/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/test10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:11:36,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:11:36,964 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:11:37,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 16:11:37,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:11:37,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:11:37,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:11:37,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:11:37,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:11:37,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:11:37,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:11:37,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:11:37,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:11:37,093 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:11:37,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:11:37,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:11:37,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:11:37,115 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:11:37,116 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:11:37,117 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:11:37,122 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 16:11:37,168 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:11:37,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:11:37,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:11:37,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:11:37,173 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:11:37,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:11:37,174 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:11:37,174 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:11:37,174 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:11:37,174 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:11:37,175 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:11:37,176 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:11:37,176 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:11:37,176 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:11:37,176 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:11:37,176 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:11:37,177 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:11:37,177 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:11:37,177 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:11:37,177 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:11:37,177 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:11:37,178 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:11:37,178 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:11:37,178 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:11:37,178 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:11:37,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:11:37,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:11:37,179 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:11:37,179 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:11:37,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:11:37,618 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:11:37,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:11:37,622 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:11:37,623 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:11:37,624 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test10.c [2021-02-21 16:11:37,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8952b9a7a/0dd478c9cfc346acbbd9e94bdaa072a2/FLAG53feaa3f2 [2021-02-21 16:11:38,255 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:11:38,256 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test10.c [2021-02-21 16:11:38,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8952b9a7a/0dd478c9cfc346acbbd9e94bdaa072a2/FLAG53feaa3f2 [2021-02-21 16:11:38,666 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8952b9a7a/0dd478c9cfc346acbbd9e94bdaa072a2 [2021-02-21 16:11:38,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:11:38,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:11:38,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:11:38,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:11:38,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:11:38,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:11:38" (1/1) ... [2021-02-21 16:11:38,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe7845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:38, skipping insertion in model container [2021-02-21 16:11:38,698 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:11:38" (1/1) ... [2021-02-21 16:11:38,707 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:11:38,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:11:38,932 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/test10.c[715,728] [2021-02-21 16:11:38,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:11:38,946 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:11:38,965 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/test10.c[715,728] [2021-02-21 16:11:38,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:11:38,983 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:11:38,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:38 WrapperNode [2021-02-21 16:11:38,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:11:38,985 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:11:38,986 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:11:38,986 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:11:38,996 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:38" (1/1) ... [2021-02-21 16:11:38,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:38" (1/1) ... [2021-02-21 16:11:39,004 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:38" (1/1) ... [2021-02-21 16:11:39,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:38" (1/1) ... [2021-02-21 16:11:39,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:38" (1/1) ... [2021-02-21 16:11:39,014 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:38" (1/1) ... [2021-02-21 16:11:39,016 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:38" (1/1) ... [2021-02-21 16:11:39,018 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:11:39,019 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:11:39,019 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:11:39,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:11:39,021 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:38" (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 16:11:39,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:11:39,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:11:39,165 