/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/test29-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:12:18,972 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:12:18,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:12:19,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:12:19,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:12:19,011 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:12:19,012 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:12:19,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:12:19,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:12:19,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:12:19,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:12:19,020 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:12:19,021 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:12:19,022 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:12:19,023 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:12:19,025 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:12:19,037 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:12:19,039 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:12:19,043 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:12:19,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:12:19,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:12:19,059 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:12:19,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:12:19,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:12:19,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:12:19,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:12:19,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:12:19,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:12:19,086 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 16:12:19,138 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:12:19,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:12:19,142 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:12:19,142 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:12:19,143 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:12:19,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:12:19,144 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:12:19,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:12:19,145 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:12:19,145 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:12:19,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:12:19,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:12:19,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:12:19,145 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:12:19,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:12:19,146 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:12:19,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:12:19,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:12:19,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:12:19,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:12:19,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:12:19,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:12:19,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:12:19,148 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:12:19,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:12:19,149 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:12:19,149 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:12:19,149 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:12:19,149 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:12:19,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:12:19,567 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:12:19,570 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:12:19,572 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:12:19,572 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:12:19,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2021-02-21 16:12:19,654 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21e034ec7/820244136e1d42469fd4b797c3341a19/FLAG7ad98b783 [2021-02-21 16:12:20,222 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:12:20,223 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test29-1.c [2021-02-21 16:12:20,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21e034ec7/820244136e1d42469fd4b797c3341a19/FLAG7ad98b783 [2021-02-21 16:12:20,595 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21e034ec7/820244136e1d42469fd4b797c3341a19 [2021-02-21 16:12:20,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:12:20,616 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:12:20,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:12:20,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:12:20,627 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:12:20,628 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:12:20" (1/1) ... [2021-02-21 16:12:20,631 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e65905 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:20, skipping insertion in model container [2021-02-21 16:12:20,631 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:12:20" (1/1) ... [2021-02-21 16:12:20,641 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:12:20,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:12:20,870 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/test29-1.c[614,627] [2021-02-21 16:12:20,875 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:12:20,885 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:12:20,904 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/test29-1.c[614,627] [2021-02-21 16:12:20,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:12:20,922 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:12:20,922 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:20 WrapperNode [2021-02-21 16:12:20,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:12:20,924 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:12:20,924 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:12:20,924 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:12:20,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:20" (1/1) ... [2021-02-21 16:12:20,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:20" (1/1) ... [2021-02-21 16:12:20,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:20" (1/1) ... [2021-02-21 16:12:20,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:20" (1/1) ... [2021-02-21 16:12:20,953 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:20" (1/1) ... [2021-02-21 16:12:20,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:20" (1/1) ... [2021-02-21 16:12:20,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:20" (1/1) ... [2021-02-21 16:12:20,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:12:20,960 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:12:20,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:12:20,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:12:20,961 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:20" (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 16:12:21,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:12:21,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:12:21,070 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:12:21,070 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:12:21,070 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:12:21,071 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:12:21,071 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:12:21,071 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:12:21,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:12:21,071 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:12:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:12:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:12:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:12:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:12:21,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:12:21,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:12:21,383 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:12:21,383 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:12:21,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:12:21 BoogieIcfgContainer [2021-02-21 16:12:21,389 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:12:21,391 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:12:21,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:12:21,404 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:12:21,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:12:20" (1/3) ... [2021-02-21 16:12:21,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2fafb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:12:21, skipping insertion in model container [2021-02-21 16:12:21,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:12:20" (2/3) ... [2021-02-21 16:12:21,406 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b2fafb8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:12:21, skipping