/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/recursive/BallRajamani-SPIN2000-Fig1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 03:56:49,891 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 03:56:49,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 03:56:49,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 03:56:49,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 03:56:49,963 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 03:56:49,964 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 03:56:49,965 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 03:56:49,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 03:56:49,982 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 03:56:49,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 03:56:49,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 03:56:49,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 03:56:49,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 03:56:49,998 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 03:56:49,999 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 03:56:50,003 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 03:56:50,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 03:56:50,016 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 03:56:50,017 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 03:56:50,018 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 03:56:50,043 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 03:56:50,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 03:56:50,048 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 03:56:50,048 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 03:56:50,048 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 03:56:50,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 03:56:50,049 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 03:56:50,049 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 03:56:50,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 03:56:50,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 03:56:50,051 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 03:56:50,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 03:56:50,051 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 03:56:50,051 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 03:56:50,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 03:56:50,052 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 03:56:50,052 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 03:56:50,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 03:56:50,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 03:56:50,053 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 03:56:50,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 03:56:50,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 03:56:50,053 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 03:56:50,054 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 03:56:50,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 03:56:50,528 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 03:56:50,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 03:56:50,533 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 03:56:50,533 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 03:56:50,534 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2021-02-24 03:56:50,617 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8468beff8/06266a2e59e94a769830adf0648760a0/FLAG54813e110 [2021-02-24 03:56:51,220 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 03:56:51,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c [2021-02-24 03:56:51,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8468beff8/06266a2e59e94a769830adf0648760a0/FLAG54813e110 [2021-02-24 03:56:51,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8468beff8/06266a2e59e94a769830adf0648760a0 [2021-02-24 03:56:51,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 03:56:51,601 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 03:56:51,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 03:56:51,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 03:56:51,612 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 03:56:51,613 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:56:51" (1/1) ... [2021-02-24 03:56:51,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ba76cc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:51, skipping insertion in model container [2021-02-24 03:56:51,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:56:51" (1/1) ... [2021-02-24 03:56:51,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 03:56:51,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 03:56:51,861 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c[718,731] [2021-02-24 03:56:51,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 03:56:51,888 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 03:56:51,905 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursive/BallRajamani-SPIN2000-Fig1.c[718,731] [2021-02-24 03:56:51,906 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 03:56:51,923 INFO L208 MainTranslator]: Completed translation [2021-02-24 03:56:51,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:51 WrapperNode [2021-02-24 03:56:51,924 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 03:56:51,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 03:56:51,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 03:56:51,925 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 03:56:51,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:51" (1/1) ... [2021-02-24 03:56:51,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:51" (1/1) ... [2021-02-24 03:56:51,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:51" (1/1) ... [2021-02-24 03:56:51,948 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:51" (1/1) ... [2021-02-24 03:56:51,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:51" (1/1) ... [2021-02-24 03:56:51,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:51" (1/1) ... [2021-02-24 03:56:51,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:51" (1/1) ... [2021-02-24 03:56:51,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 03:56:51,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 03:56:51,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 03:56:51,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 03:56:51,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:51" (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 [2021-02-24 03:56:52,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 03:56:52,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 03:56:52,071 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 03:56:52,071 INFO L138 BoogieDeclarations]: Found implementation of procedure A [2021-02-24 03:56:52,071 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 03:56:52,071 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 03:56:52,071 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 03:56:52,072 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 03:56:52,072 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 03:56:52,073 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 03:56:52,073 INFO L130 BoogieDeclarations]: Found specification of procedure A [2021-02-24 03:56:52,073 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 03:56:52,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 03:56:52,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 03:56:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 03:56:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 03:56:52,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 03:56:52,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 03:56:52,384 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 03:56:52,384 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-24 03:56:52,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:56:52 BoogieIcfgContainer [2021-02-24 03:56:52,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 03:56:52,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 03:56:52,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 03:56:52,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 03:56:52,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:56:51" (1/3) ... [2021-02-24 03:56:52,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a7f765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:56:52, skipping insertion in model container [2021-02-24 03:56:52,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:56:51" (2/3) ... [2021-02-24 03:56:52,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73a7f765 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:56:52, skipping insertion in model container [2021-02-24 03:56:52,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:56:52" (3/3) ... [2021-02-24 03:56:52,429 INFO L111 eAbstractionObserver]: Analyzing ICFG