/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/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-24 04:22:54,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-24 04:22:54,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-24 04:22:54,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-24 04:22:54,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-24 04:22:54,620 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-24 04:22:54,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-24 04:22:54,623 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-24 04:22:54,624 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-24 04:22:54,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-24 04:22:54,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-24 04:22:54,648 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-24 04:22:54,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-24 04:22:54,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-24 04:22:54,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-24 04:22:54,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-24 04:22:54,657 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-24 04:22:54,668 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-24 04:22:54,669 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-24 04:22:54,670 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-24 04:22:54,671 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 04:22:54,684 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-24 04:22:54,684 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-24 04:22:54,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-24 04:22:54,687 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-24 04:22:54,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-24 04:22:54,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-24 04:22:54,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-24 04:22:54,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-24 04:22:54,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-24 04:22:54,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-24 04:22:54,688 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-24 04:22:54,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-24 04:22:54,689 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-24 04:22:54,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-24 04:22:54,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-24 04:22:54,690 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-24 04:22:54,690 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-24 04:22:54,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-24 04:22:54,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-24 04:22:54,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-24 04:22:54,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-24 04:22:54,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-24 04:22:54,691 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=WERNER_OVERAPPROX [2021-02-24 04:22:54,692 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-24 04:22:55,067 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-24 04:22:55,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-24 04:22:55,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-24 04:22:55,109 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-24 04:22:55,110 INFO L275 PluginConnector]: CDTParser initialized [2021-02-24 04:22:55,111 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2021-02-24 04:22:55,198 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7517bab/0f7b0c792acd42338b41d272abb300ac/FLAG2a83e3fe6 [2021-02-24 04:22:55,817 INFO L306 CDTParser]: Found 1 translation units. [2021-02-24 04:22:55,818 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-regression/test24-2.c [2021-02-24 04:22:55,825 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7517bab/0f7b0c792acd42338b41d272abb300ac/FLAG2a83e3fe6 [2021-02-24 04:22:56,201 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2a7517bab/0f7b0c792acd42338b41d272abb300ac [2021-02-24 04:22:56,206 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-24 04:22:56,226 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-24 04:22:56,232 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-24 04:22:56,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-24 04:22:56,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-24 04:22:56,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:22:56" (1/1) ... [2021-02-24 04:22:56,241 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58e81f91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:56, skipping insertion in model container [2021-02-24 04:22:56,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 04:22:56" (1/1) ... [2021-02-24 04:22:56,251 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-24 04:22:56,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-24 04:22:56,504 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/test24-2.c[807,820] [2021-02-24 04:22:56,508 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:22:56,519 INFO L203 MainTranslator]: Completed pre-run [2021-02-24 04:22:56,544 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/test24-2.c[807,820] [2021-02-24 04:22:56,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-24 04:22:56,566 INFO L208 MainTranslator]: Completed translation [2021-02-24 04:22:56,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:56 WrapperNode [2021-02-24 04:22:56,566 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-24 04:22:56,568 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-24 04:22:56,568 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-24 04:22:56,568 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-24 04:22:56,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:56" (1/1) ... [2021-02-24 04:22:56,584 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:56" (1/1) ... [2021-02-24 04:22:56,592 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:56" (1/1) ... [2021-02-24 04:22:56,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:56" (1/1) ... [2021-02-24 04:22:56,602 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:56" (1/1) ... [2021-02-24 04:22:56,607 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:56" (1/1) ... [2021-02-24 04:22:56,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:56" (1/1) ... [2021-02-24 04:22:56,611 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-24 04:22:56,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-24 04:22:56,616 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-24 04:22:56,616 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-24 04:22:56,617 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:56" (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 04:22:56,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-24 04:22:56,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-24 04:22:56,752 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-24 04:22:56,753 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2021-02-24 04:22:56,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-24 04:22:56,753 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-24 04:22:56,753 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-24 04:22:56,754 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-24 04:22:56,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-24 04:22:56,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-24 04:22:56,755 