/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=0.4 --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 -i ../../../trunk/examples/svcomp/nla-digbench/cohencu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:39:33,683 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:39:33,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:39:33,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:39:33,726 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:39:33,734 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:39:33,736 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:39:33,739 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:39:33,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:39:33,746 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:39:33,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:39:33,749 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:39:33,749 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:39:33,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:39:33,754 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:39:33,756 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:39:33,757 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:39:33,758 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:39:33,759 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:39:33,760 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:39:33,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:39:33,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:39:33,763 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:39:33,764 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:39:33,766 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:39:33,766 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:39:33,767 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:39:33,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:39:33,768 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:39:33,769 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:39:33,769 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:39:33,770 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:39:33,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:39:33,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:39:33,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:39:33,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:39:33,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:39:33,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:39:33,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:39:33,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:39:33,774 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:39:33,775 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 [2020-10-14 05:39:33,799 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:39:33,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:39:33,800 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:39:33,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:39:33,801 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:39:33,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:39:33,801 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:39:33,801 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:39:33,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:39:33,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:39:33,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:39:33,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:39:33,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:39:33,803 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:39:33,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:39:33,803 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:39:33,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:39:33,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:39:33,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:39:33,804 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:39:33,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:39:33,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:39:33,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:39:33,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:39:33,805 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:39:33,805 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:39:33,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:39:33,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:39:33,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:39:33,806 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=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=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:39:34,091 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:39:34,104 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:39:34,109 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:39:34,110 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:39:34,110 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:39:34,111 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohencu.c [2020-10-14 05:39:34,192 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f32053663/931df53440364d1fa580f0e4d47a09d3/FLAGeb2864a91 [2020-10-14 05:39:34,669 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:39:34,669 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/cohencu.c [2020-10-14 05:39:34,685 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f32053663/931df53440364d1fa580f0e4d47a09d3/FLAGeb2864a91 [2020-10-14 05:39:34,987 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f32053663/931df53440364d1fa580f0e4d47a09d3 [2020-10-14 05:39:34,998 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:39:35,000 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:39:35,002 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:39:35,002 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:39:35,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:39:35,009 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:39:34" (1/1) ... [2020-10-14 05:39:35,013 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73fa4179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:35, skipping insertion in model container [2020-10-14 05:39:35,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:39:34" (1/1) ... [2020-10-14 05:39:35,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:39:35,043 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:39:35,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:39:35,233 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:39:35,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:39:35,272 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:39:35,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:35 WrapperNode [2020-10-14 05:39:35,273 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:39:35,273 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:39:35,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:39:35,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:39:35,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:35" (1/1) ... [2020-10-14 05:39:35,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:35" (1/1) ... [2020-10-14 05:39:35,370 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:35" (1/1) ... [2020-10-14 05:39:35,371 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:35" (1/1) ... [2020-10-14 05:39:35,375 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:35" (1/1) ... [2020-10-14 05:39:35,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:35" (1/1) ... [2020-10-14 05:39:35,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:35" (1/1) ... [2020-10-14 05:39:35,385 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:39:35,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:39:35,386 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:39:35,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:39:35,387 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:35" (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 [2020-10-14 05:39:35,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:39:35,454 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:39:35,454 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 05:39:35,454 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:39:35,454 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:39:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:39:35,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-14 05:39:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 05:39:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 05:39:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:39:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:39:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:39:35,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:39:35,830 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:39:35,830 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:39:35,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:39:35 BoogieIcfgContainer [2020-10-14 05:39:35,835 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:39:35,836 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:39:35,836 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:39:35,839 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:39:35,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:39:34" (1/3) ... [2020-10-14 05:39:35,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f13542a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:39:35, skipping insertion in model container [2020-10-14 05:39:35,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:39:35" (2/3) ... [2020-10-14 05:39:35,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f13542a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:39:35, skipping insertion in model container [2020-10-14 05:39:35,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:39:35" (3/3) ... [2020-10-14 05:39:35,843 INFO L109 eAbstractionObserver]: Analyzing ICFG cohencu.c [2020-10-14 05:39:35,851 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:39:35,859 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:39:35,873 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:39:35,898 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:39:35,898 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:39:35,898 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:39:35,898 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:39:35,898 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:39:35,899 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:39:35,899 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:39:35,899 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:39:35,914 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-14 05:39:35,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:39:35,920 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:35,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:39:35,922 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:35,929 INFO L82 PathProgramCache]: Analyzing trace with hash 378202346, now seen corresponding path program 1 times [2020-10-14 05:39:35,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:35,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751197858] [2020-10-14 05:39:35,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:36,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:36,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:36,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:36,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:39:36,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:39:36,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-14 05:39:36,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:36,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:36,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:36,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:39:36,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:36,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:39:36,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:39:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:36,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:36,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:36,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:39:36,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:36,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:39:36,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:36,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:36,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:36,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:36,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:39:36,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751197858] [2020-10-14 05:39:36,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:39:36,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:39:36,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827076665] [2020-10-14 05:39:36,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:39:36,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:39:36,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:39:36,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:39:36,218 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-10-14 05:39:36,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:39:36,244 INFO L93 Difference]: Finished difference Result 53 states and 90 transitions. [2020-10-14 05:39:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:39:36,246 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-14 05:39:36,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:39:36,255 INFO L225 Difference]: With dead ends: 53 [2020-10-14 05:39:36,256 INFO L226 Difference]: Without dead ends: 24 [2020-10-14 05:39:36,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:39:36,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-14 05:39:36,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-14 05:39:36,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-14 05:39:36,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2020-10-14 05:39:36,301 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2020-10-14 05:39:36,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:39:36,301 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2020-10-14 05:39:36,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:39:36,301 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2020-10-14 05:39:36,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:39:36,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:36,303 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:39:36,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:39:36,304 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:36,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:36,305 INFO L82 PathProgramCache]: Analyzing trace with hash 366822184, now seen corresponding path program 1 times [2020-10-14 05:39:36,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:36,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549911729] [2020-10-14 05:39:36,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:36,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:36,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:36,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:39:36,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:36,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-14 05:39:36,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:36,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:36,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:39:36,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:39:36,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:39:36,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:36,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:39:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:39:36,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:39:36,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:39:36,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:39:36,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:39:36,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:39:36,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:39:36,467 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:39:36,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:39:36,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:39:36,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:39:36,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:39:36,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:39:36,472 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549911729] [2020-10-14 05:39:36,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:39:36,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 05:39:36,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047791605] [2020-10-14 05:39:36,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:39:36,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:39:36,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:39:36,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:39:36,476 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand 5 states. [2020-10-14 05:39:36,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:39:36,582 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2020-10-14 05:39:36,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:39:36,583 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-10-14 05:39:36,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:39:36,584 INFO L225 Difference]: With dead ends: 30 [2020-10-14 05:39:36,584 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:39:36,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:39:36,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:39:36,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-14 05:39:36,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-14 05:39:36,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2020-10-14 05:39:36,605 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2020-10-14 05:39:36,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:39:36,605 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2020-10-14 05:39:36,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:39:36,606 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2020-10-14 05:39:36,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-14 05:39:36,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:39:36,607 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:39:36,607 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:39:36,608 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:39:36,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:39:36,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1181142684, now seen corresponding path program 1 times [2020-10-14 05:39:36,609 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:39:36,609 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526212713] [2020-10-14 05:39:36,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:39:36,633 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-14 05:39:36,633 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-10-14 05:39:36,634 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 05:39:36,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:39:36,666 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-10-14 05:39:36,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 05:39:36 BoogieIcfgContainer [2020-10-14 05:39:36,667 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 05:39:36,670 INFO L168 Benchmark]: Toolchain (without parser) took 1669.02 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 102.5 MB in the beginning and 115.5 MB in the end (delta: -13.0 MB). Peak memory consumption was 42.6 MB. Max. memory is 7.1 GB. [2020-10-14 05:39:36,671 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 147.3 MB. Free memory was 120.6 MB in the beginning and 120.2 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. [2020-10-14 05:39:36,672 INFO L168 Benchmark]: CACSL2BoogieTranslator took 271.42 ms. Allocated memory is still 147.3 MB. Free memory was 102.5 MB in the beginning and 92.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-10-14 05:39:36,673 INFO L168 Benchmark]: Boogie Preprocessor took 112.04 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 92.4 MB in the beginning and 180.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-10-14 05:39:36,673 INFO L168 Benchmark]: RCFGBuilder took 449.08 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 166.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-10-14 05:39:36,674 INFO L168 Benchmark]: TraceAbstraction took 831.09 ms. Allocated memory is still 202.9 MB. Free memory was 166.8 MB in the beginning and 115.5 MB in the end (delta: 51.3 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. [2020-10-14 05:39:36,678 INFO L336 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 147.3 MB. Free memory was 120.6 MB in the beginning and 120.2 MB in the end (delta: 419.4 kB). Peak memory consumption was 419.4 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 271.42 ms. Allocated memory is still 147.3 MB. Free memory was 102.5 MB in the beginning and 92.4 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.04 ms. Allocated memory was 147.3 MB in the beginning and 202.9 MB in the end (delta: 55.6 MB). Free memory was 92.4 MB in the beginning and 180.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 449.08 ms. Allocated memory is still 202.9 MB. Free memory was 180.4 MB in the beginning and 166.8 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 831.09 ms. Allocated memory is still 202.9 MB. Free memory was 166.8 MB in the beginning and 115.5 MB in the end (delta: 51.3 MB). Peak memory consumption was 51.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 15]: 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: [L21] int a, n, x, y, z; [L22] a = __VERIFIER_nondet_int() [L23] n = 0 [L24] x = 0 [L25] y = 1 [L26] z = 6 [L28] COND TRUE 1 [L29] CALL __VERIFIER_assert(z == 6 * n + 6) [L13] COND FALSE !(!(cond)) [L29] RET __VERIFIER_assert(z == 6 * n + 6) [L30] CALL __VERIFIER_assert(y == 3 * n * n + 3 * n + 1) [L13] COND TRUE !(cond) [L15] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.7s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 67 SDtfs, 7 SDslu, 62 SDs, 0 SdLazy, 28 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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, 0.3s InterpolantComputationTime, 20 NumberOfCodeBlocks, 20 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 468 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...