/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/ldv-regression/test22-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:39:01,158 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:39:01,161 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:39:01,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:39:01,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:39:01,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:39:01,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:39:01,204 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:39:01,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:39:01,219 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:39:01,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:39:01,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:39:01,223 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:39:01,224 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:39:01,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:39:01,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:39:01,227 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:39:01,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:39:01,245 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:39:01,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:39:01,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:39:01,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:39:01,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:39:01,269 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:39:01,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:39:01,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:39:01,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:39:01,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:39:01,300 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 20:39:01,322 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:39:01,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:39:01,327 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:39:01,328 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:39:01,328 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:39:01,328 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:39:01,328 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:39:01,328 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:39:01,328 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:39:01,329 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:39:01,330 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:39:01,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:39:01,330 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:39:01,330 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:39:01,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:39:01,331 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:39:01,331 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:39:01,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:39:01,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:39:01,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:39:01,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:39:01,332 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:39:01,332 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:39:01,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:39:01,842 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:39:01,846 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:39:01,847 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:39:01,848 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:39:01,849 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test22-2.c [2021-02-21 20:39:01,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/066073a2f/9262391ea4424d82b0107f4d4a435e2b/FLAG320b67bf6 [2021-02-21 20:39:02,625 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:39:02,626 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test22-2.c [2021-02-21 20:39:02,635 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/066073a2f/9262391ea4424d82b0107f4d4a435e2b/FLAG320b67bf6 [2021-02-21 20:39:02,974 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/066073a2f/9262391ea4424d82b0107f4d4a435e2b [2021-02-21 20:39:02,984 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:39:02,999 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:39:03,007 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:39:03,007 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:39:03,012 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:39:03,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:39:02" (1/1) ... [2021-02-21 20:39:03,016 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c95dcd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:03, skipping insertion in model container [2021-02-21 20:39:03,016 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:39:02" (1/1) ... [2021-02-21 20:39:03,027 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:39:03,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:39:03,247 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test22-2.c[1029,1042] [2021-02-21 20:39:03,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:39:03,263 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:39:03,286 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test22-2.c[1029,1042] [2021-02-21 20:39:03,287 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:39:03,306 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:39:03,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:03 WrapperNode [2021-02-21 20:39:03,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:39:03,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:39:03,309 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:39:03,309 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:39:03,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:03" (1/1) ... [2021-02-21 20:39:03,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:03" (1/1) ... [2021-02-21 20:39:03,336 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:03" (1/1) ... [2021-02-21 20:39:03,336 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:03" (1/1) ... [2021-02-21 20:39:03,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:03" (1/1) ... [2021-02-21 20:39:03,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:03" (1/1) ... [2021-02-21 20:39:03,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:03" (1/1) ... [2021-02-21 20:39:03,367 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:39:03,368 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:39:03,368 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:39:03,368 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:39:03,381 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:03" (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 20:39:03,517 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:39:03,518 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:39:03,518 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:39:03,518 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2021-02-21 20:39:03,518 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2021-02-21 20:39:03,519 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-02-21 20:39:03,519 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:39:03,519 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:39:03,519 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:39:03,520 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:39:03,520 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:39:03,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 20:39:03,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-21 20:39:03,520 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-21 20:39:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:39:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2021-02-21 20:39:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-21 20:39:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:39:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:39:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:39:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:39:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:39:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:39:04,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:39:04,032 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 20:39:04,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:39:04 BoogieIcfgContainer [2021-02-21 20:39:04,037 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:39:04,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:39:04,041 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:39:04,046 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:39:04,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:39:02" (1/3) ... [2021-02-21 20:39:04,048 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2171517e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:39:04, skipping insertion in model container [2021-02-21 20:39:04,048 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:39:03" (2/3) ... [2021-02-21 20:39:04,049 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2171517e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:39:04, skipping insertion in model container [2021-02-21 20:39:04,050 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:39:04" (3/3) ... [2021-02-21 20:39:04,053 INFO L111 eAbstractionObserver]: Analyzing ICFG test22-2.c [2021-02-21 20:39:04,061 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:39:04,067 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:39:04,088 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:39:04,130 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:39:04,130 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:39:04,131 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:39:04,131 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:39:04,131 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:39:04,131 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:39:04,131 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:39:04,132 