./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/egcd3-ll_valuebound100.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 c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 12:05:56,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 12:05:56,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 12:05:57,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 12:05:57,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 12:05:57,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 12:05:57,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 12:05:57,015 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 12:05:57,016 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 12:05:57,017 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 12:05:57,017 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 12:05:57,018 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 12:05:57,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 12:05:57,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 12:05:57,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 12:05:57,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 12:05:57,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 12:05:57,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 12:05:57,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 12:05:57,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 12:05:57,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 12:05:57,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 12:05:57,027 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 12:05:57,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 12:05:57,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 12:05:57,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 12:05:57,029 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 12:05:57,030 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 12:05:57,030 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 12:05:57,031 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 12:05:57,031 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 12:05:57,032 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 12:05:57,032 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 12:05:57,033 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 12:05:57,033 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 12:05:57,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 12:05:57,034 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 12:05:57,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 12:05:57,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 12:05:57,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 12:05:57,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 12:05:57,047 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 12:05:57,063 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 12:05:57,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 12:05:57,064 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 12:05:57,064 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 12:05:57,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 12:05:57,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 12:05:57,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 12:05:57,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 12:05:57,065 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 12:05:57,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 12:05:57,065 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 12:05:57,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 12:05:57,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 12:05:57,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 12:05:57,066 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 12:05:57,066 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 12:05:57,066 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 12:05:57,067 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 12:05:57,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 12:05:57,067 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 12:05:57,067 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 12:05:57,067 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 12:05:57,067 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 12:05:57,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 12:05:57,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 12:05:57,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 12:05:57,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 12:05:57,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 12:05:57,069 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 12:05:57,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 12:05:57,069 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 12:05:57,069 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 12:05:57,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 12:05:57,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 12:05:57,069 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3e4caaff40cd418d8c93f0410c37d1e421cc5f90c41578bfaa7bb16ff289f1e [2021-12-17 12:05:57,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 12:05:57,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 12:05:57,275 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 12:05:57,276 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 12:05:57,277 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 12:05:57,278 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2021-12-17 12:05:57,339 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/305c7fe1e/c9975c14d9dc4589b034bf37e3b37753/FLAG99ecd11fc [2021-12-17 12:05:57,688 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 12:05:57,688 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound100.c [2021-12-17 12:05:57,692 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/305c7fe1e/c9975c14d9dc4589b034bf37e3b37753/FLAG99ecd11fc [2021-12-17 12:05:57,702 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/305c7fe1e/c9975c14d9dc4589b034bf37e3b37753 [2021-12-17 12:05:57,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 12:05:57,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 12:05:57,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 12:05:57,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 12:05:57,707 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 12:05:57,708 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:05:57" (1/1) ... [2021-12-17 12:05:57,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73d1a0a9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:57, skipping insertion in model container [2021-12-17 12:05:57,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:05:57" (1/1) ... [2021-12-17 12:05:57,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 12:05:57,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 12:05:57,827 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/egcd3-ll_valuebound100.c[490,503] [2021-12-17 12:05:57,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 12:05:57,843 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 12:05:57,852 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/egcd3-ll_valuebound100.c[490,503] [2021-12-17 12:05:57,857 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 12:05:57,865 INFO L208 MainTranslator]: Completed translation [2021-12-17 12:05:57,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:57 WrapperNode [2021-12-17 12:05:57,865 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 12:05:57,866 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 12:05:57,866 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 12:05:57,866 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 12:05:57,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:57" (1/1) ... [2021-12-17 12:05:57,874 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:57" (1/1) ... [2021-12-17 12:05:57,885 INFO L137 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2021-12-17 12:05:57,885 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 12:05:57,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 12:05:57,885 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 12:05:57,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 12:05:57,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:57" (1/1) ... [2021-12-17 12:05:57,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:57" (1/1) ... [2021-12-17 12:05:57,891 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:57" (1/1) ... [2021-12-17 12:05:57,891 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:57" (1/1) ... [2021-12-17 12:05:57,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:57" (1/1) ... [2021-12-17 12:05:57,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:57" (1/1) ... [2021-12-17 12:05:57,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:57" (1/1) ... [2021-12-17 12:05:57,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 12:05:57,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 12:05:57,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 12:05:57,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 12:05:57,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:57" (1/1) ... [2021-12-17 12:05:57,915 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 12:05:57,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:57,932 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) [2021-12-17 12:05:57,948 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 [2021-12-17 12:05:57,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 12:05:57,957 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-12-17 12:05:57,957 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-12-17 12:05:57,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 12:05:57,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 12:05:57,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 12:05:57,958 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-17 12:05:57,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-17 12:05:57,997 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 12:05:58,000 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 12:05:58,084 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 12:05:58,088 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 12:05:58,088 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-17 12:05:58,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:05:58 