/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:45:46,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:45:46,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:45:47,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:45:47,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:45:47,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:45:47,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:45:47,027 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:45:47,029 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:45:47,031 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:45:47,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:45:47,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:45:47,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:45:47,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:45:47,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:45:47,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:45:47,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:45:47,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:45:47,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:45:47,056 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:45:47,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:45:47,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:45:47,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:45:47,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:45:47,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 22:45:47,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 22:45:47,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 22:45:47,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 22:45:47,084 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 22:45:47,086 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 22:45:47,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:45:47,087 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:45:47,088 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:45:47,089 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:45:47,091 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:45:47,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:45:47,092 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:45:47,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:45:47,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:45:47,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:45:47,095 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:45:47,096 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-06 22:45:47,150 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:45:47,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:45:47,155 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:45:47,155 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:45:47,156 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:45:47,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:45:47,156 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:45:47,156 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:45:47,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:45:47,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:45:47,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:45:47,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:45:47,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:45:47,158 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:45:47,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:45:47,159 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:45:47,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:45:47,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:45:47,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:45:47,160 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:45:47,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:45:47,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:45:47,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:45:47,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:45:47,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:45:47,161 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:45:47,161 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:45:47,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:45:47,162 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:45:47,162 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:45:47,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:45:47,581 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:45:47,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:45:47,587 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:45:47,588 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:45:47,589 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-11-06 22:45:47,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42a27ee25/f80970a57bf443949498e84f61c827cc/FLAG804cc00fe [2020-11-06 22:45:48,342 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:45:48,342 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/underapprox_1-1.c [2020-11-06 22:45:48,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42a27ee25/f80970a57bf443949498e84f61c827cc/FLAG804cc00fe [2020-11-06 22:45:48,712 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/42a27ee25/f80970a57bf443949498e84f61c827cc [2020-11-06 22:45:48,716 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:45:48,729 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:45:48,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:48,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:45:48,736 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:45:48,737 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:48" (1/1) ... [2020-11-06 22:45:48,742 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@779d7891 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:48, skipping insertion in model container [2020-11-06 22:45:48,742 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:45:48" (1/1) ... [2020-11-06 22:45:48,753 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:45:48,778 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:45:48,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:48,980 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:45:48,995 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:45:49,018 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:45:49,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:49 WrapperNode [2020-11-06 22:45:49,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:45:49,021 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:45:49,021 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:45:49,021 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:45:49,034 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:49" (1/1) ... [2020-11-06 22:45:49,037 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:49" (1/1) ... [2020-11-06 22:45:49,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:49" (1/1) ... [2020-11-06 22:45:49,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:49" (1/1) ... [2020-11-06 22:45:49,051 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:49" (1/1) ... [2020-11-06 22:45:49,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:49" (1/1) ... [2020-11-06 22:45:49,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:49" (1/1) ... [2020-11-06 22:45:49,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:45:49,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:45:49,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:45:49,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:45:49,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:49" (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 [2020-11-06 22:45:49,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:45:49,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:45:49,132 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:45:49,133 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-06 22:45:49,133 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:45:49,133 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:45:49,133 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:45:49,133 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:45:49,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:45:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-06 22:45:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:45:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:45:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:45:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:45:49,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:45:49,135 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:45:49,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:45:49,523 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:45:49,524 