/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/trex01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 08:04:14,729 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 08:04:14,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 08:04:14,777 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-20 08:04:14,777 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-20 08:04:14,778 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-20 08:04:14,781 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-20 08:04:14,785 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-20 08:04:14,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-20 08:04:14,790 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-20 08:04:14,791 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-20 08:04:14,792 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-20 08:04:14,792 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 08:04:14,792 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 08:04:14,793 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 08:04:14,793 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 08:04:14,794 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 08:04:14,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 08:04:14,795 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 08:04:14,796 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 08:04:14,797 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 08:04:14,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 08:04:14,800 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 08:04:14,801 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 08:04:14,803 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 08:04:14,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 08:04:14,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 08:04:14,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 08:04:14,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 08:04:14,819 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 08:04:14,837 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 08:04:14,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 08:04:14,838 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 08:04:14,838 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 08:04:14,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 08:04:14,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 08:04:14,839 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 08:04:14,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 08:04:14,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 08:04:14,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 08:04:14,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 08:04:14,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 08:04:14,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 08:04:14,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 08:04:14,840 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 08:04:14,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 08:04:14,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 08:04:14,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 08:04:14,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 08:04:14,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:04:14,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 08:04:14,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 08:04:14,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 08:04:14,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 08:04:14,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 08:04:14,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 08:04:14,842 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-03-20 08:04:14,842 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-03-20 08:04:14,842 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 08:04:14,842 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 08:04:15,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 08:04:15,045 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 08:04:15,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 08:04:15,048 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 08:04:15,048 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 08:04:15,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/trex01-2.i [2022-03-20 08:04:15,089 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/960144d0d/99244a9633d64e72a42e52866ac2bfbb/FLAGa08ecc486 [2022-03-20 08:04:15,437 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 08:04:15,437 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/trex01-2.i [2022-03-20 08:04:15,445 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/960144d0d/99244a9633d64e72a42e52866ac2bfbb/FLAGa08ecc486 [2022-03-20 08:04:15,875 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/960144d0d/99244a9633d64e72a42e52866ac2bfbb [2022-03-20 08:04:15,877 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 08:04:15,878 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 08:04:15,879 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 08:04:15,879 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 08:04:15,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 08:04:15,881 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:04:15" (1/1) ... [2022-03-20 08:04:15,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e4552e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:15, skipping insertion in model container [2022-03-20 08:04:15,884 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 08:04:15" (1/1) ... [2022-03-20 08:04:15,888 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 08:04:15,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 08:04:15,997 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/trex01-2.i[895,908] [2022-03-20 08:04:16,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:04:16,037 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 08:04:16,045 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/trex01-2.i[895,908] [2022-03-20 08:04:16,050 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 08:04:16,060 INFO L208 MainTranslator]: Completed translation [2022-03-20 08:04:16,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:16 WrapperNode [2022-03-20 08:04:16,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 08:04:16,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 08:04:16,062 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 08:04:16,062 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 08:04:16,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:16" (1/1) ... [2022-03-20 08:04:16,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:16" (1/1) ... [2022-03-20 08:04:16,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:16" (1/1) ... [2022-03-20 08:04:16,074 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:16" (1/1) ... [2022-03-20 08:04:16,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:16" (1/1) ... [2022-03-20 08:04:16,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:16" (1/1) ... [2022-03-20 08:04:16,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:16" (1/1) ... [2022-03-20 08:04:16,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 08:04:16,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 