/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/mannadiv_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 11:31:02,794 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 11:31:02,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 11:31:02,818 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 11:31:02,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 11:31:02,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 11:31:02,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 11:31:02,821 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 11:31:02,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 11:31:02,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 11:31:02,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 11:31:02,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 11:31:02,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 11:31:02,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 11:31:02,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 11:31:02,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 11:31:02,827 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 11:31:02,828 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 11:31:02,829 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 11:31:02,831 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 11:31:02,837 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 11:31:02,840 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 11:31:02,841 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 11:31:02,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 11:31:02,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 11:31:02,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 11:31:02,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 11:31:02,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 11:31:02,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 11:31:02,850 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-20 11:31:02,866 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 11:31:02,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 11:31:02,867 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 11:31:02,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 11:31:02,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 11:31:02,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 11:31:02,868 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 11:31:02,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 11:31:02,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 11:31:02,868 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 11:31:02,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 11:31:02,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 11:31:02,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 11:31:02,869 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 11:31:02,869 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 11:31:02,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 11:31:02,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 11:31:02,870 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 11:31:02,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 11:31:02,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 11:31:02,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 11:31:02,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 11:31:02,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 11:31:02,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 11:31:02,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 11:31:02,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 11:31:02,871 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 11:31:02,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 11:31:02,872 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 11:31:02,872 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 11:31:03,082 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 11:31:03,100 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 11:31:03,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 11:31:03,103 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 11:31:03,108 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 11:31:03,109 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_valuebound20.c [2022-03-20 11:31:03,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0028be2c7/e2dcdf3ce19e4a36aef1df1090b117a1/FLAGdd9b2a1ff [2022-03-20 11:31:03,503 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 11:31:03,503 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_valuebound20.c [2022-03-20 11:31:03,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0028be2c7/e2dcdf3ce19e4a36aef1df1090b117a1/FLAGdd9b2a1ff [2022-03-20 11:31:03,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0028be2c7/e2dcdf3ce19e4a36aef1df1090b117a1 [2022-03-20 11:31:03,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 11:31:03,936 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 11:31:03,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 11:31:03,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 11:31:03,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 11:31:03,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:31:03" (1/1) ... [2022-03-20 11:31:03,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@396b31c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:31:03, skipping insertion in model container [2022-03-20 11:31:03,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 11:31:03" (1/1) ... [2022-03-20 11:31:03,947 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 11:31:03,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 11:31:04,085 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/mannadiv_valuebound20.c[573,586] [2022-03-20 11:31:04,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 11:31:04,103 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 11:31:04,110 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/mannadiv_valuebound20.c[573,586] [2022-03-20 11:31:04,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 11:31:04,130 INFO L208 MainTranslator]: Completed translation [2022-03-20 11:31:04,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:31:04 WrapperNode [2022-03-20 11:31:04,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 11:31:04,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 11:31:04,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 11:31:04,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 11:31:04,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:31:04" (1/1) ... [2022-03-20 11:31:04,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:31:04" (1/1) ... [2022-03-20 11:31:04,147 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:31:04" (1/1) ... [2022-03-20 11:31:04,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:31:04" (1/1) ... [2022-03-20 11:31:04,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:31:04" (1/1) ... [2022-03-20 11:31:04,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:31:04" (1/1) ... [2022-03-20 11:31:04,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:31:04" (1/1) ... [2022-03-20 11:31:04,159 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 11:31:04,159 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 11:31:04,160 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 11:31:04,160 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 11:31:04,164 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:31:04" (1/1) ... [2022-03-20 11:31:04,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 11:31:04,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:31:04,187 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) [2022-03-20 