BoogieIcfgContainer [2021-12-17 12:05:58,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 12:05:58,090 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 12:05:58,090 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 12:05:58,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 12:05:58,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:05:57" (1/3) ... [2021-12-17 12:05:58,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@776a596d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:05:58, skipping insertion in model container [2021-12-17 12:05:58,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:05:57" (2/3) ... [2021-12-17 12:05:58,093 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@776a596d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:05:58, skipping insertion in model container [2021-12-17 12:05:58,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:05:58" (3/3) ... [2021-12-17 12:05:58,094 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound100.c [2021-12-17 12:05:58,097 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 12:05:58,097 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 12:05:58,124 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 12:05:58,128 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 12:05:58,128 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 12:05:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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) [2021-12-17 12:05:58,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-17 12:05:58,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:58,160 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:58,161 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:58,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:58,164 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2021-12-17 12:05:58,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:58,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550942927] [2021-12-17 12:05:58,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:58,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:58,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 12:05:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:58,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-12-17 12:05:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:58,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-12-17 12:05:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:58,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-17 12:05:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 12:05:58,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:58,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550942927] [2021-12-17 12:05:58,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550942927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:05:58,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:05:58,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 12:05:58,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909235606] [2021-12-17 12:05:58,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:05:58,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 12:05:58,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:58,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 12:05:58,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 12:05:58,341 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 12:05:58,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:58,357 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2021-12-17 12:05:58,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 12:05:58,358 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-12-17 12:05:58,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:58,370 INFO L225 Difference]: With dead ends: 67 [2021-12-17 12:05:58,370 INFO L226 Difference]: Without dead ends: 31 [2021-12-17 12:05:58,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 12:05:58,382 INFO L933 BasicCegarLoop]: 44 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, 44 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 [2021-12-17 12:05:58,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:05:58,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-17 12:05:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-12-17 12:05:58,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 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) [2021-12-17 12:05:58,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2021-12-17 12:05:58,423 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2021-12-17 12:05:58,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:58,424 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2021-12-17 12:05:58,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 12:05:58,424 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2021-12-17 12:05:58,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-17 12:05:58,427 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:58,428 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:58,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 12:05:58,429 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:58,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:58,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2021-12-17 12:05:58,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:58,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650681138] [2021-12-17 12:05:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:58,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:58,456 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:58,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [667065134] [2021-12-17 12:05:58,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:58,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:58,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:58,458 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) [2021-12-17 12:05:58,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 12:05:58,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:58,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 12:05:58,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 12:05:58,661 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 12:05:58,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:58,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650681138] [2021-12-17 12:05:58,662 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:58,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667065134] [2021-12-17 12:05:58,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667065134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:05:58,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:05:58,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-17 12:05:58,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661643540] [2021-12-17 12:05:58,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:05:58,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-17 12:05:58,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:58,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-17 12:05:58,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-17 12:05:58,670 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 12:05:58,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:58,759 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2021-12-17 12:05:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 12:05:58,759 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2021-12-17 12:05:58,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:58,761 INFO L225 Difference]: With dead ends: 50 [2021-12-17 12:05:58,761 INFO L226 Difference]: Without dead ends: 43 [2021-12-17 12:05:58,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 12:05:58,762 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:58,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 135 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 12:05:58,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-12-17 12:05:58,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2021-12-17 12:05:58,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 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) [2021-12-17 12:05:58,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2021-12-17 12:05:58,773 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2021-12-17 12:05:58,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:58,774 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2021-12-17 12:05:58,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 12:05:58,774 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2021-12-17 12:05:58,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 12:05:58,775 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:58,775 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:58,812 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 12:05:58,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:58,992 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:58,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:58,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2021-12-17 12:05:58,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:58,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634024131] [2021-12-17 12:05:58,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:58,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:59,023 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:59,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798130880] [2021-12-17 12:05:59,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:59,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:59,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:59,048 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) [2021-12-17 12:05:59,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 12:05:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:59,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 12:05:59,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 12:05:59,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 12:05:59,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:59,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634024131] [2021-12-17 12:05:59,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:59,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798130880] [2021-12-17 