-24 02:28:57,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:57,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077893053] [2020-10-24 02:28:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:57,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:57,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-24 02:28:57,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:28:57,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077893053] [2020-10-24 02:28:57,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:28:57,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 02:28:57,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413290060] [2020-10-24 02:28:57,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:28:57,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:57,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:28:57,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:28:57,783 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand 6 states. [2020-10-24 02:28:58,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:58,118 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2020-10-24 02:28:58,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 02:28:58,119 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-24 02:28:58,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:58,122 INFO L225 Difference]: With dead ends: 97 [2020-10-24 02:28:58,123 INFO L226 Difference]: Without dead ends: 93 [2020-10-24 02:28:58,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-10-24 02:28:58,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-24 02:28:58,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2020-10-24 02:28:58,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-24 02:28:58,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-10-24 02:28:58,149 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 41 [2020-10-24 02:28:58,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:58,150 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-10-24 02:28:58,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:28:58,150 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-10-24 02:28:58,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-24 02:28:58,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:58,152 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:58,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:28:58,152 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:58,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:58,153 INFO L82 PathProgramCache]: Analyzing trace with hash 446664225, now seen corresponding path program 1 times [2020-10-24 02:28:58,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:58,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362159994] [2020-10-24 02:28:58,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:58,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:58,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-24 02:28:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:58,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:28:58,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1362159994] [2020-10-24 02:28:58,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:28:58,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-24 02:28:58,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313023396] [2020-10-24 02:28:58,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 02:28:58,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:58,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 02:28:58,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:28:58,301 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 9 states. [2020-10-24 02:28:59,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:59,131 INFO L93 Difference]: Finished difference Result 148 states and 173 transitions. [2020-10-24 02:28:59,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-24 02:28:59,133 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-24 02:28:59,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:59,139 INFO L225 Difference]: With dead ends: 148 [2020-10-24 02:28:59,140 INFO L226 Difference]: Without dead ends: 144 [2020-10-24 02:28:59,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-10-24 02:28:59,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-24 02:28:59,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 92. [2020-10-24 02:28:59,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-24 02:28:59,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2020-10-24 02:28:59,167 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 47 [2020-10-24 02:28:59,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:59,168 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2020-10-24 02:28:59,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 02:28:59,168 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2020-10-24 02:28:59,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-24 02:28:59,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:59,169 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:59,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:28:59,170 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:59,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:59,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1244017404, now seen corresponding path program 1 times [2020-10-24 02:28:59,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:59,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [365040623] [2020-10-24 02:28:59,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:59,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:59,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:59,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:28:59,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [365040623] [2020-10-24 02:28:59,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:28:59,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-24 02:28:59,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960469415] [2020-10-24 02:28:59,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-24 02:28:59,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:59,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-24 02:28:59,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:28:59,266 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand 7 states. [2020-10-24 02:28:59,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:28:59,752 INFO L93 Difference]: Finished difference Result 205 states and 247 transitions. [2020-10-24 02:28:59,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-24 02:28:59,753 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-10-24 02:28:59,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:28:59,755 INFO L225 Difference]: With dead ends: 205 [2020-10-24 02:28:59,755 INFO L226 Difference]: Without dead ends: 137 [2020-10-24 02:28:59,757 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-24 02:28:59,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-24 02:28:59,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 97. [2020-10-24 02:28:59,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-24 02:28:59,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-10-24 