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:11:39,165 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-02-21 16:11:39,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:11:39,166 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:11:39,166 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:11:39,166 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:11:39,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:11:39,167 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:11:39,167 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-02-21 16:11:39,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-21 16:11:39,168 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-21 16:11:39,169 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:11:39,169 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:11:39,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:11:39,170 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:11:39,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:11:39,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-02-21 16:11:39,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:11:39,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:11:39,626 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:11:39,627 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:11:39,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:11:39 BoogieIcfgContainer [2021-02-21 16:11:39,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:11:39,631 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:11:39,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:11:39,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:11:39,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:11:38" (1/3) ... [2021-02-21 16:11:39,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e6a72c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:11:39, skipping insertion in model container [2021-02-21 16:11:39,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:11:38" (2/3) ... [2021-02-21 16:11:39,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66e6a72c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:11:39, skipping insertion in model container [2021-02-21 16:11:39,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:11:39" (3/3) ... [2021-02-21 16:11:39,639 INFO L111 eAbstractionObserver]: Analyzing ICFG test10.c [2021-02-21 16:11:39,655 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:11:39,668 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:11:39,715 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:11:39,770 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:11:39,770 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:11:39,771 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:11:39,771 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:11:39,771 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:11:39,771 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:11:39,771 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:11:39,771 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:11:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-02-21 16:11:39,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-21 16:11:39,794 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:11:39,795 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:11:39,796 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:11:39,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:11:39,802 INFO L82 PathProgramCache]: Analyzing trace with hash 352279405, now seen corresponding path program 1 times [2021-02-21 16:11:39,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:11:39,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474984191] [2021-02-21 16:11:39,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:11:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:11:40,346 WARN L141 QuantifierPusher]: treesize reduction 13, result has 61.8 percent of original size [2021-02-21 16:11:40,348 WARN L147 QuantifierPusher]: treesize reduction 13, result has 61.8 percent of original size 21 [2021-02-21 16:11:40,399 WARN L141 QuantifierPusher]: treesize reduction 12, result has 76.0 percent of original size [2021-02-21 16:11:40,406 WARN L147 QuantifierPusher]: treesize reduction 12, result has 76.0 percent of original size 38 [2021-02-21 16:11:40,491 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:11:40,493 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-02-21 16:11:40,513 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:11:40,514 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 16:11:40,522 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:11:40,523 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:11:40,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:11:40,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:11:40,658 WARN L141 QuantifierPusher]: treesize reduction 11, result has 69.4 percent of original size [2021-02-21 16:11:40,664 WARN L147 QuantifierPusher]: treesize reduction 11, result has 69.4 percent of original size 25 [2021-02-21 16:11:40,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 16:11:40,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:11:40,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:11:40,748 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-21 16:11:40,779 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 16:11:40,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474984191] [2021-02-21 16:11:40,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:11:40,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-21 16:11:40,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970046098] [2021-02-21 16:11:40,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-21 16:11:40,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:11:40,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-21 16:11:40,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-21 16:11:40,809 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 9 states. [2021-02-21 16:11:41,337 WARN L202 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2021-02-21 16:11:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:11:41,594 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-02-21 16:11:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-21 16:11:41,596 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2021-02-21 16:11:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:11:41,604 INFO L225 Difference]: With dead ends: 26 [2021-02-21 16:11:41,605 INFO L226 Difference]: Without dead ends: 15 [2021-02-21 16:11:41,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-02-21 16:11:41,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-02-21 16:11:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-02-21 