/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/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7968f31 [2022-03-17 18:07:57,772 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-17 18:07:57,773 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-17 18:07:57,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-03-17 18:07:57,843 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-03-17 18:07:57,844 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-03-17 18:07:57,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-03-17 18:07:57,848 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-03-17 18:07:57,849 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-03-17 18:07:57,849 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-03-17 18:07:57,850 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-03-17 18:07:57,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-03-17 18:07:57,850 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-17 18:07:57,851 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-17 18:07:57,852 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-17 18:07:57,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-17 18:07:57,853 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-17 18:07:57,853 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-17 18:07:57,854 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-17 18:07:57,856 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-17 18:07:57,856 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-17 18:07:57,857 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-17 18:07:57,858 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-17 18:07:57,858 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-17 18:07:57,859 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-17 18:07:57,860 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-17 18:07:57,865 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-17 18:07:57,866 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-17 18:07:57,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-17 18:07:57,872 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-17 18:07:57,880 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-17 18:07:57,880 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-17 18:07:57,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-17 18:07:57,881 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-17 18:07:57,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-17 18:07:57,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-17 18:07:57,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-17 18:07:57,881 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-17 18:07:57,881 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-17 18:07:57,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-17 18:07:57,882 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-17 18:07:57,882 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-17 18:07:57,882 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-17 18:07:57,882 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-17 18:07:57,882 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-17 18:07:57,882 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-17 18:07:57,882 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-17 18:07:57,883 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-17 18:07:57,883 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 18:07:57,883 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-17 18:07:57,883 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-17 18:07:57,883 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-17 18:07:57,884 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-17 18:07:58,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-17 18:07:58,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-17 18:07:58,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-17 18:07:58,050 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-17 18:07:58,051 INFO L275 PluginConnector]: CDTParser initialized [2022-03-17 18:07:58,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_valuebound10.c [2022-03-17 18:07:58,111 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c5dd2bf5/57fe723967674f06b5d1b0feabc90ba7/FLAGbef0a9630 [2022-03-17 18:07:58,443 INFO L306 CDTParser]: Found 1 translation units. [2022-03-17 18:07:58,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_valuebound10.c [2022-03-17 18:07:58,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c5dd2bf5/57fe723967674f06b5d1b0feabc90ba7/FLAGbef0a9630 [2022-03-17 18:07:58,455 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7c5dd2bf5/57fe723967674f06b5d1b0feabc90ba7 [2022-03-17 18:07:58,457 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-17 18:07:58,458 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-17 18:07:58,461 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-17 18:07:58,461 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-17 18:07:58,463 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-17 18:07:58,463 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:07:58" (1/1) ... [2022-03-17 18:07:58,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@304a293b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:07:58, skipping insertion in model container [2022-03-17 18:07:58,464 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 06:07:58" (1/1) ... [2022-03-17 18:07:58,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-17 18:07:58,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-17 18:07:58,568 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_valuebound10.c[573,586] [2022-03-17 18:07:58,602 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 18:07:58,606 INFO L203 MainTranslator]: Completed pre-run [2022-03-17 18:07:58,616 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_valuebound10.c[573,586] [2022-03-17 18:07:58,625 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-17 18:07:58,636 INFO L208 MainTranslator]: Completed translation [2022-03-17 18:07:58,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:07:58 WrapperNode [2022-03-17 18:07:58,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-17 18:07:58,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-17 18:07:58,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-17 18:07:58,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-17 18:07:58,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:07:58" (1/1) ... [2022-03-17 18:07:58,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:07:58" (1/1) ... [2022-03-17 18:07:58,651 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:07:58" (1/1) ... [2022-03-17 18:07:58,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:07:58" (1/1) ... [2022-03-17 18:07:58,658 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:07:58" (1/1) ... [2022-03-17 18:07:58,661 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:07:58" (1/1) ... [2022-03-17 18:07:58,666 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:07:58" (1/1) ... [2022-03-17 18:07:58,671 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-17 18:07:58,672 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-17 18:07:58,672 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-17 18:07:58,672 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-17 18:07:58,674 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:07:58" (1/1) ... [2022-03-17 18:07:58,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-17 18:07:58,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:07:58,703 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-17 18:07:58,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-17 18:07:58,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-17 18:07:58,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-17 18:07:58,742 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-17 18:07:58,742 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-17 18:07:58,742 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-17 18:07:58,742 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-17 18:07:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-17 18:07:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-17 18:07:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-17 18:07:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-17 18:07:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-17 18:07:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-17 18:07:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-17 18:07:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-17 18:07:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-17 18:07:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-17 18:07:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-17 18:07:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-17 18:07:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-17 18:07:58,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-17 