02:28:59,816 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 47 [2020-10-24 02:28:59,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:28:59,817 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-10-24 02:28:59,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-24 02:28:59,817 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-10-24 02:28:59,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-24 02:28:59,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:28:59,826 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:28:59,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 02:28:59,827 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:28:59,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:28:59,827 INFO L82 PathProgramCache]: Analyzing trace with hash -668258906, now seen corresponding path program 1 times [2020-10-24 02:28:59,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:28:59,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197897937] [2020-10-24 02:28:59,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:28:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:59,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:28:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:59,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-24 02:28:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:59,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-24 02:28:59,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:28:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-24 02:28:59,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197897937] [2020-10-24 02:28:59,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:28:59,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-24 02:28:59,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616572136] [2020-10-24 02:28:59,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 02:28:59,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:28:59,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 02:28:59,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-24 02:28:59,997 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 9 states. [2020-10-24 02:29:00,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:00,725 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2020-10-24 02:29:00,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 02:29:00,726 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-24 02:29:00,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:00,728 INFO L225 Difference]: With dead ends: 122 [2020-10-24 02:29:00,728 INFO L226 Difference]: Without dead ends: 118 [2020-10-24 02:29:00,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-24 02:29:00,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-24 02:29:00,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 102. [2020-10-24 02:29:00,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-24 02:29:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 114 transitions. [2020-10-24 02:29:00,758 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 114 transitions. Word has length 55 [2020-10-24 02:29:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:00,758 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 114 transitions. [2020-10-24 02:29:00,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 02:29:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 114 transitions. [2020-10-24 02:29:00,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-24 02:29:00,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:00,760 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:00,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 02:29:00,761 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:00,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:00,762 INFO L82 PathProgramCache]: Analyzing trace with hash 821148234, now seen corresponding path program 1 times [2020-10-24 02:29:00,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:00,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647386033] [2020-10-24 02:29:00,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:00,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:00,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-24 02:29:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:00,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-24 02:29:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:00,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-24 02:29:00,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647386033] [2020-10-24 02:29:00,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-24 02:29:00,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-24 02:29:00,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746551964] [2020-10-24 02:29:00,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 02:29:00,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:00,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 02:29:00,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:29:00,942 INFO L87 Difference]: Start difference. First operand 102 states and 114 transitions. Second operand 11 states. [2020-10-24 02:29:01,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:01,916 INFO L93 Difference]: Finished difference Result 151 states and 176 transitions. [2020-10-24 02:29:01,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-24 02:29:01,917 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2020-10-24 02:29:01,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:01,922 INFO L225 Difference]: With dead ends: 151 [2020-10-24 02:29:01,922 INFO L226 Difference]: Without dead ends: 147 [2020-10-24 02:29:01,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-24 02:29:01,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-24 02:29:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 85. [2020-10-24 02:29:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-24 02:29:01,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2020-10-24 02:29:01,953 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 59 [2020-10-24 02:29:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:01,955 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2020-10-24 02:29:01,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 02:29:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2020-10-24 02:29:01,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-24 02:29:01,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:29:01,958 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:29:01,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 02:29:01,959 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:29:01,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:29:01,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1543512790, now seen corresponding path program 1 times [2020-10-24 02:29:01,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:29:01,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670409786] [2020-10-24 02:29:01,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:29:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:02,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:29:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:02,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-10-24 02:29:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:02,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-10-24 02:29:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:02,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-10-24 02:29:02,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:29:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-24 02:29:02,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670409786] [2020-10-24 02:29:02,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:29:02,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-24 02:29:02,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863775630] [2020-10-24 02:29:02,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-24 02:29:02,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:29:02,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-24 02:29:02,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-24 02:29:02,190 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand 11 states. [2020-10-24 02:29:03,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:29:03,164 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2020-10-24 02:29:03,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-24 02:29:03,165 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-10-24 02:29:03,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:29:03,166 INFO L225 Difference]: With dead ends: 107 [2020-10-24 02:29:03,166 INFO L226 Difference]: Without dead ends: 0 [2020-10-24 02:29:03,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2020-10-24 02:29:03,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-24 02:29:03,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-24 02:29:03,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-24 02:29:03,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-24 02:29:03,170 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 64 [2020-10-24 02:29:03,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:29:03,170 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-24 02:29:03,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-24 02:29:03,170 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-24 02:29:03,170 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-24 02:29:03,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 02:29:03,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-24 02:29:04,452 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 19 [2020-10-24 02:29:04,851 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 14 [2020-10-24 02:29:05,933 INFO L277 CegarLoopResult]: At program point reach_errorEXIT(line 12) the Hoare annotation is: true [2020-10-24 02:29:05,934 INFO L277 CegarLoopResult]: At program point reach_errorENTRY(line 12) the Hoare annotation is: true [2020-10-24 02:29:05,934 INFO L277 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-10-24 02:29:05,934 INFO L277 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-10-24 02:29:05,934 INFO L277 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-10-24 02:29:05,934 INFO L277 CegarLoopResult]: At program point reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: true [2020-10-24 02:29:05,935 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 02:29:05,935 INFO L277 CegarLoopResult]: At program point L-1-1(line -1) the Hoare annotation is: true [2020-10-24 02:29:05,935 INFO L277 CegarLoopResult]: At program point ULTIMATE.initFINAL(line 12) the Hoare annotation is: true [2020-10-24 02:29:05,935 INFO L277 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-10-24 02:29:05,935 INFO L277 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-10-24 02:29:05,935 INFO L277 CegarLoopResult]: At program point L12-2(line 12) the Hoare annotation is: true [2020-10-24 02:29:05,936 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 02:29:05,936 INFO L277 CegarLoopResult]: At program point L12-3(line 12) the Hoare annotation is: true [2020-10-24 02:29:05,942 INFO L277 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-10-24 02:29:05,942 INFO L277 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-10-24 02:29:05,942 INFO L277 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-24 02:29:05,942 INFO L277 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-24 02:29:05,942 INFO L277 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-10-24 02:29:05,943 INFO L274 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-10-24 02:29:05,943 INFO L274 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-10-24 02:29:05,945 INFO L274 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2020-10-24 02:29:05,945 INFO L274 CegarLoopResult]: For program point L15-3(lines 14 16) no Hoare annotation was computed. [2020-10-24 02:29:05,945 INFO L274 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2020-10-24 02:29:05,946 INFO L270 CegarLoopResult]: At program point L35-2(line 35) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-24 02:29:05,949 INFO L270 CegarLoopResult]: At program point L35-3(line 35) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2020-10-24 02:29:05,950 INFO L277 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: true [2020-10-24 02:29:05,950 INFO L277 CegarLoopResult]: At program point L27-1(line 27) the Hoare annotation is: true [2020-10-24 02:29:05,950 INFO L277 CegarLoopResult]: At program point L27-2(line 27) the Hoare annotation is: true [2020-10-24 02:29:05,950 INFO L277 CegarLoopResult]: At program point mainEXIT(lines 24 48) the Hoare annotation is: true [2020-10-24 02:29:05,950 INFO L270 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-24 02:29:05,951 INFO L270 CegarLoopResult]: At program point L36-3(line 36) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= (+ |main_#t~post8| 1) main_~n~0) (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~k~0 1) main_~n~0) (<= .cse0 |main_#t~post8|) (<= (+ main_~j~0 1) main_~n~0))) [2020-10-24 02:29:05,951 INFO L270 CegarLoopResult]: At program point L36-4(line 36) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= (+ |main_#t~post8| 1) main_~n~0) (<= .cse0 main_~j~0) (<= .cse0 |main_#t~post8|) (<= (+ main_~j~0 1) main_~n~0) (<= (+ .cse0 1) main_~k~0) (<= main_~k~0 main_~n~0))) [2020-10-24 02:29:05,951 INFO L270 CegarLoopResult]: At program point L36-5(lines 36 38) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0))) [2020-10-24 02:29:05,951 INFO L277 CegarLoopResult]: At program point L28(line 28) the Hoare annotation is: true [2020-10-24 02:29:05,952 INFO L277 CegarLoopResult]: At program point L28-1(line 28) the Hoare annotation is: true [2020-10-24 02:29:05,952 INFO L270 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2020-10-24 02:29:05,952 INFO L270 CegarLoopResult]: At program point L41-1(line 41) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2020-10-24 02:29:05,952 INFO L270 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~k~0 1) main_~n~0) (<= (+ main_~j~0 1) main_~n~0))) [2020-10-24 02:29:05,952 INFO L270 CegarLoopResult]: At program point L37-1(lines 36 38) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~k~0 1) main_~n~0) (<= (+ main_~j~0 1) main_~n~0))) [2020-10-24 02:29:05,953 INFO L270 CegarLoopResult]: At program point L33-2(lines 