12:05:59,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798130880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:05:59,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:05:59,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 12:05:59,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435564754] [2021-12-17 12:05:59,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:05:59,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:05:59,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:59,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:05:59,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:05:59,173 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 12:05:59,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:59,196 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2021-12-17 12:05:59,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 12:05:59,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2021-12-17 12:05:59,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:59,197 INFO L225 Difference]: With dead ends: 49 [2021-12-17 12:05:59,197 INFO L226 Difference]: Without dead ends: 47 [2021-12-17 12:05:59,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 12:05:59,198 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:59,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 146 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:05:59,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-17 12:05:59,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-12-17 12:05:59,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-17 12:05:59,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-12-17 12:05:59,204 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2021-12-17 12:05:59,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:59,204 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-12-17 12:05:59,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 12:05:59,205 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-12-17 12:05:59,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 12:05:59,205 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:59,205 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:59,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 12:05:59,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-17 12:05:59,422 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:59,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:59,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2021-12-17 12:05:59,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:59,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877204758] [2021-12-17 12:05:59,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:59,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:59,432 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:59,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222234432] [2021-12-17 12:05:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:59,432 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:59,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:05:59,439 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) [2021-12-17 12:05:59,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 12:05:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:05:59,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 12:05:59,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:05:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 12:05:59,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:05:59,623 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 12:05:59,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:05:59,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877204758] [2021-12-17 12:05:59,623 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:05:59,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222234432] [2021-12-17 12:05:59,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222234432] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:05:59,624 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:05:59,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-17 12:05:59,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205018070] [2021-12-17 12:05:59,624 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:05:59,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 12:05:59,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:05:59,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 12:05:59,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-17 12:05:59,625 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 12:05:59,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:05:59,731 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2021-12-17 12:05:59,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 12:05:59,731 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-12-17 12:05:59,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:05:59,732 INFO L225 Difference]: With dead ends: 99 [2021-12-17 12:05:59,732 INFO L226 Difference]: Without dead ends: 92 [2021-12-17 12:05:59,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-12-17 12:05:59,734 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 60 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 12:05:59,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 224 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 12:05:59,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-12-17 12:05:59,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2021-12-17 12:05:59,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-17 12:05:59,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2021-12-17 12:05:59,764 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2021-12-17 12:05:59,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:05:59,764 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2021-12-17 12:05:59,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-17 12:05:59,765 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2021-12-17 12:05:59,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 12:05:59,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:05:59,765 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:05:59,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 12:05:59,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:59,982 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:05:59,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:05:59,982 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2021-12-17 12:05:59,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:05:59,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594972230] [2021-12-17 12:05:59,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:59,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:05:59,992 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:05:59,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164395581] [2021-12-17 12:05:59,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:05:59,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:05:59,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:06:00,009 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) [2021-12-17 12:06:00,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 12:06:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:06:00,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-17 12:06:00,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:06:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 12:06:00,132 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 12:06:00,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:06:00,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594972230] [2021-12-17 12:06:00,133 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:06:00,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164395581] [2021-12-17 12:06:00,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164395581] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:06:00,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:06:00,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 12:06:00,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280076171] [2021-12-17 12:06:00,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:06:00,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:06:00,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:06:00,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:06:00,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:06:00,135 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-12-17 12:06:00,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:06:00,162 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2021-12-17 12:06:00,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 12:06:00,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 [2021-12-17 12:06:00,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:06:00,163 INFO L225 Difference]: With dead ends: 75 [2021-12-17 12:06:00,163 INFO L226 Difference]: Without dead ends: 73 [2021-12-17 12:06:00,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 12:06:00,164 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:06:00,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 142 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:06:00,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-17 12:06:00,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-12-17 12:06:00,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-12-17 12:06:00,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2021-12-17 12:06:00,171 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2021-12-17 12:06:00,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:06:00,172 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2021-12-17 12:06:00,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-12-17 12:06:00,172 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2021-12-17 12:06:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-17 12:06:00,173 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:06:00,173 INFO L514 BasicCegarLoop]: trace histogram [4, 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] [2021-12-17 12:06:00,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 12:06:00,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:06:00,389 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:06:00,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:06:00,390 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2021-12-17 