/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test06.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 18:06:17,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 18:06:17,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 18:06:17,878 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 18:06:17,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 18:06:17,905 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 18:06:17,906 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 18:06:17,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 18:06:17,909 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 18:06:17,910 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 18:06:17,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 18:06:17,914 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 18:06:17,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 18:06:17,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 18:06:17,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 18:06:17,920 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 18:06:17,923 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 18:06:17,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 18:06:17,934 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 18:06:17,935 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 18:06:17,936 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 18:06:17,948 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 18:06:17,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 18:06:17,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 18:06:17,951 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 18:06:17,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 18:06:17,951 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 18:06:17,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 18:06:17,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 18:06:17,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 18:06:17,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 18:06:17,953 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 18:06:17,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 18:06:17,954 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 18:06:17,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 18:06:17,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 18:06:17,954 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 18:06:17,955 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 18:06:17,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 18:06:17,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 18:06:17,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 18:06:17,956 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 18:06:17,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 18:06:17,957 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 18:06:18,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 18:06:18,354 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 18:06:18,357 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 18:06:18,359 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 18:06:18,360 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 18:06:18,361 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test06.c [2021-02-23 18:06:18,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30360a17e/ee7330644cec484493ffa5727ca51c0e/FLAG33da52264 [2021-02-23 18:06:19,058 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 18:06:19,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test06.c [2021-02-23 18:06:19,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30360a17e/ee7330644cec484493ffa5727ca51c0e/FLAG33da52264 [2021-02-23 18:06:19,458 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/30360a17e/ee7330644cec484493ffa5727ca51c0e [2021-02-23 18:06:19,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 18:06:19,476 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 18:06:19,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 18:06:19,481 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 18:06:19,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 18:06:19,486 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:06:19" (1/1) ... [2021-02-23 18:06:19,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@132a9b2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:19, skipping insertion in model container [2021-02-23 18:06:19,488 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 06:06:19" (1/1) ... [2021-02-23 18:06:19,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 18:06:19,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 18:06:19,713 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] [2021-02-23 18:06:19,717 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:06:19,729 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 18:06:19,747 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] [2021-02-23 18:06:19,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 18:06:19,766 INFO L208 MainTranslator]: Completed translation [2021-02-23 18:06:19,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:19 WrapperNode [2021-02-23 18:06:19,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 18:06:19,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 18:06:19,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 18:06:19,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 18:06:19,782 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:19" (1/1) ... [2021-02-23 18:06:19,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:19" (1/1) ... [2021-02-23 18:06:19,791 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:19" (1/1) ... [2021-02-23 18:06:19,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:19" (1/1) ... [2021-02-23 18:06:19,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:19" (1/1) ... [2021-02-23 18:06:19,802 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:19" (1/1) ... [2021-02-23 18:06:19,804 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:19" (1/1) ... [2021-02-23 18:06:19,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 18:06:19,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 18:06:19,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 18:06:19,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 18:06:19,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:19" (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 [2021-02-23 18:06:19,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 18:06:19,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 18:06:19,909 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 18:06:19,910 INFO L138 BoogieDeclarations]: Found implementation of procedure g [2021-02-23 18:06:19,910 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-02-23 18:06:19,910 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 18:06:19,910 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 18:06:19,910 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 18:06:19,911 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 18:06:19,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 18:06:19,911 INFO L130 BoogieDeclarations]: Found specification of procedure g [2021-02-23 18:06:19,911 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 18:06:19,911 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 18:06:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 18:06:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-02-23 18:06:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 18:06:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 18:06:19,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 18:06:19,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 18:06:19,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 18:06:19,913 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 18:06:20,454 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 18:06:20,455 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 18:06:20,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:06:20 BoogieIcfgContainer [2021-02-23 18:06:20,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 18:06:20,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 18:06:20,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 18:06:20,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 18:06:20,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 06:06:19" (1/3) ... [2021-02-23 18:06:20,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17bfba3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:06:20, skipping insertion in model container [2021-02-23 18:06:20,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 06:06:19" (2/3) ... [2021-02-23 18:06:20,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17bfba3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 06:06:20, skipping insertion in model container [2021-02-23 18:06:20,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 06:06:20" (3/3) ... [2021-02-23 18:06:20,471 INFO L111 eAbstractionObserver]: Analyzing ICFG test06.c [2021-02-23 18:06:20,481 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 18:06:20,486 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 18:06:20,504 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 18:06:20,538 