/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-b7b32d2 [2021-02-21 21:12:43,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:12:43,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:12:43,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:12:43,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:12:43,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:12:43,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:12:43,186 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:12:43,187 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:12:43,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:12:43,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:12:43,193 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:12:43,195 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:12:43,197 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:12:43,198 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:12:43,199 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:12:43,203 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:12:43,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:12:43,244 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:12:43,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:12:43,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:12:43,246 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:12:43,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:12:43,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:12:43,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:12:43,247 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:12:43,247 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:12:43,247 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:12:43,247 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:12:43,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:12:43,248 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:12:43,248 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:12:43,248 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:12:43,248 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:12:43,248 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:12:43,249 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:12:43,249 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:12:43,249 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:12:43,249 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:12:43,250 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:12:43,250 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:12:43,623 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:12:43,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:12:43,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:12:43,672 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:12:43,673 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:12:43,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_io_1.c [2021-02-21 21:12:43,766 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/012a81dd3/f8e95ed0e3b24fb185ac8f30076fd6ad/FLAG2eddb167e [2021-02-21 21:12:44,376 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:12:44,377 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_io_1.c [2021-02-21 21:12:44,394 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/012a81dd3/f8e95ed0e3b24fb185ac8f30076fd6ad/FLAG2eddb167e [2021-02-21 21:12:44,770 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/012a81dd3/f8e95ed0e3b24fb185ac8f30076fd6ad [2021-02-21 21:12:44,774 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:12:44,790 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:12:44,799 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:12:44,799 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:12:44,803 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:12:44,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:12:44" (1/1) ... [2021-02-21 21:12:44,805 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14a01da2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:44, skipping insertion in model container [2021-02-21 21:12:44,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:12:44" (1/1) ... [2021-02-21 21:12:44,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:12:44,874 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:12:45,168 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] [2021-02-21 21:12:45,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:12:45,195 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:12:45,242 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] [2021-02-21 21:12:45,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:12:45,261 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:12:45,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:45 WrapperNode [2021-02-21 21:12:45,262 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:12:45,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:12:45,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:12:45,264 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:12:45,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:45" (1/1) ... [2021-02-21 21:12:45,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:45" (1/1) ... [2021-02-21 21:12:45,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:45" (1/1) ... [2021-02-21 21:12:45,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:45" (1/1) ... [2021-02-21 21:12:45,299 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:45" (1/1) ... [2021-02-21 21:12:45,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:45" (1/1) ... [2021-02-21 21:12:45,312 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:45" (1/1) ... [2021-02-21 21:12:45,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:12:45,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:12:45,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:12:45,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:12:45,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:45" (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 [2021-02-21 21:12:45,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:12:45,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:12:45,431 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:12:45,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:12:45,431 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 21:12:45,431 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:12:45,432 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:12:45,432 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:12:45,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:12:45,432 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:12:45,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:12:45,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:12:45,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:12:45,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:12:45,433 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:12:45,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:12:46,055 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:12:46,055 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-02-21 21:12:46,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:12:46 BoogieIcfgContainer [2021-02-21 21:12:46,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:12:46,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:12:46,067 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:12:46,072 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:12:46,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:12:44" (1/3) ... [2021-02-21 