/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/test28-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:22:59,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:22:59,427 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:22:59,463 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:22:59,476 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:22:59,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:22:59,478 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:22:59,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:22:59,500 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:22:59,502 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:22:59,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:22:59,506 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:22:59,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:22:59,510 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:22:59,511 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:22:59,512 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:22:59,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:22:59,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:22:59,527 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:22:59,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:22:59,530 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 04:22:59,542 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:22:59,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:22:59,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:22:59,544 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:22:59,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:22:59,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:22:59,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:22:59,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:22:59,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:22:59,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:22:59,547 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:22:59,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:22:59,547 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:22:59,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:22:59,548 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:22:59,548 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:22:59,548 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:22:59,549 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:22:59,549 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:22:59,549 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:22:59,550 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:22:59,550 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:22:59,550 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:22:59,550 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:22:59,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:23:00,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:23:00,012 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:23:00,013 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:23:00,014 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:23:00,015 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test28-1.c [2021-02-24 04:23:00,091 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0d5ff337/7a8c5aebc8614eb89f775a591e3e911a/FLAG1eadb7d29 [2021-02-24 04:23:00,666 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:23:00,667 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test28-1.c [2021-02-24 04:23:00,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0d5ff337/7a8c5aebc8614eb89f775a591e3e911a/FLAG1eadb7d29 [2021-02-24 04:23:00,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0d5ff337/7a8c5aebc8614eb89f775a591e3e911a [2021-02-24 04:23:01,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:23:01,014 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:23:01,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:23:01,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:23:01,021 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:23:01,021 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:23:00" (1/1) ... [2021-02-24 04:23:01,023 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@708c1c5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:01, skipping insertion in model container [2021-02-24 04:23:01,023 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:23:00" (1/1) ... [2021-02-24 04:23:01,032 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:23:01,048 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:23:01,212 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/test28-1.c[576,589] [2021-02-24 04:23:01,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:23:01,226 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:23:01,243 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/test28-1.c[576,589] [2021-02-24 04:23:01,244 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:23:01,259 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:23:01,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:01 WrapperNode [2021-02-24 04:23:01,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:23:01,261 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:23:01,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:23:01,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:23:01,275 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:01" (1/1) ... [2021-02-24 04:23:01,275 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:01" (1/1) ... [2021-02-24 04:23:01,284 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:01" (1/1) ... [2021-02-24 04:23:01,284 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:01" (1/1) ... [2021-02-24 04:23:01,292 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:01" (1/1) ... [2021-02-24 04:23:01,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:01" (1/1) ... [2021-02-24 04:23:01,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:01" (1/1) ... [2021-02-24 04:23:01,299 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:23:01,300 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:23:01,300 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:23:01,300 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:23:01,301 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:01" (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 04:23:01,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:23:01,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:23:01,412 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:23:01,412 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:23:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:23:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:23:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:23:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:23:01,413 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:23:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:23:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:23:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:23:01,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:23:01,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:23:01,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:23:01,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:23:01,804 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:23:01,805 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-24 04:23:01,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:23:01 BoogieIcfgContainer [2021-02-24 04:23:01,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:23:01,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:23:01,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:23:01,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:23:01,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:23:00" (1/3) ... [2021-02-24 04:23:01,826 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6f182f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:23:01, skipping insertion in model container [2021-02-24 04:23:01,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:23:01" (2/3) ... [2021-02-24 04:23:01,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6f182f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:23:01, skipping insertion in model container [2021-02-24 04:23:01,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:23:01" (3/3) ... [2021-02-24 04:23:01,832 INFO L111 eAbstractionObserver]: Analyzing ICFG test28-1.c [2021-02-24 04:23:01,845 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:23:01,857 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:23:01,908 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:23:01,957 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:23:01,958 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:23:01,958 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:23:01,958 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:23:01,958 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:23:01,958 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:23:01,958 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:23:01,959 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:23:01,974 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2021-02-24 04:23:01,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-24 04:23:01,983 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:23:01,984 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] [2021-02-24 04:23:01,985 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:23:01,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:23:01,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1684913090, now seen corresponding path program 1 times [2021-02-24 04:23:02,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:23:02,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024702731] [2021-02-24 04:23:02,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:23:02,082 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:23:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:23:02,222 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:23:02,225 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,226 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-24 04:23:02,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:23:02,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:23:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:23:02,296 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,297 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:23:02,307 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 04:23:02,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024702731] [2021-02-24 04:23:02,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:23:02,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:23:02,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781319123] [2021-02-24 04:23:02,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:23:02,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:23:02,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:23:02,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:23:02,336 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 4 states. [2021-02-24 04:23:02,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:23:02,466 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2021-02-24 04:23:02,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:23:02,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2021-02-24 04:23:02,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:23:02,478 INFO L225 Difference]: With dead ends: 60 [2021-02-24 04:23:02,478 INFO L226 Difference]: Without dead ends: 34 [2021-02-24 04:23:02,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:23:02,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-02-24 04:23:02,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-02-24 