/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/loops-crafted-1/Mono4_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 11:42:08,298 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 11:42:08,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 11:42:08,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 11:42:08,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 11:42:08,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 11:42:08,422 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 11:42:08,426 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-06 11:42:08,434 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 11:42:08,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 11:42:08,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 11:42:08,435 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 11:42:08,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 11:42:08,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 11:42:08,436 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 11:42:08,436 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 11:42:08,436 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 11:42:08,436 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 11:42:08,436 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 11:42:08,437 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 11:42:08,437 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 11:42:08,437 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 11:42:08,437 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 11:42:08,437 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 11:42:08,437 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 11:42:08,438 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 11:42:08,438 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 11:42:08,438 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 11:42:08,438 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-06 11:42:08,438 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 11:42:08,438 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-06 11:42:08,438 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 11:42:08,703 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 11:42:08,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 11:42:08,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 11:42:08,722 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 11:42:08,723 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 11:42:08,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2021-05-06 11:42:08,771 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0525c5d26/5dabf42b826b457db835d95cc8094fcb/FLAG200f6f023 [2021-05-06 11:42:09,221 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 11:42:09,221 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c [2021-05-06 11:42:09,226 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0525c5d26/5dabf42b826b457db835d95cc8094fcb/FLAG200f6f023 [2021-05-06 11:42:09,632 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0525c5d26/5dabf42b826b457db835d95cc8094fcb [2021-05-06 11:42:09,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 11:42:09,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 11:42:09,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 11:42:09,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 11:42:09,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 11:42:09,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:42:09" (1/1) ... [2021-05-06 11:42:09,657 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25fd853b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:42:09, skipping insertion in model container [2021-05-06 11:42:09,657 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 11:42:09" (1/1) ... [2021-05-06 11:42:09,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 11:42:09,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 11:42:09,781 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c[311,324] [2021-05-06 11:42:09,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:42:09,796 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 11:42:09,806 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono4_1.c[311,324] [2021-05-06 11:42:09,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 11:42:09,819 INFO L208 MainTranslator]: Completed translation [2021-05-06 11:42:09,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:42:09 WrapperNode [2021-05-06 11:42:09,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 11:42:09,821 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 11:42:09,821 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 11:42:09,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 11:42:09,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:42:09" (1/1) ... [2021-05-06 11:42:09,828 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:42:09" (1/1) ... [2021-05-06 11:42:09,833 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:42:09" (1/1) ... [2021-05-06 11:42:09,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:42:09" (1/1) ... [2021-05-06 11:42:09,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:42:09" (1/1) ... [2021-05-06 11:42:09,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:42:09" (1/1) ... [2021-05-06 11:42:09,840 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:42:09" (1/1) ... [2021-05-06 11:42:09,841 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 11:42:09,842 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 11:42:09,842 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 11:42:09,843 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 11:42:09,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:42:09" (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 [2021-05-06 11:42:09,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 11:42:09,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 11:42:09,944 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 11:42:09,944 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 11:42:09,944 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 11:42:09,945 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 11:42:09,945 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 11:42:09,945 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 11:42:09,945 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 11:42:09,945 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 11:42:09,945 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 11:42:09,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 11:42:09,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 11:42:09,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 11:42:09,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 11:42:09,945 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 11:42:09,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 11:42:10,125 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 11:42:10,126 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 11:42:10,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:42:10 BoogieIcfgContainer [2021-05-06 11:42:10,127 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 11:42:10,128 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 11:42:10,128 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 11:42:10,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 11:42:10,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 11:42:09" (1/3) ... [2021-05-06 11:42:10,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1f6b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:42:10, skipping insertion in model container [2021-05-06 11:42:10,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 11:42:09" (2/3) ... [2021-05-06 11:42:10,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a1f6b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 11:42:10, skipping insertion in model container [2021-05-06 11:42:10,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 11:42:10" (3/3) ... [2021-05-06 11:42:10,132 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono4_1.c [2021-05-06 11:42:10,137 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-06 11:42:10,140 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 11:42:10,154 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 11:42:10,170 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 11:42:10,170 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 11:42:10,170 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-06 11:42:10,171 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 11:42:10,171 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 11:42:10,171 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 11:42:10,171 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 11:42:10,171 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 11:42:10,182 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-06 11:42:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:42:10,188 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:42:10,188 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:42:10,189 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:42:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:42:10,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 1 times [2021-05-06 11:42:10,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:42:10,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502268197] [2021-05-06 11:42:10,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:42:10,248 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:42:10,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:42:10,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:42:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:42:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:42:10,437 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:42:10,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502268197] [2021-05-06 11:42:10,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1502268197] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:42:10,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:42:10,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 11:42:10,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076408273] [2021-05-06 11:42:10,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 11:42:10,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:42:10,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 11:42:10,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:42:10,477 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:42:10,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:42:10,568 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-06 11:42:10,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 11:42:10,570 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 11:42:10,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:42:10,575 INFO L225 Difference]: With dead ends: 32 [2021-05-06 11:42:10,576 INFO L226 Difference]: Without dead ends: 13 [2021-05-06 11:42:10,578 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 11:42:10,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-06 11:42:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-06 11:42:10,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:42:10,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-05-06 11:42:10,613 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-05-06 11:42:10,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:42:10,614 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-05-06 11:42:10,614 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:42:10,614 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-05-06 11:42:10,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-06 11:42:10,615 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:42:10,615 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:42:10,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 11:42:10,616 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:42:10,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:42:10,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 1 times [2021-05-06 11:42:10,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:42:10,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441800464] [2021-05-06 11:42:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:42:10,627 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-06 11:42:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:42:10,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:42:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:42:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:42:10,760 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:42:10,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441800464] [2021-05-06 11:42:10,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [441800464] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:42:10,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:42:10,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-06 11:42:10,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362712529] [2021-05-06 11:42:10,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-06 11:42:10,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:42:10,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-06 11:42:10,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-06 11:42:10,762 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:42:10,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:42:10,846 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-05-06 11:42:10,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-06 11:42:10,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-06 11:42:10,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:42:10,849 INFO L225 Difference]: With dead ends: 22 [2021-05-06 11:42:10,849 INFO L226 Difference]: Without dead ends: 15 [2021-05-06 11:42:10,850 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-06 11:42:10,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-06 11:42:10,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-06 11:42:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:42:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-06 11:42:10,855 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-05-06 11:42:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:42:10,856 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-06 11:42:10,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:42:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-06 11:42:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-06 11:42:10,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:42:10,856 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:42:10,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 11:42:10,857 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:42:10,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:42:10,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1372110560, now seen corresponding path program 1 times [2021-05-06 11:42:10,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:42:10,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1807587211] [2021-05-06 11:42:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:42:10,911 WARN L240 tifierPushTermWalker]: treesize reduction 3, result has 92.9 percent of original size [2021-05-06 11:42:10,917 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:42:10,932 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:42:10,954 WARN L245 tifierPushTermWalker]: treesize reduction 3, result has 92.9 percent of original size 39 [2021-05-06 11:42:10,966 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:42:10,970 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2021-05-06 11:42:10,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:42:11,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 11:42:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 11:42:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 11:42:11,126 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-06 11:42:11,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1807587211] [2021-05-06 