21:12:46,074 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26855d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:12:46, skipping insertion in model container [2021-02-21 21:12:46,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:12:45" (2/3) ... [2021-02-21 21:12:46,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26855d02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:12:46, skipping insertion in model container [2021-02-21 21:12:46,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:12:46" (3/3) ... [2021-02-21 21:12:46,077 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_io_1.c [2021-02-21 21:12:46,088 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:12:46,094 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:12:46,112 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:12:46,138 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:12:46,139 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:12:46,139 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:12:46,139 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:12:46,139 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:12:46,139 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:12:46,140 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:12:46,140 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:12:46,163 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states. [2021-02-21 21:12:46,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-21 21:12:46,175 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:12:46,176 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] [2021-02-21 21:12:46,176 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:12:46,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:12:46,184 INFO L82 PathProgramCache]: Analyzing trace with hash 897627995, now seen corresponding path program 1 times [2021-02-21 21:12:46,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:12:46,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473259184] [2021-02-21 21:12:46,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:12:46,287 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:12:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:12:46,445 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:46,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:46,448 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:46,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:46,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:12:46,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:12:46,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:46,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:12:46,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473259184] [2021-02-21 21:12:46,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:12:46,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:12:46,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979950726] [2021-02-21 21:12:46,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:12:46,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:12:46,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:12:46,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:12:46,634 INFO L87 Difference]: Start difference. First operand 210 states. Second operand 3 states. [2021-02-21 21:12:46,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:12:46,978 INFO L93 Difference]: Finished difference Result 377 states and 491 transitions. [2021-02-21 21:12:46,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:12:46,980 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2021-02-21 21:12:46,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:12:46,999 INFO L225 Difference]: With dead ends: 377 [2021-02-21 21:12:46,999 INFO L226 Difference]: Without dead ends: 171 [2021-02-21 21:12:47,007 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 [2021-02-21 21:12:47,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-02-21 21:12:47,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-02-21 21:12:47,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-02-21 21:12:47,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 201 transitions. [2021-02-21 21:12:47,160 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 201 transitions. Word has length 43 [2021-02-21 21:12:47,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:12:47,161 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 201 transitions. [2021-02-21 21:12:47,161 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:12:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 201 transitions. [2021-02-21 21:12:47,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-21 21:12:47,164 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:12:47,164 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] [2021-02-21 21:12:47,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:12:47,165 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:12:47,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:12:47,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1048430808, now seen corresponding path program 1 times [2021-02-21 21:12:47,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:12:47,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740147976] [2021-02-21 21:12:47,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:12:47,169 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:12:47,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:12:47,233 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:47,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:47,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:47,235 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:12:47,239 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:47,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:47,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:12:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:12:47,294 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:47,294 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:47,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:12:47,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740147976] [2021-02-21 21:12:47,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:12:47,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 21:12:47,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944665906] [2021-02-21 21:12:47,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 21:12:47,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:12:47,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 21:12:47,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 21:12:47,303 INFO L87 Difference]: Start difference. First operand 171 states and 201 transitions. Second operand 4 states. [2021-02-21 21:12:47,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:12:47,946 INFO L93 Difference]: Finished difference Result 335 states and 396 transitions. [2021-02-21 21:12:47,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 21:12:47,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2021-02-21 21:12:47,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:12:47,949 INFO L225 Difference]: With dead ends: 335 [2021-02-21 21:12:47,950 INFO L226 Difference]: Without dead ends: 186 [2021-02-21 21:12:47,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:12:47,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-02-21 21:12:48,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2021-02-21 21:12:48,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-02-21 21:12:48,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 