BallRajamani-SPIN2000-Fig1.c [2021-02-24 03:56:52,453 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 03:56:52,463 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 03:56:52,489 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 03:56:52,519 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 03:56:52,520 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 03:56:52,520 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 03:56:52,520 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 03:56:52,520 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 03:56:52,520 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 03:56:52,521 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 03:56:52,521 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 03:56:52,540 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2021-02-24 03:56:52,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-24 03:56:52,552 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 03:56:52,553 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 03:56:52,554 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 03:56:52,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 03:56:52,561 INFO L82 PathProgramCache]: Analyzing trace with hash -278226396, now seen corresponding path program 1 times [2021-02-24 03:56:52,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 03:56:52,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [734621052] [2021-02-24 03:56:52,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 03:56:52,702 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 03:56:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:52,931 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:52,934 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:52,952 WARN L141 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size [2021-02-24 03:56:52,954 WARN L147 QuantifierPusher]: treesize reduction 9, result has 50.0 percent of original size 9 [2021-02-24 03:56:52,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:53,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:53,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 03:56:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:53,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:53,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:53,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-02-24 03:56:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:53,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:53,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 03:56:53,136 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:53,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 03:56:53,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-24 03:56:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 03:56:53,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 03:56:53,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 03:56:53,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-24 03:56:53,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [734621052] [2021-02-24 03:56:53,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 03:56:53,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-24 03:56:53,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637433403] [2021-02-24 03:56:53,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 03:56:53,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 03:56:53,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 03:56:53,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-24 03:56:53,201 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 7 states. [2021-02-24 03:56:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 03:56:53,558 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2021-02-24 03:56:53,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 03:56:53,560 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 37 [2021-02-24 03:56:53,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 03:56:53,570 INFO L225 Difference]: With dead ends: 69 [2021-02-24 03:56:53,570 INFO L226 Difference]: Without dead ends: 37 [2021-02-24 03:56:53,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-24 03:56:53,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-24 03:56:53,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-02-24 03:56:53,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-02-24 03:56:53,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-02-24 03:56:53,629 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 37 [2021-02-24 03:56:53,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 03:56:53,630 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-02-24 03:56:53,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 03:56:53,631 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-02-24 03:56:53,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-24 03:56:53,634 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 03:56:53,634 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-02-24 03:56:53,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 03:56:53,635 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 03:56:53,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 03:56:53,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1413678012, now seen corresponding path program 1 times [2021-02-24 03:56:53,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 03:56:53,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096101546] [2021-02-24 03:56:53,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 03:56:53,640 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 03:56:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 03:56:53,677 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 03:56:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 03:56:53,710 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 03:56:53,754 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 03:56:53,754 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 03:56:53,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 03:56:53,778 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 03:56:53 BoogieIcfgContainer [2021-02-24 03:56:53,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 03:56:53,781 INFO L168 Benchmark]: Toolchain (without parser) took 2190.60 ms. Allocated memory is still 151.0 MB. Free memory was 127.2 MB in the beginning and 117.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. [2021-02-24 03:56:53,784 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 125.2 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 03:56:53,785 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.81 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 117.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 03:56:53,786 INFO L168 Benchmark]: Boogie Preprocessor took 35.37 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 03:56:53,787 INFO L168 Benchmark]: RCFGBuilder took 428.45 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 134.2 MB in the end (delta: -18.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. [2021-02-24 03:56:53,788 INFO L168 Benchmark]: TraceAbstraction took 1383.18 ms. Allocated memory is still 151.0 MB. Free memory was 133.8 MB in the beginning and 117.8 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. [2021-02-24 03:56:53,792 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 125.2 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 317.81 ms. Allocated memory is still 151.0 MB. Free memory was 126.2 MB in the beginning and 117.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.37 ms. Allocated memory is still 151.0 MB. Free memory was 117.0 MB in the beginning and 115.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 428.45 ms. Allocated memory is still 151.0 MB. Free memory was 115.7 MB in the beginning and 134.2 MB in the end (delta: -18.5 MB). Peak memory consumption was 18.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1383.18 ms. Allocated memory is still 151.0 MB. Free memory was 133.8 MB in the beginning and 117.8 MB in the end (delta: 16.0 MB). Peak memory consumption was 16.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 33]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int g; [L28] int g = __VERIFIER_nondet_int(); [L29] int h = !g; [L30] CALL A(g,h) [L19] COND TRUE \read(a1) [L20] CALL A(a2,a1) [L19] COND FALSE !(\read(a1)) [L22] g = a2 [L20] RET A(a2,a1) [L30] RET A(g,h) [L31] CALL A(g,h) [L19] COND TRUE \read(a1) [L20] CALL A(a2,a1) [L19] COND FALSE !(\read(a1)) [L22] g = a2 [L20] RET A(a2,a1) [L31] RET A(g,h) [L32] COND TRUE \read(g) [L33] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 2, TraceHistogramMax: 4, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 27 SDslu, 91 SDs, 0 SdLazy, 83 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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: 0.0s AutomataMinimizationTime, 1 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...