11:42:11,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1807587211] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 11:42:11,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 11:42:11,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 11:42:11,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711848268] [2021-05-06 11:42:11,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 11:42:11,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-06 11:42:11,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 11:42:11,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-06 11:42:11,129 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:42:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 11:42:11,247 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-05-06 11:42:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 11:42:11,248 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-06 11:42:11,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 11:42:11,249 INFO L225 Difference]: With dead ends: 22 [2021-05-06 11:42:11,249 INFO L226 Difference]: Without dead ends: 17 [2021-05-06 11:42:11,249 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-06 11:42:11,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-06 11:42:11,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-05-06 11:42:11,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:42:11,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-05-06 11:42:11,260 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2021-05-06 11:42:11,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 11:42:11,260 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-05-06 11:42:11,260 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-06 11:42:11,261 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-05-06 11:42:11,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-06 11:42:11,261 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 11:42:11,261 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 11:42:11,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-06 11:42:11,261 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 11:42:11,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 11:42:11,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1059749499, now seen corresponding path program 1 times [2021-05-06 11:42:11,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-06 11:42:11,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556644461] [2021-05-06 11:42:11,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 11:42:11,282 WARN L240 tifierPushTermWalker]: treesize reduction 3, result has 92.9 percent of original size [2021-05-06 11:42:11,292 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:42:11,300 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:42:11,311 WARN L245 tifierPushTermWalker]: treesize reduction 3, result has 92.9 percent of original size 39 [2021-05-06 11:42:11,320 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:42:11,344 WARN L240 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size [2021-05-06 11:42:11,348 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:42:11,358 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:42:11,376 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 31 [2021-05-06 11:42:11,380 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 21 [2021-05-06 11:42:11,414 WARN L245 tifierPushTermWalker]: treesize reduction 4, result has 93.8 percent of original size 60 [2021-05-06 11:42:11,433 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:42:11,435 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:42:11,445 WARN L240 tifierPushTermWalker]: treesize reduction 17, result has 69.6 percent of original size [2021-05-06 11:42:11,447 WARN L240 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size [2021-05-06 11:42:11,454 WARN L245 tifierPushTermWalker]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-05-06 11:42:11,470 WARN L245 tifierPushTermWalker]: treesize reduction 17, result has 69.6 percent of original size 39 [2021-05-06 11:42:11,479 INFO L73 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2021-05-06 11:42:11,483 INFO L212 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2021-05-06 11:42:11,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 11:42:11,512 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 11:42:11,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-06 11:42:11,534 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-06 11:42:11,554 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-05-06 11:42:11,554 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-06 11:42:11,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-06 11:42:11,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 11:42:11 BoogieIcfgContainer [2021-05-06 11:42:11,568 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 11:42:11,569 INFO L168 Benchmark]: Toolchain (without parser) took 1933.34 ms. Allocated memory is still 206.6 MB. Free memory was 172.7 MB in the beginning and 115.3 MB in the end (delta: 57.5 MB). Peak memory consumption was 58.8 MB. Max. memory is 8.0 GB. [2021-05-06 11:42:11,571 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 206.6 MB. Free memory was 189.4 MB in the beginning and 189.2 MB in the end (delta: 104.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 11:42:11,572 INFO L168 Benchmark]: CACSL2BoogieTranslator took 181.08 ms. Allocated memory is still 206.6 MB. Free memory was 172.5 MB in the beginning and 163.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-06 11:42:11,572 INFO L168 Benchmark]: Boogie Preprocessor took 20.69 ms. Allocated memory is still 206.6 MB. Free memory was 163.3 MB in the beginning and 161.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 11:42:11,574 INFO L168 Benchmark]: RCFGBuilder took 284.79 ms. Allocated memory is still 206.6 MB. Free memory was 161.9 MB in the beginning and 179.4 MB in the end (delta: -17.5 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. [2021-05-06 11:42:11,575 INFO L168 Benchmark]: TraceAbstraction took 1439.97 ms. Allocated memory is still 206.6 MB. Free memory was 178.7 MB in the beginning and 115.3 MB in the end (delta: 63.5 MB). Peak memory consumption was 64.0 MB. Max. memory is 8.0 GB. [2021-05-06 11:42:11,580 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 206.6 MB. Free memory was 189.4 MB in the beginning and 189.2 MB in the end (delta: 104.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 181.08 ms. Allocated memory is still 206.6 MB. Free memory was 172.5 MB in the beginning and 163.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 20.69 ms. Allocated memory is still 206.6 MB. Free memory was 163.3 MB in the beginning and 161.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 284.79 ms. Allocated memory is still 206.6 MB. Free memory was 161.9 MB in the beginning and 179.4 MB in the end (delta: -17.5 MB). Peak memory consumption was 4.3 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1439.97 ms. Allocated memory is still 206.6 MB. Free memory was 178.7 MB in the beginning and 115.3 MB in the end (delta: 63.5 MB). Peak memory consumption was 64.0 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 4]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L7] int x = 0; [L8] int y = 500000; [L9] COND TRUE x < 1000000 [L10] COND TRUE x < 500000 [L11] x = x + 1 [L9] COND TRUE x < 1000000 [L10] COND FALSE !(x < 500000) [L13] x = x + 1 [L14] y = y + 1 [L9] COND FALSE !(x < 1000000) [L17] CALL __VERIFIER_assert(y!=x) [L4] COND TRUE !(cond) [L4] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1388.2ms, OverallIterations: 4, TraceHistogramMax: 2, EmptinessCheckTime: 10.5ms, AutomataDifference: 344.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 40 SDtfs, 32 SDslu, 17 SDs, 0 SdLazy, 33 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 94.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 247.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 38.9ms AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...