12:06:00,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:06:00,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175632433] [2021-12-17 12:06:00,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:00,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:06:00,400 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:06:00,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312538012] [2021-12-17 12:06:00,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:00,401 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:06:00,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:06:00,402 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) [2021-12-17 12:06:00,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 12:06:00,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:06:00,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-17 12:06:00,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:06:00,596 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-17 12:06:00,596 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:06:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 12:06:00,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:06:00,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175632433] [2021-12-17 12:06:00,685 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:06:00,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312538012] [2021-12-17 12:06:00,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312538012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:06:00,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:06:00,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2021-12-17 12:06:00,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224297549] [2021-12-17 12:06:00,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:06:00,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 12:06:00,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:06:00,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 12:06:00,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-17 12:06:00,687 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 12:06:00,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:06:00,900 INFO L93 Difference]: Finished difference Result 114 states and 155 transitions. [2021-12-17 12:06:00,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-17 12:06:00,901 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2021-12-17 12:06:00,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:06:00,902 INFO L225 Difference]: With dead ends: 114 [2021-12-17 12:06:00,902 INFO L226 Difference]: Without dead ends: 112 [2021-12-17 12:06:00,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-12-17 12:06:00,902 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 68 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 12:06:00,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 301 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 12:06:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-12-17 12:06:00,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 101. [2021-12-17 12:06:00,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2021-12-17 12:06:00,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2021-12-17 12:06:00,912 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2021-12-17 12:06:00,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:06:00,913 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2021-12-17 12:06:00,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 10 states have internal predecessors, (34), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 12:06:00,913 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2021-12-17 12:06:00,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 12:06:00,914 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:06:00,914 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:06:00,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 12:06:01,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:06:01,132 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:06:01,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:06:01,133 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2021-12-17 12:06:01,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:06:01,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265928650] [2021-12-17 12:06:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:01,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:06:01,141 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:06:01,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467306734] [2021-12-17 12:06:01,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:01,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:06:01,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:06:01,147 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) [2021-12-17 12:06:01,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 12:06:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:06:01,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 12:06:01,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:06:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-17 12:06:01,246 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 12:06:01,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:06:01,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265928650] [2021-12-17 12:06:01,247 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:06:01,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467306734] [2021-12-17 12:06:01,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467306734] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:06:01,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:06:01,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 12:06:01,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828912236] [2021-12-17 12:06:01,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:06:01,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:06:01,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:06:01,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:06:01,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:06:01,249 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 12:06:01,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:06:01,282 INFO L93 Difference]: Finished difference Result 147 states and 209 transitions. [2021-12-17 12:06:01,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 12:06:01,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2021-12-17 12:06:01,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:06:01,283 INFO L225 Difference]: With dead ends: 147 [2021-12-17 12:06:01,283 INFO L226 Difference]: Without dead ends: 145 [2021-12-17 12:06:01,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 12:06:01,284 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:06:01,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 135 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:06:01,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-17 12:06:01,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2021-12-17 12:06:01,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2021-12-17 12:06:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 201 transitions. [2021-12-17 12:06:01,301 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 201 transitions. Word has length 43 [2021-12-17 12:06:01,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:06:01,302 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 201 transitions. [2021-12-17 12:06:01,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-17 12:06:01,302 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 201 transitions. [2021-12-17 12:06:01,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 12:06:01,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:06:01,303 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:06:01,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-17 12:06:01,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:06:01,523 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:06:01,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:06:01,523 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2021-12-17 12:06:01,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:06:01,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961209060] [2021-12-17 12:06:01,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:01,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:06:01,531 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:06:01,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2432709] [2021-12-17 12:06:01,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:01,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:06:01,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:06:01,533 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) [2021-12-17 12:06:01,534 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-17 12:06:01,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:06:01,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-17 12:06:01,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:06:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 12:06:01,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:06:01,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:06:01,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961209060] [2021-12-17 12:06:01,771 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:06:01,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2432709] [2021-12-17 12:06:01,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2432709] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 12:06:01,771 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:06:01,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-12-17 12:06:01,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869622247] [2021-12-17 12:06:01,771 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-17 12:06:01,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-17 12:06:01,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:06:01,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-17 12:06:01,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-17 12:06:01,772 INFO L87 Difference]: Start difference. First operand 139 states and 201 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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) [2021-12-17 12:06:01,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:06:01,873 INFO L93 Difference]: Finished difference Result 152 states and 212 