11:31:04,193 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 [2022-03-20 11:31:04,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 11:31:04,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 11:31:04,216 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 11:31:04,217 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 11:31:04,217 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 11:31:04,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 11:31:04,217 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 11:31:04,218 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 11:31:04,218 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 11:31:04,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 11:31:04,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 11:31:04,219 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 11:31:04,219 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 11:31:04,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 11:31:04,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 11:31:04,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 11:31:04,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 11:31:04,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 11:31:04,219 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 11:31:04,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 11:31:04,270 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 11:31:04,273 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 11:31:04,393 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 11:31:04,397 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 11:31:04,397 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 11:31:04,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:31:04 BoogieIcfgContainer [2022-03-20 11:31:04,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 11:31:04,399 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 11:31:04,399 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 11:31:04,411 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 11:31:04,413 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:31:04" (1/1) ... [2022-03-20 11:31:04,415 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 11:31:04,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 11:31:04 BasicIcfg [2022-03-20 11:31:04,430 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 11:31:04,431 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 11:31:04,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 11:31:04,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 11:31:04,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 11:31:03" (1/4) ... [2022-03-20 11:31:04,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef8fc0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:31:04, skipping insertion in model container [2022-03-20 11:31:04,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 11:31:04" (2/4) ... [2022-03-20 11:31:04,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef8fc0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 11:31:04, skipping insertion in model container [2022-03-20 11:31:04,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 11:31:04" (3/4) ... [2022-03-20 11:31:04,435 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ef8fc0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 11:31:04, skipping insertion in model container [2022-03-20 11:31:04,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 11:31:04" (4/4) ... [2022-03-20 11:31:04,436 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_valuebound20.cqvasr [2022-03-20 11:31:04,439 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 11:31:04,439 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 11:31:04,488 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 11:31:04,492 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 [2022-03-20 11:31:04,492 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 11:31:04,510 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 11:31:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 11:31:04,514 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:31:04,514 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:31:04,515 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:31:04,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:31:04,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1058806997, now seen corresponding path program 1 times [2022-03-20 11:31:04,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:31:04,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728365567] [2022-03-20 11:31:04,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:31:04,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:31:04,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:31:04,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 11:31:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:31:04,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 11:31:04,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:31:04,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-20 11:31:04,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:31:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 11:31:04,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:31:04,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728365567] [2022-03-20 11:31:04,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728365567] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:31:04,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:31:04,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 11:31:04,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720969526] [2022-03-20 11:31:04,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:31:04,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 11:31:04,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:31:04,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 11:31:04,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 11:31:04,822 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 11:31:04,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:31:04,883 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2022-03-20 11:31:04,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 11:31:04,885 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-20 11:31:04,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:31:04,893 INFO L225 Difference]: With dead ends: 51 [2022-03-20 11:31:04,893 INFO L226 Difference]: Without dead ends: 24 [2022-03-20 11:31:04,896 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 11:31:04,899 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:31:04,900 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:31:04,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-20 11:31:04,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-20 11:31:04,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 11:31:04,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-20 11:31:04,935 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-03-20 11:31:04,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:31:04,936 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-20 11:31:04,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 11:31:04,938 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-20 11:31:04,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 11:31:04,940 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:31:04,940 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:31:04,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 11:31:04,941 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:31:04,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:31:04,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1056930164, now