/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/acceleratedInterpolationWernerOverapprox_32.epf -i ../../../trunk/examples/svcomp/ldv-regression/test29-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:23:01,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:23:01,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:23:02,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-24 04:23:02,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-24 04:23:02,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-24 04:23:02,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-24 04:23:02,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-24 04:23:02,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-24 04:23:02,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-24 04:23:02,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-24 04:23:02,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-24 04:23:02,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:23:02,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:23:02,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:23:02,047 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:23:02,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:23:02,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:23:02,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:23:02,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:23:02,063 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:23:02,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:23:02,066 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:23:02,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:23:02,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-24 04:23:02,070 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-24 04:23:02,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-24 04:23:02,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-24 04:23:02,072 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-24 04:23:02,073 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-24 04:23:02,073 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-24 04:23:02,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-24 04:23:02,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-24 04:23:02,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-24 04:23:02,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-24 04:23:02,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-24 04:23:02,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-24 04:23:02,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-24 04:23:02,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:23:02,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:23:02,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:23:02,082 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-24 04:23:02,093 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:23:02,094 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:23:02,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:23:02,097 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:23:02,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:23:02,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:23:02,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:23:02,098 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:23:02,098 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:23:02,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:23:02,099 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:23:02,099 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:23:02,099 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:23:02,099 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:23:02,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:23:02,100 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:23:02,100 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:23:02,100 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:23:02,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:23:02,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:23:02,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:23:02,101 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:23:02,101 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:23:02,101 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:23:02,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:23:02,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:23:02,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:23:02,503 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:23:02,504 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:23:02,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test29-1.c [2021-02-24 04:23:02,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f74079dd/0e4dbace0464435aa47e7c90602e43f2/FLAG002e555a9 [2021-02-24 04:23:03,148 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:23:03,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test29-1.c [2021-02-24 04:23:03,155 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f74079dd/0e4dbace0464435aa47e7c90602e43f2/FLAG002e555a9 [2021-02-24 04:23:03,537 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f74079dd/0e4dbace0464435aa47e7c90602e43f2 [2021-02-24 04:23:03,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:23:03,554 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:23:03,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:23:03,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:23:03,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:23:03,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:23:03" (1/1) ... [2021-02-24 04:23:03,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@731b410e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:03, skipping insertion in model container [2021-02-24 04:23:03,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:23:03" (1/1) ... [2021-02-24 04:23:03,570 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:23:03,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:23:03,738 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] [2021-02-24 04:23:03,742 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:23:03,752 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:23:03,771 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] [2021-02-24 04:23:03,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:23:03,789 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:23:03,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:03 WrapperNode [2021-02-24 04:23:03,790 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:23:03,791 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:23:03,791 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:23:03,791 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:23:03,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:03" (1/1) ... [2021-02-24 04:23:03,805 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:03" (1/1) ... [2021-02-24 04:23:03,813 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:03" (1/1) ... [2021-02-24 04:23:03,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:03" (1/1) ... [2021-02-24 04:23:03,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:03" (1/1) ... [2021-02-24 04:23:03,823 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:03" (1/1) ... [2021-02-24 04:23:03,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:03" (1/1) ... [2021-02-24 04:23:03,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:23:03,828 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:23:03,828 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:23:03,828 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:23:03,829 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:03" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:23:03,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:23:03,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:23:03,940 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:23:03,940 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:23:03,940 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:23:03,941 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:23:03,941 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:23:03,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:23:03,941 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:23:03,941 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:23:03,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:23:03,942 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:23:03,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:23:03,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:23:03,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:23:03,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:23:04,374 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:23:04,375 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-24 04:23:04,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:23:04 BoogieIcfgContainer [2021-02-24 04:23:04,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:23:04,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:23:04,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:23:04,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:23:04,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:23:03" (1/3) ... [2021-02-24 04:23:04,383 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef44ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:23:04, skipping insertion in model container [2021-02-24 04:23:04,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:03" (2/3) ... [2021-02-24 04:23:04,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ef44ac0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:23:04, skipping insertion in model container [2021-02-24 04:23:04,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:23:04" (3/3) ... [2021-02-24 04:23:04,386 INFO L111 eAbstractionObserver]: Analyzing ICFG test29-1.c [2021-02-24 04:23:04,393 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:23:04,398 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:23:04,479 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:23:04,537 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:23:04,537 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:23:04,537 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:23:04,537 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:23:04,538 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:23:04,538 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:23:04,538 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:23:04,538 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:23:04,563 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-02-24 04:23:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-02-24 04:23:04,577 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:23:04,578 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] [2021-02-24 04:23:04,578 