transitions. [2021-12-17 12:06:01,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 12:06:01,873 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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 43 [2021-12-17 12:06:01,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:06:01,875 INFO L225 Difference]: With dead ends: 152 [2021-12-17 12:06:01,875 INFO L226 Difference]: Without dead ends: 150 [2021-12-17 12:06:01,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-17 12:06:01,876 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 27 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 12:06:01,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 242 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 12:06:01,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-17 12:06:01,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2021-12-17 12:06:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 93 states have (on average 1.2688172043010753) internal successors, (118), 94 states have internal predecessors, (118), 45 states have call successors, (45), 8 states have call predecessors, (45), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2021-12-17 12:06:01,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 207 transitions. [2021-12-17 12:06:01,887 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 207 transitions. Word has length 43 [2021-12-17 12:06:01,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:06:01,887 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 207 transitions. [2021-12-17 12:06:01,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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) [2021-12-17 12:06:01,887 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 207 transitions. [2021-12-17 12:06:01,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-17 12:06:01,888 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:06:01,888 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:06:01,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-17 12:06:02,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:06:02,122 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:06:02,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:06:02,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2021-12-17 12:06:02,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:06:02,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735110975] [2021-12-17 12:06:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:02,124 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:06:02,131 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:06:02,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [671770542] [2021-12-17 12:06:02,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 12:06:02,131 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:06:02,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:06:02,132 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) [2021-12-17 12:06:02,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-17 12:06:02,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 12:06:02,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:06:02,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-17 12:06:02,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:06:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-12-17 12:06:02,226 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 12:06:02,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:06:02,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735110975] [2021-12-17 12:06:02,226 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:06:02,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671770542] [2021-12-17 12:06:02,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671770542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:06:02,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:06:02,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 12:06:02,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729743977] [2021-12-17 12:06:02,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:06:02,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:06:02,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:06:02,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:06:02,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:06:02,228 INFO L87 Difference]: Start difference. First operand 147 states and 207 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 12:06:02,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:06:02,280 INFO L93 Difference]: Finished difference Result 186 states and 259 transitions. [2021-12-17 12:06:02,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 12:06:02,281 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2021-12-17 12:06:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:06:02,282 INFO L225 Difference]: With dead ends: 186 [2021-12-17 12:06:02,282 INFO L226 Difference]: Without dead ends: 130 [2021-12-17 12:06:02,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-17 12:06:02,283 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:06:02,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 164 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:06:02,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-12-17 12:06:02,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2021-12-17 12:06:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 76 states have (on average 1.2105263157894737) internal successors, (92), 77 states have internal predecessors, (92), 37 states have call successors, (37), 8 states have call predecessors, (37), 8 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2021-12-17 12:06:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 165 transitions. [2021-12-17 12:06:02,291 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 165 transitions. Word has length 43 [2021-12-17 12:06:02,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:06:02,291 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 165 transitions. [2021-12-17 12:06:02,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-17 12:06:02,291 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 165 transitions. [2021-12-17 12:06:02,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-12-17 12:06:02,292 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:06:02,292 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:06:02,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-17 12:06:02,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-17 12:06:02,526 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:06:02,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:06:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2021-12-17 12:06:02,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:06:02,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916864494] [2021-12-17 12:06:02,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:02,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:06:02,541 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:06:02,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992803073] [2021-12-17 12:06:02,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:02,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:06:02,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:06:02,543 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) [2021-12-17 12:06:02,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-17 12:06:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:06:02,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 12:06:02,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:06:02,672 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 12:06:02,673 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 12:06:02,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:06:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916864494] [2021-12-17 12:06:02,673 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:06:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992803073] [2021-12-17 12:06:02,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992803073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:06:02,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:06:02,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 12:06:02,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192469691] [2021-12-17 12:06:02,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:06:02,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:06:02,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:06:02,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:06:02,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:06:02,674 INFO L87 Difference]: Start difference. First operand 122 states and 165 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 12:06:02,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:06:02,708 INFO L93 Difference]: Finished difference Result 190 states and 276 transitions. [2021-12-17 12:06:02,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 12:06:02,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2021-12-17 12:06:02,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:06:02,711 INFO L225 Difference]: With dead ends: 190 [2021-12-17 12:06:02,711 INFO L226 Difference]: Without dead ends: 188 [2021-12-17 12:06:02,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 12:06:02,712 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:06:02,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:06:02,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-12-17 12:06:02,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 166. [2021-12-17 12:06:02,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 69 states have call successors, (69), 9 states have call predecessors, (69), 9 states have return successors, (68), 60 states have call predecessors, (68), 68 states have call successors, (68) [2021-12-17 12:06:02,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 240 transitions. [2021-12-17 12:06:02,748 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 240 transitions. Word has length 48 [2021-12-17 12:06:02,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:06:02,748 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 240 transitions. [2021-12-17 12:06:02,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-12-17 12:06:02,748 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 240 transitions. [2021-12-17 12:06:02,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-17 