seen corresponding path program 1 times [2022-03-20 11:31:04,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:31:04,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463581270] [2022-03-20 11:31:04,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:31:04,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:31:04,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:31:04,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462161124] [2022-03-20 11:31:04,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:31:04,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:31:04,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:31:04,980 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) [2022-03-20 11:31:04,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 11:31:05,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:31:05,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 11:31:05,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:31:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-20 11:31:05,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 11:31:05,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:31:05,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463581270] [2022-03-20 11:31:05,198 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:31:05,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462161124] [2022-03-20 11:31:05,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462161124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 11:31:05,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 11:31:05,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 11:31:05,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654358859] [2022-03-20 11:31:05,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 11:31:05,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 11:31:05,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:31:05,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 11:31:05,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 11:31:05,202 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 11:31:05,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:31:05,283 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2022-03-20 11:31:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 11:31:05,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-20 11:31:05,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:31:05,284 INFO L225 Difference]: With dead ends: 35 [2022-03-20 11:31:05,285 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 11:31:05,285 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-20 11:31:05,286 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:31:05,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 95 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:31:05,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 11:31:05,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-03-20 11:31:05,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 11:31:05,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-20 11:31:05,291 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2022-03-20 11:31:05,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:31:05,291 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-20 11:31:05,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 11:31:05,291 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-20 11:31:05,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 11:31:05,292 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 11:31:05,292 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 11:31:05,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 11:31:05,492 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 [2022-03-20 11:31:05,493 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 11:31:05,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 11:31:05,493 INFO L85 PathProgramCache]: Analyzing trace with hash -127181274, now seen corresponding path program 1 times [2022-03-20 11:31:05,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 11:31:05,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962331020] [2022-03-20 11:31:05,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:31:05,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 11:31:05,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 11:31:05,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [834199870] [2022-03-20 11:31:05,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 11:31:05,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 11:31:05,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 11:31:05,513 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) [2022-03-20 11:31:05,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 11:31:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 11:31:05,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 11:31:05,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 11:31:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 11:31:05,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 11:31:05,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 11:31:05,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 11:31:05,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962331020] [2022-03-20 11:31:05,804 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 11:31:05,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834199870] [2022-03-20 11:31:05,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834199870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 11:31:05,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 11:31:05,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 11:31:05,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571485072] [2022-03-20 11:31:05,805 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 11:31:05,805 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 11:31:05,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 11:31:05,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 11:31:05,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 11:31:05,806 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 11:31:05,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 11:31:05,844 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-03-20 11:31:05,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 11:31:05,845 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 28 [2022-03-20 11:31:05,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 11:31:05,846 INFO L225 Difference]: With dead ends: 30 [2022-03-20 11:31:05,846 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 11:31:05,846 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-20 11:31:05,847 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 11:31:05,847 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 96 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 11:31:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 11:31:05,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 11:31:05,848 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) [2022-03-20 11:31:05,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 11:31:05,848 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2022-03-20 11:31:05,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 11:31:05,848 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 11:31:05,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-20 11:31:05,848 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 11:31:05,848 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 11:31:05,850 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 11:31:05,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 11:31:06,063 