08:04:16,083 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 08:04:16,083 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 08:04:16,084 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:16" (1/1) ... [2022-03-20 08:04:16,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 08:04:16,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 08:04:16,104 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 08:04:16,114 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 08:04:16,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 08:04:16,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 08:04:16,132 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 08:04:16,132 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 08:04:16,132 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 08:04:16,132 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-03-20 08:04:16,132 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 08:04:16,133 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 08:04:16,133 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 08:04:16,133 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 08:04:16,133 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 08:04:16,133 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 08:04:16,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 08:04:16,133 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 08:04:16,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 08:04:16,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2022-03-20 08:04:16,133 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 08:04:16,133 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-03-20 08:04:16,134 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 08:04:16,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 08:04:16,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 08:04:16,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 08:04:16,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 08:04:16,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 08:04:16,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 08:04:16,181 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 08:04:16,182 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 08:04:16,306 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 08:04:16,310 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 08:04:16,310 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 08:04:16,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:04:16 BoogieIcfgContainer [2022-03-20 08:04:16,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 08:04:16,312 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 08:04:16,312 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 08:04:16,317 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 08:04:16,319 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:04:16" (1/1) ... [2022-03-20 08:04:16,320 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_QVASR [2022-03-20 08:04:16,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:04:16 BasicIcfg [2022-03-20 08:04:16,424 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 08:04:16,425 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 08:04:16,425 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 08:04:16,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 08:04:16,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 08:04:15" (1/4) ... [2022-03-20 08:04:16,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74778191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:04:16, skipping insertion in model container [2022-03-20 08:04:16,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 08:04:16" (2/4) ... [2022-03-20 08:04:16,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74778191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 08:04:16, skipping insertion in model container [2022-03-20 08:04:16,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 08:04:16" (3/4) ... [2022-03-20 08:04:16,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74778191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:04:16, skipping insertion in model container [2022-03-20 08:04:16,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 08:04:16" (4/4) ... [2022-03-20 08:04:16,429 INFO L111 eAbstractionObserver]: Analyzing ICFG trex01-2.iqvasr [2022-03-20 08:04:16,433 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 08:04:16,433 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 08:04:16,463 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 08:04:16,475 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 08:04:16,475 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 08:04:16,488 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 08:04:16,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 08:04:16,498 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:16,498 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:16,498 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:16,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:16,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2126475340, now seen corresponding path program 1 times [2022-03-20 08:04:16,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:16,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785086806] [2022-03-20 08:04:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:16,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:16,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:04:16,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:16,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785086806] [2022-03-20 08:04:16,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785086806] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:04:16,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:04:16,652 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 08:04:16,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733039613] [2022-03-20 08:04:16,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:04:16,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 08:04:16,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:16,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 08:04:16,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 08:04:16,676 INFO L87 Difference]: Start difference. First operand has 32 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 23 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-03-20 08:04:16,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:16,705 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-03-20 08:04:16,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 08:04:16,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 15 [2022-03-20 08:04:16,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:16,711 INFO L225 Difference]: With dead ends: 52 [2022-03-20 08:04:16,711 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 08:04:16,715 INFO L912 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 [2022-03-20 08:04:16,718 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:16,718 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 39 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:04:16,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 