216 transitions. [2021-02-21 21:12:48,007 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 216 transitions. Word has length 44 [2021-02-21 21:12:48,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:12:48,008 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 216 transitions. [2021-02-21 21:12:48,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 21:12:48,008 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 216 transitions. [2021-02-21 21:12:48,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-02-21 21:12:48,011 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:12:48,011 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] [2021-02-21 21:12:48,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:12:48,012 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:12:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:12:48,012 INFO L82 PathProgramCache]: Analyzing trace with hash -102069769, now seen corresponding path program 1 times [2021-02-21 21:12:48,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:12:48,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072976756] [2021-02-21 21:12:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:12:48,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,171 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-02-21 21:12:48,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 133 [2021-02-21 21:12:48,241 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:12:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:12:48,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,383 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:48,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:12:48,389 WARN L141 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size [2021-02-21 21:12:48,392 WARN L147 QuantifierPusher]: treesize reduction 5, result has 58.3 percent of original size 7 [2021-02-21 21:12:48,403 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,404 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:12:48,416 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,417 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:48,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:12:48,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:12:48,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,511 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:12:48,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:12:48,527 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:12:48,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:12:48,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:12:48,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-21 21:12:48,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:12:48,540 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,541 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:12:48,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:12:48,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:12:48,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:12:48,546 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,547 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:12:48,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 138 [2021-02-21 21:12:48,559 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:12:48,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,566 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-02-21 21:12:48,569 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 138 [2021-02-21 21:12:48,681 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-02-21 21:12:48,685 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,687 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-02-21 21:12:48,719 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-02-21 21:12:48,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,759 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-02-21 21:12:48,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 62 [2021-02-21 21:12:48,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 65 [2021-02-21 21:12:48,882 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,884 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 66 [2021-02-21 21:12:48,929 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,931 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 70 [2021-02-21 21:12:48,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:48,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 73 [2021-02-21 21:12:49,040 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,042 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-02-21 21:12:49,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,098 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 78 [2021-02-21 21:12:49,161 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 81 [2021-02-21 21:12:49,231 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,234 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 82 [2021-02-21 21:12:49,300 WARN L141 QuantifierPusher]: treesize reduction 45, result has 44.4 percent of original size [2021-02-21 21:12:49,301 WARN L147 QuantifierPusher]: treesize reduction 45, result has 44.4 percent of original size 36 [2021-02-21 21:12:49,345 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,347 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 44 [2021-02-21 21:12:49,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-02-21 21:12:49,470 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-21 21:12:49,473 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,474 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-21 21:12:49,476 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-02-21 21:12:49,514 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-21 21:12:49,572 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,574 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-02-21 21:12:49,576 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,577 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-21 21:12:49,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,624 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 42 [2021-02-21 21:12:49,673 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:49,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-02-21 21:12:49,738 WARN L141 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size [2021-02-21 21:12:49,739 WARN L147 QuantifierPusher]: treesize reduction 10, result has 9.1 percent of original size 1 [2021-02-21 21:12:49,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072976756] [2021-02-21 21:12:49,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:12:49,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-02-21 21:12:49,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145931] [2021-02-21 21:12:49,741 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-21 21:12:49,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:12:49,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-21 21:12:49,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2021-02-21 21:12:49,743 INFO L87 Difference]: Start difference. First operand 186 states and 216 transitions. Second operand 25 states. [2021-02-21 21:12:50,072 WARN L202 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2021-02-21 21:12:50,224 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 58 [2021-02-21 21:12:50,377 WARN L202 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-02-21 21:12:50,530 WARN L202 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 64 [2021-02-21 21:12:50,671 WARN L202 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 