/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:11:28,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:11:28,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:11:29,029 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 16:11:29,074 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:11:29,078 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:11:29,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:11:29,084 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:11:29,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:11:29,091 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:11:29,115 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:11:29,121 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:11:29,126 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:11:29,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:11:29,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:11:29,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:11:29,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:11:29,161 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:11:29,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:11:29,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:11:29,165 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-21 16:11:29,209 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:11:29,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:11:29,211 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:11:29,212 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:11:29,212 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:11:29,212 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:11:29,212 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:11:29,213 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:11:29,213 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:11:29,213 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:11:29,213 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:11:29,213 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:11:29,214 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:11:29,214 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:11:29,214 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:11:29,214 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:11:29,214 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:11:29,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:11:29,215 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:11:29,215 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:11:29,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:11:29,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:11:29,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:11:29,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:11:29,216 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:11:29,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:11:29,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:11:29,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:11:29,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:11:29,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:11:29,724 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:11:29,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:11:29,729 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:11:29,730 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:11:29,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2021-02-21 16:11:29,828 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1172071db/e8615eddce514fb88822c58797524c68/FLAG086b46954 [2021-02-21 16:11:30,501 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:11:30,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c [2021-02-21 16:11:30,513 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1172071db/e8615eddce514fb88822c58797524c68/FLAG086b46954 [2021-02-21 16:11:30,834 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1172071db/e8615eddce514fb88822c58797524c68 [2021-02-21 16:11:30,839 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:11:30,855 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:11:30,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:11:30,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:11:30,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:11:30,867 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:11:30" (1/1) ... [2021-02-21 16:11:30,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d92bedf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:30, skipping insertion in model container [2021-02-21 16:11:30,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:11:30" (1/1) ... [2021-02-21 16:11:30,880 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:11:30,904 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:11:31,154 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/test06.c[670,683] [2021-02-21 16:11:31,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:11:31,177 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:11:31,197 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/test06.c[670,683] [2021-02-21 16:11:31,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:11:31,219 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:11:31,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:31 WrapperNode [2021-02-21 16:11:31,220 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:11:31,221 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:11:31,222 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:11:31,222 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:11:31,238 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:31" (1/1) ... [2021-02-21 16:11:31,239 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:31" (1/1) ... [2021-02-21 16:11:31,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:31" (1/1) ... [2021-02-21 16:11:31,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:31" (1/1) ... [2021-02-21 16:11:31,259 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:31" (1/1) ... [2021-02-21 16:11:31,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:31" (1/1) ... [2021-02-21 16:11:31,264 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:31" (1/1) ... [2021-02-21 16:11:31,267 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:11:31,269 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:11:31,269 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:11:31,269 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:11:31,270 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:31" (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 16:11:31,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:11:31,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:11:31,400 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:11:31,400 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2021-02-21 16:11:31,401 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-02-21 16:11:31,402 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:11:31,402 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:11:31,402 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:11:31,403 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:11:31,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:11:31,404 INFO L130 BoogieDeclarations]: Found specification of procedure g [2021-02-21 16:11:31,404 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-21 16:11:31,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-21 16:11:31,405 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:11:31,408 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-02-21 16:11:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:11:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:11:31,409 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:11:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:11:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:11:31,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:11:32,008 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:11:32,009 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:11:32,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:11:32 BoogieIcfgContainer [2021-02-21 16:11:32,011 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:11:32,013 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:11:32,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:11:32,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:11:32,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:11:30" (1/3) ... [2021-02-21 16:11:32,019 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a75219f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:11:32, skipping insertion in model container [2021-02-21 16:11:32,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:31" (2/3) ... [2021-02-21 16:11:32,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a75219f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:11:32, skipping insertion in model container [2021-02-21 16:11:32,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:11:32" (3/3) ... [2021-02-21 16:11:32,022 INFO L111 eAbstractionObserver]: Analyzing ICFG test06.c [2021-02-21 16:11:32,031 