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-11-06 22:45:49,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:49 BoogieIcfgContainer [2020-11-06 22:45:49,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:45:49,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:45:49,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:45:49,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:45:49,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:45:48" (1/3) ... [2020-11-06 22:45:49,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57aa4930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:49, skipping insertion in model container [2020-11-06 22:45:49,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:45:49" (2/3) ... [2020-11-06 22:45:49,534 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57aa4930 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:45:49, skipping insertion in model container [2020-11-06 22:45:49,534 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:45:49" (3/3) ... [2020-11-06 22:45:49,536 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_1-1.c [2020-11-06 22:45:49,556 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:45:49,560 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:45:49,574 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:45:49,603 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:45:49,603 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:45:49,603 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:45:49,603 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:45:49,603 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:45:49,604 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:45:49,604 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:45:49,604 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:45:49,625 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-11-06 22:45:49,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:45:49,631 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:49,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:49,633 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:49,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:49,640 INFO L82 PathProgramCache]: Analyzing trace with hash 783588435, now seen corresponding path program 1 times [2020-11-06 22:45:49,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:49,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778698190] [2020-11-06 22:45:49,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:49,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:49,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778698190] [2020-11-06 22:45:49,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:49,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:45:49,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368908039] [2020-11-06 22:45:49,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:45:49,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:49,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:45:49,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:45:49,963 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-11-06 22:45:50,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:50,049 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-11-06 22:45:50,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:45:50,051 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-11-06 22:45:50,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:50,059 INFO L225 Difference]: With dead ends: 34 [2020-11-06 22:45:50,059 INFO L226 Difference]: Without dead ends: 13 [2020-11-06 22:45:50,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:45:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-11-06 22:45:50,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-11-06 22:45:50,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-06 22:45:50,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-11-06 22:45:50,105 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 12 [2020-11-06 22:45:50,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:50,105 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-11-06 22:45:50,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:45:50,106 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-11-06 22:45:50,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-06 22:45:50,106 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:50,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:50,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:45:50,107 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:50,108 INFO L82 PathProgramCache]: Analyzing trace with hash 669071831, now seen corresponding path program 1 times [2020-11-06 22:45:50,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:50,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959682304] [2020-11-06 22:45:50,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:50,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:50,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:50,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959682304] [2020-11-06 22:45:50,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:45:50,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:45:50,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919413661] [2020-11-06 22:45:50,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:45:50,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:50,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:45:50,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:45:50,246 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-11-06 22:45:50,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:50,336 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2020-11-06 22:45:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:45:50,337 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-11-06 22:45:50,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:50,338 INFO L225 Difference]: With dead ends: 20 [2020-11-06 22:45:50,338 INFO L226 Difference]: Without dead ends: 14 [2020-11-06 22:45:50,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:45:50,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-06 22:45:50,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-06 22:45:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-06 22:45:50,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-11-06 22:45:50,352 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-11-06 22:45:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:50,353 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-11-06 22:45:50,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:45:50,353 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-11-06 22:45:50,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-06 22:45:50,354 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:50,354 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:50,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:45:50,354 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:50,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:50,355 INFO L82 PathProgramCache]: Analyzing trace with hash 396678398, now seen corresponding path program 1 times [2020-11-06 22:45:50,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:50,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47681160] [2020-11-06 22:45:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:50,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:50,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47681160] [2020-11-06 22:45:50,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413171600] [2020-11-06 22:45:50,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:50,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-06 22:45:50,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:50,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:50,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2020-11-06 22:45:50,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710533292] [2020-11-06 22:45:50,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:45:50,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:50,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:45:50,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:45:50,594 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2020-11-06 22:45:50,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:50,716 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-11-06 22:45:50,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:45:50,717 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-06 22:45:50,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:50,718 INFO L225 Difference]: With dead ends: 21 [2020-11-06 22:45:50,718 INFO L226 Difference]: Without dead