/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/psyco/psyco_io_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:42:53,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:42:53,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:42:53,106 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 18:42:53,172 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:42:53,197 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:42:53,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:42:53,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:42:53,201 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:42:53,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:42:53,202 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:42:53,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:42:53,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:42:53,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:42:53,205 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:42:53,206 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:42:53,206 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:42:53,206 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:42:53,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:42:53,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:42:53,207 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:42:53,207 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:42:53,207 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:42:53,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:42:53,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:42:53,208 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:42:53,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:42:53,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:42:53,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:42:53,630 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:42:53,633 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:42:53,635 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:42:53,638 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:42:53,639 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_io_1.c [2021-02-23 18:42:53,733 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a308977d1/d8d52b771e614b49b9ace1bf004285df/FLAG3b41e2959 [2021-02-23 18:42:54,381 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:42:54,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_io_1.c [2021-02-23 18:42:54,393 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a308977d1/d8d52b771e614b49b9ace1bf004285df/FLAG3b41e2959 [2021-02-23 18:42:54,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a308977d1/d8d52b771e614b49b9ace1bf004285df [2021-02-23 18:42:54,769 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:42:54,785 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:42:54,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:42:54,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:42:54,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:42:54,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:42:54" (1/1) ... [2021-02-23 18:42:54,798 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f050024 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:42:54, skipping insertion in model container [2021-02-23 18:42:54,798 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:42:54" (1/1) ... [2021-02-23 18:42:54,807 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:42:54,859 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:42:55,038 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_io_1.c[11478,11491] [2021-02-23 18:42:55,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:42:55,057 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:42:55,112 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_io_1.c[11478,11491] [2021-02-23 18:42:55,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:42:55,140 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:42:55,141 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:42:55 WrapperNode [2021-02-23 18:42:55,141 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:42:55,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:42:55,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:42:55,143 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:42:55,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:42:55" (1/1) ... [2021-02-23 18:42:55,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:42:55" (1/1) ... [2021-02-23 18:42:55,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:42:55" (1/1) ... [2021-02-23 18:42:55,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:42:55" (1/1) ... [2021-02-23 18:42:55,180 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:42:55" (1/1) ... [2021-02-23 18:42:55,191 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:42:55" (1/1) ... [2021-02-23 18:42:55,194 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:42:55" (1/1) ... [2021-02-23 18:42:55,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:42:55,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:42:55,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:42:55,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:42:55,203 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:42:55" (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 [2021-02-23 18:42:55,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:42:55,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:42:55,327 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:42:55,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:42:55,327 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 18:42:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:42:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:42:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:42:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:42:55,328 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:42:55,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:42:55,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:42:55,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:42:55,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:42:55,329 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:42:55,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:42:56,133 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:42:56,134 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-02-23 18:42:56,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:42:56 BoogieIcfgContainer [2021-02-23 18:42:56,140 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:42:56,145 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:42:56,145 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:42:56,153 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:42:56,154 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:42:54" (1/3) ... [2021-02-23 18:42:56,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50546c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:42:56, skipping insertion in model container [2021-02-23 18:42:56,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:42:55" (2/3) ... [2021-02-23 18:42:56,159 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50546c10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:42:56, skipping insertion in model container [2021-02-23 18:42:56,159 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:42:56" (3/3) ... [2021-02-23 18:42:56,163 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_io_1.c [2021-02-23 18:42:56,180 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:42:56,191 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:42:56,214 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:42:56,264 