/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/psyco/psyco_io_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 02:16:24,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 02:16:24,827 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 02:16:24,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 02:16:24,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-22 02:16:24,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-22 02:16:24,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-22 02:16:24,915 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 02:16:24,927 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 02:16:24,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 02:16:24,929 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 02:16:24,929 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 02:16:24,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 02:16:24,930 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 02:16:24,930 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 02:16:24,930 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 02:16:24,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 02:16:24,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 02:16:24,931 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 02:16:24,931 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 02:16:24,931 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 02:16:24,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 02:16:24,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 02:16:24,932 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 02:16:24,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 02:16:24,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 02:16:24,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 02:16:24,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 02:16:24,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 02:16:24,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 02:16:24,934 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 02:16:24,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 02:16:25,332 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 02:16:25,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 02:16:25,361 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 02:16:25,362 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 02:16:25,363 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 02:16:25,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/psyco/psyco_io_1.c [2021-02-22 02:16:25,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f53605c6/5f30a53a6e4542d8911f663103f856a2/FLAGec52ef406 [2021-02-22 02:16:26,109 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 02:16:26,111 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/psyco/psyco_io_1.c [2021-02-22 02:16:26,125 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f53605c6/5f30a53a6e4542d8911f663103f856a2/FLAGec52ef406 [2021-02-22 02:16:26,410 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5f53605c6/5f30a53a6e4542d8911f663103f856a2 [2021-02-22 02:16:26,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 02:16:26,427 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 02:16:26,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 02:16:26,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 02:16:26,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 02:16:26,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:16:26" (1/1) ... [2021-02-22 02:16:26,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e36e29a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:16:26, skipping insertion in model container [2021-02-22 02:16:26,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 02:16:26" (1/1) ... [2021-02-22 02:16:26,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 02:16:26,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 02:16:26,652 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] [2021-02-22 02:16:26,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:16:26,669 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 02:16:26,704 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] [2021-02-22 02:16:26,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 02:16:26,721 INFO L208 MainTranslator]: Completed translation [2021-02-22 02:16:26,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:16:26 WrapperNode [2021-02-22 02:16:26,722 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 02:16:26,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 02:16:26,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 02:16:26,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 02:16:26,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:16:26" (1/1) ... [2021-02-22 02:16:26,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:16:26" (1/1) ... [2021-02-22 02:16:26,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:16:26" (1/1) ... [2021-02-22 02:16:26,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:16:26" (1/1) ... [2021-02-22 02:16:26,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:16:26" (1/1) ... [2021-02-22 02:16:26,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:16:26" (1/1) ... [2021-02-22 02:16:26,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:16:26" (1/1) ... [2021-02-22 02:16:26,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 02:16:26,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 02:16:26,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 02:16:26,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 02:16:26,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:16:26" (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 [2021-02-22 02:16:26,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 02:16:26,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 02:16:26,888 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 02:16:26,888 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 02:16:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-22 02:16:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 02:16:26,888 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 02:16:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 02:16:26,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 02:16:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 02:16:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 02:16:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 02:16:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 02:16:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 02:16:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 02:16:26,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 02:16:27,467 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 02:16:27,468 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-02-22 02:16:27,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:16:27 BoogieIcfgContainer [2021-02-22 02:16:27,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 02:16:27,472 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 02:16:27,472 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 02:16:27,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 02:16:27,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 