16:11:41,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-02-21 16:11:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 14 transitions. [2021-02-21 16:11:41,648 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 14 transitions. Word has length 14 [2021-02-21 16:11:41,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:11:41,649 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 14 transitions. [2021-02-21 16:11:41,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-21 16:11:41,649 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 14 transitions. [2021-02-21 16:11:41,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-21 16:11:41,650 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:11:41,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:11:41,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:11:41,651 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:11:41,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:11:41,652 INFO L82 PathProgramCache]: Analyzing trace with hash 352281327, now seen corresponding path program 1 times [2021-02-21 16:11:41,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:11:41,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453653297] [2021-02-21 16:11:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:11:41,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:11:41,799 WARN L141 QuantifierPusher]: treesize reduction 13, result has 61.8 percent of original size [2021-02-21 16:11:41,800 WARN L147 QuantifierPusher]: treesize reduction 13, result has 61.8 percent of original size 21 [2021-02-21 16:11:41,817 WARN L141 QuantifierPusher]: treesize reduction 12, result has 74.5 percent of original size [2021-02-21 16:11:41,819 WARN L147 QuantifierPusher]: treesize reduction 12, result has 74.5 percent of original size 35 [2021-02-21 16:11:41,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:11:41,861 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-02-21 16:11:41,898 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:11:41,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:11:41,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:11:41,909 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 16:11:41,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:11:41,919 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:11:41,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:11:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:11:42,053 WARN L141 QuantifierPusher]: treesize reduction 11, result has 69.4 percent of original size [2021-02-21 16:11:42,056 WARN L147 QuantifierPusher]: treesize reduction 11, result has 69.4 percent of original size 25 [2021-02-21 16:11:42,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-02-21 16:11:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:11:42,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:11:42,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 26 [2021-02-21 16:11:42,149 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 16:11:42,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453653297] [2021-02-21 16:11:42,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:11:42,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-21 16:11:42,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702163053] [2021-02-21 16:11:42,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-21 16:11:42,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:11:42,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-21 16:11:42,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-02-21 16:11:42,155 INFO L87 Difference]: Start difference. First operand 15 states and 14 transitions. Second operand 10 states. [2021-02-21 16:11:42,745 WARN L202 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 93 [2021-02-21 16:11:43,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:11:43,094 INFO L93 Difference]: Finished difference Result 15 states and 14 transitions. [2021-02-21 16:11:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-21 16:11:43,095 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-02-21 16:11:43,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:11:43,095 INFO L225 Difference]: With dead ends: 15 [2021-02-21 16:11:43,095 INFO L226 Difference]: Without dead ends: 0 [2021-02-21 16:11:43,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-02-21 16:11:43,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-02-21 16:11:43,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-02-21 16:11:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-02-21 16:11:43,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-02-21 16:11:43,098 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-02-21 16:11:43,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:11:43,098 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-02-21 16:11:43,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-21 16:11:43,098 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-02-21 16:11:43,098 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-02-21 16:11:43,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:11:43,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-02-21 16:11:43,431 WARN L202 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-02-21 16:11:43,562 WARN L202 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 42 [2021-02-21 16:11:43,567 INFO L189 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-02-21 16:11:43,567 INFO L189 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-02-21 16:11:43,567 INFO L189 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-02-21 16:11:43,567 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:11:43,568 INFO L185 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |~#p1~0.base| |old(~#p1~0.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(~#a~0.offset)| |~#a~0.offset|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |~#b~0.base| |old(~#b~0.base)|) (= ~pp2~0.base |old(~pp2~0.base)|) (= |old(~pp1~0.base)| ~pp1~0.base) (= |old(~#a~0.base)| |~#a~0.base|) (= |old(#t~string4.offset)| |#t~string4.offset|) (= |old(~#b~0.offset)| |~#b~0.offset|) (= |old(#valid)| |#valid|) (= |old(#NULL.base)| |#NULL.base|) (= |#t~string5.base| |old(#t~string5.base)|) (= |old(~#p2~0.base)| |~#p2~0.base|) (= |old(~pp2~0.offset)| ~pp2~0.offset) (= |old(~#p2~0.offset)| |~#p2~0.offset|) (= |old(#t~string6.offset)| |#t~string6.offset|) (= |old(~pp1~0.offset)| ~pp1~0.offset) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |~#p1~0.offset| |old(~#p1~0.offset)|)) [2021-02-21 16:11:43,568 INFO L189 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:11:43,568 INFO L189 CegarLoopUtils]: For program point fEXIT(lines 11 16) no Hoare annotation was computed. [2021-02-21 16:11:43,568 INFO L185 CegarLoopUtils]: At program point fENTRY(lines 11 16) the Hoare