08:04:16,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-20 08:04:16,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 5 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:16,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-03-20 08:04:16,739 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2022-03-20 08:04:16,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:16,739 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-03-20 08:04:16,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2022-03-20 08:04:16,740 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-03-20 08:04:16,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 08:04:16,740 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:16,740 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:16,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 08:04:16,741 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:16,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2125551819, now seen corresponding path program 1 times [2022-03-20 08:04:16,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:16,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735049936] [2022-03-20 08:04:16,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:16,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:16,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:16,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:04:16,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:16,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735049936] [2022-03-20 08:04:16,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735049936] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:04:16,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:04:16,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 08:04:16,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426952713] [2022-03-20 08:04:16,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:04:16,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 08:04:16,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:16,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 08:04:16,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 08:04:16,809 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-03-20 08:04:16,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:16,875 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2022-03-20 08:04:16,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 08:04:16,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 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 15 [2022-03-20 08:04:16,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:16,877 INFO L225 Difference]: With dead ends: 23 [2022-03-20 08:04:16,878 INFO L226 Difference]: Without dead ends: 18 [2022-03-20 08:04:16,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-03-20 08:04:16,879 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:16,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 32 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:04:16,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-03-20 08:04:16,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-03-20 08:04:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 5 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 08:04:16,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-03-20 08:04:16,883 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 15 [2022-03-20 08:04:16,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:16,883 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-03-20 08:04:16,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-03-20 08:04:16,884 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-03-20 08:04:16,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 08:04:16,884 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 08:04:16,884 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 08:04:16,884 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 08:04:16,885 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 08:04:16,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 08:04:16,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1440907086, now seen corresponding path program 1 times [2022-03-20 08:04:16,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 08:04:16,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575291228] [2022-03-20 08:04:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 08:04:16,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 08:04:16,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:16,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 08:04:16,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 08:04:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 08:04:16,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 08:04:16,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575291228] [2022-03-20 08:04:16,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575291228] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 08:04:16,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 08:04:16,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 08:04:16,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113668072] [2022-03-20 08:04:16,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 08:04:16,937 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 08:04:16,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 08:04:16,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 08:04:16,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 08:04:16,938 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-03-20 08:04:16,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 08:04:16,957 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-03-20 08:04:16,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 08:04:16,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 16 [2022-03-20 08:04:16,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 08:04:16,957 INFO L225 Difference]: With dead ends: 18 [2022-03-20 08:04:16,957 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 08:04:16,958 INFO L912 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 [2022-03-20 08:04:16,959 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 08:04:16,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 08:04:16,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 08:04:16,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 08:04:16,960 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 08:04:16,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 08:04:16,960 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2022-03-20 08:04:16,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 08:04:16,960 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 08:04:16,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-03-20 08:04:16,960 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 08:04:16,960 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 08:04:16,962 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 08:04:16,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 08:04:16,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-03-20 08:04:16,983 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 08:04:16,983 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:04:16,983 