62 [2021-02-21 21:12:50,823 WARN L202 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2021-02-21 21:12:51,008 WARN L202 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 68 [2021-02-21 21:12:51,179 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 66 [2021-02-21 21:12:51,339 WARN L202 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 70 [2021-02-21 21:12:51,515 WARN L202 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-02-21 21:12:52,166 WARN L202 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-02-21 21:12:52,426 WARN L202 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-02-21 21:12:52,655 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-02-21 21:12:52,840 WARN L202 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-02-21 21:12:53,055 WARN L202 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-02-21 21:12:53,269 WARN L202 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2021-02-21 21:12:53,511 WARN L202 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-02-21 21:12:53,690 WARN L202 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-02-21 21:12:53,900 WARN L202 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 72 [2021-02-21 21:12:54,102 WARN L202 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2021-02-21 21:12:54,324 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-02-21 21:12:54,551 WARN L202 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 74 [2021-02-21 21:12:54,793 WARN L202 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2021-02-21 21:12:55,006 WARN L202 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-02-21 21:12:55,207 WARN L202 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 81 [2021-02-21 21:12:55,427 WARN L202 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 79 [2021-02-21 21:12:56,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:12:56,507 INFO L93 Difference]: Finished difference Result 404 states and 474 transitions. [2021-02-21 21:12:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-21 21:12:56,508 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 66 [2021-02-21 21:12:56,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:12:56,510 INFO L225 Difference]: With dead ends: 404 [2021-02-21 21:12:56,511 INFO L226 Difference]: Without dead ends: 241 [2021-02-21 21:12:56,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=746, Invalid=2914, Unknown=0, NotChecked=0, Total=3660 [2021-02-21 21:12:56,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-02-21 21:12:56,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 225. [2021-02-21 21:12:56,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2021-02-21 21:12:56,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 259 transitions. [2021-02-21 21:12:56,594 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 259 transitions. Word has length 66 [2021-02-21 21:12:56,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:12:56,595 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 259 transitions. [2021-02-21 21:12:56,595 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-02-21 21:12:56,595 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 259 transitions. [2021-02-21 21:12:56,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-02-21 21:12:56,597 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:12:56,598 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] [2021-02-21 21:12:56,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:12:56,598 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:12:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:12:56,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1806423234, now seen corresponding path program 1 times [2021-02-21 21:12:56,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:12:56,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1124432413] [2021-02-21 21:12:56,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:12:56,664 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:56,669 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 133 [2021-02-21 21:12:56,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:12:56,729 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 137 [2021-02-21 21:12:56,730 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-21 21:12:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:12:56,775 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:12:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:12:56,851 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:12:56,926 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 21:12:56,926 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 21:12:56,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:12:56,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:12:56 BoogieIcfgContainer [2021-02-21 21:12:56,957 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:12:56,963 INFO L168 Benchmark]: Toolchain (without parser) took 12180.87 ms. Allocated memory was 170.9 MB in the beginning and 298.8 MB in the end (delta: 127.9 MB). Free memory was 146.5 MB in the beginning and 235.7 MB in the end (delta: -89.2 MB). Peak memory consumption was 40.3 MB. Max. memory is 8.0 GB. [2021-02-21 21:12:56,964 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 170.9 MB. Free memory is still 146.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:12:56,964 INFO L168 Benchmark]: CACSL2BoogieTranslator took 463.88 ms. Allocated memory is still 170.9 MB. Free memory was 145.5 MB in the beginning and 133.5 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-02-21 21:12:56,967 INFO L168 Benchmark]: Boogie Preprocessor took 52.82 ms. Allocated memory is still 170.9 MB. Free memory was 133.5 MB in the beginning and 131.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:12:56,974 INFO L168 Benchmark]: RCFGBuilder took 746.20 ms. Allocated memory is still 170.9 MB. Free memory was 131.9 MB in the beginning and 93.1 MB in the end (delta: 38.9 MB). Peak memory consumption was 38.8 MB. Max. memory is 8.0 GB. [2021-02-21 21:12:56,975 INFO L168 Benchmark]: TraceAbstraction took 10890.37 ms. Allocated memory was 170.9 MB in the beginning and 298.8 MB in the end (delta: 127.9 MB). Free memory was 92.6 MB in the beginning and 235.7 MB in the end (delta: -143.1 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:12:56,983 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 170.9 MB. Free memory is still 146.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 463.88 ms. Allocated memory is still 170.9 MB. Free memory was 145.5 MB in the beginning and 133.5 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 52.82 ms. Allocated memory is still 170.9 MB. Free memory was 133.5 MB in the beginning and 131.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 746.20 ms. Allocated memory is still 170.9 MB. Free memory was 131.9 MB in the beginning and 93.1 MB in the end (delta: 38.9 MB). Peak memory consumption was 38.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 10890.37 ms. Allocated memory was 170.9 MB in the beginning and 298.8 MB in the end (delta: 127.9 MB). Free memory was 92.6 MB in the beginning and 235.7 MB in the end (delta: -143.1 MB). There was no memory consumed. 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: 10.7s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 7.8s, 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, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1055 ImplicationChecksByTransitivity, 6.4s 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: 0.2s 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...