/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/test08.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-22 01:57:06,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-22 01:57:06,502 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-22 01:57:06,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-22 01:57:06,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-22 01:57:06,558 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-22 01:57:06,559 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-22 01:57:06,560 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-22 01:57:06,573 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-22 01:57:06,575 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-22 01:57:06,577 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-22 01:57:06,580 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-22 01:57:06,582 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-22 01:57:06,583 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-22 01:57:06,585 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-22 01:57:06,586 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-22 01:57:06,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-22 01:57:06,603 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationWernerOverapprox_32.epf [2021-02-22 01:57:06,620 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-22 01:57:06,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-22 01:57:06,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-22 01:57:06,626 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-22 01:57:06,627 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-22 01:57:06,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-22 01:57:06,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-22 01:57:06,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-22 01:57:06,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-22 01:57:06,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-22 01:57:06,631 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-22 01:57:06,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-22 01:57:06,632 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-22 01:57:06,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-22 01:57:06,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-22 01:57:06,633 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-22 01:57:06,634 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-22 01:57:06,634 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-22 01:57:06,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-22 01:57:06,635 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-22 01:57:06,635 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-22 01:57:06,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-22 01:57:06,635 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-22 01:57:06,636 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-22 01:57:07,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-22 01:57:07,097 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-22 01:57:07,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-22 01:57:07,102 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-22 01:57:07,103 INFO L275 PluginConnector]: CDTParser initialized [2021-02-22 01:57:07,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test08.c [2021-02-22 01:57:07,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4380d6feb/98a020c1ee894e40b92c023a77428954/FLAGf29078cd2 [2021-02-22 01:57:07,869 INFO L306 CDTParser]: Found 1 translation units. [2021-02-22 01:57:07,870 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test08.c [2021-02-22 01:57:07,877 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4380d6feb/98a020c1ee894e40b92c023a77428954/FLAGf29078cd2 [2021-02-22 01:57:08,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4380d6feb/98a020c1ee894e40b92c023a77428954 [2021-02-22 01:57:08,219 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-22 01:57:08,235 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-22 01:57:08,241 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-22 01:57:08,242 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-22 01:57:08,246 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-22 01:57:08,247 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:57:08" (1/1) ... [2021-02-22 01:57:08,248 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2acdea07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:08, skipping insertion in model container [2021-02-22 01:57:08,249 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.02 01:57:08" (1/1) ... [2021-02-22 01:57:08,258 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-22 01:57:08,278 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-22 01:57:08,520 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/test08.c[578,591] [2021-02-22 01:57:08,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:57:08,542 INFO L203 MainTranslator]: Completed pre-run [2021-02-22 01:57:08,564 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/test08.c[578,591] [2021-02-22 01:57:08,565 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-22 01:57:08,584 INFO L208 MainTranslator]: Completed translation [2021-02-22 01:57:08,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:08 WrapperNode [2021-02-22 01:57:08,586 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-22 01:57:08,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-22 01:57:08,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-22 01:57:08,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-22 01:57:08,606 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:08" (1/1) ... [2021-02-22 01:57:08,607 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:08" (1/1) ... [2021-02-22 01:57:08,617 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:08" (1/1) ... [2021-02-22 01:57:08,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:08" (1/1) ... [2021-02-22 01:57:08,640 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:08" (1/1) ... [2021-02-22 01:57:08,643 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:08" (1/1) ... [2021-02-22 01:57:08,647 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:08" (1/1) ... [2021-02-22 01:57:08,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-22 01:57:08,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-22 01:57:08,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-22 01:57:08,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-22 01:57:08,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:08" (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 [2021-02-22 01:57:08,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-22 01:57:08,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-22 01:57:08,772 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-22 01:57:08,773 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2021-02-22 01:57:08,773 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-22 01:57:08,773 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-22 01:57:08,773 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-22 01:57:08,773 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-22 01:57:08,774 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-22 01:57:08,774 INFO L130 BoogieDeclarations]: Found specification of procedure f [2021-02-22 01:57:08,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-22 01:57:08,774 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-22 01:57:08,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-22 01:57:08,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-22 01:57:08,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-22 01:57:08,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-22 01:57:08,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-22 01:57:09,212 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-22 01:57:09,212 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-22 01:57:09,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:57:09 BoogieIcfgContainer [2021-02-22 01:57:09,218 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-22 01:57:09,219 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-22 01:57:09,219 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-22 01:57:09,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-22 01:57:09,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.02 01:57:08" (1/3) ... [2021-02-22 01:57:09,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1058816e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:57:09, skipping insertion in model container [2021-02-22 01:57:09,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.02 01:57:08" (2/3) ... [2021-02-22 01:57:09,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1058816e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.02 01:57:09, skipping insertion in model container [2021-02-22 01:57:09,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.02 01:57:09" (3/3) ... [2021-02-22 01:57:09,228 INFO L111 eAbstractionObserver]: Analyzing ICFG test08.c [2021-02-22 01:57:09,239 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-22 01:57:09,244 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-22 01:57:09,267 