/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/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 21:37:49,237 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 21:37:49,239 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 21:37:49,271 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-18 21:37:49,271 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-18 21:37:49,272 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-18 21:37:49,273 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-18 21:37:49,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-18 21:37:49,276 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-18 21:37:49,277 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-18 21:37:49,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-18 21:37:49,279 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-18 21:37:49,279 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 21:37:49,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 21:37:49,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 21:37:49,282 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 21:37:49,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 21:37:49,283 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 21:37:49,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 21:37:49,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 21:37:49,287 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 21:37:49,288 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 21:37:49,289 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 21:37:49,290 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 21:37:49,290 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 21:37:49,292 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 21:37:49,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 21:37:49,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 21:37:49,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 21:37:49,302 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-03-18 21:37:49,320 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 21:37:49,320 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 21:37:49,321 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 21:37:49,321 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 21:37:49,322 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 21:37:49,322 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 21:37:49,322 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 21:37:49,322 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 21:37:49,322 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 21:37:49,323 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 21:37:49,323 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 21:37:49,323 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 21:37:49,323 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 21:37:49,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 21:37:49,323 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 21:37:49,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 21:37:49,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 21:37:49,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 21:37:49,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 21:37:49,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 21:37:49,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 21:37:49,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 21:37:49,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 21:37:49,325 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 21:37:49,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 21:37:49,325 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 21:37:49,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-18 21:37:49,326 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-18 21:37:49,326 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 21:37:49,327 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 21:37:49,524 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 21:37:49,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 21:37:49,549 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 21:37:49,549 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 21:37:49,550 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 21:37:49,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2022-03-18 21:37:49,593 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77b17feb3/77baec3d0dcd46e8a43800eb0216c4fb/FLAGdb56d68e5 [2022-03-18 21:37:49,920 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 21:37:49,920 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2022-03-18 21:37:49,926 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77b17feb3/77baec3d0dcd46e8a43800eb0216c4fb/FLAGdb56d68e5 [2022-03-18 21:37:50,342 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/77b17feb3/77baec3d0dcd46e8a43800eb0216c4fb [2022-03-18 21:37:50,346 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 21:37:50,347 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 21:37:50,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 21:37:50,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 21:37:50,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 21:37:50,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 09:37:50" (1/1) ... [2022-03-18 21:37:50,353 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6593e224 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:50, skipping insertion in model container [2022-03-18 21:37:50,353 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 09:37:50" (1/1) ... [2022-03-18 21:37:50,358 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 21:37:50,369 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 21:37:50,549 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i[896,909] [2022-03-18 21:37:50,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 21:37:50,589 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 21:37:50,608 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i[896,909] [2022-03-18 21:37:50,632 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 21:37:50,643 INFO L208 MainTranslator]: Completed translation [2022-03-18 21:37:50,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:50 WrapperNode [2022-03-18 21:37:50,646 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 21:37:50,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 21:37:50,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 21:37:50,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 21:37:50,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:50" (1/1) ... [2022-03-18 21:37:50,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:50" (1/1) ... [2022-03-18 21:37:50,673 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:50" (1/1) ... [2022-03-18 21:37:50,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:50" (1/1) ... [2022-03-18 21:37:50,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:50" (1/1) ... [2022-03-18 21:37:50,689 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:50" (1/1) ... [2022-03-18 21:37:50,697 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:50" (1/1) ... [2022-03-18 21:37:50,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 21:37:50,703 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 21:37:50,703 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 21:37:50,703 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 21:37:50,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:50" (1/1) ... [2022-03-18 21:37:50,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 21:37:50,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:37:50,732 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) [2022-03-18 21:37:50,753 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 [2022-03-18 21:37:50,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 21:37:50,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 21:37:50,768 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 21:37:50,769 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 21:37:50,769 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 21:37:50,769 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 21:37:50,769 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 21:37:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 21:37:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-18 21:37:50,770 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-18 21:37:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 21:37:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 21:37:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 21:37:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 21:37:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-03-18 