./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dad54faad409a509f8fe160c736fa981b1b72909c611eb2d7f09e49e6ca0dfcb --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 15:44:50,960 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 15:44:50,963 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 15:44:51,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 15:44:51,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 15:44:51,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 15:44:51,010 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 15:44:51,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 15:44:51,013 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 15:44:51,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 15:44:51,015 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 15:44:51,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 15:44:51,017 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 15:44:51,018 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 15:44:51,019 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 15:44:51,020 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 15:44:51,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 15:44:51,021 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 15:44:51,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 15:44:51,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 15:44:51,026 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 15:44:51,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 15:44:51,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 15:44:51,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 15:44:51,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 15:44:51,032 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 15:44:51,032 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 15:44:51,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 15:44:51,034 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 15:44:51,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 15:44:51,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 15:44:51,036 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 15:44:51,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 15:44:51,038 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 15:44:51,039 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 15:44:51,040 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 15:44:51,041 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 15:44:51,041 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 15:44:51,041 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 15:44:51,042 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 15:44:51,042 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 15:44:51,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 15:44:51,044 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 15:44:51,071 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 15:44:51,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 15:44:51,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 15:44:51,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 15:44:51,073 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 15:44:51,073 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 15:44:51,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 15:44:51,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 15:44:51,076 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 15:44:51,077 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 15:44:51,077 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 15:44:51,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 15:44:51,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 15:44:51,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 15:44:51,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 15:44:51,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 15:44:51,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 15:44:51,078 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 15:44:51,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 15:44:51,079 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 15:44:51,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 15:44:51,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 15:44:51,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 15:44:51,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 15:44:51,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:44:51,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 15:44:51,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 15:44:51,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 15:44:51,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 15:44:51,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 15:44:51,081 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 15:44:51,082 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 15:44:51,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 15:44:51,082 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dad54faad409a509f8fe160c736fa981b1b72909c611eb2d7f09e49e6ca0dfcb [2022-07-19 15:44:51,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 15:44:51,351 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 15:44:51,355 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 15:44:51,356 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 15:44:51,357 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 15:44:51,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound2.c [2022-07-19 15:44:51,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c11043e1/1b54018a56eb4efea8b244df8259231b/FLAG19d4a4eaa [2022-07-19 15:44:51,808 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 15:44:51,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound2.c [2022-07-19 15:44:51,813 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c11043e1/1b54018a56eb4efea8b244df8259231b/FLAG19d4a4eaa [2022-07-19 15:44:52,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c11043e1/1b54018a56eb4efea8b244df8259231b [2022-07-19 15:44:52,220 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 15:44:52,221 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 15:44:52,223 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 15:44:52,223 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 15:44:52,233 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 15:44:52,234 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:44:52" (1/1) ... [2022-07-19 15:44:52,235 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cf019f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:44:52, skipping insertion in model container [2022-07-19 15:44:52,235 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:44:52" (1/1) ... [2022-07-19 15:44:52,242 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 15:44:52,259 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 15:44:52,399 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound2.c[489,502] [2022-07-19 15:44:52,433 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:44:52,443 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 15:44:52,457 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd-ll_unwindbound2.c[489,502] [2022-07-19 15:44:52,479 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:44:52,493 INFO L208 MainTranslator]: Completed translation [2022-07-19 15:44:52,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:44:52 WrapperNode [2022-07-19 15:44:52,493 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 15:44:52,494 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 15:44:52,494 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 15:44:52,495 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 15:44:52,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:44:52" (1/1) ... [2022-07-19 15:44:52,512 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:44:52" (1/1) ... [2022-07-19 15:44:52,537 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 59 [2022-07-19 15:44:52,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 15:44:52,539 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 15:44:52,539 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 15:44:52,539 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 15:44:52,546 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:44:52" (1/1) ... [2022-07-19 15:44:52,546 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:44:52" (1/1) ... [2022-07-19 15:44:52,548 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:44:52" (1/1) ... [2022-07-19 15:44:52,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:44:52" (1/1) ... [2022-07-19 15:44:52,551 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:44:52" (1/1) ... [2022-07-19 15:44:52,554 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:44:52" (1/1) ... [2022-07-19 