/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 20:11:19,545 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 20:11:19,548 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 20:11:19,582 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 20:11:19,583 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 20:11:19,584 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 20:11:19,586 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 20:11:19,588 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 20:11:19,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 20:11:19,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 20:11:19,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 20:11:19,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 20:11:19,595 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 20:11:19,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 20:11:19,598 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 20:11:19,600 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 20:11:19,601 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 20:11:19,602 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 20:11:19,604 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 20:11:19,634 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 20:11:19,649 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 20:11:19,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 20:11:19,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 20:11:19,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 20:11:19,662 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 20:11:19,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 20:11:19,683 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 20:11:19,684 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 20:11:19,685 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 20:11:19,698 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 20:11:19,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 20:11:19,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 20:11:19,701 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 20:11:19,701 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 20:11:19,701 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 20:11:19,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 20:11:19,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 20:11:19,702 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 20:11:19,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 20:11:19,703 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 20:11:19,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 20:11:19,703 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 20:11:19,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 20:11:19,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 20:11:19,704 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 20:11:19,705 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 20:11:19,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 20:11:19,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:11:19,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 20:11:19,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 20:11:19,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 20:11:19,706 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 20:11:20,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 20:11:20,128 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 20:11:20,132 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 20:11:20,134 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 20:11:20,135 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 20:11:20,136 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2021-02-21 20:11:20,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/319a127aa/ed4e6d66508b42668dd547332058866c/FLAGef671facc [2021-02-21 20:11:20,871 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 20:11:20,872 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2021-02-21 20:11:20,879 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/319a127aa/ed4e6d66508b42668dd547332058866c/FLAGef671facc [2021-02-21 20:11:21,245 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/319a127aa/ed4e6d66508b42668dd547332058866c [2021-02-21 20:11:21,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 20:11:21,271 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 20:11:21,274 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 20:11:21,274 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 20:11:21,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 20:11:21,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:11:21" (1/1) ... [2021-02-21 20:11:21,281 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cf493ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:21, skipping insertion in model container [2021-02-21 20:11:21,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 08:11:21" (1/1) ... [2021-02-21 20:11:21,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 20:11:21,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 20:11:21,463 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c[373,386] [2021-02-21 20:11:21,494 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:11:21,504 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 20:11:21,517 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c[373,386] [2021-02-21 20:11:21,528 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 20:11:21,544 INFO L208 MainTranslator]: Completed translation [2021-02-21 20:11:21,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:21 WrapperNode [2021-02-21 20:11:21,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 20:11:21,547 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 20:11:21,547 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 20:11:21,547 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 20:11:21,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:21" (1/1) ... [2021-02-21 20:11:21,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:21" (1/1) ... [2021-02-21 20:11:21,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:21" (1/1) ... [2021-02-21 20:11:21,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:21" (1/1) ... [2021-02-21 20:11:21,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:21" (1/1) ... [2021-02-21 20:11:21,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:21" (1/1) ... [2021-02-21 20:11:21,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:21" (1/1) ... [2021-02-21 20:11:21,587 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 20:11:21,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 20:11:21,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 20:11:21,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 20:11:21,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 20:11:21,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 20:11:21,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 20:11:21,793 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 20:11:21,793 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 20:11:21,793 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 20:11:21,793 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 20:11:21,793 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 20:11:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 20:11:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 20:11:21,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-21 20:11:21,795 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 20:11:21,795 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 20:11:21,795 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 20:11:21,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 20:11:21,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 20:11:21,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 20:11:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 20:11:21,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 20:11:22,210 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 