21:37:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 21:37:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-03-18 21:37:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 21:37:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 21:37:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 21:37:50,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 21:37:50,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 21:37:50,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 21:37:50,853 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 21:37:50,854 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 21:37:50,981 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 21:37:50,986 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 21:37:50,986 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-18 21:37:50,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:37:50 BoogieIcfgContainer [2022-03-18 21:37:50,988 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 21:37:50,989 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 21:37:50,989 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 21:37:51,003 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 21:37:51,005 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:37:50" (1/1) ... [2022-03-18 21:37:51,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 09:37:51 BasicIcfg [2022-03-18 21:37:51,027 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 21:37:51,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 21:37:51,028 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 21:37:51,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 21:37:51,031 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 09:37:50" (1/4) ... [2022-03-18 21:37:51,031 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15c7fff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 09:37:51, skipping insertion in model container [2022-03-18 21:37:51,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 09:37:50" (2/4) ... [2022-03-18 21:37:51,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15c7fff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 09:37:51, skipping insertion in model container [2022-03-18 21:37:51,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 09:37:50" (3/4) ... [2022-03-18 21:37:51,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15c7fff1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 09:37:51, skipping insertion in model container [2022-03-18 21:37:51,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 09:37:51" (4/4) ... [2022-03-18 21:37:51,033 INFO L111 eAbstractionObserver]: Analyzing ICFG string-1.iqvasr [2022-03-18 21:37:51,037 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 21:37:51,037 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 21:37:51,084 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 21:37:51,097 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 [2022-03-18 21:37:51,097 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 21:37:51,112 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-18 21:37:51,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 21:37:51,116 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:37:51,116 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:37:51,117 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:37:51,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:37:51,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1544634334, now seen corresponding path program 1 times [2022-03-18 21:37:51,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:37:51,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232150013] [2022-03-18 21:37:51,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:51,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:37:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:51,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:37:51,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:51,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:37:51,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:37:51,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232150013] [2022-03-18 21:37:51,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232150013] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:37:51,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:37:51,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 21:37:51,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962988201] [2022-03-18 21:37:51,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:37:51,280 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 21:37:51,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:37:51,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 21:37:51,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 21:37:51,305 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:51,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:37:51,338 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2022-03-18 21:37:51,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 21:37:51,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-03-18 21:37:51,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:37:51,345 INFO L225 Difference]: With dead ends: 62 [2022-03-18 21:37:51,346 INFO L226 Difference]: Without dead ends: 28 [2022-03-18 21:37:51,348 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 21:37:51,351 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:37:51,352 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:37:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-18 21:37:51,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-03-18 21:37:51,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:51,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-03-18 21:37:51,394 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2022-03-18 21:37:51,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:37:51,395 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-03-18 21:37:51,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:51,396 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-03-18 21:37:51,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 21:37:51,397 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:37:51,397 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:37:51,398 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 21:37:51,402 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:37:51,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:37:51,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1694186334, now seen corresponding path program 1 times [2022-03-18 21:37:51,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:37:51,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605432559] [2022-03-18 21:37:51,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:51,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:37:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:51,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:37:51,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 21:37:51,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:37:51,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605432559] [2022-03-18 21:37:51,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605432559] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:37:51,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 21:37:51,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 21:37:51,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368642211] [2022-03-18 21:37:51,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:37:51,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 21:37:51,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:37:51,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 21:37:51,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 21:37:51,479 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:51,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:37:51,546 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2022-03-18 21:37:51,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 21:37:51,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-03-18 21:37:51,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:37:51,550 INFO L225 Difference]: With dead ends: 56 [2022-03-18 21:37:51,550 INFO L226 Difference]: Without dead ends: 36 [2022-03-18 21:37:51,550 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 21:37:51,552 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 37 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:37:51,553 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 32 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:37:51,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-18 21:37:51,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-03-18 