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-24 04:22:56,755 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-24 04:22:56,755 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-24 04:22:56,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-24 04:22:56,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-24 04:22:56,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-24 04:22:56,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-24 04:22:56,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-24 04:22:57,331 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-24 04:22:57,331 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-02-24 04:22:57,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:22:57 BoogieIcfgContainer [2021-02-24 04:22:57,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-24 04:22:57,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-24 04:22:57,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-24 04:22:57,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-24 04:22:57,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 04:22:56" (1/3) ... [2021-02-24 04:22:57,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dbcbd74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:22:57, skipping insertion in model container [2021-02-24 04:22:57,341 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 04:22:56" (2/3) ... [2021-02-24 04:22:57,341 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dbcbd74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 04:22:57, skipping insertion in model container [2021-02-24 04:22:57,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 04:22:57" (3/3) ... [2021-02-24 04:22:57,343 INFO L111 eAbstractionObserver]: Analyzing ICFG test24-2.c [2021-02-24 04:22:57,350 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-24 04:22:57,356 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-24 04:22:57,376 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-24 04:22:57,401 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-24 04:22:57,401 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-24 04:22:57,402 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-24 04:22:57,402 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-24 04:22:57,402 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-24 04:22:57,402 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-24 04:22:57,402 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-24 04:22:57,402 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-24 04:22:57,419 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2021-02-24 04:22:57,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-02-24 04:22:57,430 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:22:57,431 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] [2021-02-24 04:22:57,431 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:22:57,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:22:57,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1271161021, now seen corresponding path program 1 times [2021-02-24 04:22:57,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:22:57,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225298449] [2021-02-24 04:22:57,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:22:57,527 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:22:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:22:57,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:57,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:22:57,663 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:57,664 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:22:57,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:22:57,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:22:57,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:57,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:22:57,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2021-02-24 04:22:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:22:57,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:57,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:22:57,764 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 04:22:57,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225298449] [2021-02-24 04:22:57,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:22:57,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-24 04:22:57,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837819708] [2021-02-24 04:22:57,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-24 04:22:57,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:22:57,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-24 04:22:57,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:22:57,795 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 3 states. [2021-02-24 04:22:57,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:22:57,987 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-02-24 04:22:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-24 04:22:57,989 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2021-02-24 04:22:57,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:22:58,006 INFO L225 Difference]: With dead ends: 108 [2021-02-24 04:22:58,006 INFO L226 Difference]: Without dead ends: 58 [2021-02-24 04:22:58,013 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-24 04:22:58,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-02-24 04:22:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-02-24 04:22:58,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-02-24 04:22:58,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-02-24 04:22:58,076 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 42 [2021-02-24 04:22:58,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:22:58,077 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-02-24 04:22:58,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-24 04:22:58,077 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-02-24 04:22:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-24 04:22:58,079 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:22:58,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:22:58,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-24 04:22:58,080 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:22:58,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:22:58,081 INFO L82 PathProgramCache]: Analyzing trace with hash -645916160, now seen corresponding path program 1 times [2021-02-24 04:22:58,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:22:58,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391632004] [2021-02-24 04:22:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:22:58,085 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-24 04:22:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:22:58,193 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:58,194 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:22:58,195 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:58,196 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-24 04:22:58,201 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:58,202 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:22:58,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-24 04:22:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:22:58,249 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:58,250 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:22:58,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-02-24 