20:11:22,211 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 20:11:22,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:11:22 BoogieIcfgContainer [2021-02-21 20:11:22,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 20:11:22,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 20:11:22,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 20:11:22,218 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 20:11:22,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 08:11:21" (1/3) ... [2021-02-21 20:11:22,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6636effa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:11:22, skipping insertion in model container [2021-02-21 20:11:22,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 08:11:21" (2/3) ... [2021-02-21 20:11:22,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6636effa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 08:11:22, skipping insertion in model container [2021-02-21 20:11:22,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 08:11:22" (3/3) ... [2021-02-21 20:11:22,222 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2021-02-21 20:11:22,229 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 20:11:22,234 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 20:11:22,252 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 20:11:22,279 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 20:11:22,279 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 20:11:22,280 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 20:11:22,280 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 20:11:22,280 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 20:11:22,280 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 20:11:22,280 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 20:11:22,281 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 20:11:22,299 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2021-02-21 20:11:22,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-21 20:11:22,309 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:22,310 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] [2021-02-21 20:11:22,310 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:22,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:22,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1882360896, now seen corresponding path program 1 times [2021-02-21 20:11:22,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:22,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659359771] [2021-02-21 20:11:22,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:22,421 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:22,554 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:22,555 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:22,557 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:22,557 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:22,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:22,660 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:22,661 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:22,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:11:22,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659359771] [2021-02-21 20:11:22,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:22,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 20:11:22,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526977557] [2021-02-21 20:11:22,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 20:11:22,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:22,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 20:11:22,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 20:11:22,722 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 3 states. [2021-02-21 20:11:22,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:22,954 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2021-02-21 20:11:22,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 20:11:22,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2021-02-21 20:11:22,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:22,968 INFO L225 Difference]: With dead ends: 71 [2021-02-21 20:11:22,969 INFO L226 Difference]: Without dead ends: 53 [2021-02-21 20:11:22,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 20:11:22,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-21 20:11:23,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-02-21 20:11:23,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-02-21 20:11:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2021-02-21 20:11:23,079 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 20 [2021-02-21 20:11:23,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:23,082 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2021-02-21 20:11:23,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 20:11:23,083 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2021-02-21 20:11:23,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-02-21 20:11:23,085 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:23,085 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] [2021-02-21 20:11:23,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 20:11:23,086 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:23,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:23,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1961783702, now seen corresponding path program 1 times [2021-02-21 20:11:23,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:23,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289196618] [2021-02-21 20:11:23,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:23,100 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:23,218 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:23,219 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:23,220 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:23,221 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 20:11:23,254 WARN L141 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size [2021-02-21 20:11:23,256 WARN L147 QuantifierPusher]: treesize reduction 1, result has 97.4 percent of original size 38 [2021-02-21 20:11:23,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:23,260 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:23,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:23,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:23,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:11:23,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289196618] [2021-02-21 20:11:23,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:23,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:11:23,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116180531] [2021-02-21 20:11:23,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:11:23,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:23,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:11:23,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:11:23,307 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 4 states. [2021-02-21 20:11:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:23,541 INFO L93 Difference]: Finished difference Result 63 states and 74 transitions. [2021-02-21 20:11:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:11:23,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2021-02-21 20:11:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:23,543 INFO L225 Difference]: With dead ends: 63 [2021-02-21 20:11:23,544 INFO L226 Difference]: Without dead ends: 58 [2021-02-21 20:11:23,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:11:23,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-21 20:11:23,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2021-02-21 20:11:23,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-02-21 20:11:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2021-02-21 20:11:23,564 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 20 [2021-02-21 20:11:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:23,565 