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 [2022-03-20 11:31:06,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 11:31:06,115 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|)) [2022-03-20 11:31:06,115 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 11:31:06,115 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 11:31:06,116 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 11:31:06,116 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 11:31:06,116 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 11:31:06,116 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 11:31:06,116 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 12 14) the Hoare annotation is: true [2022-03-20 11:31:06,116 INFO L882 garLoopResultBuilder]: For program point L13(line 13) no Hoare annotation was computed. [2022-03-20 11:31:06,116 INFO L882 garLoopResultBuilder]: For program point L13-2(lines 12 14) no Hoare annotation was computed. [2022-03-20 11:31:06,116 INFO L882 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 12 14) no Hoare annotation was computed. [2022-03-20 11:31:06,117 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 51) the Hoare annotation is: true [2022-03-20 11:31:06,117 INFO L885 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: true [2022-03-20 11:31:06,117 INFO L885 garLoopResultBuilder]: At program point L28-1(line 28) the Hoare annotation is: true [2022-03-20 11:31:06,117 INFO L882 garLoopResultBuilder]: For program point L29(line 29) no Hoare annotation was computed. [2022-03-20 11:31:06,117 INFO L878 garLoopResultBuilder]: At program point L40-2(lines 35 48) the Hoare annotation is: (and (not (= main_~x2~0 0)) (= (+ (* main_~x2~0 main_~y1~0) main_~y3~0 main_~y2~0) main_~x1~0)) [2022-03-20 11:31:06,117 INFO L878 garLoopResultBuilder]: At program point L35-2(lines 35 48) the Hoare annotation is: (let ((.cse0 (* main_~x2~0 main_~y1~0))) (and (not (= main_~x2~0 0)) (= (+ .cse0 main_~y3~0 main_~y2~0) main_~x1~0) (= (+ .cse0 main_~y2~0) main_~x1~0))) [2022-03-20 11:31:06,117 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (and (not (= main_~x2~0 0)) (= (+ (* main_~x2~0 main_~y1~0) main_~y3~0 main_~y2~0) main_~x1~0)) [2022-03-20 11:31:06,118 INFO L882 garLoopResultBuilder]: For program point L49(line 49) no Hoare annotation was computed. [2022-03-20 11:31:06,118 INFO L882 garLoopResultBuilder]: For program point L36-1(lines 35 48) no Hoare annotation was computed. [2022-03-20 11:31:06,118 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 22 51) no Hoare annotation was computed. [2022-03-20 11:31:06,118 INFO L882 garLoopResultBuilder]: For program point L40(lines 40 47) no Hoare annotation was computed. [2022-03-20 11:31:06,118 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 22 51) no Hoare annotation was computed. [2022-03-20 11:31:06,118 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 15 21) the Hoare annotation is: true [2022-03-20 11:31:06,118 INFO L882 garLoopResultBuilder]: For program point L16(lines 16 19) no Hoare annotation was computed. [2022-03-20 11:31:06,118 INFO L882 garLoopResultBuilder]: For program point L17(lines 17 18) no Hoare annotation was computed. [2022-03-20 11:31:06,118 INFO L882 garLoopResultBuilder]: For program point L16-2(lines 15 21) no Hoare annotation was computed. [2022-03-20 11:31:06,119 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 18) no Hoare annotation was computed. [2022-03-20 11:31:06,119 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 15 21) no Hoare annotation was computed. [2022-03-20 11:31:06,121 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-03-20 11:31:06,122 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 11:31:06,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 11:31:06 BasicIcfg [2022-03-20 11:31:06,131 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 11:31:06,132 INFO L158 Benchmark]: Toolchain (without parser) took 2195.49ms. Allocated memory was 249.6MB in the beginning and 300.9MB in the end (delta: 51.4MB). Free memory was 196.8MB in the beginning and 182.7MB in the end (delta: 14.1MB). Peak memory consumption was 64.7MB. Max. memory is 8.0GB. [2022-03-20 11:31:06,132 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 249.6MB. Free memory is still 213.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 11:31:06,133 INFO L158 Benchmark]: CACSL2BoogieTranslator took 192.04ms. Allocated memory was 249.6MB in the beginning and 300.9MB in the end (delta: 51.4MB). Free memory was 196.6MB in the beginning and 278.0MB in the end (delta: -81.4MB). Peak memory consumption was 8.1MB. Max. memory is 8.0GB. [2022-03-20 11:31:06,133 INFO L158 Benchmark]: Boogie Preprocessor took 23.79ms. Allocated memory is still 300.9MB. Free memory was 278.0MB in the beginning and 276.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 11:31:06,133 INFO L158 Benchmark]: RCFGBuilder took 238.92ms. Allocated memory is still 300.9MB. Free memory was 276.6MB in the beginning and 265.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 11:31:06,133 INFO L158 Benchmark]: IcfgTransformer took 31.09ms. Allocated memory is still 300.9MB. Free memory was 265.0MB in the beginning and 263.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 11:31:06,134 INFO L158 Benchmark]: TraceAbstraction took 1700.61ms. Allocated memory is still 300.9MB. Free memory was 262.9MB in the beginning and 182.7MB in the end (delta: 80.2MB). Peak memory consumption was 80.7MB. Max. memory is 8.0GB. [2022-03-20 11:31:06,135 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 249.6MB. Free memory is still 213.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 192.04ms. Allocated memory was 249.6MB in the beginning and 300.9MB in the end (delta: 51.4MB). Free memory was 196.6MB in the beginning and 278.0MB in the end (delta: -81.4MB). Peak memory consumption was 8.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.79ms. Allocated memory is still 300.9MB. Free memory was 278.0MB in the beginning and 276.6MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 238.92ms. Allocated memory is still 300.9MB. Free memory was 276.6MB in the beginning and 265.0MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 31.09ms. Allocated memory is still 300.9MB. Free memory was 265.0MB in the beginning and 263.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * TraceAbstraction took 1700.61ms. Allocated memory is still 300.9MB. Free memory was 262.9MB in the beginning and 182.7MB in the end (delta: 80.2MB). Peak memory consumption was 80.7MB. 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: 18]: 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, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 53 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 47 mSDsluCounter, 222 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 158 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 105 IncrementalHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 64 mSDtfsCounter, 105 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=2, InterpolantAutomatonStates: 17, 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, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 17 PreInvPairs, 23 NumberOfFragments, 60 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 61 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 202 SizeOfPredicates, 10 NumberOfNonLiveVariables, 173 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 18/20 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: 35]: Loop Invariant Derived loop invariant: !(x2 == 0) && x2 * y1 + y3 + y2 == x1 RESULT: Ultimate proved your program to be correct! [2022-03-20 11:31:06,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...