15:44:52,555 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:44:52" (1/1) ... [2022-07-19 15:44:52,557 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 15:44:52,558 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 15:44:52,558 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 15:44:52,558 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 15:44:52,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:44:52" (1/1) ... [2022-07-19 15:44:52,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:44:52,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:44:52,589 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) [2022-07-19 15:44:52,590 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 [2022-07-19 15:44:52,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 15:44:52,618 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-19 15:44:52,619 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-19 15:44:52,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 15:44:52,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 15:44:52,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 15:44:52,619 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-19 15:44:52,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-19 15:44:52,667 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 15:44:52,668 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 15:44:52,780 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 15:44:52,788 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 15:44:52,788 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 15:44:52,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:44:52 BoogieIcfgContainer [2022-07-19 15:44:52,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 15:44:52,810 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 15:44:52,810 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 15:44:52,813 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 15:44:52,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 03:44:52" (1/3) ... [2022-07-19 15:44:52,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5027374c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:44:52, skipping insertion in model container [2022-07-19 15:44:52,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:44:52" (2/3) ... [2022-07-19 15:44:52,815 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5027374c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:44:52, skipping insertion in model container [2022-07-19 15:44:52,815 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:44:52" (3/3) ... [2022-07-19 15:44:52,816 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_unwindbound2.c [2022-07-19 15:44:52,831 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 15:44:52,831 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 15:44:52,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 15:44:52,942 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2f185bf4, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@24818047 [2022-07-19 15:44:52,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 15:44:52,948 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-19 15:44:52,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 15:44:52,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:44:52,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:44:52,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:44:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:44:52,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1165920622, now seen corresponding path program 1 times [2022-07-19 15:44:52,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:44:52,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085203937] [2022-07-19 15:44:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:52,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:44:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:44:53,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 15:44:53,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:44:53,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:44:53,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:44:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:44:53,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:44:53,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085203937] [2022-07-19 15:44:53,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085203937] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:44:53,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:44:53,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 15:44:53,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831708297] [2022-07-19 15:44:53,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:44:53,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 15:44:53,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:44:53,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 15:44:53,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:44:53,186 INFO L87 Difference]: Start difference. First operand has 30 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 15:44:53,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:44:53,205 INFO L93 Difference]: Finished difference Result 57 states and 89 transitions. [2022-07-19 15:44:53,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 15:44:53,207 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-19 15:44:53,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:44:53,221 INFO L225 Difference]: With dead ends: 57 [2022-07-19 15:44:53,222 INFO L226 Difference]: Without dead ends: 26 [2022-07-19 15:44:53,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:44:53,228 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:44:53,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:44:53,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-19 15:44:53,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-19 15:44:53,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-19 15:44:53,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-07-19 15:44:53,265 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 18 [2022-07-19 15:44:53,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:44:53,266 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-07-19 15:44:53,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 15:44:53,266 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-07-19 15:44:53,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 15:44:53,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:44:53,268 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:44:53,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 15:44:53,269 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:44:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:44:53,270 INFO L85 PathProgramCache]: Analyzing trace with hash -542319922, now seen corresponding path program 1 times [2022-07-19 15:44:53,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:44:53,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472827288] [2022-07-19 15:44:53,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:53,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:44:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:44:53,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 15:44:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:44:53,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 15:44:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:44:53,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:44:53,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:44:53,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472827288] [2022-07-19 15:44:53,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472827288] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:44:53,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:44:53,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 15:44:53,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975809892] [2022-07-19 15:44:53,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:44:53,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 15:44:53,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:44:53,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 15:44:53,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:44:53,368 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:44:53,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:44:53,390 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2022-07-19 15:44:53,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 15:44:53,391 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-19 15:44:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:44:53,392 INFO L225 Difference]: With dead ends: 38 [2022-07-19 15:44:53,393 INFO L226 Difference]: Without dead ends: 28 [2022-07-19 15:44:53,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:44:53,394 