12:06:02,749 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:06:02,750 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:06:02,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-17 12:06:02,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-17 12:06:02,966 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:06:02,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:06:02,966 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2021-12-17 12:06:02,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:06:02,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662397806] [2021-12-17 12:06:02,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:02,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:06:02,977 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:06:02,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [397562809] [2021-12-17 12:06:02,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:02,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:06:02,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:06:02,981 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:06:02,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-17 12:06:03,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:06:03,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-17 12:06:03,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:06:03,461 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 12:06:03,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:06:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-17 12:06:04,020 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:06:04,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662397806] [2021-12-17 12:06:04,020 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:06:04,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397562809] [2021-12-17 12:06:04,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397562809] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:06:04,020 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:06:04,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-12-17 12:06:04,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095426876] [2021-12-17 12:06:04,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:06:04,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-17 12:06:04,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:06:04,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-17 12:06:04,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-17 12:06:04,021 INFO L87 Difference]: Start difference. First operand 166 states and 240 transitions. Second operand has 21 states, 18 states have (on average 2.388888888888889) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-17 12:06:10,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:06:10,721 INFO L93 Difference]: Finished difference Result 304 states and 454 transitions. [2021-12-17 12:06:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-17 12:06:10,722 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.388888888888889) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) Word has length 60 [2021-12-17 12:06:10,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:06:10,724 INFO L225 Difference]: With dead ends: 304 [2021-12-17 12:06:10,724 INFO L226 Difference]: Without dead ends: 300 [2021-12-17 12:06:10,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2021-12-17 12:06:10,725 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 102 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-17 12:06:10,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 562 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-17 12:06:10,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-17 12:06:10,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 248. [2021-12-17 12:06:10,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 142 states have (on average 1.2183098591549295) internal successors, (173), 149 states have internal predecessors, (173), 93 states have call successors, (93), 12 states have call predecessors, (93), 12 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-17 12:06:10,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 358 transitions. [2021-12-17 12:06:10,780 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 358 transitions. Word has length 60 [2021-12-17 12:06:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:06:10,781 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 358 transitions. [2021-12-17 12:06:10,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.388888888888889) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 6 states have call successors, (12) [2021-12-17 12:06:10,781 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 358 transitions. [2021-12-17 12:06:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-17 12:06:10,782 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:06:10,782 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:06:10,809 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-12-17 12:06:11,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-17 12:06:11,007 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:06:11,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:06:11,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1607561902, now seen corresponding path program 1 times [2021-12-17 12:06:11,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:06:11,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73191059] [2021-12-17 12:06:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:11,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:06:11,014 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:06:11,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [5844868] [2021-12-17 12:06:11,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:11,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:06:11,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:06:11,023 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:06:11,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-17 12:06:11,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:06:11,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-17 12:06:11,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:06:11,271 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 23 proven. 5 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-12-17 12:06:11,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:06:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-17 12:06:11,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:06:11,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73191059] [2021-12-17 12:06:11,407 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:06:11,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5844868] [2021-12-17 12:06:11,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5844868] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-17 12:06:11,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 12:06:11,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2021-12-17 12:06:11,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629217270] [2021-12-17 12:06:11,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:06:11,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:06:11,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:06:11,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:06:11,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-12-17 12:06:11,409 INFO L87 Difference]: Start difference. First operand 248 states and 358 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 12:06:11,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:06:11,456 INFO L93 Difference]: Finished difference Result 254 states and 363 transitions. [2021-12-17 12:06:11,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 12:06:11,456 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 70 [2021-12-17 12:06:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:06:11,459 INFO L225 Difference]: With dead ends: 254 [2021-12-17 12:06:11,459 INFO L226 Difference]: Without dead ends: 252 [2021-12-17 12:06:11,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-12-17 12:06:11,460 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:06:11,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 129 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:06:11,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-12-17 12:06:11,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2021-12-17 12:06:11,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 145 states have (on average 1.2137931034482758) internal successors, (176), 152 states have internal predecessors, (176), 93 states have call successors, (93), 13 states have call predecessors, (93), 13 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-17 12:06:11,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 361 transitions. [2021-12-17 12:06:11,494 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 361 transitions. Word has length 70 [2021-12-17 12:06:11,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:06:11,494 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 361 transitions. [2021-12-17 12:06:11,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 12:06:11,494 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 361 transitions. [2021-12-17 12:06:11,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-17 12:06:11,495 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:06:11,495 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:06:11,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-17 12:06:11,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-17 12:06:11,712 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:06:11,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:06:11,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2021-12-17 12:06:11,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:06:11,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349760580] [2021-12-17 12:06:11,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:11,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:06:11,728 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:06:11,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446677192] [2021-12-17 12:06:11,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:11,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:06:11,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:06:11,729 