/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/nla-digbench/cohencu.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:19:31,805 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:19:31,808 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:19:31,864 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:19:31,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:19:31,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:19:31,874 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:19:31,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:19:31,883 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:19:31,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:19:31,891 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:19:31,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:19:31,893 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:19:31,896 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:19:31,900 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:19:31,902 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:19:31,903 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:19:31,908 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:19:31,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:19:31,924 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:19:31,928 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:19:31,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:19:31,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:19:31,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:19:31,945 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:19:31,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:19:31,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:19:31,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:19:31,967 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:19:31,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:19:31,968 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:19:31,969 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:19:31,970 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:19:31,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:19:31,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:19:31,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:19:31,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:19:31,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:19:31,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:19:31,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:19:31,975 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:19:31,976 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 15:19:32,027 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:19:32,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:19:32,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:19:32,030 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:19:32,030 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:19:32,030 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:19:32,031 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:19:32,031 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:19:32,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:19:32,033 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:19:32,034 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:19:32,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:19:32,035 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:19:32,035 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:19:32,035 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:19:32,035 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:19:32,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:19:32,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:19:32,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:19:32,036 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:19:32,037 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:19:32,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:19:32,037 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:19:32,038 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:19:32,038 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:19:32,038 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:19:32,038 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:19:32,039 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:19:32,039 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:19:32,039 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:19:32,463 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:19:32,498 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:19:32,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:19:32,504 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:19:32,505 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:19:32,506 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohencu.c [2020-10-28 15:19:32,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3325ce6c/04cf02e3a8b54171bd9c6c98dfa8b97f/FLAG04d0a94bb [2020-10-28 15:19:33,181 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:19:33,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/cohencu.c [2020-10-28 15:19:33,190 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3325ce6c/04cf02e3a8b54171bd9c6c98dfa8b97f/FLAG04d0a94bb [2020-10-28 15:19:33,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f3325ce6c/04cf02e3a8b54171bd9c6c98dfa8b97f [2020-10-28 15:19:33,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:19:33,567 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:19:33,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:19:33,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:19:33,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:19:33,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:19:33" (1/1) ... [2020-10-28 15:19:33,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38d5935a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:33, skipping insertion in model container [2020-10-28 15:19:33,583 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:19:33" (1/1) ... [2020-10-28 15:19:33,593 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:19:33,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:19:33,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:19:33,821 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:19:33,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:19:33,866 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:19:33,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:33 WrapperNode [2020-10-28 15:19:33,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:19:33,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:19:33,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:19:33,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:19:33,882 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:33" (1/1) ... [2020-10-28 15:19:33,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:33" (1/1) ... [2020-10-28 15:19:33,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:33" (1/1) ... [2020-10-28 15:19:33,892 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:33" (1/1) ... [2020-10-28 15:19:33,899 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:33" (1/1) ... [2020-10-28 15:19:33,904 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:33" (1/1) ... [2020-10-28 15:19:33,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:33" (1/1) ... [2020-10-28 15:19:33,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:19:33,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:19:33,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:19:33,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:19:33,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-28 15:19:34,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:19:34,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:19:34,001 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:19:34,001 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:19:34,002 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:19:34,003 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:19:34,003 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:19:34,004 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:19:34,004 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:19:34,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:19:34,006 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:19:34,006 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:19:34,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:19:34,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:19:34,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:19:34,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:19:34,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:19:34,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:19:34,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:19:34,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:19:34,545 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:19:34,545 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 15:19:34,547 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:19:34 BoogieIcfgContainer [2020-10-28 15:19:34,547 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:19:34,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:19:34,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:19:34,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:19:34,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:19:33" (1/3) ... [2020-10-28 15:19:34,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6622a725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:19:34, skipping insertion in model container [2020-10-28 15:19:34,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:19:33" (2/3) ... [2020-10-28 15:19:34,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6622a725 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:19:34, skipping insertion in model container [2020-10-28 15:19:34,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:19:34" (3/3) ... [2020-10-28 15:19:34,561 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu.c [2020-10-28 15:19:34,575 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:19:34,580 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:19:34,599 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:19:34,643 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:19:34,644 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:19:34,644 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:19:34,644 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:19:34,644 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:19:34,644 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:19:34,644 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:19:34,645 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:19:34,668 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-28 15:19:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:19:34,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:34,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:34,680 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:34,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:34,690 INFO L82 PathProgramCache]: Analyzing trace with hash 2014850862, now seen corresponding path program 1 times [2020-10-28 