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:39:04,159 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states. [2021-02-21 20:39:04,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-02-21 20:39:04,177 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:39:04,179 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:39:04,180 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:39:04,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:39:04,193 INFO L82 PathProgramCache]: Analyzing trace with hash -895331749, now seen corresponding path program 1 times [2021-02-21 20:39:04,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:39:04,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844218239] [2021-02-21 20:39:04,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:39:04,309 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:39:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:04,541 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:04,544 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:04,545 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:04,546 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:04,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:39:04,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:04,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:04,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:04,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-02-21 20:39:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:04,723 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:04,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:04,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-02-21 20:39:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:04,732 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:04,733 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:04,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-21 20:39:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:04,740 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:04,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:04,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-02-21 20:39:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:04,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:04,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:04,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-02-21 20:39:04,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:04,760 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:04,760 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-02-21 20:39:04,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844218239] [2021-02-21 20:39:04,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:39:04,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:39:04,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56677629] [2021-02-21 20:39:04,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:39:04,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:39:04,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:39:04,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:39:04,836 INFO L87 Difference]: Start difference. First operand 94 states. Second operand 4 states. [2021-02-21 20:39:05,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:39:05,296 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2021-02-21 20:39:05,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 20:39:05,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 88 [2021-02-21 20:39:05,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:39:05,310 INFO L225 Difference]: With dead ends: 113 [2021-02-21 20:39:05,310 INFO L226 Difference]: Without dead ends: 84 [2021-02-21 20:39:05,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:39:05,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-02-21 20:39:05,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-02-21 20:39:05,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-02-21 20:39:05,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-02-21 20:39:05,392 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 88 [2021-02-21 20:39:05,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:39:05,394 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-02-21 20:39:05,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:39:05,394 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-02-21 20:39:05,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-02-21 20:39:05,399 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:39:05,399 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:39:05,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:39:05,400 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:39:05,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:39:05,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1230444656, now seen corresponding path program 1 times [2021-02-21 20:39:05,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:39:05,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518244980] [2021-02-21 20:39:05,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:39:05,405 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:39:05,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:05,511 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:05,512 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:05,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:05,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 20:39:05,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:05,517 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:05,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:39:05,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:05,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:05,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:05,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-02-21 20:39:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:05,578 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:05,579 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:05,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-02-21 20:39:05,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:05,584 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:05,584 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:05,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-21 20:39:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:05,589 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:05,590 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:05,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-02-21 20:39:05,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:05,595 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:05,595 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:05,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-02-21 20:39:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:05,601 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:05,602 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-02-21 20:39:05,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518244980] [2021-02-21 20:39:05,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:39:05,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 20:39:05,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472482393] [2021-02-21 20:39:05,614 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 20:39:05,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:39:05,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 20:39:05,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:39:05,616 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 5 states. [2021-02-21 20:39:06,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:39:06,009 INFO L93 Difference]: Finished difference Result 111 states and 115 transitions. [2021-02-21 20:39:06,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-21 20:39:06,010 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 90 [2021-02-21 20:39:06,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:39:06,012 INFO L225 Difference]: With dead ends: 111 [2021-02-21 20:39:06,012 INFO L226 Difference]: Without dead ends: 84 [2021-02-21 20:39:06,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-02-21 20:39:06,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-02-21 20:39:06,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-02-21 20:39:06,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2021-02-21 20:39:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2021-02-21 20:39:06,039 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 90 [2021-02-21 20:39:06,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:39:06,040 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2021-02-21 20:39:06,040 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 20:39:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2021-02-21 20:39:06,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-02-21 20:39:06,042 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:39:06,043 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:39:06,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:39:06,043 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:39:06,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:39:06,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1239221587, now seen corresponding path program 1 times [2021-02-21 20:39:06,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:39:06,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867483451] [2021-02-21 20:39:06,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:39:06,048 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:39:06,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:06,151 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,152 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:06,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:39:06,171 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,172 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:39:06,186 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,188 