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:06:11,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-17 12:06:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:06:11,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-17 12:06:11,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:06:11,925 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 12:06:11,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:06:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 12:06:12,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:06:12,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349760580] [2021-12-17 12:06:12,107 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:06:12,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446677192] [2021-12-17 12:06:12,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446677192] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:06:12,107 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:06:12,107 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-12-17 12:06:12,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319472344] [2021-12-17 12:06:12,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:06:12,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 12:06:12,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:06:12,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 12:06:12,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-17 12:06:12,108 INFO L87 Difference]: Start difference. First operand 252 states and 361 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 12:06:12,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:06:12,309 INFO L93 Difference]: Finished difference Result 266 states and 372 transitions. [2021-12-17 12:06:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-17 12:06:12,309 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 68 [2021-12-17 12:06:12,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:06:12,310 INFO L225 Difference]: With dead ends: 266 [2021-12-17 12:06:12,310 INFO L226 Difference]: Without dead ends: 264 [2021-12-17 12:06:12,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-17 12:06:12,311 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 27 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 12:06:12,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 124 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-17 12:06:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-12-17 12:06:12,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2021-12-17 12:06:12,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 154 states have (on average 1.2012987012987013) internal successors, (185), 161 states have internal predecessors, (185), 93 states have call successors, (93), 16 states have call predecessors, (93), 16 states have return successors, (92), 86 states have call predecessors, (92), 92 states have call successors, (92) [2021-12-17 12:06:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 370 transitions. [2021-12-17 12:06:12,347 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 370 transitions. Word has length 68 [2021-12-17 12:06:12,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:06:12,347 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 370 transitions. [2021-12-17 12:06:12,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-17 12:06:12,347 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 370 transitions. [2021-12-17 12:06:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-17 12:06:12,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:06:12,348 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:06:12,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-17 12:06:12,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-17 12:06:12,563 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:06:12,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:06:12,564 INFO L85 PathProgramCache]: Analyzing trace with hash 798002477, now seen corresponding path program 2 times [2021-12-17 12:06:12,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:06:12,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897338586] [2021-12-17 12:06:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:12,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:06:12,569 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:06:12,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851909129] [2021-12-17 12:06:12,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 12:06:12,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:06:12,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:06:12,573 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:06:12,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-17 12:06:12,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 12:06:12,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:06:12,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 12:06:12,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:06:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-17 12:06:12,707 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 12:06:12,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:06:12,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897338586] [2021-12-17 12:06:12,707 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:06:12,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851909129] [2021-12-17 12:06:12,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851909129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 12:06:12,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 12:06:12,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 12:06:12,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940945240] [2021-12-17 12:06:12,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 12:06:12,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 12:06:12,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:06:12,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 12:06:12,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 12:06:12,710 INFO L87 Difference]: Start difference. First operand 264 states and 370 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 12:06:12,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:06:12,758 INFO L93 Difference]: Finished difference Result 456 states and 635 transitions. [2021-12-17 12:06:12,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 12:06:12,759 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 73 [2021-12-17 12:06:12,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:06:12,760 INFO L225 Difference]: With dead ends: 456 [2021-12-17 12:06:12,760 INFO L226 Difference]: Without dead ends: 275 [2021-12-17 12:06:12,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 12:06:12,763 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 12:06:12,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 103 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 12:06:12,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-12-17 12:06:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 255. [2021-12-17 12:06:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 153 states have (on average 1.196078431372549) internal successors, (183), 154 states have internal predecessors, (183), 85 states have call successors, (85), 16 states have call predecessors, (85), 16 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2021-12-17 12:06:12,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 352 transitions. [2021-12-17 12:06:12,800 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 352 transitions. Word has length 73 [2021-12-17 12:06:12,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:06:12,801 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 352 transitions. [2021-12-17 12:06:12,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-12-17 12:06:12,801 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 352 transitions. [2021-12-17 12:06:12,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-17 12:06:12,802 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:06:12,802 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:06:12,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-17 12:06:13,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-17 12:06:13,019 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:06:13,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:06:13,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 3 times [2021-12-17 12:06:13,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:06:13,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343918605] [2021-12-17 12:06:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:13,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:06:13,027 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:06:13,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941566351] [2021-12-17 12:06:13,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 12:06:13,028 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:06:13,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:06:13,029 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:06:13,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-17 12:06:13,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-17 12:06:13,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 12:06:13,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-17 12:06:13,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:06:14,180 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 32 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-17 12:06:14,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:06:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 25 proven. 