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:23:04,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:23:04,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1513235199, now seen corresponding path program 1 times [2021-02-24 04:23:04,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:23:04,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578804712] [2021-02-24 04:23:04,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:23:04,685 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:23:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:23:04,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:04,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:23:04,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:04,962 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-24 04:23:04,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:04,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:23:05,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:23:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:23:05,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:05,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:23:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:23:05,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578804712] [2021-02-24 04:23:05,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:23:05,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:23:05,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82299593] [2021-02-24 04:23:05,186 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:23:05,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:23:05,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:23:05,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:23:05,205 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 4 states. [2021-02-24 04:23:05,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:23:05,562 INFO L93 Difference]: Finished difference Result 63 states and 66 transitions. [2021-02-24 04:23:05,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:23:05,565 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2021-02-24 04:23:05,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:23:05,576 INFO L225 Difference]: With dead ends: 63 [2021-02-24 04:23:05,577 INFO L226 Difference]: Without dead ends: 37 [2021-02-24 04:23:05,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:23:05,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-24 04:23:05,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-02-24 04:23:05,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-02-24 04:23:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-02-24 04:23:05,646 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2021-02-24 04:23:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:23:05,647 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-02-24 04:23:05,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:23:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-02-24 04:23:05,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-24 04:23:05,650 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:23:05,650 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] [2021-02-24 04:23:05,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:23:05,651 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:23:05,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:23:05,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1236871684, now seen corresponding path program 1 times [2021-02-24 04:23:05,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:23:05,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701804544] [2021-02-24 04:23:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:23:05,666 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:23:05,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:23:05,771 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:05,773 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:23:05,776 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:05,777 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:23:05,786 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:05,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:23:05,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:05,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-24 04:23:05,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:05,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-24 04:23:05,828 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:05,829 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-24 04:23:05,837 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:05,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:23:05,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:23:05,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:23:05,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:05,879 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:23:05,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-24 04:23:05,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701804544] [2021-02-24 04:23:05,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:23:05,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-24 04:23:05,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442550752] [2021-02-24 04:23:05,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-24 04:23:05,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:23:05,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-24 04:23:05,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-24 04:23:05,888 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 8 states. [2021-02-24 04:23:06,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:23:06,088 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-02-24 04:23:06,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-02-24 04:23:06,089 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2021-02-24 04:23:06,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:23:06,090 INFO L225 Difference]: With dead ends: 53 [2021-02-24 04:23:06,091 INFO L226 Difference]: Without dead ends: 35 [2021-02-24 04:23:06,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-02-24 04:23:06,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-02-24 04:23:06,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-02-24 04:23:06,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-02-24 04:23:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 34 transitions. [2021-02-24 04:23:06,103 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 34 transitions. Word has length 34 [2021-02-24 04:23:06,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:23:06,104 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 34 transitions. [2021-02-24 04:23:06,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-24 04:23:06,104 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 34 transitions. [2021-02-24 04:23:06,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-02-24 04:23:06,105 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:23:06,106 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] [2021-02-24 04:23:06,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:23:06,106 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:23:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:23:06,107 INFO L82 PathProgramCache]: Analyzing trace with hash -425481732, now seen corresponding path program 1 times [2021-02-24 04:23:06,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:23:06,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481609140] [2021-02-24 04:23:06,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:23:06,110 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:23:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:23:06,152 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:23:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:23:06,191 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:23:06,236 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:23:06,237 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:23:06,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:23:06,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:23:06 BoogieIcfgContainer [2021-02-24 04:23:06,262 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:23:06,265 INFO L168 Benchmark]: Toolchain (without parser) took 2722.46 ms. Allocated memory was 152.0 MB in the beginning and 195.0 MB in the end (delta: 43.0 MB). Free memory was 128.5 MB in the beginning and 159.6 MB in the end (delta: -31.1 MB). Peak memory consumption was 13.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:23:06,268 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 152.0 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:23:06,271 INFO L168 Benchmark]: CACSL2BoogieTranslator took 234.36 ms. Allocated memory is still 152.0 MB. Free memory was 127.5 MB in the beginning and 118.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:23:06,274 INFO L168 Benchmark]: Boogie Preprocessor took 36.12 ms. Allocated memory is still 152.0 MB. Free memory was 117.9 MB in the beginning and 116.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:23:06,276 INFO L168 Benchmark]: RCFGBuilder took 549.04 ms. Allocated memory is still 152.0 MB. Free memory was 116.5 MB in the beginning and 99.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-02-24 04:23:06,282 INFO L168 Benchmark]: TraceAbstraction took 1884.82 ms. Allocated memory was 152.0 MB in the beginning and 195.0 MB in the end (delta: 43.0 MB). Free memory was 99.3 MB in the beginning and 159.6 MB in the end (delta: -60.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:23:06,289 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 152.0 MB. Free memory is still 125.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 234.36 ms. Allocated memory is still 152.0 MB. Free memory was 127.5 MB in the beginning and 118.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 36.12 ms. Allocated memory is still 152.0 MB. Free memory was 117.9 MB in the beginning and 116.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 549.04 ms. Allocated memory is still 152.0 MB. Free memory was 116.5 MB in the beginning and 99.7 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1884.82 ms. Allocated memory was 152.0 MB in the beginning and 195.0 MB in the end (delta: 43.0 MB). Free memory was 99.3 MB in the beginning and 159.6 MB in the end (delta: -60.3 MB). There was no memory consumed. 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 [L17] union dummy *pd = n ? &d1 : &d2; [L18] d1.a = __VERIFIER_nondet_int() [L19] COND FALSE !(pd == &d1) [L22] pd->b = 0 [L24] pd == &d2 && d1.a != 0 [L24] EXPR d1.a [L24] pd == &d2 && d1.a != 0 [L24] COND TRUE pd == &d2 && d1.a != 0 [L30] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 74 SDtfs, 67 SDslu, 118 SDs, 0 SdLazy, 138 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred 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: 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...