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 5 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:44:53,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 87 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:44:53,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-19 15:44:53,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-07-19 15:44:53,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-19 15:44:53,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-07-19 15:44:53,403 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 19 [2022-07-19 15:44:53,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:44:53,405 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-07-19 15:44:53,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:44:53,406 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-07-19 15:44:53,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 15:44:53,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:44:53,407 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:44:53,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 15:44:53,407 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:44:53,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:44:53,408 INFO L85 PathProgramCache]: Analyzing trace with hash -540651626, now seen corresponding path program 1 times [2022-07-19 15:44:53,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:44:53,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38568524] [2022-07-19 15:44:53,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:53,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:44:53,426 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:44:53,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [708318151] [2022-07-19 15:44:53,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:53,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:44:53,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:44:53,429 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) [2022-07-19 15:44:53,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 15:44:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:44:53,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 15:44:53,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:44:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:44:53,619 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:44:53,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:44:53,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38568524] [2022-07-19 15:44:53,620 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:44:53,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708318151] [2022-07-19 15:44:53,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708318151] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:44:53,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:44:53,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:44:53,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461669280] [2022-07-19 15:44:53,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:44:53,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:44:53,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:44:53,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:44:53,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:44:53,623 INFO L87 Difference]: Start difference. First operand 28 states and 37 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:44:53,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:44:53,720 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2022-07-19 15:44:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:44:53,721 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-19 15:44:53,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:44:53,723 INFO L225 Difference]: With dead ends: 45 [2022-07-19 15:44:53,725 INFO L226 Difference]: Without dead ends: 43 [2022-07-19 15:44:53,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:44:53,727 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:44:53,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 122 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:44:53,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-19 15:44:53,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-07-19 15:44:53,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 25 states have internal predecessors, (30), 15 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-19 15:44:53,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 59 transitions. [2022-07-19 15:44:53,745 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 59 transitions. Word has length 19 [2022-07-19 15:44:53,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:44:53,745 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 59 transitions. [2022-07-19 15:44:53,746 INFO L496 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 15:44:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 59 transitions. [2022-07-19 15:44:53,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 15:44:53,747 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:44:53,747 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:44:53,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 15:44:53,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:44:53,972 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:44:53,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:44:53,972 INFO L85 PathProgramCache]: Analyzing trace with hash -276555716, now seen corresponding path program 1 times [2022-07-19 15:44:53,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:44:53,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792665100] [2022-07-19 15:44:53,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:53,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:44:53,986 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:44:53,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140477233] [2022-07-19 15:44:53,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:53,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:44:53,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:44:53,989 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) [2022-07-19 15:44:53,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 15:44:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:44:54,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 15:44:54,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:44:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:44:54,156 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:44:54,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:44:54,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792665100] [2022-07-19 15:44:54,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:44:54,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140477233] [2022-07-19 15:44:54,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140477233] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:44:54,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:44:54,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 15:44:54,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492094264] [2022-07-19 15:44:54,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:44:54,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 15:44:54,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:44:54,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 15:44:54,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:44:54,160 INFO L87 Difference]: Start difference. First operand 42 states and 59 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 15:44:54,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:44:54,289 INFO L93 Difference]: Finished difference Result 49 states and 65 transitions. [2022-07-19 15:44:54,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 15:44:54,289 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-07-19 15:44:54,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:44:54,291 INFO L225 Difference]: With dead ends: 49 [2022-07-19 15:44:54,291 INFO L226 Difference]: Without dead ends: 47 [2022-07-19 15:44:54,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:44:54,292 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:44:54,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 156 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:44:54,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-19 15:44:54,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-07-19 15:44:54,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 28 states have internal predecessors, (33), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-19 15:44:54,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2022-07-19 15:44:54,303 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 24 [2022-07-19 15:44:54,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:44:54,303 