/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:45:37,668 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:45:37,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:45:37,707 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 00:45:37,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 00:45:37,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 00:45:37,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 00:45:37,744 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 00:45:37,748 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 00:45:37,750 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 00:45:37,752 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 00:45:37,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 00:45:37,760 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 00:45:37,761 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 00:45:37,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 00:45:37,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 00:45:37,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-03 00:45:37,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:45:37,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:45:37,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:45:37,786 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:45:37,799 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:45:37,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:45:37,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:45:37,802 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:45:37,803 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:45:37,803 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:45:37,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:45:37,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:45:37,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:45:37,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:45:37,804 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:45:37,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:45:37,804 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:45:37,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:45:37,805 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:45:37,805 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:45:37,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:45:37,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:45:37,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:45:37,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:45:37,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:45:37,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:45:37,805 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:45:37,806 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:45:38,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:45:38,127 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:45:38,130 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:45:38,131 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:45:38,132 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:45:38,133 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound20.c [2021-05-03 00:45:38,206 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/624b1b7bb/13111ff04bb84aee868deac1e3d26c8e/FLAG48046cbd7 [2021-05-03 00:45:38,651 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:45:38,652 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound20.c [2021-05-03 00:45:38,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/624b1b7bb/13111ff04bb84aee868deac1e3d26c8e/FLAG48046cbd7 [2021-05-03 00:45:38,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/624b1b7bb/13111ff04bb84aee868deac1e3d26c8e [2021-05-03 00:45:38,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:45:38,687 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:45:38,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:45:38,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:45:38,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:45:38,696 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:45:38" (1/1) ... [2021-05-03 00:45:38,697 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a7beec9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:38, skipping insertion in model container [2021-05-03 00:45:38,697 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:45:38" (1/1) ... [2021-05-03 00:45:38,703 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:45:38,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:45:38,863 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound20.c[524,537] [2021-05-03 00:45:38,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:45:38,903 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:45:38,944 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_valuebound20.c[524,537] [2021-05-03 00:45:38,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:45:38,968 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:45:38,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:38 WrapperNode [2021-05-03 00:45:38,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:45:38,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:45:38,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:45:38,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:45:38,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:38" (1/1) ... [2021-05-03 00:45:38,985 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:38" (1/1) ... [2021-05-03 00:45:39,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:38" (1/1) ... [2021-05-03 00:45:39,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:38" (1/1) ... [2021-05-03 00:45:39,012 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:38" (1/1) ... [2021-05-03 00:45:39,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:38" (1/1) ... [2021-05-03 00:45:39,017 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:38" (1/1) ... [2021-05-03 00:45:39,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:45:39,020 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:45:39,020 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:45:39,020 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:45:39,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:38" (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 [2021-05-03 00:45:39,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:45:39,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:45:39,102 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:45:39,102 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:45:39,102 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:45:39,102 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:45:39,102 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:45:39,103 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:45:39,103 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:45:39,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:45:39,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:45:39,104 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:45:39,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:45:39,105 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:45:39,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:45:39,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:45:39,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:45:39,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:45:39,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:45:39,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:45:39,446 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:45:39,447 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:45:39,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:45:39 BoogieIcfgContainer [2021-05-03 00:45:39,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:45:39,450 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:45:39,450 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:45:39,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:45:39,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:45:38" (1/3) ... [2021-05-03 00:45:39,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6890d2b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:45:39, skipping insertion in model container [2021-05-03 00:45:39,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:45:38" (2/3) ... [2021-05-03 00:45:39,454 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6890d2b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:45:39, skipping insertion in model container [2021-05-03 00:45:39,454 