insertion in model container [2021-02-21 16:12:21,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:12:21" (3/3) ... [2021-02-21 16:12:21,408 INFO L111 eAbstractionObserver]: Analyzing ICFG test29-1.c [2021-02-21 16:12:21,423 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:12:21,434 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:12:21,457 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:12:21,504 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:12:21,504 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:12:21,504 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:12:21,504 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:12:21,505 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:12:21,505 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:12:21,505 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:12:21,505 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:12:21,522 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2021-02-21 16:12:21,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-21 16:12:21,527 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:12:21,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:12:21,528 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:12:21,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:12:21,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1943681295, now seen corresponding path program 1 times [2021-02-21 16:12:21,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:12:21,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503641975] [2021-02-21 16:12:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:12:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:12:21,868 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:21,870 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:12:21,872 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:21,873 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:12:21,908 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:21,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:12:21,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:21,953 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-21 16:12:21,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:21,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-21 16:12:21,999 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:22,002 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:12:22,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:12:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:12:22,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:12:22,129 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:12:22,135 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 16:12:22,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503641975] [2021-02-21 16:12:22,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:12:22,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-21 16:12:22,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905777963] [2021-02-21 16:12:22,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-21 16:12:22,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:12:22,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-21 16:12:22,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-21 16:12:22,170 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 7 states. [2021-02-21 16:12:22,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:12:22,349 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-02-21 16:12:22,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-21 16:12:22,351 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 13 [2021-02-21 16:12:22,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:12:22,360 INFO L225 Difference]: With dead ends: 31 [2021-02-21 16:12:22,360 INFO L226 Difference]: Without dead ends: 14 [2021-02-21 16:12:22,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-02-21 16:12:22,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-02-21 16:12:22,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-02-21 16:12:22,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-02-21 16:12:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 13 transitions. [2021-02-21 16:12:22,406 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 13 transitions. Word has length 13 [2021-02-21 16:12:22,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:12:22,406 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 13 transitions. [2021-02-21 16:12:22,406 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-21 16:12:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 13 transitions. [2021-02-21 16:12:22,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-21 16:12:22,407 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:12:22,407 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:12:22,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:12:22,408 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:12:22,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:12:22,409 INFO L82 PathProgramCache]: Analyzing trace with hash -166826891, now seen corresponding path program 1 times [2021-02-21 16:12:22,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:12:22,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301431410] [2021-02-21 16:12:22,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:12:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:12:22,440 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:12:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:12:22,463 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:12:22,489 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 16:12:22,492 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 16:12:22,493 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:12:22,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:12:22 BoogieIcfgContainer [2021-02-21 16:12:22,524 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:12:22,526 INFO L168 Benchmark]: Toolchain (without parser) took 1924.13 ms. Allocated memory is still 152.0 MB. Free memory was 126.6 MB in the beginning and 90.8 MB in the end (delta: 35.9 MB). Peak memory consumption was 36.8 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:22,526 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 152.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:12:22,527 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.55 ms. Allocated memory is still 152.0 MB. Free memory was 125.5 MB in the beginning and 116.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:22,528 INFO L168 Benchmark]: Boogie Preprocessor took 35.57 ms. Allocated memory is still 152.0 MB. Free memory was 116.1 MB in the beginning and 114.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:22,530 INFO L168 Benchmark]: RCFGBuilder took 428.95 ms. Allocated memory is still 152.0 MB. Free memory was 114.5 MB in the beginning and 100.7 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:22,531 INFO L168 Benchmark]: TraceAbstraction took 1133.47 ms. Allocated memory is still 152.0 MB. Free memory was 100.3 MB in the beginning and 90.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.6 MB. Max. memory is 8.0 GB. [2021-02-21 16:12:22,535 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 152.0 MB. Free memory is still 124.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 300.55 ms. Allocated memory is still 152.0 MB. Free memory was 125.5 MB in the beginning and 116.1 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 35.57 ms. Allocated memory is still 152.0 MB. Free memory was 116.1 MB in the beginning and 114.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 428.95 ms. Allocated memory is still 152.0 MB. Free memory was 114.5 MB in the beginning and 100.7 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1133.47 ms. Allocated memory is still 152.0 MB. Free memory was 100.3 MB in the beginning and 90.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 10.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 30]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] union dummy d1, d2; [L16] int n = __VERIFIER_nondet_int(); [L17] EXPR n ? &d1 : &d2 VAL [d1={8:0}, d2={3:0}, n=0, n ? &d1 : &d2={3:0}] [L17] union dummy *pd = n ? &d1 : &d2; [L18] d1.a = __VERIFIER_nondet_int() [L19] COND FALSE !(pd == &d1) [L22] pd->b = 0 VAL [d1={8:0}, d2={3:0}, n=0, pd={3:0}] [L24] pd == &d2 && d1.a != 0 [L24] EXPR d1.a [L24] pd == &d2 && d1.a != 0 VAL [d1={8:0}, d1.a=-1, d2={3:0}, n=0, pd={3:0}, pd == &d2 && d1.a != 0=1] [L24] COND TRUE pd == &d2 && d1.a != 0 [L30] reach_error() VAL [d1={8:0}, d2={3:0}, n=0, pd={3:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 9 SDtfs, 18 SDslu, 24 SDs, 0 SdLazy, 53 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 26 NumberOfCodeBlocks, 26 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 12 ConstructedInterpolants, 0 QuantifiedInterpolants, 804 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...