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2021-02-21 20:11:23,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:11:23,565 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2021-02-21 20:11:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-21 20:11:23,567 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:23,567 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] [2021-02-21 20:11:23,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 20:11:23,568 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:23,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:23,569 INFO L82 PathProgramCache]: Analyzing trace with hash 567746209, now seen corresponding path program 1 times [2021-02-21 20:11:23,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:23,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842821109] [2021-02-21 20:11:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:23,592 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:11:23,595 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:23,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:23,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:23,634 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:23,636 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:23,636 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 20:11:23,641 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:23,642 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:23,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 20:11:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 20:11:23,676 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 20:11:23,677 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 20:11:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 20:11:23,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842821109] [2021-02-21 20:11:23,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 20:11:23,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 20:11:23,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505544236] [2021-02-21 20:11:23,684 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 20:11:23,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 20:11:23,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 20:11:23,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 20:11:23,685 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 4 states. [2021-02-21 20:11:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 20:11:23,960 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2021-02-21 20:11:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 20:11:23,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2021-02-21 20:11:23,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 20:11:23,964 INFO L225 Difference]: With dead ends: 104 [2021-02-21 20:11:23,964 INFO L226 Difference]: Without dead ends: 66 [2021-02-21 20:11:23,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 20:11:23,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-02-21 20:11:23,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-02-21 20:11:23,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-02-21 20:11:23,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 76 transitions. [2021-02-21 20:11:23,990 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 76 transitions. Word has length 41 [2021-02-21 20:11:23,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 20:11:23,990 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 76 transitions. [2021-02-21 20:11:23,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 20:11:23,991 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 76 transitions. [2021-02-21 20:11:23,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-21 20:11:23,993 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 20:11:23,993 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] [2021-02-21 20:11:23,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 20:11:23,993 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 20:11:23,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 20:11:23,994 INFO L82 PathProgramCache]: Analyzing trace with hash -2018797759, now seen corresponding path program 1 times [2021-02-21 20:11:23,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 20:11:23,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975342800] [2021-02-21 20:11:23,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 20:11:24,100 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 20:11:24,102 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 20:11:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:11:24,137 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:11:24,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 20:11:24,165 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 20:11:24,194 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 20:11:24,195 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 20:11:24,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 20:11:24,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 08:11:24 BoogieIcfgContainer [2021-02-21 20:11:24,213 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 20:11:24,215 INFO L168 Benchmark]: Toolchain (without parser) took 2955.40 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 134.7 MB in the beginning and 138.0 MB in the end (delta: -3.4 MB). Peak memory consumption was 26.9 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:24,216 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 20:11:24,217 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.09 ms. Allocated memory is still 151.0 MB. Free memory was 133.5 MB in the beginning and 123.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:24,218 INFO L168 Benchmark]: Boogie Preprocessor took 40.55 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 122.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:24,218 INFO L168 Benchmark]: RCFGBuilder took 625.04 ms. Allocated memory is still 151.0 MB. Free memory was 122.0 MB in the beginning and 118.2 MB in the end (delta: 3.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:24,219 INFO L168 Benchmark]: TraceAbstraction took 1998.66 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 117.5 MB in the beginning and 138.0 MB in the end (delta: -20.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. [2021-02-21 20:11:24,223 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 151.0 MB. Free memory is still 125.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 272.09 ms. Allocated memory is still 151.0 MB. Free memory was 133.5 MB in the beginning and 123.7 MB in the end (delta: 9.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.55 ms. Allocated memory is still 151.0 MB. Free memory was 123.7 MB in the beginning and 122.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 625.04 ms. Allocated memory is still 151.0 MB. Free memory was 122.0 MB in the beginning and 118.2 MB in the end (delta: 3.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1998.66 ms. Allocated memory was 151.0 MB in the beginning and 181.4 MB in the end (delta: 30.4 MB). Free memory was 117.5 MB in the beginning and 138.0 MB in the end (delta: -20.5 MB). Peak memory consumption was 11.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = __VERIFIER_nondet_uint(); [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L19] x += 2 [L21] COND FALSE !(y % 2 == 0) [L22] x -= 2 [L24] COND FALSE !(y % 2 == 0) [L25] x += 2 [L27] COND FALSE !(y % 2 == 0) [L28] x -= 2 [L30] COND FALSE !(y % 2 == 0) [L31] x += 2 [L33] COND FALSE !(y % 2 == 0) [L34] x -= 4 [L36] COND FALSE !(y % 2 == 0) [L37] x += 4 [L39] COND FALSE !(y % 2 == 0) [L40] x += 2 [L42] COND FALSE !(y % 2 == 0) [L43] x -= 4 [L45] COND FALSE !(y % 2 == 0) [L46] x -= 4 [L17] COND FALSE !(x < 99) [L49] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 63 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 183 SDtfs, 192 SDslu, 36 SDs, 0 SdLazy, 113 SolverSat, 26 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 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...