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:39:06,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:39:06,206 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,207 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-21 20:39:06,223 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:39:06,235 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,236 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 20:39:06,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,251 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-21 20:39:06,263 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,264 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:06,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:39:06,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:06,321 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,322 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:06,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-02-21 20:39:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:06,349 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,350 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:06,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-02-21 20:39:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:06,358 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,359 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:06,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,360 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:39:06,377 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,378 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:39:06,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-02-21 20:39:06,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:06,402 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,402 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:06,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-02-21 20:39:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:06,410 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,411 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:06,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:39:06,415 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,415 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 20:39:06,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-02-21 20:39:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:39:06,421 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:39:06,422 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:39:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-02-21 20:39:06,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867483451] [2021-02-21 20:39:06,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:39:06,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-02-21 20:39:06,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183478324] [2021-02-21 20:39:06,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-21 20:39:06,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:39:06,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-21 20:39:06,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2021-02-21 20:39:06,446 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 14 states. [2021-02-21 20:39:08,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:39:08,331 INFO L93 Difference]: Finished difference Result 172 states and 183 transitions. [2021-02-21 20:39:08,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-02-21 20:39:08,331 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 92 [2021-02-21 20:39:08,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:39:08,336 INFO L225 Difference]: With dead ends: 172 [2021-02-21 20:39:08,336 INFO L226 Difference]: Without dead ends: 158 [2021-02-21 20:39:08,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-02-21 20:39:08,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-02-21 20:39:08,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 113. [2021-02-21 20:39:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-02-21 20:39:08,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 122 transitions. [2021-02-21 20:39:08,381 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 122 transitions. Word has length 92 [2021-02-21 20:39:08,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:39:08,381 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 122 transitions. [2021-02-21 20:39:08,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-02-21 20:39:08,382 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 122 transitions. [2021-02-21 20:39:08,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-02-21 20:39:08,384 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:39:08,385 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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, 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 20:39:08,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:39:08,385 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:39:08,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:39:08,386 INFO L82 PathProgramCache]: Analyzing trace with hash 353520397, now seen corresponding path program 1 times [2021-02-21 20:39:08,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:39:08,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190106474] [2021-02-21 20:39:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:39:08,389 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:39:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:39:08,426 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:39:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:39:08,456 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:39:08,497 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:39:08,497 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:39:08,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:39:08,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:39:08 BoogieIcfgContainer [2021-02-21 20:39:08,519 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:39:08,521 INFO L168 Benchmark]: Toolchain (without parser) took 5533.66 ms. Allocated memory was 173.0 MB in the beginning and 249.6 MB in the end (delta: 76.5 MB). Free memory was 129.6 MB in the beginning and 179.9 MB in the end (delta: -50.2 MB). Peak memory consumption was 26.8 MB. Max. memory is 8.0 GB. [2021-02-21 20:39:08,521 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 173.0 MB. Free memory is still 145.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:39:08,522 INFO L168 Benchmark]: CACSL2BoogieTranslator took 301.20 ms. Allocated memory is still 173.0 MB. Free memory was 128.5 MB in the beginning and 150.9 MB in the end (delta: -22.4 MB). Peak memory consumption was 8.1 MB. Max. memory is 8.0 GB. [2021-02-21 20:39:08,523 INFO L168 Benchmark]: Boogie Preprocessor took 58.23 ms. Allocated memory is still 173.0 MB. Free memory was 150.9 MB in the beginning and 149.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:39:08,524 INFO L168 Benchmark]: RCFGBuilder took 669.42 ms. Allocated memory is still 173.0 MB. Free memory was 149.2 MB in the beginning and 134.2 MB in the end (delta: 15.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-21 20:39:08,525 INFO L168 Benchmark]: TraceAbstraction took 4479.57 ms. Allocated memory was 173.0 MB in the beginning and 249.6 MB in the end (delta: 76.5 MB). Free memory was 133.4 MB in the beginning and 179.9 MB in the end (delta: -46.5 MB). Peak memory consumption was 30.9 MB. Max. memory is 8.0 GB. [2021-02-21 20:39:08,528 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 173.0 MB. Free memory is still 145.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 301.20 ms. Allocated memory is still 173.0 MB. Free memory was 128.5 MB in the beginning and 150.9 MB in the end (delta: -22.4 MB). Peak memory consumption was 8.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 58.23 ms. Allocated memory is still 173.0 MB. Free memory was 150.9 MB in the beginning and 149.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 669.42 ms. Allocated memory is still 173.0 MB. Free memory was 149.2 MB in the beginning and 134.2 MB in the end (delta: 15.0 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4479.57 ms. Allocated memory was 173.0 MB in the beginning and 249.6 MB in the end (delta: 76.5 MB). Free memory was 133.4 MB in the beginning and 179.9 MB in the end (delta: -46.5 MB). Peak memory consumption was 30.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 50]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L11] struct dummy d1, d2; [L34] CALL init() [L15] d1.a = __VERIFIER_nondet_int() [L16] d1.b = __VERIFIER_nondet_int() [L18] d2.a = __VERIFIER_nondet_int() [L19] d2.b = __VERIFIER_nondet_int() [L34] RET init() [L35] CALL, EXPR get_dummy() [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L35] RET, EXPR get_dummy() [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L35] CALL, EXPR get_dummy() [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L35] RET, EXPR get_dummy() [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L35] CALL, EXPR get_dummy() [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L35] RET, EXPR get_dummy() [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L36] int i = __VERIFIER_nondet_int(); [L37] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L37] EXPR (*pd2).a [L37] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L37] COND TRUE pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L38] int *pa = &pd1->a; [L39] EXPR pd3->a [L39] i = pd3->a - 10 [L40] EXPR \read(*pa) [L40] COND FALSE !(i < *pa) [L43] CALL, EXPR check(pd2, i) [L29] EXPR s1->a [L29] return s1->a == i; [L43] RET, EXPR check(pd2, i) [L43] COND TRUE !check(pd2, i) [L50] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 97 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.3s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 214 SDtfs, 414 SDslu, 76 SDs, 0 SdLazy, 1311 SolverSat, 62 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=113occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 45 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...