21:37:51,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:51,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-03-18 21:37:51,559 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2022-03-18 21:37:51,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:37:51,560 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-03-18 21:37:51,560 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:51,560 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-03-18 21:37:51,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-18 21:37:51,561 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:37:51,561 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:37:51,561 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 21:37:51,561 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:37:51,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:37:51,562 INFO L85 PathProgramCache]: Analyzing trace with hash 132080930, now seen corresponding path program 1 times [2022-03-18 21:37:51,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:37:51,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49022356] [2022-03-18 21:37:51,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:51,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:37:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:51,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:37:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:51,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 21:37:51,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:37:51,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49022356] [2022-03-18 21:37:51,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49022356] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:37:51,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031839300] [2022-03-18 21:37:51,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:51,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:37:51,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:37:51,636 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) [2022-03-18 21:37:51,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 21:37:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:51,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 21:37:51,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:37:51,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 21:37:51,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:37:51,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 21:37:51,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031839300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:37:51,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:37:51,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 21:37:51,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170399530] [2022-03-18 21:37:51,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:37:51,926 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 21:37:51,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:37:51,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 21:37:51,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 21:37:51,927 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:52,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:37:52,119 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2022-03-18 21:37:52,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 21:37:52,120 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-03-18 21:37:52,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:37:52,122 INFO L225 Difference]: With dead ends: 79 [2022-03-18 21:37:52,122 INFO L226 Difference]: Without dead ends: 58 [2022-03-18 21:37:52,125 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-18 21:37:52,128 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 67 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:37:52,131 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 42 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:37:52,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-18 21:37:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 42. [2022-03-18 21:37:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-03-18 21:37:52,157 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 28 [2022-03-18 21:37:52,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:37:52,159 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-03-18 21:37:52,159 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:52,159 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-03-18 21:37:52,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 21:37:52,160 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:37:52,160 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:37:52,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 21:37:52,361 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:37:52,361 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:37:52,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:37:52,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1964785826, now seen corresponding path program 2 times [2022-03-18 21:37:52,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:37:52,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358135657] [2022-03-18 21:37:52,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:52,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:37:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:52,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:37:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 21:37:52,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:37:52,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358135657] [2022-03-18 21:37:52,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358135657] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:37:52,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362111706] [2022-03-18 21:37:52,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 21:37:52,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:37:52,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:37:52,511 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) [2022-03-18 21:37:52,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 21:37:52,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 21:37:52,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:37:52,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 21:37:52,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:37:52,766 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-03-18 21:37:52,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 21:37:52,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362111706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:37:52,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 21:37:52,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2022-03-18 21:37:52,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10975859] [2022-03-18 21:37:52,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:37:52,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 21:37:52,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:37:52,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 21:37:52,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-18 21:37:52,769 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:52,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:37:52,822 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-03-18 21:37:52,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 21:37:52,822 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-03-18 21:37:52,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:37:52,825 INFO L225 Difference]: With dead ends: 58 [2022-03-18 21:37:52,825 INFO L226 Difference]: Without dead ends: 44 [2022-03-18 21:37:52,826 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-18 21:37:52,828 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 4 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:37:52,830 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 151 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:37:52,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-18 21:37:52,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-03-18 21:37:52,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 39 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:52,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-03-18 21:37:52,843 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 40 [2022-03-18 21:37:52,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:37:52,845 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-03-18 21:37:52,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:52,847 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-03-18 