18:07:58,786 INFO L234 CfgBuilder]: Building ICFG [2022-03-17 18:07:58,787 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-17 18:07:58,868 INFO L275 CfgBuilder]: Performing block encoding [2022-03-17 18:07:58,872 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-17 18:07:58,875 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-17 18:07:58,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:07:58 BoogieIcfgContainer [2022-03-17 18:07:58,876 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-17 18:07:58,888 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-17 18:07:58,888 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-17 18:07:58,888 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-17 18:07:58,890 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:07:58" (1/1) ... [2022-03-17 18:07:58,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 06:07:58 BasicIcfg [2022-03-17 18:07:58,906 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-17 18:07:58,907 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-17 18:07:58,907 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-17 18:07:58,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-17 18:07:58,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 06:07:58" (1/4) ... [2022-03-17 18:07:58,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ecc2530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:07:58, skipping insertion in model container [2022-03-17 18:07:58,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 06:07:58" (2/4) ... [2022-03-17 18:07:58,909 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ecc2530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 06:07:58, skipping insertion in model container [2022-03-17 18:07:58,909 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.03 06:07:58" (3/4) ... [2022-03-17 18:07:58,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ecc2530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 06:07:58, skipping insertion in model container [2022-03-17 18:07:58,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 17.03 06:07:58" (4/4) ... [2022-03-17 18:07:58,919 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_valuebound10.cJordan [2022-03-17 18:07:58,923 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-17 18:07:58,923 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-17 18:07:58,956 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-17 18:07:58,960 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-17 18:07:58,961 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-17 18:07:58,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-17 18:07:58,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 18:07:58,986 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:07:58,986 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:07:58,987 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:07:58,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:07:58,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1058806997, now seen corresponding path program 1 times [2022-03-17 18:07:58,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:07:58,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729381843] [2022-03-17 18:07:58,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:07:58,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:07:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:07:59,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-17 18:07:59,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:07:59,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-17 18:07:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:07:59,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-03-17 18:07:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:07:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 18:07:59,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:07:59,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729381843] [2022-03-17 18:07:59,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729381843] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:07:59,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:07:59,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-17 18:07:59,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150706782] [2022-03-17 18:07:59,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:07:59,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-17 18:07:59,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:07:59,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-17 18:07:59,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 18:07:59,155 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 18:07:59,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:07:59,188 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-03-17 18:07:59,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-17 18:07:59,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-17 18:07:59,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:07:59,194 INFO L225 Difference]: With dead ends: 29 [2022-03-17 18:07:59,194 INFO L226 Difference]: Without dead ends: 24 [2022-03-17 18:07:59,195 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-17 18:07:59,197 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:07:59,198 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:07:59,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-03-17 18:07:59,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-03-17 18:07:59,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-17 18:07:59,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-03-17 18:07:59,218 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2022-03-17 18:07:59,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:07:59,219 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-03-17 18:07:59,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 18:07:59,219 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-03-17 18:07:59,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-17 18:07:59,220 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:07:59,220 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:07:59,220 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-17 18:07:59,220 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:07:59,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:07:59,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1056930164, now seen corresponding path program 1 times [2022-03-17 18:07:59,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:07:59,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683907961] [2022-03-17 18:07:59,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:07:59,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:07:59,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:07:59,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712327415] [2022-03-17 18:07:59,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:07:59,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:07:59,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:07:59,235 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:07:59,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-17 18:07:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:07:59,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-17 18:07:59,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:07:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-17 18:07:59,437 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-17 18:07:59,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:07:59,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683907961] [2022-03-17 18:07:59,437 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:07:59,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712327415] [2022-03-17 18:07:59,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712327415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-17 18:07:59,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-17 18:07:59,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-17 18:07:59,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275836520] [2022-03-17 18:07:59,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-17 18:07:59,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-17 18:07:59,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:07:59,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-17 18:07:59,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-17 18:07:59,440 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 18:07:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:07:59,515 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-03-17 18:07:59,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-17 18:07:59,516 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-17 18:07:59,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:07:59,517 INFO L225 Difference]: With dead ends: 33 [2022-03-17 18:07:59,517 INFO L226 Difference]: Without dead ends: 33 [2022-03-17 18:07:59,518 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-17 18:07:59,518 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-17 18:07:59,519 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 95 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-17 18:07:59,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-17 18:07:59,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2022-03-17 18:07:59,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-17 18:07:59,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-03-17 18:07:59,523 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2022-03-17 18:07:59,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:07:59,524 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-03-17 18:07:59,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-17 18:07:59,524 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-03-17 18:07:59,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-17 18:07:59,525 INFO L492 BasicCegarLoop]: Found error trace [2022-03-17 18:07:59,525 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-17 18:07:59,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-17 18:07:59,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:07:59,726 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-17 18:07:59,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-17 18:07:59,726 INFO L85 PathProgramCache]: Analyzing trace with hash -127181274, now seen corresponding path program 1 times [2022-03-17 18:07:59,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-17 18:07:59,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514241176] [2022-03-17 18:07:59,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:07:59,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-17 18:07:59,736 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-17 18:07:59,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [518137091] [2022-03-17 18:07:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-17 18:07:59,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-17 18:07:59,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-17 18:07:59,741 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-17 18:07:59,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-17 18:07:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-17 18:07:59,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-17 18:07:59,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-17 18:07:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 18:07:59,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-17 18:08:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-17 18:08:00,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-17 18:08:00,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514241176] [2022-03-17 18:08:00,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-17 18:08:00,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518137091] [2022-03-17 18:08:00,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518137091] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-17 18:08:00,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-17 18:08:00,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-17 18:08:00,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380495641] [2022-03-17 18:08:00,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-17 18:08:00,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-17 18:08:00,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-17 18:08:00,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-17 18:08:00,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-17 18:08:00,023 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 18:08:00,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-17 18:08:00,071 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-03-17 18:08:00,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-17 18:08:00,071 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 28 [2022-03-17 18:08:00,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-17 18:08:00,072 INFO L225 Difference]: With dead ends: 28 [2022-03-17 18:08:00,072 INFO L226 Difference]: Without dead ends: 0 [2022-03-17 18:08:00,073 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-03-17 18:08:00,075 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-17 18:08:00,077 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 126 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-17 18:08:00,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-17 18:08:00,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-17 18:08:00,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-17 18:08:00,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-17 18:08:00,080 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2022-03-17 18:08:00,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-17 18:08:00,080 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-17 18:08:00,080 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.0) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-17 18:08:00,080 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-17 18:08:00,080 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-17 18:08:00,082 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-17 18:08:00,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-17 18:08:00,294 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-17 18:08:00,297 INFO L718 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-03-17 18:08:00,297 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-17 18:08:00,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.03 06:08:00 BasicIcfg [2022-03-17 18:08:00,299 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-17 18:08:00,300 INFO L158 Benchmark]: Toolchain (without parser) took 1841.88ms. Allocated memory is still 216.0MB. Free memory was 167.3MB in the beginning and 106.8MB in the end (delta: 60.4MB). Peak memory consumption was 59.7MB. Max. memory is 8.0GB. [2022-03-17 18:08:00,300 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 216.0MB. Free memory is still 183.3MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-17 18:08:00,300 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.79ms. Allocated memory is still 216.0MB. Free memory was 167.1MB in the beginning and 194.4MB in the end (delta: -27.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-03-17 18:08:00,301 INFO L158 Benchmark]: Boogie Preprocessor took 33.08ms. Allocated memory is still 216.0MB. Free memory was 194.4MB in the beginning and 192.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 18:08:00,301 INFO L158 Benchmark]: RCFGBuilder took 204.12ms. Allocated memory is still 216.0MB. Free memory was 192.8MB in the beginning and 182.8MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-17 18:08:00,301 INFO L158 Benchmark]: IcfgTransformer took 18.30ms. Allocated memory is still 216.0MB. Free memory was 182.3MB in the beginning and 181.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-17 18:08:00,302 INFO L158 Benchmark]: TraceAbstraction took 1392.60ms. Allocated memory is still 216.0MB. Free memory was 180.7MB in the beginning and 106.8MB in the end (delta: 73.9MB). Peak memory consumption was 73.4MB. Max. memory is 8.0GB. [2022-03-17 18:08:00,303 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 216.0MB. Free memory is still 183.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 175.79ms. Allocated memory is still 216.0MB. Free memory was 167.1MB in the beginning and 194.4MB in the end (delta: -27.3MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.08ms. Allocated memory is still 216.0MB. Free memory was 194.4MB in the beginning and 192.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 204.12ms. Allocated memory is still 216.0MB. Free memory was 192.8MB in the beginning and 182.8MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * IcfgTransformer took 18.30ms. Allocated memory is still 216.0MB. Free memory was 182.3MB in the beginning and 181.3MB in the end (delta: 1.0MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 1392.60ms. Allocated memory is still 216.0MB. Free memory was 180.7MB in the beginning and 106.8MB in the end (delta: 73.9MB). Peak memory consumption was 73.4MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 52 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 46 mSDsluCounter, 252 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 188 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 115 IncrementalHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 64 mSDtfsCounter, 115 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=2, InterpolantAutomatonStates: 17, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 202 SizeOfPredicates, 10 NumberOfNonLiveVariables, 173 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 18/20 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-17 18:08:00,339 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...