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 18:06:20,538 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 18:06:20,539 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-23 18:06:20,539 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 18:06:20,539 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 18:06:20,539 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 18:06:20,539 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 18:06:20,539 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 18:06:20,559 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states. [2021-02-23 18:06:20,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 18:06:20,569 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:06:20,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:06:20,571 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:06:20,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:06:20,577 INFO L82 PathProgramCache]: Analyzing trace with hash -540717432, now seen corresponding path program 1 times [2021-02-23 18:06:20,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:06:20,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300302819] [2021-02-23 18:06:20,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:06:20,668 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:06:20,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:20,941 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:20,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:20,948 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:20,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:06:20,968 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:20,969 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:20,986 WARN L141 QuantifierPusher]: treesize reduction 8, result has 27.3 percent of original size [2021-02-23 18:06:20,988 WARN L147 QuantifierPusher]: treesize reduction 8, result has 27.3 percent of original size 3 [2021-02-23 18:06:21,008 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:21,009 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 18:06:21,022 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:21,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:21,035 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:21,036 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:21,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 18:06:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:21,090 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:21,091 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 18:06:21,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-02-23 18:06:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 18:06:21,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:21,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 18:06:21,140 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 18:06:21,140 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-23 18:06:21,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 18:06:21,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300302819] [2021-02-23 18:06:21,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 18:06:21,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-02-23 18:06:21,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830767430] [2021-02-23 18:06:21,172 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-23 18:06:21,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 18:06:21,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-23 18:06:21,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-02-23 18:06:21,190 INFO L87 Difference]: Start difference. First operand 83 states. Second operand 11 states. [2021-02-23 18:06:21,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 18:06:21,835 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2021-02-23 18:06:21,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-23 18:06:21,837 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2021-02-23 18:06:21,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 18:06:21,846 INFO L225 Difference]: With dead ends: 111 [2021-02-23 18:06:21,846 INFO L226 Difference]: Without dead ends: 57 [2021-02-23 18:06:21,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-02-23 18:06:21,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-02-23 18:06:21,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-02-23 18:06:21,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-02-23 18:06:21,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 56 transitions. [2021-02-23 18:06:21,901 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 56 transitions. Word has length 44 [2021-02-23 18:06:21,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 18:06:21,901 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 56 transitions. [2021-02-23 18:06:21,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-02-23 18:06:21,902 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 56 transitions. [2021-02-23 18:06:21,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-02-23 18:06:21,904 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 18:06:21,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 18:06:21,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 18:06:21,904 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 18:06:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 18:06:21,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1846319629, now seen corresponding path program 1 times [2021-02-23 18:06:21,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 18:06:21,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818869563] [2021-02-23 18:06:21,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 18:06:21,909 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-23 18:06:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:06:22,020 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:06:22,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 18:06:22,124 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 18:06:22,183 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 18:06:22,184 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 18:06:22,187 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 18:06:22,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 06:06:22 BoogieIcfgContainer [2021-02-23 18:06:22,210 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 18:06:22,214 INFO L168 Benchmark]: Toolchain (without parser) took 2747.85 ms. Allocated memory was 176.2 MB in the beginning and 219.2 MB in the end (delta: 43.0 MB). Free memory was 152.4 MB in the beginning and 124.8 MB in the end (delta: 27.6 MB). Peak memory consumption was 71.3 MB. Max. memory is 8.0 GB. [2021-02-23 18:06:22,215 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 176.2 MB. Free memory is still 149.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 18:06:22,218 INFO L168 Benchmark]: CACSL2BoogieTranslator took 286.05 ms. Allocated memory is still 176.2 MB. Free memory was 151.2 MB in the beginning and 141.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 18:06:22,219 INFO L168 Benchmark]: Boogie Preprocessor took 39.23 ms. Allocated memory is still 176.2 MB. Free memory was 141.7 MB in the beginning and 140.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 18:06:22,220 INFO L168 Benchmark]: RCFGBuilder took 649.37 ms. Allocated memory is still 176.2 MB. Free memory was 140.0 MB in the beginning and 151.5 MB in the end (delta: -11.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2021-02-23 18:06:22,222 INFO L168 Benchmark]: TraceAbstraction took 1748.69 ms. Allocated memory was 176.2 MB in the beginning and 219.2 MB in the end (delta: 43.0 MB). Free memory was 151.0 MB in the beginning and 124.8 MB in the end (delta: 26.2 MB). Peak memory consumption was 69.2 MB. Max. memory is 8.0 GB. [2021-02-23 18:06:22,239 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 176.2 MB. Free memory is still 149.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 286.05 ms. Allocated memory is still 176.2 MB. Free memory was 151.2 MB in the beginning and 141.7 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.23 ms. Allocated memory is still 176.2 MB. Free memory was 141.7 MB in the beginning and 140.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 649.37 ms. Allocated memory is still 176.2 MB. Free memory was 140.0 MB in the beginning and 151.5 MB in the end (delta: -11.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1748.69 ms. Allocated memory was 176.2 MB in the beginning and 219.2 MB in the end (delta: 43.0 MB). Free memory was 151.0 MB in the beginning and 124.8 MB in the end (delta: 26.2 MB). Peak memory consumption was 69.2 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) [L34] CALL, EXPR f(a, &p1, &p2) [L14] COND TRUE a == 4 [L15] CALL g(p1, p2) [L7] EXPR \read(**p2) [L7] int *pq = *p2; [L9] EXPR \read(**p2) [L9] *p1 = *p2 [L10] *pq = 0 [L15] RET g(p1, p2) [L16] return 1; [L34] RET, EXPR f(a, &p1, &p2) [L34] a = f(a, &p1, &p2) [L36] EXPR \read(*p1) [L36] COND TRUE *p1 == 0 [L42] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 86 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 58 SDtfs, 57 SDslu, 262 SDs, 0 SdLazy, 329 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...