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2022-07-19 15:44:54,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 15:44:54,304 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2022-07-19 15:44:54,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 15:44:54,304 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:44:54,305 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:44:54,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 15:44:54,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 15:44:54,520 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:44:54,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:44:54,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1836785898, now seen corresponding path program 1 times [2022-07-19 15:44:54,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:44:54,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356288679] [2022-07-19 15:44:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:54,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:44:54,534 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:44:54,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915995555] [2022-07-19 15:44:54,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:54,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:44:54,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:44:54,552 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) [2022-07-19 15:44:54,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 15:44:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:44:54,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 15:44:54,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:44:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:44:54,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:44:54,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:44:54,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356288679] [2022-07-19 15:44:54,758 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:44:54,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915995555] [2022-07-19 15:44:54,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915995555] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:44:54,759 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:44:54,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-19 15:44:54,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007499368] [2022-07-19 15:44:54,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:44:54,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 15:44:54,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:44:54,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 15:44:54,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:44:54,761 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 15:44:54,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:44:54,902 INFO L93 Difference]: Finished difference Result 71 states and 103 transitions. [2022-07-19 15:44:54,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 15:44:54,902 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-07-19 15:44:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:44:54,905 INFO L225 Difference]: With dead ends: 71 [2022-07-19 15:44:54,905 INFO L226 Difference]: Without dead ends: 67 [2022-07-19 15:44:54,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:44:54,907 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 39 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:44:54,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 134 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:44:54,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-19 15:44:54,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-07-19 15:44:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 39 states have internal predecessors, (47), 26 states have call successors, (26), 5 states have call predecessors, (26), 5 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-07-19 15:44:54,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 96 transitions. [2022-07-19 15:44:54,921 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 96 transitions. Word has length 29 [2022-07-19 15:44:54,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:44:54,922 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 96 transitions. [2022-07-19 15:44:54,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 15:44:54,922 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 96 transitions. [2022-07-19 15:44:54,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 15:44:54,923 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:44:54,923 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:44:54,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 15:44:55,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:44:55,141 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:44:55,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:44:55,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1071030291, now seen corresponding path program 1 times [2022-07-19 15:44:55,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:44:55,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330990989] [2022-07-19 15:44:55,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:55,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:44:55,154 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:44:55,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316806184] [2022-07-19 15:44:55,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:55,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:44:55,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:44:55,158 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) [2022-07-19 15:44:55,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 15:44:55,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:44:55,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 15:44:55,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:44:55,234 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 15:44:55,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:44:55,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:44:55,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330990989] [2022-07-19 15:44:55,235 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:44:55,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316806184] [2022-07-19 15:44:55,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316806184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:44:55,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:44:55,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:44:55,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536060752] [2022-07-19 15:44:55,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:44:55,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:44:55,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:44:55,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:44:55,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:44:55,237 INFO L87 Difference]: Start difference. First operand 67 states and 96 transitions. Second operand has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-19 15:44:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:44:55,294 INFO L93 Difference]: Finished difference Result 83 states and 119 transitions. [2022-07-19 15:44:55,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:44:55,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 35 [2022-07-19 15:44:55,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:44:55,296 INFO L225 Difference]: With dead ends: 83 [2022-07-19 15:44:55,297 INFO L226 Difference]: Without dead ends: 81 [2022-07-19 15:44:55,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:44:55,298 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 5 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:44:55,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 128 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:44:55,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-07-19 15:44:55,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2022-07-19 15:44:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 45 states have internal predecessors, (50), 29 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-19 15:44:55,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 105 transitions. [2022-07-19 15:44:55,321 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 105 transitions. Word has length 35 [2022-07-19 15:44:55,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:44:55,321 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 105 transitions. [2022-07-19 15:44:55,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-07-19 15:44:55,322 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 105 transitions. [2022-07-19 15:44:55,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 