21:37:52,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-18 21:37:52,853 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:37:52,853 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:37:52,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 21:37:53,081 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,SelfDestructingSolverStorable3 [2022-03-18 21:37:53,081 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:37:53,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:37:53,082 INFO L85 PathProgramCache]: Analyzing trace with hash -319404770, now seen corresponding path program 1 times [2022-03-18 21:37:53,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:37:53,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147032663] [2022-03-18 21:37:53,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:53,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:37:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:53,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:37:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 21:37:53,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:37:53,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147032663] [2022-03-18 21:37:53,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147032663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:37:53,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345467576] [2022-03-18 21:37:53,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:53,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:37:53,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:37:53,212 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 21:37:53,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 21:37:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:53,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 21:37:53,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:37:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 21:37:53,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 21:37:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-18 21:37:53,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345467576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 21:37:53,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 21:37:53,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 9 [2022-03-18 21:37:53,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380289868] [2022-03-18 21:37:53,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 21:37:53,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 21:37:53,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:37:53,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 21:37:53,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-03-18 21:37:53,468 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:53,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:37:53,614 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2022-03-18 21:37:53,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 21:37:53,616 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-03-18 21:37:53,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:37:53,619 INFO L225 Difference]: With dead ends: 97 [2022-03-18 21:37:53,619 INFO L226 Difference]: Without dead ends: 68 [2022-03-18 21:37:53,620 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 21:37:53,620 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 74 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 21:37:53,621 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 42 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 21:37:53,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-03-18 21:37:53,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2022-03-18 21:37:53,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-03-18 21:37:53,636 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 42 [2022-03-18 21:37:53,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:37:53,636 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-03-18 21:37:53,636 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:53,636 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-03-18 21:37:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-18 21:37:53,638 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 21:37:53,638 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 21:37:53,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 21:37:53,851 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:37:53,852 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 21:37:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 21:37:53,852 INFO L85 PathProgramCache]: Analyzing trace with hash 18104734, now seen corresponding path program 2 times [2022-03-18 21:37:53,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 21:37:53,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218267713] [2022-03-18 21:37:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 21:37:53,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 21:37:53,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:53,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 21:37:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 21:37:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-03-18 21:37:53,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 21:37:53,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218267713] [2022-03-18 21:37:53,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218267713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 21:37:53,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390193538] [2022-03-18 21:37:53,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 21:37:53,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:37:53,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 21:37:53,965 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 21:37:53,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 21:37:54,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-18 21:37:54,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 21:37:54,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 21:37:54,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 21:37:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-18 21:37:54,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 21:37:54,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390193538] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 21:37:54,145 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 21:37:54,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2022-03-18 21:37:54,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517452365] [2022-03-18 21:37:54,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 21:37:54,146 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 21:37:54,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 21:37:54,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 21:37:54,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-03-18 21:37:54,147 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:54,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 21:37:54,170 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-03-18 21:37:54,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 21:37:54,170 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-03-18 21:37:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 21:37:54,172 INFO L225 Difference]: With dead ends: 48 [2022-03-18 21:37:54,172 INFO L226 Difference]: Without dead ends: 0 [2022-03-18 21:37:54,173 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-03-18 21:37:54,174 INFO L912 BasicCegarLoop]: 30 mSDtfsCounter, 23 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 21:37:54,174 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 21:37:54,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-18 21:37:54,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-18 21:37:54,175 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) [2022-03-18 21:37:54,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-18 21:37:54,175 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2022-03-18 21:37:54,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 21:37:54,175 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-18 21:37:54,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 21:37:54,176 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-18 21:37:54,176 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-18 21:37:54,178 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-18 21:37:54,202 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-18 21:37:54,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 21:37:54,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-18 21:37:54,494 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|)) [2022-03-18 