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:04:16,983 INFO L885 garLoopResultBuilder]: At program point fENTRY(lines 25 47) the Hoare annotation is: true [2022-03-20 08:04:16,983 INFO L882 garLoopResultBuilder]: For program point L27(lines 27 29) no Hoare annotation was computed. [2022-03-20 08:04:16,983 INFO L882 garLoopResultBuilder]: For program point L36-2(lines 25 47) no Hoare annotation was computed. [2022-03-20 08:04:16,983 INFO L878 garLoopResultBuilder]: At program point L30-2(line 30) the Hoare annotation is: (or (<= (+ f_~z~0 2) f_~k~0) (<= 1 f_~z~0)) [2022-03-20 08:04:16,984 INFO L882 garLoopResultBuilder]: For program point fEXIT(lines 25 47) no Hoare annotation was computed. [2022-03-20 08:04:16,984 INFO L878 garLoopResultBuilder]: At program point L30-3(line 30) the Hoare annotation is: (<= 1 f_~z~0) [2022-03-20 08:04:16,984 INFO L882 garLoopResultBuilder]: For program point L31(lines 25 47) no Hoare annotation was computed. [2022-03-20 08:04:16,984 INFO L882 garLoopResultBuilder]: For program point L34(line 34) no Hoare annotation was computed. [2022-03-20 08:04:16,984 INFO L882 garLoopResultBuilder]: For program point L35(line 35) no Hoare annotation was computed. [2022-03-20 08:04:16,984 INFO L885 garLoopResultBuilder]: At program point L38-2(lines 36 46) the Hoare annotation is: true [2022-03-20 08:04:16,984 INFO L882 garLoopResultBuilder]: For program point L38(lines 38 45) no Hoare annotation was computed. [2022-03-20 08:04:16,984 INFO L882 garLoopResultBuilder]: For program point L39(lines 39 40) no Hoare annotation was computed. [2022-03-20 08:04:16,984 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-03-20 08:04:16,984 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-03-20 08:04:16,984 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-03-20 08:04:16,984 INFO L882 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-03-20 08:04:16,984 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 48 56) the Hoare annotation is: true [2022-03-20 08:04:16,985 INFO L882 garLoopResultBuilder]: For program point L50(lines 50 54) no Hoare annotation was computed. [2022-03-20 08:04:16,985 INFO L885 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: true [2022-03-20 08:04:16,985 INFO L885 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: true [2022-03-20 08:04:16,985 INFO L882 garLoopResultBuilder]: For program point L53-1(lines 50 54) no Hoare annotation was computed. [2022-03-20 08:04:16,985 INFO L882 garLoopResultBuilder]: For program point mainFINAL(lines 48 56) no Hoare annotation was computed. [2022-03-20 08:04:16,985 INFO L882 garLoopResultBuilder]: For program point mainEXIT(lines 48 56) no Hoare annotation was computed. [2022-03-20 08:04:16,985 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2022-03-20 08:04:16,985 INFO L882 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-03-20 08:04:16,985 INFO L882 garLoopResultBuilder]: For program point L19(line 19) no Hoare annotation was computed. [2022-03-20 08:04:16,985 INFO L882 garLoopResultBuilder]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2022-03-20 08:04:16,985 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2022-03-20 08:04:16,986 INFO L882 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2022-03-20 08:04:16,988 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-03-20 08:04:16,989 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 08:04:16,997 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 08:04:16 BasicIcfg [2022-03-20 08:04:16,997 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 08:04:16,998 INFO L158 Benchmark]: Toolchain (without parser) took 1119.95ms. Allocated memory was 173.0MB in the beginning and 234.9MB in the end (delta: 61.9MB). Free memory was 115.5MB in the beginning and 147.3MB in the end (delta: -31.8MB). Peak memory consumption was 30.3MB. Max. memory is 8.0GB. [2022-03-20 08:04:16,998 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 173.0MB. Free memory is still 131.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 08:04:16,998 INFO L158 Benchmark]: CACSL2BoogieTranslator took 182.62ms. Allocated memory was 173.0MB in the beginning and 234.9MB in the end (delta: 61.9MB). Free memory was 115.3MB in the beginning and 208.0MB in the end (delta: -92.7MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. [2022-03-20 08:04:16,999 INFO L158 Benchmark]: Boogie Preprocessor took 19.73ms. Allocated memory is still 234.9MB. Free memory was 208.0MB in the beginning and 206.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 08:04:16,999 INFO L158 Benchmark]: RCFGBuilder took 228.25ms. Allocated memory is still 234.9MB. Free memory was 206.1MB in the beginning and 194.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-20 08:04:16,999 INFO L158 Benchmark]: IcfgTransformer took 111.99ms. Allocated memory is still 234.9MB. Free memory was 194.5MB in the beginning and 188.8MB in the end (delta: 5.8MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. [2022-03-20 08:04:16,999 INFO L158 Benchmark]: TraceAbstraction took 572.36ms. Allocated memory is still 234.9MB. Free memory was 188.8MB in the beginning and 147.3MB in the end (delta: 41.5MB). Peak memory consumption was 41.9MB. Max. memory is 8.0GB. [2022-03-20 08:04:17,001 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 173.0MB. Free memory is still 131.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 182.62ms. Allocated memory was 173.0MB in the beginning and 234.9MB in the end (delta: 61.9MB). Free memory was 115.3MB in the beginning and 208.0MB in the end (delta: -92.7MB). Peak memory consumption was 11.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.73ms. Allocated memory is still 234.9MB. Free memory was 208.0MB in the beginning and 206.6MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 228.25ms. Allocated memory is still 234.9MB. Free memory was 206.1MB in the beginning and 194.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * IcfgTransformer took 111.99ms. Allocated memory is still 234.9MB. Free memory was 194.5MB in the beginning and 188.8MB in the end (delta: 5.8MB). Peak memory consumption was 5.2MB. Max. memory is 8.0GB. * TraceAbstraction took 572.36ms. Allocated memory is still 234.9MB. Free memory was 188.8MB in the beginning and 147.3MB in the end (delta: 41.5MB). Peak memory consumption was 41.9MB. 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: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 49 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 46 mSDsluCounter, 90 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 27 mSDsCounter, 13 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 57 IncrementalHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 13 mSolverCounterUnsat, 63 mSDtfsCounter, 57 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 17 PreInvPairs, 23 NumberOfFragments, 27 HoareAnnotationTreeSize, 17 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 46 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 77 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 1/1 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: 30]: Loop Invariant Derived loop invariant: z + 2 <= k || 1 <= z - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-03-20 08:04:17,024 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...