19 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-12-17 12:06:15,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:06:15,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343918605] [2021-12-17 12:06:15,995 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:06:15,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941566351] [2021-12-17 12:06:15,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941566351] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:06:15,996 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:06:15,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2021-12-17 12:06:15,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652943187] [2021-12-17 12:06:15,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:06:15,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-17 12:06:15,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:06:15,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-17 12:06:15,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-12-17 12:06:15,997 INFO L87 Difference]: Start difference. First operand 255 states and 352 transitions. Second operand has 30 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-12-17 12:06:25,903 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:06:27,917 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:06:29,921 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:06:32,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:06:32,715 INFO L93 Difference]: Finished difference Result 344 states and 458 transitions. [2021-12-17 12:06:32,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-17 12:06:32,716 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 73 [2021-12-17 12:06:32,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:06:32,717 INFO L225 Difference]: With dead ends: 344 [2021-12-17 12:06:32,717 INFO L226 Difference]: Without dead ends: 342 [2021-12-17 12:06:32,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=632, Invalid=2790, Unknown=0, NotChecked=0, Total=3422 [2021-12-17 12:06:32,719 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 254 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 420 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-12-17 12:06:32,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 651 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 1298 Invalid, 3 Unknown, 0 Unchecked, 10.2s Time] [2021-12-17 12:06:32,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-12-17 12:06:32,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 329. [2021-12-17 12:06:32,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 202 states have (on average 1.1782178217821782) internal successors, (238), 204 states have internal predecessors, (238), 103 states have call successors, (103), 23 states have call predecessors, (103), 23 states have return successors, (102), 101 states have call predecessors, (102), 102 states have call successors, (102) [2021-12-17 12:06:32,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 443 transitions. [2021-12-17 12:06:32,763 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 443 transitions. Word has length 73 [2021-12-17 12:06:32,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:06:32,763 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 443 transitions. [2021-12-17 12:06:32,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2021-12-17 12:06:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 443 transitions. [2021-12-17 12:06:32,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-17 12:06:32,764 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:06:32,764 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:06:32,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-17 12:06:32,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:06:32,980 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:06:32,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:06:32,980 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2021-12-17 12:06:32,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:06:32,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732575798] [2021-12-17 12:06:32,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:32,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:06:32,986 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:06:32,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330107663] [2021-12-17 12:06:32,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:06:32,986 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:06:32,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:06:32,991 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:06:32,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-17 12:06:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:06:33,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-17 12:06:33,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:06:33,832 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-17 12:06:33,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 12:06:36,830 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-12-17 12:06:36,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 12:06:36,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732575798] [2021-12-17 12:06:36,830 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 12:06:36,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330107663] [2021-12-17 12:06:36,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330107663] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 12:06:36,831 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 12:06:36,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2021-12-17 12:06:36,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444298089] [2021-12-17 12:06:36,831 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 12:06:36,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 12:06:36,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 12:06:36,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 12:06:36,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-12-17 12:06:36,832 INFO L87 Difference]: Start difference. First operand 329 states and 443 transitions. Second operand has 26 states, 24 states have (on average 2.375) internal successors, (57), 25 states have internal predecessors, (57), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-17 12:06:44,602 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:06:51,506 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:06:53,510 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:06:55,515 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:06:57,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:07:01,398 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:07:05,211 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:07:09,906 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:07:11,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:07:20,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2021-12-17 12:07:21,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 12:07:21,616 INFO L93 Difference]: Finished difference Result 592 states and 839 transitions. [2021-12-17 12:07:21,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-12-17 12:07:21,617 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.375) internal successors, (57), 25 states have internal predecessors, (57), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 87 [2021-12-17 12:07:21,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 12:07:21,619 INFO L225 Difference]: With dead ends: 592 [2021-12-17 12:07:21,619 INFO L226 Difference]: Without dead ends: 584 [2021-12-17 12:07:21,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=963, Invalid=4293, Unknown=0, NotChecked=0, Total=5256 [2021-12-17 12:07:21,621 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 240 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 2054 mSolverCounterSat, 629 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 2692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 2054 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 33.5s IncrementalHoareTripleChecker+Time [2021-12-17 12:07:21,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 864 Invalid, 2692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 2054 Invalid, 9 Unknown, 0 Unchecked, 33.5s Time] [2021-12-17 12:07:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-12-17 12:07:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 491. [2021-12-17 12:07:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 304 states have (on average 1.194078947368421) internal successors, (363), 307 states have internal predecessors, (363), 157 states have call successors, (157), 29 states have call predecessors, (157), 29 states have return successors, (156), 154 states have call predecessors, (156), 156 states have call successors, (156) [2021-12-17 12:07:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 676 transitions. [2021-12-17 12:07:21,714 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 676 transitions. Word has length 87 [2021-12-17 12:07:21,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 12:07:21,714 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 676 transitions. [2021-12-17 12:07:21,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.375) internal successors, (57), 25 states have internal predecessors, (57), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2021-12-17 12:07:21,714 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 676 transitions. [2021-12-17 12:07:21,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-17 12:07:21,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 12:07:21,715 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 12:07:21,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-12-17 12:07:21,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 12:07:21,924 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 12:07:21,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 12:07:21,924 INFO L85 PathProgramCache]: Analyzing trace with hash -275231594, now seen corresponding path program 1 times [2021-12-17 12:07:21,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 12:07:21,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689164911] [2021-12-17 12:07:21,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:07:21,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 12:07:21,929 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 12:07:21,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589417947] [2021-12-17 12:07:21,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 12:07:21,930 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 12:07:21,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 12:07:21,932 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 12:07:21,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-12-17 12:07:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 12:07:21,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2021-12-17 12:07:21,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 12:07:22,492 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 46 proven. 17 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2021-12-17 12:07:22,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... Killed by 15