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:45:39" (3/3) ... [2021-05-03 00:45:39,455 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_valuebound20.c [2021-05-03 00:45:39,464 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:45:39,467 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:45:39,482 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:45:39,500 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:45:39,500 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:45:39,500 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:45:39,501 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:45:39,501 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:45:39,501 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:45:39,501 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:45:39,501 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:45:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-03 00:45:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 00:45:39,522 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:45:39,523 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:45:39,523 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:45:39,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:45:39,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1738134960, now seen corresponding path program 1 times [2021-05-03 00:45:39,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:45:39,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079735510] [2021-05-03 00:45:39,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:45:39,585 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:45:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:39,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:45:39,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:39,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-03 00:45:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:39,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-03 00:45:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:39,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-03 00:45:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:45:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-03 00:45:39,759 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:45:39,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079735510] [2021-05-03 00:45:39,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2079735510] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:45:39,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:45:39,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:45:39,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526998545] [2021-05-03 00:45:39,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:45:39,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:45:39,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:45:39,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:45:39,777 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-03 00:45:39,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:45:39,868 INFO L93 Difference]: Finished difference Result 61 states and 88 transitions. [2021-05-03 00:45:39,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:45:39,870 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2021-05-03 00:45:39,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:45:39,875 INFO L225 Difference]: With dead ends: 61 [2021-05-03 00:45:39,875 INFO L226 Difference]: Without dead ends: 29 [2021-05-03 00:45:39,877 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:45:39,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-03 00:45:39,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-03 00:45:39,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-03 00:45:39,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-05-03 00:45:39,906 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 28 [2021-05-03 00:45:39,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:45:39,906 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-05-03 00:45:39,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-03 00:45:39,906 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-05-03 00:45:39,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-03 00:45:39,907 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:45:39,908 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:45:39,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:45:39,908 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:45:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:45:39,908 INFO L82 PathProgramCache]: Analyzing trace with hash 567203544, now seen corresponding path program 1 times [2021-05-03 00:45:39,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:45:39,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885856679] [2021-05-03 00:45:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:45:39,911 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:45:39,923 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:45:39,923 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:45:39,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:45:39,935 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:45:39,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:45:39 BoogieIcfgContainer [2021-05-03 00:45:39,935 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:45:39,936 INFO L168 Benchmark]: Toolchain (without parser) took 1249.28 ms. Allocated memory is still 211.8 MB. Free memory was 176.9 MB in the beginning and 184.9 MB in the end (delta: -8.0 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:45:39,937 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 211.8 MB. Free memory is still 193.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:45:39,937 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.84 ms. Allocated memory is still 211.8 MB. Free memory was 176.7 MB in the beginning and 194.5 MB in the end (delta: -17.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-03 00:45:39,937 INFO L168 Benchmark]: Boogie Preprocessor took 46.63 ms. Allocated memory is still 211.8 MB. Free memory was 194.5 MB in the beginning and 192.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-03 00:45:39,938 INFO L168 Benchmark]: RCFGBuilder took 428.53 ms. Allocated memory is still 211.8 MB. Free memory was 192.9 MB in the beginning and 176.8 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:45:39,938 INFO L168 Benchmark]: TraceAbstraction took 485.62 ms. Allocated memory is still 211.8 MB. Free memory was 176.1 MB in the beginning and 184.9 MB in the end (delta: -8.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:45:39,939 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 211.8 MB. Free memory is still 193.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 280.84 ms. Allocated memory is still 211.8 MB. Free memory was 176.7 MB in the beginning and 194.5 MB in the end (delta: -17.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.63 ms. Allocated memory is still 211.8 MB. Free memory was 194.5 MB in the beginning and 192.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 428.53 ms. Allocated memory is still 211.8 MB. Free memory was 192.9 MB in the beginning and 176.8 MB in the end (delta: 16.1 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 485.62 ms. Allocated memory is still 211.8 MB. Free memory was 176.1 MB in the beginning and 184.9 MB in the end (delta: -8.7 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L20] int x, y; [L21] long long a, b, p, q; [L23] x = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x>=0 && x<=20) [L9] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x>=0 && x<=20) [L25] y = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(y>=0 && y<=20) [L9] COND FALSE !(!cond) [L26] RET assume_abort_if_not(y>=0 && y<=20) [L27] CALL assume_abort_if_not(y >= 1) [L9] COND FALSE !(!cond) [L27] RET assume_abort_if_not(y >= 1) [L29] a = x [L30] b = y [L31] p = 1 [L32] q = 0 [L34] COND TRUE 1 [L35] CALL __VERIFIER_assert(q + a * b * p == (long long) x * y) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 428.4ms, OverallIterations: 2, TraceHistogramMax: 3, EmptinessCheckTime: 13.2ms, AutomataDifference: 110.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 34 SDtfs, 22 SDslu, 3 SDs, 0 SdLazy, 9 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 50.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, InterpolantAutomatonStates: 3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 19.6ms AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...