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:11:32,037 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:11:32,059 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:11:32,093 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:11:32,093 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:11:32,093 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:11:32,094 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:11:32,094 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:11:32,094 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:11:32,094 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:11:32,094 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:11:32,114 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-02-21 16:11:32,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-21 16:11:32,120 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:11:32,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:11:32,122 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:11:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:11:32,130 INFO L82 PathProgramCache]: Analyzing trace with hash -153708286, now seen corresponding path program 1 times [2021-02-21 16:11:32,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:11:32,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877559899] [2021-02-21 16:11:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:11:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:11:32,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:11:32,460 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:11:32,461 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:11:32,462 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:11:32,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:11:32,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:11:32,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:11:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:11:32,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:11:32,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:11:32,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 16:11:32,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:11:32,567 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:11:32,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:11:32,577 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:11:32,578 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:11:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:11:32,592 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877559899] [2021-02-21 16:11:32,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:11:32,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 16:11:32,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528242877] [2021-02-21 16:11:32,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 16:11:32,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:11:32,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 16:11:32,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-21 16:11:32,632 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 7 states. [2021-02-21 16:11:33,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:11:33,105 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-02-21 16:11:33,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-21 16:11:33,107 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2021-02-21 16:11:33,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:11:33,118 INFO L225 Difference]: With dead ends: 34 [2021-02-21 16:11:33,118 INFO L226 Difference]: Without dead ends: 20 [2021-02-21 16:11:33,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-02-21 16:11:33,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-02-21 16:11:33,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-02-21 16:11:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-02-21 16:11:33,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 19 transitions. [2021-02-21 16:11:33,190 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 19 transitions. Word has length 14 [2021-02-21 16:11:33,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:11:33,190 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 19 transitions. [2021-02-21 16:11:33,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 16:11:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 19 transitions. [2021-02-21 16:11:33,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-21 16:11:33,192 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:11:33,192 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:11:33,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:11:33,193 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:11:33,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:11:33,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1584942154, now seen corresponding path program 1 times [2021-02-21 16:11:33,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:11:33,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90302994] [2021-02-21 16:11:33,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:11:33,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:11:33,366 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:11:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:11:33,519 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:11:33,582 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 16:11:33,582 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 16:11:33,584 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:11:33,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:11:33 BoogieIcfgContainer [2021-02-21 16:11:33,668 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:11:33,671 INFO L168 Benchmark]: Toolchain (without parser) took 2828.89 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 127.3 MB in the beginning and 163.4 MB in the end (delta: -36.0 MB). Peak memory consumption was 79.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:11:33,672 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:11:33,673 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.16 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 116.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:11:33,674 INFO L168 Benchmark]: Boogie Preprocessor took 46.17 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:11:33,675 INFO L168 Benchmark]: RCFGBuilder took 742.67 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 132.0 MB in the end (delta: -17.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:11:33,676 INFO L168 Benchmark]: TraceAbstraction took 1654.85 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 131.4 MB in the beginning and 163.4 MB in the end (delta: -31.9 MB). Peak memory consumption was 82.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:11:33,681 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory is still 123.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 360.16 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 116.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.17 ms. Allocated memory is still 151.0 MB. Free memory was 116.5 MB in the beginning and 115.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 742.67 ms. Allocated memory is still 151.0 MB. Free memory was 114.9 MB in the beginning and 132.0 MB in the end (delta: -17.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1654.85 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 131.4 MB in the beginning and 163.4 MB in the end (delta: -31.9 MB). Peak memory consumption was 82.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 42]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int a, b; [L24] int *p1, *p2; [L26] p1 = &a [L27] p2 = &b [L29] b = 1 [L30] a = 5 [L32] EXPR \read(a) [L32] a-- [L34] EXPR \read(a) VAL [\read(a)=4, a={8:0}, b={3:0}, p1={11:0}, p2={10:0}] [L34] CALL, EXPR f(a, &p1, &p2) VAL [\old(a)=4, p1={11:0}, p2={10:0}] [L14] COND TRUE a == 4 VAL [\old(a)=4, a=4, p1={11:0}, p1={11:0}, p2={10:0}, p2={10:0}] [L15] CALL g(p1, p2) VAL [p1={11:0}, p2={10:0}] [L7] EXPR \read(**p2) [L7] int *pq = *p2; [L9] EXPR \read(**p2) [L9] *p1 = *p2 [L10] *pq = 0 VAL [p1={11:0}, p1={11:0}, p2={10:0}, p2={10:0}, pq={3:0}] [L15] RET g(p1, p2) VAL [\old(a)=4, a=4, p1={11:0}, p1={11:0}, p2={10:0}, p2={10:0}] [L16] return 1; VAL [\old(a)=4, \result=1, a=4, p1={11:0}, p1={11:0}, p2={10:0}, p2={10:0}] [L34] RET, EXPR f(a, &p1, &p2) VAL [\read(a)=4, a={8:0}, b={3:0}, f(a, &p1, &p2)=1, p1={11:0}, p2={10:0}] [L34] a = f(a, &p1, &p2) [L36] EXPR \read(*p1) VAL [\read(*p1)={3:0}, \read(*p1)=0, a={8:0}, b={3:0}, p1={11:0}, p2={10:0}] [L36] COND TRUE *p1 == 0 [L42] reach_error() VAL [a={8:0}, b={3:0}, p1={11:0}, p2={10:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 17 SDtfs, 17 SDslu, 42 SDs, 0 SdLazy, 55 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred 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: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 33 NumberOfCodeBlocks, 33 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 13 ConstructedInterpolants, 0 QuantifiedInterpolants, 806 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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...