15:44:55,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:44:55,323 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:44:55,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 15:44:55,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:44:55,538 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:44:55,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:44:55,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1689492770, now seen corresponding path program 1 times [2022-07-19 15:44:55,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:44:55,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458127630] [2022-07-19 15:44:55,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:55,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:44:55,549 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:44:55,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508377303] [2022-07-19 15:44:55,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:55,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:44:55,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:44:55,552 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:44:55,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 15:44:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:44:55,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 15:44:55,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:44:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 15:44:55,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:44:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 15:44:55,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:44:55,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458127630] [2022-07-19 15:44:55,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:44:55,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508377303] [2022-07-19 15:44:55,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508377303] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:44:55,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:44:55,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2022-07-19 15:44:55,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261007797] [2022-07-19 15:44:55,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:44:55,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:44:55,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:44:55,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:44:55,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:44:55,703 INFO L87 Difference]: Start difference. First operand 74 states and 105 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 15:44:55,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:44:55,745 INFO L93 Difference]: Finished difference Result 117 states and 148 transitions. [2022-07-19 15:44:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:44:55,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 38 [2022-07-19 15:44:55,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:44:55,747 INFO L225 Difference]: With dead ends: 117 [2022-07-19 15:44:55,747 INFO L226 Difference]: Without dead ends: 98 [2022-07-19 15:44:55,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:44:55,748 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:44:55,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 108 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:44:55,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-19 15:44:55,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2022-07-19 15:44:55,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 56 states have (on average 1.2142857142857142) internal successors, (68), 62 states have internal predecessors, (68), 29 states have call successors, (29), 11 states have call predecessors, (29), 10 states have return successors, (26), 22 states have call predecessors, (26), 26 states have call successors, (26) [2022-07-19 15:44:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 123 transitions. [2022-07-19 15:44:55,762 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 123 transitions. Word has length 38 [2022-07-19 15:44:55,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:44:55,762 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 123 transitions. [2022-07-19 15:44:55,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-19 15:44:55,763 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 123 transitions. [2022-07-19 15:44:55,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 15:44:55,764 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:44:55,764 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:44:55,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 15:44:55,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:44:55,984 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:44:55,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:44:55,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1691161066, now seen corresponding path program 1 times [2022-07-19 15:44:55,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:44:55,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923615962] [2022-07-19 15:44:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:55,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:44:55,998 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:44:55,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1205601895] [2022-07-19 15:44:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:56,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:44:56,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:44:56,008 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:44:56,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 15:44:56,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:44:56,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 15:44:56,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:44:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 15:44:56,161 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:44:56,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:44:56,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923615962] [2022-07-19 15:44:56,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:44:56,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205601895] [2022-07-19 15:44:56,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1205601895] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:44:56,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:44:56,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:44:56,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027279531] [2022-07-19 15:44:56,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:44:56,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:44:56,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:44:56,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:44:56,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:44:56,165 INFO L87 Difference]: Start difference. First operand 96 states and 123 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 15:44:56,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:44:56,209 INFO L93 Difference]: Finished difference Result 102 states and 128 transitions. [2022-07-19 15:44:56,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:44:56,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-07-19 15:44:56,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:44:56,213 INFO L225 Difference]: With dead ends: 102 [2022-07-19 15:44:56,214 INFO L226 Difference]: Without dead ends: 99 [2022-07-19 15:44:56,214 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:44:56,215 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:44:56,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 116 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:44:56,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-19 15:44:56,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-07-19 15:44:56,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 65 states have internal predecessors, (71), 28 states have call successors, (28), 12 states have call predecessors, (28), 11 states have return successors, (25), 21 states have call predecessors, (25), 25 states have call successors, (25) [2022-07-19 15:44:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 124 transitions. [2022-07-19 15:44:56,240 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 124 transitions. Word has length 38 [2022-07-19 15:44:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:44:56,241 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 124 transitions. [2022-07-19 15:44:56,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-19 15:44:56,241 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 124 transitions. [2022-07-19 15:44:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 15:44:56,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:44:56,243 