02:16:26" (1/3) ... [2021-02-22 02:16:27,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fe43f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:16:27, skipping insertion in model container [2021-02-22 02:16:27,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 02:16:26" (2/3) ... [2021-02-22 02:16:27,477 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58fe43f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 02:16:27, skipping insertion in model container [2021-02-22 02:16:27,477 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 02:16:27" (3/3) ... [2021-02-22 02:16:27,479 INFO L111 eAbstractionObserver]: Analyzing ICFG psyco_io_1.c [2021-02-22 02:16:27,486 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 02:16:27,490 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 02:16:27,512 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 02:16:27,536 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 02:16:27,536 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 02:16:27,536 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 02:16:27,536 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 02:16:27,536 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 02:16:27,537 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 02:16:27,537 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 02:16:27,537 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 02:16:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states. [2021-02-22 02:16:27,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-22 02:16:27,573 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:16:27,577 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] [2021-02-22 02:16:27,577 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:16:27,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:16:27,584 INFO L82 PathProgramCache]: Analyzing trace with hash 897627995, now seen corresponding path program 1 times [2021-02-22 02:16:27,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:16:27,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1166000788] [2021-02-22 02:16:27,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:16:27,670 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:16:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:16:27,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:16:27,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:16:27,820 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:16:27,821 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:16:27,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:16:27,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:16:27,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:16:27,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:16:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:16:27,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1166000788] [2021-02-22 02:16:27,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:16:27,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-22 02:16:27,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828940448] [2021-02-22 02:16:28,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-22 02:16:28,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:16:28,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-22 02:16:28,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-22 02:16:28,028 INFO L87 Difference]: Start difference. First operand 210 states. Second operand 3 states. [2021-02-22 02:16:28,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:16:28,309 INFO L93 Difference]: Finished difference Result 377 states and 491 transitions. [2021-02-22 02:16:28,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-22 02:16:28,311 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2021-02-22 02:16:28,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:16:28,331 INFO L225 Difference]: With dead ends: 377 [2021-02-22 02:16:28,331 INFO L226 Difference]: Without dead ends: 171 [2021-02-22 02:16:28,339 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 [2021-02-22 02:16:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2021-02-22 02:16:28,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2021-02-22 02:16:28,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2021-02-22 02:16:28,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 201 transitions. [2021-02-22 02:16:28,483 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 201 transitions. Word has length 43 [2021-02-22 02:16:28,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:16:28,486 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 201 transitions. [2021-02-22 02:16:28,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-22 02:16:28,486 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 201 transitions. [2021-02-22 02:16:28,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-22 02:16:28,489 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:16:28,490 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] [2021-02-22 02:16:28,490 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 02:16:28,490 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:16:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:16:28,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1048430808, now seen corresponding path program 1 times [2021-02-22 02:16:28,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:16:28,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465676064] [2021-02-22 02:16:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:16:28,503 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 02:16:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:16:28,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:16:28,634 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:16:28,634 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:16:28,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 02:16:28,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:16:28,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:16:28,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 02:16:28,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 02:16:28,726 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:16:28,731 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 02:16:28,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 02:16:28,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465676064] [2021-02-22 02:16:28,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 02:16:28,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-22 02:16:28,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280778168] [2021-02-22 02:16:28,739 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-22 02:16:28,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 02:16:28,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-22 02:16:28,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-22 02:16:28,740 INFO L87 Difference]: Start difference. First operand 171 states and 201 transitions. Second operand 4 states. [2021-02-22 02:16:29,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 02:16:29,194 INFO L93 Difference]: Finished difference Result 335 states and 396 transitions. [2021-02-22 