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-22 01:57:09,300 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-22 01:57:09,300 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-22 01:57:09,301 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-22 01:57:09,301 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-22 01:57:09,301 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-22 01:57:09,301 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-22 01:57:09,301 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-22 01:57:09,301 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-22 01:57:09,328 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states. [2021-02-22 01:57:09,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-02-22 01:57:09,337 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:57:09,338 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] [2021-02-22 01:57:09,338 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:57:09,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:57:09,345 INFO L82 PathProgramCache]: Analyzing trace with hash 775193509, now seen corresponding path program 1 times [2021-02-22 01:57:09,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:57:09,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504294369] [2021-02-22 01:57:09,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:57:09,435 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:57:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:09,689 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:09,692 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:57:09,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:09,721 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-22 01:57:09,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:09,750 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-22 01:57:09,761 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:09,762 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:57:09,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:09,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:57:09,770 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:09,771 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:09,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-22 01:57:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:09,910 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:09,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-22 01:57:09,911 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:09,912 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-22 01:57:09,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:09,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-22 01:57:09,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-02-22 01:57:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-22 01:57:09,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-22 01:57:09,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-22 01:57:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-22 01:57:09,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504294369] [2021-02-22 01:57:09,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-22 01:57:09,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-02-22 01:57:09,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78002719] [2021-02-22 01:57:09,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-02-22 01:57:09,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-22 01:57:10,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-02-22 01:57:10,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-02-22 01:57:10,008 INFO L87 Difference]: Start difference. First operand 57 states. Second operand 10 states. [2021-02-22 01:57:10,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-22 01:57:10,436 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-02-22 01:57:10,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-22 01:57:10,438 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2021-02-22 01:57:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-22 01:57:10,448 INFO L225 Difference]: With dead ends: 77 [2021-02-22 01:57:10,448 INFO L226 Difference]: Without dead ends: 48 [2021-02-22 01:57:10,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-02-22 01:57:10,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-02-22 01:57:10,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-02-22 01:57:10,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2021-02-22 01:57:10,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 47 transitions. [2021-02-22 01:57:10,503 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 47 transitions. Word has length 46 [2021-02-22 01:57:10,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-22 01:57:10,504 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 47 transitions. [2021-02-22 01:57:10,504 INFO L481 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-02-22 01:57:10,504 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 47 transitions. [2021-02-22 01:57:10,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-22 01:57:10,506 INFO L414 BasicCegarLoop]: Found error trace [2021-02-22 01:57:10,506 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] [2021-02-22 01:57:10,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-22 01:57:10,507 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-22 01:57:10,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-22 01:57:10,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1026799709, now seen corresponding path program 1 times [2021-02-22 01:57:10,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-22 01:57:10,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060098274] [2021-02-22 01:57:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-22 01:57:10,511 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-22 01:57:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:57:10,602 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:57:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-22 01:57:10,677 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-22 01:57:10,744 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-22 01:57:10,746 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-22 01:57:10,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-22 01:57:10,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.02 01:57:10 BoogieIcfgContainer [2021-02-22 01:57:10,778 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-22 01:57:10,782 INFO L168 Benchmark]: Toolchain (without parser) took 2557.02 ms. Allocated memory is still 151.0 MB. Free memory was 127.0 MB in the beginning and 71.1 MB in the end (delta: 55.9 MB). Peak memory consumption was 56.2 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:10,784 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 124.3 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-22 01:57:10,788 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.66 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:10,791 INFO L168 Benchmark]: Boogie Preprocessor took 65.68 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 115.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:10,793 INFO L168 Benchmark]: RCFGBuilder took 558.89 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 129.1 MB in the end (delta: -14.1 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:10,794 INFO L168 Benchmark]: TraceAbstraction took 1558.98 ms. Allocated memory is still 151.0 MB. Free memory was 128.5 MB in the beginning and 71.1 MB in the end (delta: 57.4 MB). Peak memory consumption was 58.5 MB. Max. memory is 8.0 GB. [2021-02-22 01:57:10,807 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 151.0 MB. Free memory was 124.8 MB in the beginning and 124.3 MB in the end (delta: 435.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 345.66 ms. Allocated memory is still 151.0 MB. Free memory was 125.8 MB in the beginning and 116.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 65.68 ms. Allocated memory is still 151.0 MB. Free memory was 116.4 MB in the beginning and 115.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 558.89 ms. Allocated memory is still 151.0 MB. Free memory was 115.0 MB in the beginning and 129.1 MB in the end (delta: -14.1 MB). Peak memory consumption was 15.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1558.98 ms. Allocated memory is still 151.0 MB. Free memory was 128.5 MB in the beginning and 71.1 MB in the end (delta: 57.4 MB). Peak memory consumption was 58.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 38]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L6] int a, b; [L7] int *p1, *p2; [L21] p1 = &a [L22] p2 = &b [L24] b = 1 [L25] a = 5 [L27] EXPR \read(a) [L27] a-- [L29] CALL, EXPR f() [L10] EXPR \read(*p1) [L10] EXPR \read(*p2) [L10] EXPR \read(a) [L10] int v = *p1 + *p2 - a; [L11] COND TRUE v == 1 [L12] p1 = p2 [L13] return v; [L29] RET, EXPR f() [L29] a = f() [L31] EXPR \read(a) [L31] COND TRUE a && p1 == p2 [L38] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 60 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 38 SDtfs, 150 SDslu, 87 SDs, 0 SdLazy, 88 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred 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...