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:44:56,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 15:44:56,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:44:56,469 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:44:56,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:44:56,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1925895455, now seen corresponding path program 1 times [2022-07-19 15:44:56,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:44:56,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770791807] [2022-07-19 15:44:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:56,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:44:56,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:44:56,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [58033709] [2022-07-19 15:44:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:56,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:44:56,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:44:56,481 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:44:56,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 15:44:56,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:44:56,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 15:44:56,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:44:56,596 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 15:44:56,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:44:56,700 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 15:44:56,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:44:56,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770791807] [2022-07-19 15:44:56,701 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:44:56,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58033709] [2022-07-19 15:44:56,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58033709] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:44:56,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:44:56,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-07-19 15:44:56,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334821127] [2022-07-19 15:44:56,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:44:56,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 15:44:56,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:44:56,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 15:44:56,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:44:56,704 INFO L87 Difference]: Start difference. First operand 99 states and 124 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 15:44:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:44:56,847 INFO L93 Difference]: Finished difference Result 114 states and 144 transitions. [2022-07-19 15:44:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 15:44:56,848 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2022-07-19 15:44:56,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:44:56,849 INFO L225 Difference]: With dead ends: 114 [2022-07-19 15:44:56,849 INFO L226 Difference]: Without dead ends: 102 [2022-07-19 15:44:56,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:44:56,850 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:44:56,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 98 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:44:56,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-19 15:44:56,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2022-07-19 15:44:56,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 66 states have internal predecessors, (70), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (27), 22 states have call predecessors, (27), 27 states have call successors, (27) [2022-07-19 15:44:56,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2022-07-19 15:44:56,863 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 40 [2022-07-19 15:44:56,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:44:56,863 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2022-07-19 15:44:56,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-19 15:44:56,864 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2022-07-19 15:44:56,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 15:44:56,864 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:44:56,865 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:44:56,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 15:44:57,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:44:57,079 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:44:57,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:44:57,079 INFO L85 PathProgramCache]: Analyzing trace with hash 968731240, now seen corresponding path program 2 times [2022-07-19 15:44:57,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:44:57,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165740191] [2022-07-19 15:44:57,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:57,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:44:57,088 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:44:57,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [725957034] [2022-07-19 15:44:57,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:44:57,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:44:57,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:44:57,090 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:44:57,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 15:44:57,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:44:57,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:44:57,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 15:44:57,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:44:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 15:44:57,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:44:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 15:44:57,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:44:57,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165740191] [2022-07-19 15:44:57,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-19 15:44:57,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725957034] [2022-07-19 15:44:57,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725957034] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:44:57,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 15:44:57,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-07-19 15:44:57,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2580704] [2022-07-19 15:44:57,377 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 15:44:57,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 15:44:57,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:44:57,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 15:44:57,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 15:44:57,378 INFO L87 Difference]: Start difference. First operand 100 states and 126 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-19 15:44:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:44:57,918 INFO L93 Difference]: Finished difference Result 127 states and 165 transitions. [2022-07-19 15:44:57,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 15:44:57,918 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 43 [2022-07-19 15:44:57,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:44:57,920 INFO L225 Difference]: With dead ends: 127 [2022-07-19 15:44:57,920 INFO L226 Difference]: Without dead ends: 120 [2022-07-19 15:44:57,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:44:57,921 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:44:57,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 127 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:44:57,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-19 15:44:57,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2022-07-19 15:44:57,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 71 states have internal predecessors, (75), 25 states have call successors, (25), 13 states have call predecessors, (25), 13 states have return successors, (22), 19 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-19 15:44:57,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 122 transitions. [2022-07-19 15:44:57,935 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 122 transitions. Word has length 43 [2022-07-19 15:44:57,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:44:57,936 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 122 transitions. [2022-07-19 15:44:57,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-07-19 15:44:57,936 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 122 transitions. [2022-07-19 15:44:57,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-19 15:44:57,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:44:57,937 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:44:57,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 