/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 22:45:25,628 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 22:45:25,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 22:45:25,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 22:45:25,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 22:45:25,678 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 22:45:25,682 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 22:45:25,686 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 22:45:25,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 22:45:25,687 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 22:45:25,688 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 22:45:25,699 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 22:45:25,700 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 22:45:25,701 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 22:45:25,701 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 22:45:25,702 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 22:45:25,703 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 22:45:25,703 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 22:45:25,704 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 22:45:25,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 22:45:25,706 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 22:45:25,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 22:45:25,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 22:45:25,713 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 22:45:25,714 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 22:45:25,719 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-03-17 22:45:25,719 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-03-17 22:45:25,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-03-17 22:45:25,720 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-03-17 22:45:25,720 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-03-17 22:45:25,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2022-03-17 22:45:25,723 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 22:45:25,724 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 22:45:25,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 22:45:25,729 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-17 22:45:25,748 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 22:45:25,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 22:45:25,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-17 22:45:25,750 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-17 22:45:25,750 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-17 22:45:25,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-17 22:45:25,750 INFO L138 SettingsManager]: * Use SBE=true [2022-03-17 22:45:25,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 22:45:25,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 22:45:25,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 22:45:25,751 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 22:45:25,751 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 22:45:25,751 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 22:45:25,752 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 22:45:25,752 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 22:45:25,752 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 22:45:25,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 22:45:25,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 22:45:25,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 22:45:25,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 22:45:25,752 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 22:45:25,752 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-17 22:45:25,752 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-17 22:45:25,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 22:45:25,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-17 22:45:25,753 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-17 22:45:25,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-17 22:45:25,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-17 22:45:25,754 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 22:45:25,754 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 22:45:25,924 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 22:45:25,939 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 22:45:25,941 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 22:45:25,941 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 22:45:25,942 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 22:45:25,943 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound1.c [2022-03-17 22:45:26,001 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e1d75b2b/cf4a664285a948c9944dd0523b58b41a/FLAG94cc37b4c [2022-03-17 22:45:26,299 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 22:45:26,299 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound1.c [2022-03-17 22:45:26,303 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e1d75b2b/cf4a664285a948c9944dd0523b58b41a/FLAG94cc37b4c [2022-03-17 22:45:26,742 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e1d75b2b/cf4a664285a948c9944dd0523b58b41a [2022-03-17 22:45:26,744 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 22:45:26,745 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 22:45:26,750 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 22:45:26,750 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 22:45:26,752 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 22:45:26,752 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 10:45:26" (1/1) ... [2022-03-17 22:45:26,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44ea4fcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:45:26, skipping insertion in model container [2022-03-17 22:45:26,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 10:45:26" (1/1) ... [2022-03-17 22:45:26,757 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 22:45:26,765 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 22:45:26,871 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound1.c[537,550] [2022-03-17 22:45:26,879 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 22:45:26,884 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 22:45:26,892 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prodbin-ll_valuebound1.c[537,550] [2022-03-17 22:45:26,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 22:45:26,903 INFO L208 MainTranslator]: Completed translation [2022-03-17 22:45:26,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:45:26 WrapperNode [2022-03-17 22:45:26,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 22:45:26,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 22:45:26,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 22:45:26,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 22:45:26,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:45:26" (1/1) ... [2022-03-17 22:45:26,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:45:26" (1/1) ... [2022-03-17 22:45:26,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:45:26" (1/1) ... [2022-03-17 22:45:26,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:45:26" (1/1) ... [2022-03-17 22:45:26,917 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:45:26" (1/1) ... [2022-03-17 22:45:26,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:45:26" (1/1) ... [2022-03-17 22:45:26,920 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:45:26" (1/1) ... [2022-03-17 22:45:26,921 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 22:45:26,921 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 22:45:26,921 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 22:45:26,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 22:45:26,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:45:26" (1/1) ... [2022-03-17 22:45:26,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 22:45:26,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:45:26,952 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 22:45:26,958 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 22:45:26,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 22:45:26,976 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 22:45:26,976 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 22:45:26,976 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 22:45:26,976 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 22:45:26,976 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 22:45:26,977 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 22:45:26,977 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 22:45:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 22:45:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 22:45:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 22:45:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 22:45:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 22:45:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 22:45:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 22:45:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 22:45:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 22:45:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 22:45:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 22:45:26,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 22:45:27,019 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 22:45:27,020 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 22:45:27,099 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 22:45:27,103 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 22:45:27,103 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 22:45:27,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:45:27 BoogieIcfgContainer [2022-03-17 22:45:27,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 22:45:27,105 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 22:45:27,105 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 22:45:27,105 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 22:45:27,107 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:45:27" (1/1) ... [2022-03-17 22:45:27,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 10:45:27 BasicIcfg [2022-03-17 22:45:27,120 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 22:45:27,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 22:45:27,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 22:45:27,123 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 22:45:27,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 10:45:26" (1/4) ... [2022-03-17 22:45:27,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b157a72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 10:45:27, skipping insertion in model container [2022-03-17 22:45:27,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 10:45:26" (2/4) ... [2022-03-17 22:45:27,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b157a72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 10:45:27, skipping insertion in model container [2022-03-17 22:45:27,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 10:45:27" (3/4) ... [2022-03-17 22:45:27,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b157a72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 10:45:27, skipping insertion in model container [2022-03-17 22:45:27,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 10:45:27" (4/4) ... [2022-03-17 22:45:27,125 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_valuebound1.cqvasr [2022-03-17 22:45:27,128 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-17 22:45:27,128 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 22:45:27,172 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 22:45:27,177 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 22:45:27,177 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 22:45:27,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-17 22:45:27,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 22:45:27,203 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:45:27,204 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:45:27,204 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:45:27,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:45:27,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1656134296, now seen corresponding path program 1 times [2022-03-17 22:45:27,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:45:27,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131752157] [2022-03-17 22:45:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:45:27,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:45:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:45:27,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 22:45:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:45:27,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 22:45:27,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:45:27,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-17 22:45:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:45:27,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-17 22:45:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:45:27,397 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 22:45:27,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:45:27,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131752157] [2022-03-17 22:45:27,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131752157] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:45:27,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:45:27,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 22:45:27,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084365611] [2022-03-17 22:45:27,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:45:27,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 22:45:27,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:45:27,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 22:45:27,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 22:45:27,432 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 22:45:27,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:45:27,483 INFO L93 Difference]: Finished difference Result 57 states and 77 transitions. [2022-03-17 22:45:27,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 22:45:27,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-17 22:45:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:45:27,490 INFO L225 Difference]: With dead ends: 57 [2022-03-17 22:45:27,490 INFO L226 Difference]: Without dead ends: 27 [2022-03-17 22:45:27,492 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 22:45:27,494 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:45:27,495 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:45:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-17 22:45:27,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-17 22:45:27,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 22:45:27,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-17 22:45:27,518 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 28 [2022-03-17 22:45:27,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:45:27,518 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-17 22:45:27,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 22:45:27,519 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-17 22:45:27,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 22:45:27,520 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:45:27,520 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:45:27,520 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 22:45:27,520 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:45:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:45:27,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1063826184, now seen corresponding path program 1 times [2022-03-17 22:45:27,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:45:27,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829288929] [2022-03-17 22:45:27,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:45:27,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:45:27,535 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:45:27,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521969326] [2022-03-17 22:45:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:45:27,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:45:27,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:45:27,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:45:27,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 22:45:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:45:27,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-17 22:45:27,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:45:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 22:45:27,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 22:45:27,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:45:27,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829288929] [2022-03-17 22:45:27,739 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:45:27,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521969326] [2022-03-17 22:45:27,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521969326] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 22:45:27,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 22:45:27,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-17 22:45:27,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713288237] [2022-03-17 22:45:27,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 22:45:27,741 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-17 22:45:27,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:45:27,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-17 22:45:27,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-03-17 22:45:27,742 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 22:45:27,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:45:27,806 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-03-17 22:45:27,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-17 22:45:27,806 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-17 22:45:27,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:45:27,807 INFO L225 Difference]: With dead ends: 47 [2022-03-17 22:45:27,807 INFO L226 Difference]: Without dead ends: 35 [2022-03-17 22:45:27,807 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-17 22:45:27,808 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 22:45:27,809 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 144 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 22:45:27,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-17 22:45:27,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-17 22:45:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 22:45:27,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-03-17 22:45:27,814 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2022-03-17 22:45:27,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:45:27,815 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-03-17 22:45:27,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-17 22:45:27,816 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-03-17 22:45:27,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-17 22:45:27,816 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 22:45:27,816 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 22:45:27,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-17 22:45:28,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:45:28,020 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 22:45:28,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 22:45:28,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1096608558, now seen corresponding path program 1 times [2022-03-17 22:45:28,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 22:45:28,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332671900] [2022-03-17 22:45:28,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:45:28,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 22:45:28,034 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 22:45:28,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187168695] [2022-03-17 22:45:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 22:45:28,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 22:45:28,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 22:45:28,040 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 22:45:28,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 22:45:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 22:45:28,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-17 22:45:28,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 22:45:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-17 22:45:28,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 22:45:31,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-17 22:45:31,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 22:45:31,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332671900] [2022-03-17 22:45:31,823 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 22:45:31,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187168695] [2022-03-17 22:45:31,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187168695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 22:45:31,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 22:45:31,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-03-17 22:45:31,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337603208] [2022-03-17 22:45:31,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 22:45:31,824 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-17 22:45:31,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 22:45:31,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-17 22:45:31,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-03-17 22:45:31,825 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-17 22:45:31,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 22:45:31,996 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2022-03-17 22:45:31,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-17 22:45:31,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) Word has length 37 [2022-03-17 22:45:31,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 22:45:31,997 INFO L225 Difference]: With dead ends: 44 [2022-03-17 22:45:31,997 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 22:45:31,997 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2022-03-17 22:45:31,998 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 22:45:31,998 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 180 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 22:45:31,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 22:45:31,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 22:45:31,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 22:45:31,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 22:45:31,999 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2022-03-17 22:45:31,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 22:45:31,999 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 22:45:31,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 16 states have internal predecessors, (31), 6 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-03-17 22:45:31,999 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 22:45:31,999 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 22:45:32,001 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 22:45:32,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 22:45:32,202 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 22:45:32,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-17 22:45:32,270 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-03-17 22:45:32,270 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-17 22:45:32,270 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-17 22:45:32,270 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-17 22:45:32,270 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-17 22:45:32,270 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-17 22:45:32,270 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-17 22:45:32,270 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 9 11) the Hoare annotation is: true [2022-03-17 22:45:32,270 INFO L882 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2022-03-17 22:45:32,270 INFO L882 garLoopResultBuilder]: For program point L10-2(lines 9 11) no Hoare annotation was computed. [2022-03-17 22:45:32,271 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 9 11) no Hoare annotation was computed. [2022-03-17 22:45:32,271 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-03-17 22:45:32,271 INFO L885 garLoopResultBuilder]: At program point L25(line 25) the Hoare annotation is: true [2022-03-17 22:45:32,271 INFO L882 garLoopResultBuilder]: For program point L25-1(line 25) no Hoare annotation was computed. [2022-03-17 22:45:32,271 INFO L878 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (and (<= main_~a~0 1) (<= 0 main_~a~0)) [2022-03-17 22:45:32,271 INFO L878 garLoopResultBuilder]: At program point L27-1(line 27) the Hoare annotation is: (and (<= main_~a~0 1) (<= main_~b~0 1) (<= 0 main_~a~0) (<= 0 main_~b~0)) [2022-03-17 22:45:32,271 INFO L882 garLoopResultBuilder]: For program point L28(line 28) no Hoare annotation was computed. [2022-03-17 22:45:32,271 INFO L878 garLoopResultBuilder]: At program point L34-2(lines 34 45) the Hoare annotation is: (let ((.cse0 (<= main_~a~0 1)) (.cse1 (<= main_~b~0 1)) (.cse2 (<= 0 main_~a~0)) (.cse3 (<= 1 main_~b~0))) (or (and (= main_~z~0 0) .cse0 .cse1 (= main_~b~0 main_~y~0) .cse2 .cse3 (= main_~a~0 main_~x~0)) (and .cse0 (= main_~a~0 main_~z~0) .cse1 (= (* main_~a~0 2) main_~x~0) .cse2 .cse3 (= (div (+ (- 1) main_~b~0) 2) main_~y~0)))) [2022-03-17 22:45:32,271 INFO L878 garLoopResultBuilder]: At program point L34-3(lines 34 45) the Hoare annotation is: (and (<= main_~a~0 1) (= main_~a~0 main_~z~0) (<= main_~b~0 1) (= (* main_~a~0 2) main_~x~0) (<= 0 main_~a~0) (<= 1 main_~b~0) (= (div (+ (- 1) main_~b~0) 2) main_~y~0)) [2022-03-17 22:45:32,271 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (<= main_~a~0 1)) (.cse1 (<= main_~b~0 1)) (.cse2 (<= 0 main_~a~0)) (.cse3 (<= 1 main_~b~0))) (or (and (= main_~z~0 0) .cse0 .cse1 (= main_~b~0 main_~y~0) .cse2 .cse3 (= main_~a~0 main_~x~0)) (and .cse0 (= main_~a~0 main_~z~0) .cse1 (= (* main_~a~0 2) main_~x~0) .cse2 .cse3 (= (div (+ (- 1) main_~b~0) 2) main_~y~0)))) [2022-03-17 22:45:32,272 INFO L882 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-03-17 22:45:32,272 INFO L882 garLoopResultBuilder]: For program point L35-1(lines 34 45) no Hoare annotation was computed. [2022-03-17 22:45:32,272 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 20 49) no Hoare annotation was computed. [2022-03-17 22:45:32,272 INFO L882 garLoopResultBuilder]: For program point L39(lines 39 42) no Hoare annotation was computed. [2022-03-17 22:45:32,272 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2022-03-17 22:45:32,272 INFO L882 garLoopResultBuilder]: For program point L39-2(lines 39 42) no Hoare annotation was computed. [2022-03-17 22:45:32,272 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 12 18) the Hoare annotation is: true [2022-03-17 22:45:32,272 INFO L882 garLoopResultBuilder]: For program point L13(lines 13 16) no Hoare annotation was computed. [2022-03-17 22:45:32,272 INFO L882 garLoopResultBuilder]: For program point L14(lines 14 15) no Hoare annotation was computed. [2022-03-17 22:45:32,272 INFO L882 garLoopResultBuilder]: For program point L13-2(lines 12 18) no Hoare annotation was computed. [2022-03-17 22:45:32,272 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2022-03-17 22:45:32,272 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 12 18) no Hoare annotation was computed. [2022-03-17 22:45:32,275 INFO L718 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-03-17 22:45:32,275 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 22:45:32,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 10:45:32 BasicIcfg [2022-03-17 22:45:32,284 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 22:45:32,285 INFO L158 Benchmark]: Toolchain (without parser) took 5539.75ms. Allocated memory was 185.6MB in the beginning and 235.9MB in the end (delta: 50.3MB). Free memory was 135.0MB in the beginning and 201.4MB in the end (delta: -66.4MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 22:45:32,285 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 185.6MB. Free memory was 151.0MB in the beginning and 150.9MB in the end (delta: 151.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 22:45:32,285 INFO L158 Benchmark]: CACSL2BoogieTranslator took 153.72ms. Allocated memory is still 185.6MB. Free memory was 134.8MB in the beginning and 162.1MB in the end (delta: -27.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 22:45:32,286 INFO L158 Benchmark]: Boogie Preprocessor took 15.78ms. Allocated memory is still 185.6MB. Free memory was 162.1MB in the beginning and 160.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 22:45:32,286 INFO L158 Benchmark]: RCFGBuilder took 182.98ms. Allocated memory is still 185.6MB. Free memory was 160.5MB in the beginning and 150.5MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-17 22:45:32,286 INFO L158 Benchmark]: IcfgTransformer took 15.03ms. Allocated memory is still 185.6MB. Free memory was 150.5MB in the beginning and 149.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-17 22:45:32,286 INFO L158 Benchmark]: TraceAbstraction took 5163.67ms. Allocated memory was 185.6MB in the beginning and 235.9MB in the end (delta: 50.3MB). Free memory was 148.4MB in the beginning and 201.4MB in the end (delta: -52.9MB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 22:45:32,287 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 185.6MB. Free memory was 151.0MB in the beginning and 150.9MB in the end (delta: 151.9kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 153.72ms. Allocated memory is still 185.6MB. Free memory was 134.8MB in the beginning and 162.1MB in the end (delta: -27.3MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 15.78ms. Allocated memory is still 185.6MB. Free memory was 162.1MB in the beginning and 160.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 182.98ms. Allocated memory is still 185.6MB. Free memory was 160.5MB in the beginning and 150.5MB in the end (delta: 10.0MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 15.03ms. Allocated memory is still 185.6MB. Free memory was 150.5MB in the beginning and 149.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 5163.67ms. Allocated memory was 185.6MB in the beginning and 235.9MB in the end (delta: 50.3MB). Free memory was 148.4MB in the beginning and 201.4MB in the end (delta: -52.9MB). There was no memory consumed. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.1s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 65 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 55 mSDsluCounter, 358 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 287 mSDsCounter, 24 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 242 IncrementalHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 24 mSolverCounterUnsat, 71 mSDtfsCounter, 242 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 117 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=2, InterpolantAutomatonStates: 24, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 24 PreInvPairs, 31 NumberOfFragments, 163 HoareAnnotationTreeSize, 24 FomulaSimplifications, 27 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 93 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 126 ConstructedInterpolants, 0 QuantifiedInterpolants, 571 SizeOfPredicates, 7 NumberOfNonLiveVariables, 201 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 46/56 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: ((((((z == 0 && a <= 1) && b <= 1) && b == y) && 0 <= a) && 1 <= b) && a == x) || ((((((a <= 1 && a == z) && b <= 1) && a * 2 == x) && 0 <= a) && 1 <= b) && (-1 + b) / 2 == y) RESULT: Ultimate proved your program to be correct! [2022-03-17 22:45:32,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...