04:23:02,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2021-02-24 04:23:02,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-02-24 04:23:02,526 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2021-02-24 04:23:02,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:23:02,526 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-02-24 04:23:02,527 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:23:02,527 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-02-24 04:23:02,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-24 04:23:02,528 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:23:02,529 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] [2021-02-24 04:23:02,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:23:02,529 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:23:02,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:23:02,530 INFO L82 PathProgramCache]: Analyzing trace with hash 536824223, now seen corresponding path program 1 times [2021-02-24 04:23:02,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:23:02,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471801612] [2021-02-24 04:23:02,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:23:02,534 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:23:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:23:02,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,605 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:23:02,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:23:02,611 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,612 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:23:02,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:23:02,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:23:02,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,634 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:23:02,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,644 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-02-24 04:23:02,655 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,655 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:23:02,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:23:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:23:02,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:23:02,715 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 04:23:02,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471801612] [2021-02-24 04:23:02,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:23:02,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-02-24 04:23:02,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240696877] [2021-02-24 04:23:02,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-24 04:23:02,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:23:02,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-24 04:23:02,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-02-24 04:23:02,720 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand 9 states. [2021-02-24 04:23:02,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:23:02,921 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-02-24 04:23:02,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-24 04:23:02,922 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2021-02-24 04:23:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:23:02,923 INFO L225 Difference]: With dead ends: 43 [2021-02-24 04:23:02,924 INFO L226 Difference]: Without dead ends: 33 [2021-02-24 04:23:02,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-02-24 04:23:02,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-02-24 04:23:02,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-02-24 04:23:02,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2021-02-24 04:23:02,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-02-24 04:23:02,936 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2021-02-24 04:23:02,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:23:02,936 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-02-24 04:23:02,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-02-24 04:23:02,937 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-02-24 04:23:02,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-24 04:23:02,938 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:23:02,938 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] [2021-02-24 04:23:02,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:23:02,938 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:23:02,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:23:02,939 INFO L82 PathProgramCache]: Analyzing trace with hash -2041206465, now seen corresponding path program 1 times [2021-02-24 04:23:02,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:23:02,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658702068] [2021-02-24 04:23:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:23:02,942 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:23:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:23:02,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,983 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:23:02,984 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,984 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-02-24 04:23:02,988 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,989 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:23:02,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:02,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:23:03,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:03,001 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-24 04:23:03,007 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:03,011 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:23:03,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:23:03,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:23:03,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:23:03,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:23:03,081 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 04:23:03,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658702068] [2021-02-24 04:23:03,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:23:03,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-02-24 04:23:03,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731315970] [2021-02-24 04:23:03,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-24 04:23:03,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:23:03,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-24 04:23:03,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-02-24 04:23:03,085 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 7 states. [2021-02-24 04:23:03,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:23:03,260 INFO L93 Difference]: Finished difference Result 46 states and 45 transitions. [2021-02-24 04:23:03,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-24 04:23:03,261 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2021-02-24 04:23:03,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:23:03,263 INFO L225 Difference]: With dead ends: 46 [2021-02-24 04:23:03,263 INFO L226 Difference]: Without dead ends: 32 [2021-02-24 04:23:03,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-02-24 04:23:03,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-02-24 04:23:03,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-02-24 04:23:03,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-24 04:23:03,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 31 transitions. [2021-02-24 04:23:03,278 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 31 transitions. Word has length 31 [2021-02-24 04:23:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:23:03,278 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 31 transitions. [2021-02-24 04:23:03,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-24 04:23:03,278 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 31 transitions. [2021-02-24 04:23:03,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-24 04:23:03,279 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:23:03,280 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] [2021-02-24 04:23:03,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-24 04:23:03,280 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:23:03,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:23:03,281 INFO L82 PathProgramCache]: Analyzing trace with hash -143124065, now seen corresponding path program 1 times [2021-02-24 04:23:03,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:23:03,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590306635] [2021-02-24 04:23:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:23:03,284 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:23:03,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:23:03,312 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:23:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:23:03,348 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:23:03,389 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:23:03,389 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:23:03,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:23:03,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:23:03 BoogieIcfgContainer [2021-02-24 04:23:03,410 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:23:03,412 INFO L168 Benchmark]: Toolchain (without parser) took 2409.36 ms. Allocated memory is still 151.0 MB. Free memory was 127.4 MB in the beginning and 75.6 MB in the end (delta: 51.7 MB). Peak memory consumption was 52.9 MB. Max. memory is 8.0 GB. [2021-02-24 04:23:03,412 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:23:03,413 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.09 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:23:03,414 INFO L168 Benchmark]: Boogie Preprocessor took 37.90 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:23:03,415 INFO L168 Benchmark]: RCFGBuilder took 510.27 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 131.5 MB in the end (delta: -16.2 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:23:03,415 INFO L168 Benchmark]: TraceAbstraction took 1598.06 ms. Allocated memory is still 151.0 MB. Free memory was 130.9 MB in the beginning and 75.6 MB in the end (delta: 55.3 MB). Peak memory consumption was 55.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:23:03,419 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 151.0 MB. Free memory is still 124.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 244.09 ms. Allocated memory is still 151.0 MB. Free memory was 126.3 MB in the beginning and 116.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.90 ms. Allocated memory is still 151.0 MB. Free memory was 116.8 MB in the beginning and 115.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 510.27 ms. Allocated memory is still 151.0 MB. Free memory was 115.3 MB in the beginning and 131.5 MB in the end (delta: -16.2 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1598.06 ms. Allocated memory is still 151.0 MB. Free memory was 130.9 MB in the beginning and 75.6 MB in the end (delta: 55.3 MB). Peak memory consumption was 55.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 28]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] struct dummy d1, d2; [L15] int n = __VERIFIER_nondet_int(); [L16] EXPR n ? &d1 : &d2 [L16] struct dummy *pd = n ? &d1 : &d2; [L17] COND TRUE pd == &d2 [L18] pd->a = 0 [L22] pd == &d2 && d2.b != 0 [L22] EXPR d2.b [L22] pd == &d2 && d2.b != 0 [L22] COND TRUE pd == &d2 && d2.b != 0 [L28] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 95 SDtfs, 97 SDslu, 225 SDs, 0 SdLazy, 184 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred 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, 3 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...