annotation is: (or (not (= |~#p1~0.offset| ~pp1~0.offset)) (= |~#b~0.base| ~pp1~0.base) (not (= (select (select |old(#memory_$Pointer$.offset)| |old(~pp2~0.base)|) |old(~pp2~0.offset)|) |~#b~0.offset|)) (and (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (= |old(~pp2~0.offset)| ~pp2~0.offset) (= |#memory_int| |old(#memory_int)|) (= ~pp2~0.base |old(~pp2~0.base)|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|)) (not (= |~#b~0.base| (select (select |old(#memory_$Pointer$.base)| |old(~pp2~0.base)|) |old(~pp2~0.offset)|))) (not (= |~#p1~0.base| ~pp1~0.base)) (= |~#p1~0.base| |~#a~0.base|) (= |~#b~0.base| |~#p2~0.base|) (= |~#p2~0.base| |~#a~0.base|) (= |~#b~0.base| |~#a~0.base|)) [2021-02-21 16:11:43,568 INFO L189 CegarLoopUtils]: For program point fFINAL(lines 11 16) no Hoare annotation was computed. [2021-02-21 16:11:43,569 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-02-21 16:11:43,569 INFO L185 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: (and (not (= |~#b~0.base| |~#p1~0.base|)) (not (= |~#p2~0.base| |~#a~0.base|)) (not (= |~#b~0.base| |~#p2~0.base|)) (not (= |~#b~0.base| |~#a~0.base|)) (not (= |~#p1~0.base| |~#a~0.base|))) [2021-02-21 16:11:43,569 INFO L192 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-02-21 16:11:43,569 INFO L189 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-02-21 16:11:43,569 INFO L185 CegarLoopUtils]: At program point L33(line 33) the Hoare annotation is: (or (= |~#p1~0.base| |~#a~0.base|) (= |~#b~0.base| |~#p2~0.base|) (and (= (select (select |#memory_$Pointer$.offset| ~pp2~0.base) ~pp2~0.offset) |~#b~0.offset|) (= |~#p1~0.offset| ~pp1~0.offset) (= |~#p1~0.base| ~pp1~0.base) (= |~#b~0.base| (select (select |#memory_$Pointer$.base| ~pp2~0.base) ~pp2~0.offset))) (= |~#p2~0.base| |~#a~0.base|) (= |~#b~0.base| |~#a~0.base|) (= |~#b~0.base| |~#p1~0.base|)) [2021-02-21 16:11:43,569 INFO L189 CegarLoopUtils]: For program point L33-1(line 33) no Hoare annotation was computed. [2021-02-21 16:11:43,570 INFO L189 CegarLoopUtils]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 49) no Hoare annotation was computed. [2021-02-21 16:11:43,570 INFO L185 CegarLoopUtils]: At program point mainENTRY(lines 18 51) the Hoare annotation is: (or (= |~#p1~0.base| |~#a~0.base|) (= |~#b~0.base| |~#p2~0.base|) (= |~#p2~0.base| |~#a~0.base|) (= |~#b~0.base| |~#a~0.base|) (and (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (= |old(~pp2~0.offset)| ~pp2~0.offset) (= |#memory_int| |old(#memory_int)|) (= |old(~pp1~0.offset)| ~pp1~0.offset) (= ~pp2~0.base |old(~pp2~0.base)|) (= |old(~pp1~0.base)| ~pp1~0.base) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|)) (= |~#b~0.base| |~#p1~0.base|)) [2021-02-21 16:11:43,570 INFO L189 CegarLoopUtils]: For program point mainEXIT(lines 18 51) no Hoare annotation was computed. [2021-02-21 16:11:43,570 INFO L189 CegarLoopUtils]: For program point mainFINAL(lines 18 51) no Hoare annotation was computed. [2021-02-21 16:11:43,570 INFO L185 CegarLoopUtils]: At program point L44(lines 18 51) the Hoare annotation is: (or (= |~#p2~0.base| |~#b~0.base|) (= |~#a~0.base| |~#p1~0.base|) (= |~#p2~0.base| |~#a~0.base|) (= |~#a~0.base| |~#b~0.base|) (= |~#p1~0.base| |~#b~0.base|)) [2021-02-21 16:11:43,571 INFO L189 CegarLoopUtils]: For program point L43(line 43) no Hoare annotation was computed. [2021-02-21 16:11:43,571 INFO L189 CegarLoopUtils]: For program point L43-2(lines 43 45) no Hoare annotation was computed. [2021-02-21 16:11:43,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:11:43 BoogieIcfgContainer [2021-02-21 16:11:43,589 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:11:43,590 INFO L168 Benchmark]: Toolchain (without parser) took 4915.80 ms. Allocated memory was 159.4 MB in the beginning and 230.7 MB in the end (delta: 71.3 MB). Free memory was 141.9 MB in the beginning and 172.8 MB in the end (delta: -30.9 MB). Peak memory consumption was 112.2 MB. Max. memory is 8.0 GB. [2021-02-21 16:11:43,591 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 159.4 MB. Free memory was 130.9 MB in the beginning and 130.8 MB in the end (delta: 76.4 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:11:43,592 INFO L168 Benchmark]: CACSL2BoogieTranslator took 294.26 ms. Allocated memory is still 159.4 MB. Free memory was 140.8 MB in the beginning and 131.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:11:43,593 INFO L168 Benchmark]: Boogie Preprocessor took 33.05 ms. Allocated memory is still 159.4 MB. Free memory was 131.1 MB in the beginning and 129.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:11:43,594 INFO L168 Benchmark]: RCFGBuilder took 609.69 ms. Allocated memory is still 159.4 MB. Free memory was 129.5 MB in the beginning and 123.6 MB in the end (delta: 5.9 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. [2021-02-21 16:11:43,595 INFO L168 Benchmark]: TraceAbstraction took 3957.85 ms. Allocated memory was 159.4 MB in the beginning and 230.7 MB in the end (delta: 71.3 MB). Free memory was 123.2 MB in the beginning and 172.8 MB in the end (delta: -49.6 MB). Peak memory consumption was 94.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:11:43,598 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 159.4 MB. Free memory was 130.9 MB in the beginning and 130.8 MB in the end (delta: 76.4 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 294.26 ms. Allocated memory is still 159.4 MB. Free memory was 140.8 MB in the beginning and 131.1 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 33.05 ms. Allocated memory is still 159.4 MB. Free memory was 131.1 MB in the beginning and 129.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 609.69 ms. Allocated memory is still 159.4 MB. Free memory was 129.5 MB in the beginning and 123.6 MB in the end (delta: 5.9 MB). Peak memory consumption was 5.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3957.85 ms. Allocated memory was 159.4 MB in the beginning and 230.7 MB in the end (delta: 71.3 MB). Free memory was 123.2 MB in the beginning and 172.8 MB in the end (delta: -49.6 MB). Peak memory consumption was 94.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 49]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 18]: Loop Invariant Derived loop invariant: (((p2 == b || a == p1) || p2 == a) || a == b) || p1 == b - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 18 SDtfs, 20 SDslu, 56 SDs, 0 SdLazy, 102 SolverSat, 32 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 7 NumberOfFragments, 236 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 203 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 28 NumberOfCodeBlocks, 28 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 7488 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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 correct! Received shutdown request...