15:44:58,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 15:44:58,159 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:44:58,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:44:58,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1803285070, now seen corresponding path program 2 times [2022-07-19 15:44:58,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:44:58,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799244908] [2022-07-19 15:44:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:44:58,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:44:58,168 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-19 15:44:58,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981778070] [2022-07-19 15:44:58,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:44:58,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:44:58,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:44:58,171 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:44:58,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 15:44:58,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:44:58,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2022-07-19 15:44:58,228 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-19 15:44:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-19 15:44:58,293 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-19 15:44:58,293 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-19 15:44:58,294 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 15:44:58,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 15:44:58,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:44:58,522 INFO L356 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:44:58,525 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-19 15:44:58,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 03:44:58 BoogieIcfgContainer [2022-07-19 15:44:58,563 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-19 15:44:58,567 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-19 15:44:58,568 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-19 15:44:58,568 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-19 15:44:58,569 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:44:52" (3/4) ... [2022-07-19 15:44:58,571 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-19 15:44:58,649 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-19 15:44:58,649 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-19 15:44:58,650 INFO L158 Benchmark]: Toolchain (without parser) took 6428.49ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 76.5MB in the beginning and 95.6MB in the end (delta: -19.1MB). Peak memory consumption was 5.0MB. Max. memory is 16.1GB. [2022-07-19 15:44:58,651 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 107.0MB. Free memory is still 61.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 15:44:58,651 INFO L158 Benchmark]: CACSL2BoogieTranslator took 270.97ms. Allocated memory is still 107.0MB. Free memory was 76.5MB in the beginning and 81.7MB in the end (delta: -5.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-19 15:44:58,652 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.34ms. Allocated memory is still 107.0MB. Free memory was 81.7MB in the beginning and 80.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 15:44:58,652 INFO L158 Benchmark]: Boogie Preprocessor took 18.04ms. Allocated memory is still 107.0MB. Free memory was 80.2MB in the beginning and 78.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-19 15:44:58,653 INFO L158 Benchmark]: RCFGBuilder took 250.47ms. Allocated memory is still 107.0MB. Free memory was 78.9MB in the beginning and 69.2MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-19 15:44:58,654 INFO L158 Benchmark]: TraceAbstraction took 5753.26ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 68.8MB in the beginning and 98.8MB in the end (delta: -30.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-19 15:44:58,654 INFO L158 Benchmark]: Witness Printer took 82.09ms. Allocated memory is still 130.0MB. Free memory was 98.8MB in the beginning and 95.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-07-19 15:44:58,656 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 107.0MB. Free memory is still 61.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 270.97ms. Allocated memory is still 107.0MB. Free memory was 76.5MB in the beginning and 81.7MB in the end (delta: -5.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.34ms. Allocated memory is still 107.0MB. Free memory was 81.7MB in the beginning and 80.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.04ms. Allocated memory is still 107.0MB. Free memory was 80.2MB in the beginning and 78.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 250.47ms. Allocated memory is still 107.0MB. Free memory was 78.9MB in the beginning and 69.2MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 5753.26ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 68.8MB in the beginning and 98.8MB in the end (delta: -30.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 82.09ms. Allocated memory is still 130.0MB. Free memory was 98.8MB in the beginning and 95.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * 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 - CounterExampleResult [Line: 13]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L18] int counter = 0; VAL [counter=0] [L20] long long a, b, p, q, r, s; [L21] int x, y; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L24] RET assume_abort_if_not(x >= 1) VAL [counter=0, x=4, y=1] [L25] CALL assume_abort_if_not(y >= 1) VAL [\old(cond)=1, counter=0] [L8] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1, counter=0] [L25] RET assume_abort_if_not(y >= 1) VAL [counter=0, x=4, y=1] [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 VAL [a=4, b=1, counter=0, p=1, q=0, r=0, s=1, x=4, y=1] [L34] EXPR counter++ VAL [a=4, b=1, counter=1, counter++=0, p=1, q=0, r=0, s=1, x=4, y=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=1] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L39] COND FALSE !(!(a != b)) VAL [a=4, b=1, counter=1, p=1, q=0, r=0, s=1, x=4, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=3, b=1, counter=1, p=1, q=0, r=-1, s=1, x=4, y=1] [L34] EXPR counter++ VAL [a=3, b=1, counter=2, counter++=1, p=1, q=0, r=-1, s=1, x=4, y=1] [L34] COND TRUE counter++<2 [L35] CALL __VERIFIER_assert(1 == p * s - r * q) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L35] RET __VERIFIER_assert(1 == p * s - r * q) VAL [a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L36] CALL __VERIFIER_assert(a == y * r + x * p) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L36] RET __VERIFIER_assert(a == y * r + x * p) VAL [a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L37] CALL __VERIFIER_assert(b == x * q + y * s) VAL [\old(cond)=1, counter=2] [L11] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L37] RET __VERIFIER_assert(b == x * q + y * s) VAL [a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L39] COND FALSE !(!(a != b)) VAL [a=3, b=1, counter=2, p=1, q=0, r=-1, s=1, x=4, y=1] [L42] COND TRUE a > b [L43] a = a - b [L44] p = p - q [L45] r = r - s VAL [a=2, b=1, counter=2, p=1, q=0, r=-2, s=1, x=4, y=1] [L34] EXPR counter++ VAL [a=2, b=1, counter=3, counter++=2, p=1, q=0, r=-2, s=1, x=4, y=1] [L34] COND FALSE !(counter++<2) [L53] CALL __VERIFIER_assert(a - b == 0) VAL [\old(cond)=0, counter=3] [L11] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=3] [L13] reach_error() VAL [\old(cond)=0, cond=0, counter=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.6s, OverallIterations: 11, TraceHistogramMax: 7, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 172 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 134 mSDsluCounter, 1115 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 758 mSDsCounter, 84 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 683 IncrementalHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 84 mSolverCounterUnsat, 357 mSDtfsCounter, 683 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 405 GetRequests, 345 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=104occurred in iteration=10, InterpolantAutomatonStates: 62, 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, 10 MinimizatonAttempts, 29 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 360 NumberOfCodeBlocks, 360 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 411 ConstructedInterpolants, 0 QuantifiedInterpolants, 1330 SizeOfPredicates, 17 NumberOfNonLiveVariables, 823 ConjunctsInSsa, 96 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 251/277 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 RESULT: Ultimate proved your program to be incorrect! [2022-07-19 15:44:58,686 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE