/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 06:23:53,845 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 06:23:53,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 06:23:53,902 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 06:23:53,903 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 06:23:53,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 06:23:53,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 06:23:53,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 06:23:53,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 06:23:53,910 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 06:23:53,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 06:23:53,911 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 06:23:53,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 06:23:53,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 06:23:53,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 06:23:53,914 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 06:23:53,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 06:23:53,915 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 06:23:53,917 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 06:23:53,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 06:23:53,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 06:23:53,921 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 06:23:53,922 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 06:23:53,922 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 06:23:53,924 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 06:23:53,925 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 06:23:53,925 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 06:23:53,925 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 06:23:53,926 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 06:23:53,926 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 06:23:53,927 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 06:23:53,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 06:23:53,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 06:23:53,928 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 06:23:53,929 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 06:23:53,929 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 06:23:53,930 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 06:23:53,930 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 06:23:53,930 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 06:23:53,931 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 06:23:53,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 06:23:53,933 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-31 06:23:53,949 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 06:23:53,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 06:23:53,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 06:23:53,950 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 06:23:53,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 06:23:53,950 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 06:23:53,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 06:23:53,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 06:23:53,951 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 06:23:53,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 06:23:53,952 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 06:23:53,952 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 06:23:53,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 06:23:53,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 06:23:53,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 06:23:53,953 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 06:23:53,953 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 06:23:53,953 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 06:23:53,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 06:23:53,953 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 06:23:53,954 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 06:23:53,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 06:23:53,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 06:23:53,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 06:23:53,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 06:23:53,955 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 06:23:53,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 06:23:53,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 06:23:53,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 06:23:53,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 06:23:53,955 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 06:23:53,956 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 06:23:53,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 06:23:53,956 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 06:23:54,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 06:23:54,143 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 06:23:54,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 06:23:54,146 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 06:23:54,146 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 06:23:54,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound1.c [2022-01-31 06:23:54,200 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3642417de/9932d9b94c4f4160b49f3b09d9eb2922/FLAGbb9cb3da3 [2022-01-31 06:23:54,517 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 06:23:54,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound1.c [2022-01-31 06:23:54,534 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3642417de/9932d9b94c4f4160b49f3b09d9eb2922/FLAGbb9cb3da3 [2022-01-31 06:23:54,930 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3642417de/9932d9b94c4f4160b49f3b09d9eb2922 [2022-01-31 06:23:54,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 06:23:54,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 06:23:54,936 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 06:23:54,937 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 06:23:54,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 06:23:54,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:23:54" (1/1) ... [2022-01-31 06:23:54,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6360b49b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:23:54, skipping insertion in model container [2022-01-31 06:23:54,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:23:54" (1/1) ... [2022-01-31 06:23:54,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 06:23:54,963 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 06:23:55,091 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/sqrt1-ll_unwindbound1.c[520,533] [2022-01-31 06:23:55,121 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 06:23:55,127 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 06:23:55,135 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/sqrt1-ll_unwindbound1.c[520,533] [2022-01-31 06:23:55,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 06:23:55,150 INFO L208 MainTranslator]: Completed translation [2022-01-31 06:23:55,151 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:23:55 WrapperNode [2022-01-31 06:23:55,151 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 06:23:55,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 06:23:55,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 06:23:55,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 06:23:55,160 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:23:55" (1/1) ... [2022-01-31 06:23:55,160 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:23:55" (1/1) ... [2022-01-31 06:23:55,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:23:55" (1/1) ... [2022-01-31 06:23:55,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:23:55" (1/1) ... [2022-01-31 06:23:55,169 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:23:55" (1/1) ... [2022-01-31 06:23:55,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:23:55" (1/1) ... [2022-01-31 06:23:55,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:23:55" (1/1) ... [2022-01-31 06:23:55,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 06:23:55,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 06:23:55,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 06:23:55,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 06:23:55,177 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:23:55" (1/1) ... [2022-01-31 06:23:55,183 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 06:23:55,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 06:23:55,209 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) [2022-01-31 06:23:55,214 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 [2022-01-31 06:23:55,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 06:23:55,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 06:23:55,242 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 06:23:55,242 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 06:23:55,242 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 06:23:55,242 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 06:23:55,242 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 06:23:55,242 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 06:23:55,242 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 06:23:55,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 06:23:55,243 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 06:23:55,243 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 06:23:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 06:23:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 06:23:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 06:23:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 06:23:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 06:23:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 06:23:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 06:23:55,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 06:23:55,302 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 06:23:55,304 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 06:23:55,387 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 06:23:55,392 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 06:23:55,393 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 06:23:55,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:23:55 BoogieIcfgContainer [2022-01-31 06:23:55,394 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 06:23:55,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 06:23:55,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 06:23:55,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 06:23:55,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 06:23:54" (1/3) ... [2022-01-31 06:23:55,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449d4b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:23:55, skipping insertion in model container [2022-01-31 06:23:55,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:23:55" (2/3) ... [2022-01-31 06:23:55,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@449d4b75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:23:55, skipping insertion in model container [2022-01-31 06:23:55,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:23:55" (3/3) ... [2022-01-31 06:23:55,401 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound1.c [2022-01-31 06:23:55,405 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 06:23:55,405 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 06:23:55,441 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 06:23:55,446 INFO L339 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=PETRI_NET, 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 06:23:55,447 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 06:23:55,459 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 06:23:55,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 06:23:55,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 06:23:55,463 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 06:23:55,464 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 06:23:55,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 06:23:55,468 INFO L85 PathProgramCache]: Analyzing trace with hash -643130361, now seen corresponding path program 1 times [2022-01-31 06:23:55,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 06:23:55,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514887886] [2022-01-31 06:23:55,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:23:55,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 06:23:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:23:55,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 06:23:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:23:55,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 06:23:55,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 06:23:55,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514887886] [2022-01-31 06:23:55,671 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514887886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 06:23:55,671 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 06:23:55,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 06:23:55,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762584531] [2022-01-31 06:23:55,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 06:23:55,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 06:23:55,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 06:23:55,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 06:23:55,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 06:23:55,710 INFO L87 Difference]: Start difference. First operand has 26 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 06:23:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 06:23:55,813 INFO L93 Difference]: Finished difference Result 47 states and 70 transitions. [2022-01-31 06:23:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 06:23:55,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 06:23:55,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 06:23:55,822 INFO L225 Difference]: With dead ends: 47 [2022-01-31 06:23:55,822 INFO L226 Difference]: Without dead ends: 22 [2022-01-31 06:23:55,826 INFO L932 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 [2022-01-31 06:23:55,832 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 06:23:55,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 06:23:55,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-31 06:23:55,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-01-31 06:23:55,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 06:23:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-01-31 06:23:55,879 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 11 [2022-01-31 06:23:55,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 06:23:55,879 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-01-31 06:23:55,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 06:23:55,880 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-01-31 06:23:55,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 06:23:55,881 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 06:23:55,882 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 06:23:55,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 06:23:55,883 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 06:23:55,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 06:23:55,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1070997212, now seen corresponding path program 1 times [2022-01-31 06:23:55,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 06:23:55,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496241974] [2022-01-31 06:23:55,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:23:55,891 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 06:23:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:23:55,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 06:23:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:23:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 06:23:56,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 06:23:56,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496241974] [2022-01-31 06:23:56,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496241974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 06:23:56,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 06:23:56,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 06:23:56,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879632004] [2022-01-31 06:23:56,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 06:23:56,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 06:23:56,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 06:23:56,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 06:23:56,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 06:23:56,007 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 06:23:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 06:23:56,087 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-01-31 06:23:56,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 06:23:56,088 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 06:23:56,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 06:23:56,089 INFO L225 Difference]: With dead ends: 32 [2022-01-31 06:23:56,089 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 06:23:56,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 06:23:56,094 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 06:23:56,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 06:23:56,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 06:23:56,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-01-31 06:23:56,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 12 states have (on average 1.25) internal successors, (15), 13 states have internal predecessors, (15), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 06:23:56,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-01-31 06:23:56,106 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 12 [2022-01-31 06:23:56,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 06:23:56,108 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-01-31 06:23:56,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 06:23:56,110 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-01-31 06:23:56,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-01-31 06:23:56,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 06:23:56,116 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 06:23:56,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 06:23:56,117 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 06:23:56,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 06:23:56,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1072665508, now seen corresponding path program 1 times [2022-01-31 06:23:56,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 06:23:56,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830399017] [2022-01-31 06:23:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:23:56,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 06:23:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:23:56,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 06:23:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:23:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 06:23:56,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 06:23:56,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830399017] [2022-01-31 06:23:56,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830399017] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 06:23:56,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 06:23:56,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 06:23:56,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326828310] [2022-01-31 06:23:56,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 06:23:56,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 06:23:56,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 06:23:56,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 06:23:56,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 06:23:56,227 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 06:23:56,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 06:23:56,371 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-01-31 06:23:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 06:23:56,372 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-01-31 06:23:56,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 06:23:56,373 INFO L225 Difference]: With dead ends: 36 [2022-01-31 06:23:56,373 INFO L226 Difference]: Without dead ends: 34 [2022-01-31 06:23:56,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 06:23:56,375 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 06:23:56,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 06:23:56,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-01-31 06:23:56,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2022-01-31 06:23:56,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 06:23:56,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-01-31 06:23:56,384 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 12 [2022-01-31 06:23:56,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 06:23:56,384 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-01-31 06:23:56,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 06:23:56,385 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-01-31 06:23:56,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 06:23:56,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 06:23:56,385 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 06:23:56,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 06:23:56,386 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 06:23:56,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 06:23:56,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1640566567, now seen corresponding path program 1 times [2022-01-31 06:23:56,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 06:23:56,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932872195] [2022-01-31 06:23:56,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:23:56,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 06:23:56,398 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 06:23:56,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [102896047] [2022-01-31 06:23:56,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:23:56,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 06:23:56,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 06:23:56,407 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) [2022-01-31 06:23:56,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 06:23:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:23:56,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 06:23:56,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 06:23:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 06:23:56,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 06:23:56,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 06:23:56,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932872195] [2022-01-31 06:23:56,535 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 06:23:56,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102896047] [2022-01-31 06:23:56,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102896047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 06:23:56,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 06:23:56,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 06:23:56,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303391320] [2022-01-31 06:23:56,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 06:23:56,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 06:23:56,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 06:23:56,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 06:23:56,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 06:23:56,537 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 06:23:56,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 06:23:56,569 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-01-31 06:23:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 06:23:56,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2022-01-31 06:23:56,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 06:23:56,570 INFO L225 Difference]: With dead ends: 40 [2022-01-31 06:23:56,571 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 06:23:56,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 06:23:56,572 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 06:23:56,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 06:23:56,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 06:23:56,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-01-31 06:23:56,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 06:23:56,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2022-01-31 06:23:56,579 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 17 [2022-01-31 06:23:56,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 06:23:56,580 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2022-01-31 06:23:56,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 06:23:56,580 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2022-01-31 06:23:56,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 06:23:56,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 06:23:56,581 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 06:23:56,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 06:23:56,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 06:23:56,805 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 06:23:56,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 06:23:56,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1129080132, now seen corresponding path program 1 times [2022-01-31 06:23:56,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 06:23:56,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105225289] [2022-01-31 06:23:56,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:23:56,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 06:23:56,815 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 06:23:56,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1923731184] [2022-01-31 06:23:56,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:23:56,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 06:23:56,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 06:23:56,818 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) [2022-01-31 06:23:56,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 06:23:56,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:23:56,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 06:23:56,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 06:23:56,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 06:23:56,944 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 06:23:56,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 06:23:56,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105225289] [2022-01-31 06:23:56,944 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 06:23:56,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923731184] [2022-01-31 06:23:56,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923731184] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 06:23:56,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 06:23:56,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 06:23:56,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349437149] [2022-01-31 06:23:56,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 06:23:56,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 06:23:56,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 06:23:56,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 06:23:56,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 06:23:56,946 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 06:23:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 06:23:56,977 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-01-31 06:23:56,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 06:23:56,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-31 06:23:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 06:23:56,979 INFO L225 Difference]: With dead ends: 44 [2022-01-31 06:23:56,979 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 06:23:56,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 06:23:56,980 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 6 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 06:23:56,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 109 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 06:23:56,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 06:23:56,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-01-31 06:23:56,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 06:23:56,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-01-31 06:23:56,992 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2022-01-31 06:23:56,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 06:23:56,992 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-01-31 06:23:56,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 06:23:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-01-31 06:23:56,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 06:23:56,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 06:23:56,994 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 06:23:57,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 06:23:57,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 06:23:57,216 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 06:23:57,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 06:23:57,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1326533350, now seen corresponding path program 1 times [2022-01-31 06:23:57,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 06:23:57,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057721844] [2022-01-31 06:23:57,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:23:57,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 06:23:57,226 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 06:23:57,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042516842] [2022-01-31 06:23:57,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:23:57,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 06:23:57,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 06:23:57,228 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 06:23:57,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 06:23:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:23:57,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 06:23:57,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 06:23:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 06:23:57,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 06:23:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 06:23:57,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 06:23:57,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057721844] [2022-01-31 06:23:57,481 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 06:23:57,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042516842] [2022-01-31 06:23:57,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042516842] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 06:23:57,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 06:23:57,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-01-31 06:23:57,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255237190] [2022-01-31 06:23:57,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 06:23:57,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 06:23:57,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 06:23:57,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 06:23:57,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 06:23:57,485 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 06:23:57,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 06:23:57,542 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2022-01-31 06:23:57,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 06:23:57,542 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 30 [2022-01-31 06:23:57,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 06:23:57,544 INFO L225 Difference]: With dead ends: 45 [2022-01-31 06:23:57,544 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 06:23:57,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 06:23:57,547 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 06:23:57,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 74 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 06:23:57,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 06:23:57,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-01-31 06:23:57,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 06:23:57,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-01-31 06:23:57,557 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 30 [2022-01-31 06:23:57,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 06:23:57,558 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-01-31 06:23:57,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 06:23:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-01-31 06:23:57,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 06:23:57,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 06:23:57,559 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 06:23:57,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 06:23:57,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 06:23:57,773 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 06:23:57,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 06:23:57,774 INFO L85 PathProgramCache]: Analyzing trace with hash -775311695, now seen corresponding path program 1 times [2022-01-31 06:23:57,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 06:23:57,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762599248] [2022-01-31 06:23:57,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:23:57,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 06:23:57,787 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 06:23:57,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [261144726] [2022-01-31 06:23:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:23:57,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 06:23:57,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 06:23:57,789 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 06:23:57,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 06:23:57,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:23:57,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 06:23:57,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 06:23:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 06:23:57,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 06:23:58,087 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 06:23:58,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 06:23:58,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762599248] [2022-01-31 06:23:58,087 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 06:23:58,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261144726] [2022-01-31 06:23:58,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261144726] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 06:23:58,088 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 06:23:58,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-01-31 06:23:58,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323717861] [2022-01-31 06:23:58,088 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 06:23:58,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 06:23:58,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 06:23:58,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 06:23:58,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-31 06:23:58,091 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-31 06:23:58,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 06:23:58,212 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2022-01-31 06:23:58,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 06:23:58,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 35 [2022-01-31 06:23:58,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 06:23:58,213 INFO L225 Difference]: With dead ends: 52 [2022-01-31 06:23:58,213 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 06:23:58,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-31 06:23:58,214 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 14 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 06:23:58,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 118 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 06:23:58,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 06:23:58,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 06:23:58,215 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) [2022-01-31 06:23:58,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 06:23:58,215 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2022-01-31 06:23:58,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 06:23:58,216 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 06:23:58,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-01-31 06:23:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 06:23:58,216 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 06:23:58,218 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 06:23:58,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 06:23:58,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 06:23:58,429 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-31 06:23:58,643 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-01-31 06:23:58,643 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-01-31 06:23:58,643 INFO L858 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-01-31 06:23:58,643 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notENTRY(lines 8 10) no Hoare annotation was computed. [2022-01-31 06:23:58,643 INFO L858 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2022-01-31 06:23:58,643 INFO L858 garLoopResultBuilder]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2022-01-31 06:23:58,644 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2022-01-31 06:23:58,644 INFO L858 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2022-01-31 06:23:58,644 INFO L854 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-01-31 06:23:58,644 INFO L854 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-01-31 06:23:58,644 INFO L858 garLoopResultBuilder]: For program point mainEXIT(lines 21 49) no Hoare annotation was computed. [2022-01-31 06:23:58,644 INFO L858 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-01-31 06:23:58,644 INFO L858 garLoopResultBuilder]: For program point mainFINAL(lines 21 49) no Hoare annotation was computed. [2022-01-31 06:23:58,644 INFO L854 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-01-31 06:23:58,645 INFO L854 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-01-31 06:23:58,645 INFO L854 garLoopResultBuilder]: At program point mainENTRY(lines 21 49) the Hoare annotation is: (or (= ~counter~0 0) (not (= |old(~counter~0)| 0))) [2022-01-31 06:23:58,645 INFO L858 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2022-01-31 06:23:58,645 INFO L854 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-01-31 06:23:58,645 INFO L854 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (not (= |old(~counter~0)| 0))) [2022-01-31 06:23:58,645 INFO L854 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (and (= main_~t~0 1) (= main_~s~0 1)) (not (= |old(~counter~0)| 0))) [2022-01-31 06:23:58,645 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-01-31 06:23:58,645 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= ~counter~0 |old(~counter~0)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-01-31 06:23:58,645 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-01-31 06:23:58,645 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-01-31 06:23:58,646 INFO L854 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: (= ~counter~0 0) [2022-01-31 06:23:58,646 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-01-31 06:23:58,646 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-01-31 06:23:58,646 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-01-31 06:23:58,646 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-01-31 06:23:58,646 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-01-31 06:23:58,646 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-01-31 06:23:58,646 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-01-31 06:23:58,646 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-01-31 06:23:58,649 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-01-31 06:23:58,650 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 06:23:58,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 06:23:58 BoogieIcfgContainer [2022-01-31 06:23:58,664 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 06:23:58,665 INFO L158 Benchmark]: Toolchain (without parser) took 3730.91ms. Allocated memory was 184.5MB in the beginning and 235.9MB in the end (delta: 51.4MB). Free memory was 128.6MB in the beginning and 172.9MB in the end (delta: -44.4MB). Peak memory consumption was 7.4MB. Max. memory is 8.0GB. [2022-01-31 06:23:58,665 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 184.5MB. Free memory is still 144.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 06:23:58,665 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.64ms. Allocated memory was 184.5MB in the beginning and 235.9MB in the end (delta: 51.4MB). Free memory was 128.3MB in the beginning and 208.1MB in the end (delta: -79.8MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. [2022-01-31 06:23:58,665 INFO L158 Benchmark]: Boogie Preprocessor took 23.00ms. Allocated memory is still 235.9MB. Free memory was 208.1MB in the beginning and 207.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 06:23:58,666 INFO L158 Benchmark]: RCFGBuilder took 218.93ms. Allocated memory is still 235.9MB. Free memory was 206.5MB in the beginning and 195.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 06:23:58,666 INFO L158 Benchmark]: TraceAbstraction took 3268.36ms. Allocated memory is still 235.9MB. Free memory was 195.0MB in the beginning and 172.9MB in the end (delta: 22.1MB). Peak memory consumption was 22.6MB. Max. memory is 8.0GB. [2022-01-31 06:23:58,667 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 184.5MB. Free memory is still 144.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 214.64ms. Allocated memory was 184.5MB in the beginning and 235.9MB in the end (delta: 51.4MB). Free memory was 128.3MB in the beginning and 208.1MB in the end (delta: -79.8MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.00ms. Allocated memory is still 235.9MB. Free memory was 208.1MB in the beginning and 207.0MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 218.93ms. Allocated memory is still 235.9MB. Free memory was 206.5MB in the beginning and 195.5MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 3268.36ms. Allocated memory is still 235.9MB. Free memory was 195.0MB in the beginning and 172.9MB in the end (delta: 22.1MB). Peak memory consumption was 22.6MB. 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: 14]: 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 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.2s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 74 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 60 mSDsluCounter, 550 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 364 mSDsCounter, 64 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 285 IncrementalHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 64 mSolverCounterUnsat, 186 mSDtfsCounter, 285 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 193 GetRequests, 154 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=6, InterpolantAutomatonStates: 39, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 38 PreInvPairs, 59 NumberOfFragments, 205 HoareAnnotationTreeSize, 38 FomulaSimplifications, 4 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 12 FomulaSimplificationsInter, 480 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 139 NumberOfCodeBlocks, 139 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 195 ConstructedInterpolants, 0 QuantifiedInterpolants, 700 SizeOfPredicates, 5 NumberOfNonLiveVariables, 398 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 9 InterpolantComputations, 6 PerfectInterpolantSequences, 112/118 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: (t + s == a * 4 + 2 + a * a && t == a * 2 + 1) || !(\old(counter) == 0) RESULT: Ultimate proved your program to be correct! [2022-01-31 06:23:58,681 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...