02:16:29,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-22 02:16:29,195 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2021-02-22 02:16:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 02:16:29,197 INFO L225 Difference]: With dead ends: 335 [2021-02-22 02:16:29,198 INFO L226 Difference]: Without dead ends: 186 [2021-02-22 02:16:29,200 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 [2021-02-22 02:16:29,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-02-22 02:16:29,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2021-02-22 02:16:29,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2021-02-22 02:16:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 216 transitions. [2021-02-22 02:16:29,244 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 216 transitions. Word has length 44 [2021-02-22 02:16:29,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 02:16:29,245 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 216 transitions. [2021-02-22 02:16:29,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-22 02:16:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 216 transitions. [2021-02-22 02:16:29,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-02-22 02:16:29,247 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 02:16:29,248 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] [2021-02-22 02:16:29,248 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 02:16:29,248 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 02:16:29,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 02:16:29,249 INFO L82 PathProgramCache]: Analyzing trace with hash -102069769, now seen corresponding path program 1 times [2021-02-22 02:16:29,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 02:16:29,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024728580] [2021-02-22 02:16:29,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 02:16:29,284 WARN L141 QuantifierPusher]: treesize reduction 3, result has 95.8 percent of original size [2021-02-22 02:16:29,305 WARN L147 QuantifierPusher]: treesize reduction 3, result has 95.8 percent of original size 69 [2021-02-22 02:16:29,315 WARN L141 QuantifierPusher]: treesize reduction 3, result has 95.8 percent of original size [2021-02-22 02:16:29,323 WARN L147 QuantifierPusher]: treesize reduction 3, result has 95.8 percent of original size 69 [2021-02-22 02:16:29,348 WARN L141 QuantifierPusher]: treesize reduction 36, result has 18.2 percent of original size [2021-02-22 02:16:29,362 WARN L147 QuantifierPusher]: treesize reduction 36, result has 18.2 percent of original size 8 [2021-02-22 02:16:29,367 WARN L141 QuantifierPusher]: treesize reduction 12, result has 81.3 percent of original size [2021-02-22 02:16:29,370 WARN L147 QuantifierPusher]: treesize reduction 12, result has 81.3 percent of original size 52 [2021-02-22 02:16:29,376 WARN L141 QuantifierPusher]: treesize reduction 5, result has 93.1 percent of original size [2021-02-22 02:16:29,382 WARN L147 QuantifierPusher]: treesize reduction 5, result has 93.1 percent of original size 67 [2021-02-22 02:16:29,386 WARN L141 QuantifierPusher]: treesize reduction 5, result has 93.1 percent of original size [2021-02-22 02:16:29,392 WARN L147 QuantifierPusher]: treesize reduction 5, result has 93.1 percent of original size 67 [2021-02-22 02:16:29,414 WARN L141 QuantifierPusher]: treesize reduction 2, result has 95.5 percent of original size [2021-02-22 02:16:29,417 WARN L147 QuantifierPusher]: treesize reduction 2, result has 95.5 percent of original size 42 [2021-02-22 02:16:29,423 WARN L141 QuantifierPusher]: treesize reduction 12, result has 88.2 percent of original size [2021-02-22 02:16:29,428 INFO L723 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-02-22 02:16:29,433 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:16:29,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-22 02:16:29,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 02:16:29,438 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 47 [2021-02-22 02:16:29,442 WARN L147 QuantifierPusher]: treesize reduction 12, result has 88.2 percent of original size 90 [2021-02-22 02:16:29,442 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-02-22 02:16:29,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:16:29,492 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:16:29,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 02:16:29,535 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 02:16:29,583 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 02:16:29,583 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 02:16:29,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-22 02:16:29,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 02:16:29 BoogieIcfgContainer [2021-02-22 02:16:29,611 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 02:16:29,614 INFO L168 Benchmark]: Toolchain (without parser) took 3196.47 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.1 MB in the beginning and 79.8 MB in the end (delta: 47.3 MB). Peak memory consumption was 78.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:16:29,615 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 151.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 02:16:29,617 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.51 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 114.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-02-22 02:16:29,618 INFO L168 Benchmark]: Boogie Preprocessor took 47.73 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 112.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:16:29,623 INFO L168 Benchmark]: RCFGBuilder took 698.48 ms. Allocated memory is still 151.0 MB. Free memory was 112.3 MB in the beginning and 109.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. [2021-02-22 02:16:29,624 INFO L168 Benchmark]: TraceAbstraction took 2138.91 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 108.5 MB in the beginning and 79.8 MB in the end (delta: 28.7 MB). Peak memory consumption was 60.1 MB. Max. memory is 8.0 GB. [2021-02-22 02:16:29,634 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 151.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 293.51 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 114.4 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 47.73 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 112.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 698.48 ms. Allocated memory is still 151.0 MB. Free memory was 112.3 MB in the beginning and 109.0 MB in the end (delta: 3.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2138.91 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 108.5 MB in the beginning and 79.8 MB in the end (delta: 28.7 MB). Peak memory consumption was 60.1 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 TRUE q == 1 [L56] COND TRUE __VERIFIER_nondet_int() [L60] method_id = 4 [L62] 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: 2.0s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 425 SDtfs, 411 SDslu, 25 SDs, 0 SdLazy, 199 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=210occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 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...