21:37:54,495 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-18 21:37:54,495 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-18 21:37:54,495 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-18 21:37:54,495 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-18 21:37:54,495 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-18 21:37:54,495 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-18 21:37:54,495 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 28 72) the Hoare annotation is: true [2022-03-18 21:37:54,495 INFO L878 garLoopResultBuilder]: At program point L33-3(lines 33 34) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2022-03-18 21:37:54,496 INFO L882 garLoopResultBuilder]: For program point L33-4(lines 33 34) no Hoare annotation was computed. [2022-03-18 21:37:54,496 INFO L882 garLoopResultBuilder]: For program point L33-2(lines 33 34) no Hoare annotation was computed. [2022-03-18 21:37:54,496 INFO L882 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2022-03-18 21:37:54,496 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 28 72) no Hoare annotation was computed. [2022-03-18 21:37:54,496 INFO L878 garLoopResultBuilder]: At program point L37-3(lines 37 38) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2022-03-18 21:37:54,496 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 28 72) no Hoare annotation was computed. [2022-03-18 21:37:54,496 INFO L882 garLoopResultBuilder]: For program point L37-4(lines 37 38) no Hoare annotation was computed. [2022-03-18 21:37:54,496 INFO L882 garLoopResultBuilder]: For program point L37-2(lines 37 38) no Hoare annotation was computed. [2022-03-18 21:37:54,496 INFO L882 garLoopResultBuilder]: For program point L39(line 39) no Hoare annotation was computed. [2022-03-18 21:37:54,496 INFO L878 garLoopResultBuilder]: At program point L42-3(lines 42 43) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2022-03-18 21:37:54,496 INFO L882 garLoopResultBuilder]: For program point L42-4(lines 42 43) no Hoare annotation was computed. [2022-03-18 21:37:54,497 INFO L882 garLoopResultBuilder]: For program point L42-1(lines 42 43) no Hoare annotation was computed. [2022-03-18 21:37:54,497 INFO L878 garLoopResultBuilder]: At program point L46-3(lines 46 47) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2022-03-18 21:37:54,497 INFO L882 garLoopResultBuilder]: For program point L46-4(lines 29 72) no Hoare annotation was computed. [2022-03-18 21:37:54,497 INFO L882 garLoopResultBuilder]: For program point L46-1(lines 46 47) no Hoare annotation was computed. [2022-03-18 21:37:54,497 INFO L878 garLoopResultBuilder]: At program point L55-2(lines 53 65) the Hoare annotation is: (or (and (<= main_~nc_B~0 0) (<= 0 main_~j~0)) (= 1 main_~found~0) (= 0 main_~found~0)) [2022-03-18 21:37:54,497 INFO L882 garLoopResultBuilder]: For program point L53-2(lines 53 65) no Hoare annotation was computed. [2022-03-18 21:37:54,497 INFO L882 garLoopResultBuilder]: For program point L55(lines 55 64) no Hoare annotation was computed. [2022-03-18 21:37:54,497 INFO L878 garLoopResultBuilder]: At program point L69(line 69) the Hoare annotation is: (or (= 1 main_~found~0) (= 0 main_~found~0)) [2022-03-18 21:37:54,497 INFO L882 garLoopResultBuilder]: For program point L69-1(line 69) no Hoare annotation was computed. [2022-03-18 21:37:54,497 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 18 23) the Hoare annotation is: true [2022-03-18 21:37:54,498 INFO L882 garLoopResultBuilder]: For program point L19(lines 19 21) no Hoare annotation was computed. [2022-03-18 21:37:54,498 INFO L882 garLoopResultBuilder]: For program point L20(line 20) no Hoare annotation was computed. [2022-03-18 21:37:54,498 INFO L882 garLoopResultBuilder]: For program point L19-2(lines 18 23) no Hoare annotation was computed. [2022-03-18 21:37:54,498 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 20) no Hoare annotation was computed. [2022-03-18 21:37:54,498 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 18 23) no Hoare annotation was computed. [2022-03-18 21:37:54,501 INFO L718 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2022-03-18 21:37:54,501 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-18 21:37:54,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 09:37:54 BasicIcfg [2022-03-18 21:37:54,512 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-18 21:37:54,513 INFO L158 Benchmark]: Toolchain (without parser) took 4165.62ms. Allocated memory was 200.3MB in the beginning and 282.1MB in the end (delta: 81.8MB). Free memory was 143.5MB in the beginning and 112.9MB in the end (delta: 30.6MB). Peak memory consumption was 113.2MB. Max. memory is 8.0GB. [2022-03-18 21:37:54,513 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 200.3MB. Free memory is still 159.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-18 21:37:54,513 INFO L158 Benchmark]: CACSL2BoogieTranslator took 297.31ms. Allocated memory is still 200.3MB. Free memory was 143.2MB in the beginning and 170.1MB in the end (delta: -26.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-18 21:37:54,513 INFO L158 Benchmark]: Boogie Preprocessor took 53.66ms. Allocated memory is still 200.3MB. Free memory was 170.1MB in the beginning and 168.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-18 21:37:54,514 INFO L158 Benchmark]: RCFGBuilder took 285.27ms. Allocated memory is still 200.3MB. Free memory was 168.2MB in the beginning and 156.0MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-03-18 21:37:54,514 INFO L158 Benchmark]: IcfgTransformer took 38.42ms. Allocated memory is still 200.3MB. Free memory was 156.0MB in the beginning and 154.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-18 21:37:54,514 INFO L158 Benchmark]: TraceAbstraction took 3483.92ms. Allocated memory was 200.3MB in the beginning and 282.1MB in the end (delta: 81.8MB). Free memory was 153.9MB in the beginning and 112.9MB in the end (delta: 41.0MB). Peak memory consumption was 123.8MB. Max. memory is 8.0GB. [2022-03-18 21:37:54,515 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 200.3MB. Free memory is still 159.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 297.31ms. Allocated memory is still 200.3MB. Free memory was 143.2MB in the beginning and 170.1MB in the end (delta: -26.9MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 53.66ms. Allocated memory is still 200.3MB. Free memory was 170.1MB in the beginning and 168.2MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 285.27ms. Allocated memory is still 200.3MB. Free memory was 168.2MB in the beginning and 156.0MB in the end (delta: 12.2MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 38.42ms. Allocated memory is still 200.3MB. Free memory was 156.0MB in the beginning and 154.6MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 3483.92ms. Allocated memory was 200.3MB in the beginning and 282.1MB in the end (delta: 81.8MB). Free memory was 153.9MB in the beginning and 112.9MB in the end (delta: 41.0MB). Peak memory consumption was 123.8MB. 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: 20]: 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 4 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.4s, OverallIterations: 6, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 240 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 239 mSDsluCounter, 407 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 233 mSDsCounter, 87 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 298 IncrementalHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 87 mSolverCounterUnsat, 174 mSDtfsCounter, 298 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 279 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=5, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 42 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 17 PreInvPairs, 35 NumberOfFragments, 60 HoareAnnotationTreeSize, 17 FomulaSimplifications, 12 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 131 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 358 NumberOfCodeBlocks, 320 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 416 ConstructedInterpolants, 0 QuantifiedInterpolants, 613 SizeOfPredicates, 6 NumberOfNonLiveVariables, 527 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 12 InterpolantComputations, 4 PerfectInterpolantSequences, 207/276 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: 53]: Loop Invariant Derived loop invariant: ((nc_B <= 0 && 0 <= j) || 1 == found) || 0 == found - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: 1 == found || 0 == found - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 == found || 0 == found RESULT: Ultimate proved your program to be correct! [2022-03-18 21:37:54,547 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...