ends: 15 [2020-11-06 22:45:50,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:45:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-06 22:45:50,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-11-06 22:45:50,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-06 22:45:50,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-11-06 22:45:50,726 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2020-11-06 22:45:50,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:50,726 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-11-06 22:45:50,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:45:50,726 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-11-06 22:45:50,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-06 22:45:50,727 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:50,727 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:50,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:45:50,941 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:50,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:50,943 INFO L82 PathProgramCache]: Analyzing trace with hash 542416567, now seen corresponding path program 2 times [2020-11-06 22:45:50,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:50,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433465312] [2020-11-06 22:45:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:51,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:51,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:51,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:51,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433465312] [2020-11-06 22:45:51,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409121637] [2020-11-06 22:45:51,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:51,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-06 22:45:51,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:51,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-06 22:45:51,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:51,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:51,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:51,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2020-11-06 22:45:51,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994683959] [2020-11-06 22:45:51,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:45:51,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:51,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:45:51,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:45:51,272 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2020-11-06 22:45:51,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:51,441 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2020-11-06 22:45:51,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:45:51,442 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-11-06 22:45:51,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:51,443 INFO L225 Difference]: With dead ends: 22 [2020-11-06 22:45:51,443 INFO L226 Difference]: Without dead ends: 16 [2020-11-06 22:45:51,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:45:51,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-06 22:45:51,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-11-06 22:45:51,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-06 22:45:51,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-11-06 22:45:51,451 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-11-06 22:45:51,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:51,451 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-11-06 22:45:51,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:45:51,452 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-11-06 22:45:51,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:45:51,452 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:51,453 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:51,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:51,667 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:51,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:51,668 INFO L82 PathProgramCache]: Analyzing trace with hash 765332510, now seen corresponding path program 3 times [2020-11-06 22:45:51,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:51,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012940346] [2020-11-06 22:45:51,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:51,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:51,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:51,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:51,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012940346] [2020-11-06 22:45:51,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662396890] [2020-11-06 22:45:51,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:51,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-06 22:45:51,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:51,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-06 22:45:51,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:51,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:51,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2020-11-06 22:45:51,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520570238] [2020-11-06 22:45:51,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:45:51,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:51,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:45:51,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:45:51,947 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2020-11-06 22:45:52,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:52,187 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-11-06 22:45:52,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:45:52,188 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-11-06 22:45:52,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:52,189 INFO L225 Difference]: With dead ends: 23 [2020-11-06 22:45:52,189 INFO L226 Difference]: Without dead ends: 17 [2020-11-06 22:45:52,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-11-06 22:45:52,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-06 22:45:52,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-06 22:45:52,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-06 22:45:52,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-11-06 22:45:52,197 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2020-11-06 22:45:52,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:52,197 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-11-06 22:45:52,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:45:52,198 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-11-06 22:45:52,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:45:52,198 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:52,199 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:52,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:52,413 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:52,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:52,414 INFO L82 PathProgramCache]: Analyzing trace with hash -914207849, now seen corresponding path program 4 times [2020-11-06 22:45:52,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:52,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33715670] [2020-11-06 22:45:52,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:52,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:52,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:52,613 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:52,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33715670] [2020-11-06 22:45:52,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070001078] [2020-11-06 22:45:52,614 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:52,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-06 22:45:52,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:52,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-06 22:45:52,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:52,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:52,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:52,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2020-11-06 22:45:52,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245039749] [2020-11-06 22:45:52,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-06 22:45:52,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:52,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-06 22:45:52,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:45:52,725 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2020-11-06 22:45:52,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:52,991 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-11-06 22:45:52,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-06 22:45:52,992 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2020-11-06 22:45:52,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:52,992 INFO L225 Difference]: With dead ends: 24 [2020-11-06 22:45:52,993 INFO L226 Difference]: Without dead ends: 18 [2020-11-06 22:45:52,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:45:52,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-11-06 22:45:52,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-11-06 22:45:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-06 22:45:53,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2020-11-06 22:45:53,000 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2020-11-06 22:45:53,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:53,000 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2020-11-06 22:45:53,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-06 22:45:53,001 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2020-11-06 22:45:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-06 22:45:53,001 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:53,001 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:53,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:53,203 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:53,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:53,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1440351426, now seen corresponding path program 5 times [2020-11-06 22:45:53,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:53,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940131949] [2020-11-06 22:45:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:53,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:45:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:45:53,365 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:53,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940131949] [2020-11-06 22:45:53,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648725193] [2020-11-06 22:45:53,366 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-06 22:45:53,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-06 22:45:53,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-06 22:45:53,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-06 22:45:53,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:45:53,478 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:45:53,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:45:53,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2020-11-06 22:45:53,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240131202] [2020-11-06 22:45:53,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-06 22:45:53,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:45:53,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-06 22:45:53,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:45:53,481 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2020-11-06 22:45:53,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:45:53,827 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-11-06 22:45:53,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-06 22:45:53,827 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2020-11-06 22:45:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:45:53,828 INFO L225 Difference]: With dead ends: 25 [2020-11-06 22:45:53,828 INFO L226 Difference]: Without dead ends: 19 [2020-11-06 22:45:53,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-11-06 22:45:53,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-06 22:45:53,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-06 22:45:53,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-06 22:45:53,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-11-06 22:45:53,836 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2020-11-06 22:45:53,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:45:53,836 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-11-06 22:45:53,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-06 22:45:53,836 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-11-06 22:45:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-06 22:45:53,837 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:45:53,837 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:45:54,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-06 22:45:54,051 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:45:54,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:45:54,052 INFO L82 PathProgramCache]: Analyzing trace with hash -570933129, now seen corresponding path program 6 times [2020-11-06 22:45:54,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:45:54,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483307506] [2020-11-06 22:45:54,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:45:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:45:54,077 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:45:54,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:45:54,121 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:45:54,152 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:45:54,153 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:45:54,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 22:45:54,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:45:54 BoogieIcfgContainer [2020-11-06 22:45:54,210 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:45:54,213 INFO L168 Benchmark]: Toolchain (without parser) took 5493.44 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 131.1 MB in the beginning and 145.8 MB in the end (delta: -14.7 MB). Peak memory consumption was 17.8 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:54,213 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 156.2 MB. Free memory is still 128.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:45:54,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.97 ms. Allocated memory is still 156.2 MB. Free memory was 130.4 MB in the beginning and 121.5 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:54,216 INFO L168 Benchmark]: Boogie Preprocessor took 37.78 ms. Allocated memory is still 156.2 MB. Free memory was 121.5 MB in the beginning and 120.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:54,217 INFO L168 Benchmark]: RCFGBuilder took 466.32 ms. Allocated memory is still 156.2 MB. Free memory was 119.9 MB in the beginning and 107.9 MB in the end (delta: 12.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:45:54,223 INFO L168 Benchmark]: TraceAbstraction took 4682.08 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 107.5 MB in the beginning and 145.8 MB in the end (delta: -38.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:45:54,234 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 156.2 MB. Free memory is still 128.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 287.97 ms. Allocated memory is still 156.2 MB. Free memory was 130.4 MB in the beginning and 121.5 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 37.78 ms. Allocated memory is still 156.2 MB. Free memory was 121.5 MB in the beginning and 120.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 466.32 ms. Allocated memory is still 156.2 MB. Free memory was 119.9 MB in the beginning and 107.9 MB in the end (delta: 12.0 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 4682.08 ms. Allocated memory was 156.2 MB in the beginning and 187.7 MB in the end (delta: 31.5 MB). Free memory was 107.5 MB in the beginning and 145.8 MB in the end (delta: -38.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] unsigned int x = 0; [L14] unsigned int y = 1; VAL [x=0, y=1] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=1, y=2] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=2, y=4] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=3, y=8] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=4, y=16] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=5, y=32] [L16] COND TRUE x < 6 [L17] x++ [L18] y *= 2 VAL [x=6, y=64] [L16] COND FALSE !(x < 6) VAL [x=6, y=64] [L21] CALL __VERIFIER_assert(y != 64) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L7] CALL reach_error() [L3] __assert_fail("0", "underapprox_1-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.5s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 83 SDtfs, 45 SDslu, 159 SDs, 0 SdLazy, 251 SolverSat, 57 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 82 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 192 NumberOfCodeBlocks, 192 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 162 ConstructedInterpolants, 0 QuantifiedInterpolants, 8156 SizeOfPredicates, 5 NumberOfNonLiveVariables, 525 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 12 InterpolantComputations, 2 PerfectInterpolantSequences, 0/70 InterpolantCoveringCapability, 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...