15:19:34,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:34,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895504059] [2020-10-28 15:19:34,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:34,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:34,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:34,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:35,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:35,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:19:35,262 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:19:35,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-28 15:19:35,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:35,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:35,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:35,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:19:35,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:35,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:19:35,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:35,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:35,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:35,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:35,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:35,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 15:19:35,406 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:35,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:35,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:35,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:35,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:35,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:19:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:19:35,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895504059] [2020-10-28 15:19:35,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:19:35,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:19:35,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301280969] [2020-10-28 15:19:35,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:19:35,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:35,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:19:35,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:19:35,446 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-28 15:19:35,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:35,729 INFO L93 Difference]: Finished difference Result 58 states and 96 transitions. [2020-10-28 15:19:35,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:19:35,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-28 15:19:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:35,746 INFO L225 Difference]: With dead ends: 58 [2020-10-28 15:19:35,746 INFO L226 Difference]: Without dead ends: 26 [2020-10-28 15:19:35,752 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 [2020-10-28 15:19:35,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-10-28 15:19:35,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-10-28 15:19:35,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-10-28 15:19:35,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2020-10-28 15:19:35,848 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 12 [2020-10-28 15:19:35,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:35,849 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2020-10-28 15:19:35,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:19:35,849 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2020-10-28 15:19:35,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-28 15:19:35,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:35,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:35,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:19:35,851 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:35,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:35,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1662065840, now seen corresponding path program 1 times [2020-10-28 15:19:35,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:35,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471653147] [2020-10-28 15:19:35,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:35,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:36,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:36,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 15:19:36,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:36,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-10-28 15:19:36,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:36,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:36,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 15:19:36,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 15:19:36,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:19:36,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:36,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:19:36,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:19:36,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:19:36,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:19:36,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:19:36,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:19:36,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 15:19:36,165 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:19:36,165 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:19:36,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:19:36,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:19:36,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:19:36,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:19:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:19:36,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471653147] [2020-10-28 15:19:36,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:19:36,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 15:19:36,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702695301] [2020-10-28 15:19:36,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 15:19:36,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:19:36,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 15:19:36,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 15:19:36,178 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand 6 states. [2020-10-28 15:19:36,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:19:36,495 INFO L93 Difference]: Finished difference Result 33 states and 42 transitions. [2020-10-28 15:19:36,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 15:19:36,496 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-10-28 15:19:36,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:19:36,497 INFO L225 Difference]: With dead ends: 33 [2020-10-28 15:19:36,498 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 15:19:36,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:19:36,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 15:19:36,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 15:19:36,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 15:19:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2020-10-28 15:19:36,515 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2020-10-28 15:19:36,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:19:36,515 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2020-10-28 15:19:36,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 15:19:36,516 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2020-10-28 15:19:36,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-28 15:19:36,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:19:36,517 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:19:36,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:19:36,517 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:19:36,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:19:36,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1159751394, now seen corresponding path program 1 times [2020-10-28 15:19:36,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:19:36,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952376892] [2020-10-28 15:19:36,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:19:36,550 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-28 15:19:36,550 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-28 15:19:36,550 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-28 15:19:36,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:19:36,570 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-28 15:19:36,571 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 03:19:36 BoogieIcfgContainer [2020-10-28 15:19:36,571 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-28 15:19:36,575 INFO L168 Benchmark]: Toolchain (without parser) took 3012.20 ms. Allocated memory is still 151.0 MB. Free memory was 126.0 MB in the beginning and 130.7 MB in the end (delta: -4.7 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 15:19:36,576 INFO L168 Benchmark]: CDTParser took 0.57 ms. Allocated memory is still 151.0 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 15:19:36,578 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.09 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 115.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-28 15:19:36,579 INFO L168 Benchmark]: Boogie Preprocessor took 40.94 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 113.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-28 15:19:36,580 INFO L168 Benchmark]: RCFGBuilder took 637.46 ms. Allocated memory is still 151.0 MB. Free memory was 113.7 MB in the beginning and 98.7 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2020-10-28 15:19:36,582 INFO L168 Benchmark]: TraceAbstraction took 2019.36 ms. Allocated memory is still 151.0 MB. Free memory was 98.4 MB in the beginning and 130.7 MB in the end (delta: -32.3 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 15:19:36,591 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.57 ms. Allocated memory is still 151.0 MB. Free memory is still 123.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 295.09 ms. Allocated memory is still 151.0 MB. Free memory was 125.2 MB in the beginning and 115.1 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 40.94 ms. Allocated memory is still 151.0 MB. Free memory was 115.1 MB in the beginning and 113.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 637.46 ms. Allocated memory is still 151.0 MB. Free memory was 113.7 MB in the beginning and 98.7 MB in the end (delta: 15.0 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2019.36 ms. Allocated memory is still 151.0 MB. Free memory was 98.4 MB in the beginning and 130.7 MB in the end (delta: -32.3 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 8]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L23] int a, n, x, y, z; [L24] a = __VERIFIER_nondet_int() [L25] n = 0 [L26] x = 0 [L27] y = 1 [L28] z = 6 [L30] COND TRUE 1 [L31] CALL __VERIFIER_assert(z == 6 * n + 6) [L15] COND FALSE !(!(cond)) [L31] RET __VERIFIER_assert(z == 6 * n + 6) [L32] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) [L15] COND TRUE !(cond) [L17] CALL reach_error() [L8] __assert_fail("0", "cohencu.c", 8, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 1.9s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 50 SDtfs, 28 SDslu, 42 SDs, 0 SdLazy, 85 SolverSat, 49 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 22 ConstructedInterpolants, 0 QuantifiedInterpolants, 1254 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...