04:22:58,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-24 04:22:58,260 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:58,261 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-24 04:22:58,265 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 04:22:58,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391632004] [2021-02-24 04:22:58,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-24 04:22:58,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-24 04:22:58,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678937649] [2021-02-24 04:22:58,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-24 04:22:58,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-24 04:22:58,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-24 04:22:58,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-24 04:22:58,270 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 4 states. [2021-02-24 04:22:58,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-24 04:22:58,433 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2021-02-24 04:22:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-24 04:22:58,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2021-02-24 04:22:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-24 04:22:58,436 INFO L225 Difference]: With dead ends: 97 [2021-02-24 04:22:58,436 INFO L226 Difference]: Without dead ends: 67 [2021-02-24 04:22:58,438 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 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 04:22:58,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-02-24 04:22:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2021-02-24 04:22:58,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-02-24 04:22:58,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-02-24 04:22:58,452 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 44 [2021-02-24 04:22:58,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-24 04:22:58,453 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-02-24 04:22:58,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-24 04:22:58,453 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-02-24 04:22:58,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-02-24 04:22:58,455 INFO L414 BasicCegarLoop]: Found error trace [2021-02-24 04:22:58,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-24 04:22:58,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-24 04:22:58,456 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-24 04:22:58,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-24 04:22:58,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1721582074, now seen corresponding path program 1 times [2021-02-24 04:22:58,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-24 04:22:58,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176890547] [2021-02-24 04:22:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-24 04:22:58,505 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:58,521 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-02-24 04:22:58,529 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:58,532 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-02-24 04:22:58,550 WARN L141 QuantifierPusher]: treesize reduction 4, result has 86.7 percent of original size [2021-02-24 04:22:58,566 INFO L723 QuantifierPusher]: Distributing 5 disjuncts over 3 conjuncts [2021-02-24 04:22:58,573 INFO L730 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:58,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-24 04:22:58,577 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-24 04:22:58,586 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 58 [2021-02-24 04:22:58,590 WARN L147 QuantifierPusher]: treesize reduction 4, result has 86.7 percent of original size 26 [2021-02-24 04:22:58,599 WARN L141 QuantifierPusher]: treesize reduction 11, result has 86.4 percent of original size [2021-02-24 04:22:58,604 WARN L147 QuantifierPusher]: treesize reduction 11, result has 86.4 percent of original size 70 [2021-02-24 04:22:58,606 INFO L206 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-02-24 04:22:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:22:58,678 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:22:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-24 04:22:58,753 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-24 04:22:58,794 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-24 04:22:58,794 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-24 04:22:58,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-24 04:22:58,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 04:22:58 BoogieIcfgContainer [2021-02-24 04:22:58,814 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-24 04:22:58,816 INFO L168 Benchmark]: Toolchain (without parser) took 2602.71 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 100.9 MB in the end (delta: 26.0 MB). Peak memory consumption was 27.1 MB. Max. memory is 8.0 GB. [2021-02-24 04:22:58,817 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 120.5 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-24 04:22:58,818 INFO L168 Benchmark]: CACSL2BoogieTranslator took 334.84 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-24 04:22:58,819 INFO L168 Benchmark]: Boogie Preprocessor took 44.10 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-02-24 04:22:58,820 INFO L168 Benchmark]: RCFGBuilder took 718.32 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 128.3 MB in the end (delta: -13.9 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. [2021-02-24 04:22:58,820 INFO L168 Benchmark]: TraceAbstraction took 1478.67 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 100.9 MB in the end (delta: 26.9 MB). Peak memory consumption was 26.3 MB. Max. memory is 8.0 GB. [2021-02-24 04:22:58,824 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 120.5 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 334.84 ms. Allocated memory is still 151.0 MB. Free memory was 125.9 MB in the beginning and 116.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 44.10 ms. Allocated memory is still 151.0 MB. Free memory was 116.1 MB in the beginning and 114.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 718.32 ms. Allocated memory is still 151.0 MB. Free memory was 114.4 MB in the beginning and 128.3 MB in the end (delta: -13.9 MB). Peak memory consumption was 17.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1478.67 ms. Allocated memory is still 151.0 MB. Free memory was 127.8 MB in the beginning and 100.9 MB in the end (delta: 26.9 MB). Peak memory consumption was 26.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] struct dummy ad1[20], *ad2; [L18] int i, j, *pa; [L19] j=0 [L19] COND TRUE j<20 [L20] ad1[j].a = __VERIFIER_nondet_int() [L21] ad1[j].b = __VERIFIER_nondet_int() [L19] j++ [L19] COND FALSE !(j<20) [L23] i = __VERIFIER_nondet_int() [L24] COND TRUE i >= 0 && i < 10 [L25] ad2 = ad1 [L26] ad1[i].a = i [L27] pa = &ad1[i].a [L28] EXPR ad2[i].a [L28] i = ad2[i].a + 10 [L29] EXPR \read(*pa) [L29] COND FALSE !(i < *pa) [L32] CALL, EXPR check(ad1, i) [L12] EXPR ad1[b].a [L12] return ad1[b].a == b; [L32] RET, EXPR check(ad1, i) [L32] COND TRUE !check(ad1, i) [L39] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 73 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 121 SDtfs, 20 SDslu, 52 SDs, 0 SdLazy, 121 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 8 StatesRemovedByMinimization, 1 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...