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:42:56,270 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:42:56,270 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:42:56,270 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:42:56,270 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:42:56,270 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:42:56,271 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:42:56,271 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:42:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states. [2021-02-23 18:42:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-23 18:42:56,350 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:42:56,352 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:42:56,352 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:42:56,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:42:56,364 INFO L82 PathProgramCache]: Analyzing trace with hash 897627995, now seen corresponding path program 1 times [2021-02-23 18:42:56,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:42:56,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288984815] [2021-02-23 18:42:56,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:42:56,490 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:42:56,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:42:56,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:56,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:42:56,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:56,761 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:42:56,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:42:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:42:56,892 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:56,892 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:42:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:42:56,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288984815] [2021-02-23 18:42:56,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:42:56,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 18:42:56,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168368678] [2021-02-23 18:42:56,922 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 18:42:56,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:42:56,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 18:42:56,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 18:42:56,943 INFO L87 Difference]: Start difference. First operand 210 states. Second operand 3 states. [2021-02-23 18:42:57,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:42:57,274 INFO L93 Difference]: Finished difference Result 377 states and 491 transitions. [2021-02-23 18:42:57,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 18:42:57,277 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2021-02-23 18:42:57,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:42:57,296 INFO L225 Difference]: With dead ends: 377 [2021-02-23 18:42:57,297 INFO L226 Difference]: Without dead ends: 171 [2021-02-23 18:42:57,304 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 [2021-02-23 18:42:57,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-02-23 18:42:57,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-02-23 18:42:57,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-02-23 18:42:57,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 201 transitions. [2021-02-23 18:42:57,402 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 201 transitions. Word has length 43 [2021-02-23 18:42:57,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:42:57,403 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 201 transitions. [2021-02-23 18:42:57,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 18:42:57,403 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 201 transitions. [2021-02-23 18:42:57,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 18:42:57,410 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:42:57,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:42:57,411 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:42:57,411 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:42:57,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:42:57,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1048430808, now seen corresponding path program 1 times [2021-02-23 18:42:57,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:42:57,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889850322] [2021-02-23 18:42:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:42:57,422 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:42:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:42:57,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:57,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:42:57,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:57,527 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:42:57,536 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:57,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:42:57,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:42:57,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:42:57,651 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:57,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:42:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:42:57,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889850322] [2021-02-23 18:42:57,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:42:57,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 18:42:57,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020680636] [2021-02-23 18:42:57,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 18:42:57,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:42:57,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 18:42:57,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 18:42:57,668 INFO L87 Difference]: Start difference. First operand 171 states and 201 transitions. Second operand 4 states. [2021-02-23 18:42:58,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:42:58,144 INFO L93 Difference]: Finished difference Result 335 states and 396 transitions. [2021-02-23 18:42:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 18:42:58,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2021-02-23 18:42:58,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:42:58,147 INFO L225 Difference]: With dead ends: 335 [2021-02-23 18:42:58,147 INFO L226 Difference]: Without dead ends: 186 [2021-02-23 18:42:58,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 18:42:58,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-02-23 18:42:58,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2021-02-23 18:42:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-02-23 18:42:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 216 transitions. [2021-02-23 18:42:58,198 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 216 transitions. Word has length 44 [2021-02-23 18:42:58,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:42:58,198 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 216 transitions. [2021-02-23 18:42:58,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 18:42:58,199 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 216 transitions. [2021-02-23 18:42:58,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-02-23 18:42:58,201 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:42:58,201 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:42:58,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:42:58,202 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:42:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:42:58,202 INFO L82 PathProgramCache]: Analyzing trace with hash -102069769, now seen corresponding path program 1 times [2021-02-23 18:42:58,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:42:58,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185593886] [2021-02-23 18:42:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:42:58,350 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,376 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-02-23 18:42:58,440 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,444 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 133 [2021-02-23 18:42:58,445 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:42:58,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:42:58,531 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,534 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:42:58,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:42:58,542 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-23 18:42:58,543 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-23 18:42:58,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:42:58,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:42:58,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:42:58,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:42:58,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,632 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:42:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:42:58,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:42:58,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:42:58,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:42:58,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,667 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 18:42:58,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:42:58,671 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,673 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:42:58,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:42:58,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:42:58,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:42:58,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,684 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:42:58,698 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 138 [2021-02-23 18:42:58,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:42:58,714 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,723 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-02-23 18:42:58,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 138 [2021-02-23 18:42:58,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,820 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-02-23 18:42:58,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-02-23 18:42:58,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-02-23 18:42:58,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-02-23 18:42:58,952 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-02-23 18:42:58,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:58,995 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-02-23 18:42:59,044 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:59,051 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-02-23 18:42:59,099 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:59,101 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-02-23 18:42:59,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:59,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-02-23 18:42:59,245 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:59,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-02-23 18:42:59,301 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:59,303 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-02-23 18:42:59,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:59,366 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-02-23 18:42:59,439 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:59,443 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-02-23 18:42:59,509 WARN L141 QuantifierPusher]: treesize reduction 45, result has 44.4 percent of original size [2021-02-23 18:42:59,510 WARN L147 QuantifierPusher]: treesize reduction 45, result has 44.4 percent of original size 36 [2021-02-23 18:42:59,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:59,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-02-23 18:42:59,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:59,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-02-23 18:42:59,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:59,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 18:42:59,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:59,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 18:42:59,680 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-02-23 18:42:59,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:59,725 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-23 18:42:59,778 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:59,779 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-23 18:42:59,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:59,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-23 18:42:59,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:59,840 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-02-23 18:42:59,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:42:59,900 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-02-23 18:42:59,978 WARN L141 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size [2021-02-23 18:42:59,979 WARN L147 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size 1 [2021-02-23 18:42:59,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185593886] [2021-02-23 18:42:59,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:42:59,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-02-23 18:42:59,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086598360] [2021-02-23 18:42:59,981 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-23 18:42:59,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:42:59,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-23 18:42:59,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2021-02-23 18:42:59,982 INFO L87 Difference]: Start difference. First operand 186 states and 216 transitions. Second operand 25 states. [2021-02-23 18:43:00,348 WARN L202 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2021-02-23 18:43:00,480 WARN L202 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-02-23 18:43:00,635 WARN L202 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-02-23 18:43:00,771 WARN L202 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-02-23 18:43:00,916 WARN L202 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-02-23 18:43:01,067 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2021-02-23 18:43:01,213 WARN L202 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2021-02-23 18:43:01,354 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2021-02-23 18:43:01,511 WARN L202 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-02-23 18:43:01,711 WARN L202 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-02-23 18:43:02,306 WARN L202 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-02-23 18:43:02,593 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-02-23 18:43:03,006 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-02-23 18:43:03,238 WARN L202 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-02-23 18:43:03,428 WARN L202 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2021-02-23 18:43:03,650 WARN L202 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-02-23 18:43:03,845 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-02-23 18:43:04,090 WARN L202 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-02-23 18:43:04,351 WARN L202 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2021-02-23 18:43:04,603 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-02-23 18:43:04,801 WARN L202 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-02-23 18:43:05,037 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2021-02-23 18:43:05,274 WARN L202 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-02-23 18:43:05,512 WARN L202 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2021-02-23 18:43:05,730 WARN L202 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-02-23 18:43:06,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:43:06,862 INFO L93 Difference]: Finished difference Result 404 states and 474 transitions. [2021-02-23 18:43:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-23 18:43:06,863 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 66 [2021-02-23 18:43:06,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:43:06,866 INFO L225 Difference]: With dead ends: 404 [2021-02-23 18:43:06,866 INFO L226 Difference]: Without dead ends: 241 [2021-02-23 18:43:06,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=746, Invalid=2914, Unknown=0, NotChecked=0, Total=3660 [2021-02-23 18:43:06,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-02-23 18:43:06,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 225. [2021-02-23 18:43:06,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2021-02-23 18:43:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 259 transitions. [2021-02-23 18:43:06,933 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 259 transitions. Word has length 66 [2021-02-23 18:43:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:43:06,933 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 259 transitions. [2021-02-23 18:43:06,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-02-23 18:43:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 259 transitions. [2021-02-23 18:43:06,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-02-23 18:43:06,935 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:43:06,935 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:43:06,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 18:43:06,936 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:43:06,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:43:06,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1806423234, now seen corresponding path program 1 times [2021-02-23 18:43:06,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:43:06,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731459904] [2021-02-23 18:43:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:43:06,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:43:07,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 133 [2021-02-23 18:43:07,051 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:43:07,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-02-23 18:43:07,055 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-23 18:43:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:43:07,138 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:43:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:43:07,179 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:43:07,220 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:43:07,221 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:43:07,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 18:43:07,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:43:07 BoogieIcfgContainer [2021-02-23 18:43:07,240 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:43:07,242 INFO L168 Benchmark]: Toolchain (without parser) took 12469.49 ms. Allocated memory was 168.8 MB in the beginning and 293.6 MB in the end (delta: 124.8 MB). Free memory was 145.9 MB in the beginning and 152.9 MB in the end (delta: -6.9 MB). Peak memory consumption was 118.5 MB. Max. memory is 8.0 GB. [2021-02-23 18:43:07,242 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 168.8 MB. Free memory is still 141.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:43:07,243 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.98 ms. Allocated memory is still 168.8 MB. Free memory was 144.9 MB in the beginning and 133.3 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-02-23 18:43:07,244 INFO L168 Benchmark]: Boogie Preprocessor took 58.30 ms. Allocated memory is still 168.8 MB. Free memory was 133.3 MB in the beginning and 131.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:43:07,244 INFO L168 Benchmark]: RCFGBuilder took 938.10 ms. Allocated memory is still 168.8 MB. Free memory was 131.3 MB in the beginning and 126.6 MB in the end (delta: 4.7 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. [2021-02-23 18:43:07,245 INFO L168 Benchmark]: TraceAbstraction took 11095.45 ms. Allocated memory was 168.8 MB in the beginning and 293.6 MB in the end (delta: 124.8 MB). Free memory was 126.1 MB in the beginning and 152.9 MB in the end (delta: -26.7 MB). Peak memory consumption was 99.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:43:07,248 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 168.8 MB. Free memory is still 141.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 350.98 ms. Allocated memory is still 168.8 MB. Free memory was 144.9 MB in the beginning and 133.3 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.30 ms. Allocated memory is still 168.8 MB. Free memory was 133.3 MB in the beginning and 131.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 938.10 ms. Allocated memory is still 168.8 MB. Free memory was 131.3 MB in the beginning and 126.6 MB in the end (delta: 4.7 MB). Peak memory consumption was 17.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11095.45 ms. Allocated memory was 168.8 MB in the beginning and 293.6 MB in the end (delta: 124.8 MB). Free memory was 126.1 MB in the beginning and 152.9 MB in the end (delta: -26.7 MB). Peak memory consumption was 99.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 345]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L7] int m_flush = 1; [L8] int m_PipedOutputStream = 2; [L9] int m_close = 3; [L10] int m_write = 4; [L11] int m_connect_1 = 5; [L12] int m_connect_2 = 6; [L17] int q = 0; [L18] int method_id; [L21] int this_sink = 0; [L22] int this_sinkConnected = 0; [L25] COND TRUE 1 [L28] int P1=__VERIFIER_nondet_int(); [L29] int P2=__VERIFIER_nondet_int(); [L30] int P3=__VERIFIER_nondet_int(); [L31] int P4=__VERIFIER_nondet_int(); [L35] COND TRUE q == 0 [L36] COND TRUE __VERIFIER_nondet_int() [L40] method_id = 2 [L42] COND FALSE !(0) [L46] q = 2 [L48] this_sink=0 [L48] this_sinkConnected=0 [L25] COND TRUE 1 [L28] int P1=__VERIFIER_nondet_int(); [L29] int P2=__VERIFIER_nondet_int(); [L30] int P3=__VERIFIER_nondet_int(); [L31] int P4=__VERIFIER_nondet_int(); [L35] COND FALSE !(q == 0) [L55] COND FALSE !(q == 1) [L107] COND TRUE q == 2 [L108] COND FALSE !(__VERIFIER_nondet_int()) [L124] COND FALSE !(__VERIFIER_nondet_int()) [L140] COND FALSE !(__VERIFIER_nondet_int()) [L156] COND FALSE !(__VERIFIER_nondet_int()) [L172] COND TRUE __VERIFIER_nondet_int() [L176] method_id = 4 [L178] COND TRUE (this_sink != 0) [L345] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 213 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.9s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 7.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 602 SDtfs, 1019 SDslu, 82 SDs, 0 SdLazy, 1290 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 6.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=225occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 16 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 incorrect! Received shutdown request...