33 45) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-24 02:29:05,953 INFO L270 CegarLoopResult]: At program point L33-3(line 33) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-24 02:29:05,953 INFO L277 CegarLoopResult]: At program point L29(lines 29 32) the Hoare annotation is: true [2020-10-24 02:29:05,953 INFO L270 CegarLoopResult]: At program point L33-4(line 33) the Hoare annotation is: (and (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-24 02:29:05,953 INFO L270 CegarLoopResult]: At program point L29-1(lines 29 32) the Hoare annotation is: (and (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-24 02:29:05,953 INFO L270 CegarLoopResult]: At program point L33-5(lines 33 45) the Hoare annotation is: (and (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-24 02:29:05,954 INFO L277 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: true [2020-10-24 02:29:05,954 INFO L277 CegarLoopResult]: At program point L25-1(line 25) the Hoare annotation is: true [2020-10-24 02:29:05,954 INFO L277 CegarLoopResult]: At program point L25-2(line 25) the Hoare annotation is: true [2020-10-24 02:29:05,957 INFO L277 CegarLoopResult]: At program point L46(lines 24 48) the Hoare annotation is: true [2020-10-24 02:29:05,957 INFO L277 CegarLoopResult]: At program point mainFINAL(lines 24 48) the Hoare annotation is: true [2020-10-24 02:29:05,957 INFO L270 CegarLoopResult]: At program point L42(lines 34 44) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-24 02:29:05,958 INFO L270 CegarLoopResult]: At program point L34(line 34) the Hoare annotation is: (and (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-24 02:29:05,958 INFO L270 CegarLoopResult]: At program point L34-3(line 34) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~n~0 main_~k~0) (<= .cse0 |main_#t~post6|) (<= main_~k~0 main_~n~0))) [2020-10-24 02:29:05,958 INFO L270 CegarLoopResult]: At program point L34-4(line 34) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= (+ .cse0 1) main_~j~0) (<= main_~n~0 main_~k~0) (<= .cse0 |main_#t~post6|) (<= main_~k~0 main_~n~0))) [2020-10-24 02:29:05,958 INFO L277 CegarLoopResult]: At program point mainENTRY(lines 24 48) the Hoare annotation is: true [2020-10-24 02:29:05,958 INFO L270 CegarLoopResult]: At program point L34-5(lines 34 44) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-24 02:29:05,958 INFO L277 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: true [2020-10-24 02:29:05,959 INFO L277 CegarLoopResult]: At program point L26-1(line 26) the Hoare annotation is: true [2020-10-24 02:29:05,959 INFO L277 CegarLoopResult]: At program point L26-2(line 26) the Hoare annotation is: true [2020-10-24 02:29:05,960 INFO L270 CegarLoopResult]: At program point L35(line 35) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-24 02:29:05,960 INFO L270 CegarLoopResult]: At program point L35-1(lines 35 43) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2020-10-24 02:29:05,961 INFO L270 CegarLoopResult]: At program point L18-2(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-24 02:29:05,961 INFO L277 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2020-10-24 02:29:05,961 INFO L270 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 17 22) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-10-24 02:29:05,961 INFO L270 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-24 02:29:05,961 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 02:29:05,961 INFO L270 CegarLoopResult]: At program point L19-1(line 19) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-10-24 02:29:05,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:29:05 BoogieIcfgContainer [2020-10-24 02:29:05,994 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:29:06,006 INFO L168 Benchmark]: Toolchain (without parser) took 11140.30 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 127.6 MB in the beginning and 231.2 MB in the end (delta: -103.6 MB). Peak memory consumption was 147.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:06,008 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 125.1 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:29:06,009 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.47 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 117.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:06,009 INFO L168 Benchmark]: Boogie Preprocessor took 38.47 ms. Allocated memory is still 151.0 MB. Free memory was 117.5 MB in the beginning and 115.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:06,010 INFO L168 Benchmark]: RCFGBuilder took 630.11 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 129.1 MB in the end (delta: -13.1 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:06,014 INFO L168 Benchmark]: TraceAbstraction took 10164.26 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 129.1 MB in the beginning and 231.2 MB in the end (delta: -102.1 MB). Peak memory consumption was 147.9 MB. Max. memory is 8.0 GB. [2020-10-24 02:29:06,026 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 151.0 MB. Free memory was 125.1 MB in the beginning and 125.1 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 293.47 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 117.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.47 ms. Allocated memory is still 151.0 MB. Free memory was 117.5 MB in the beginning and 115.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 630.11 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 129.1 MB in the end (delta: -13.1 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10164.26 ms. Allocated memory was 151.0 MB in the beginning and 262.1 MB in the end (delta: 111.1 MB). Free memory was 129.1 MB in the beginning and 231.2 MB in the end (delta: -102.1 MB). Peak memory consumption was 147.9 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: 33]: Loop Invariant Derived loop invariant: n <= k && k <= n - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (2 * i <= j && n <= k) && k <= n - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((2 * i <= j && 2 * i <= k) && j + 1 <= n) && k <= n - 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: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 68 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.2s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 461 SDtfs, 759 SDslu, 646 SDs, 0 SdLazy, 2251 SolverSat, 221 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 157 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=102occurred 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, 203 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 63 LocationsWithAnnotation, 207 PreInvPairs, 292 NumberOfFragments, 454 HoareAnnotationTreeSize, 207 FomulaSimplifications, 207654 FormulaSimplificationTreeSizeReduction, 1.1s HoareSimplificationTime, 63 FomulaSimplificationsInter, 7218 FormulaSimplificationTreeSizeReductionInter, 1.6s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 387 NumberOfCodeBlocks, 387 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 379 ConstructedInterpolants, 0 QuantifiedInterpolants, 51327 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 7 PerfectInterpolantSequences, 54/58 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...