./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/egcd2-ll_valuebound10.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 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:42:21,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:42:21,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:42:21,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:42:21,046 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:42:21,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:42:21,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:42:21,054 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:42:21,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:42:21,060 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:42:21,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:42:21,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:42:21,064 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:42:21,066 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:42:21,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:42:21,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:42:21,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:42:21,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:42:21,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:42:21,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:42:21,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:42:21,078 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:42:21,079 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:42:21,080 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:42:21,087 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:42:21,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:42:21,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:42:21,089 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:42:21,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:42:21,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:42:21,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:42:21,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:42:21,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:42:21,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:42:21,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:42:21,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:42:21,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:42:21,096 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:42:21,096 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:42:21,097 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:42:21,098 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:42:21,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 11:42:21,126 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:42:21,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:42:21,127 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:42:21,127 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:42:21,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:42:21,128 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:42:21,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:42:21,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:42:21,129 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:42:21,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:42:21,130 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:42:21,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 11:42:21,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:42:21,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:42:21,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:42:21,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:42:21,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:42:21,131 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:42:21,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:42:21,132 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:42:21,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:42:21,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:42:21,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:42:21,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:42:21,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:42:21,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:42:21,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:42:21,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:42:21,134 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 11:42:21,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 11:42:21,134 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:42:21,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:42:21,134 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:42:21,134 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:42:21,135 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:42:21,135 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 [2023-02-15 11:42:21,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:42:21,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:42:21,404 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:42:21,405 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:42:21,405 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:42:21,406 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2023-02-15 11:42:22,454 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:42:22,600 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:42:22,601 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2023-02-15 11:42:22,605 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b88dde67/25b33bf8e6254f4699c7070fd1e88122/FLAG79b90f8ff [2023-02-15 11:42:22,615 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b88dde67/25b33bf8e6254f4699c7070fd1e88122 [2023-02-15 11:42:22,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:42:22,618 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:42:22,619 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:42:22,619 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:42:22,622 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:42:22,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:42:22" (1/1) ... [2023-02-15 11:42:22,624 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76185763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:22, skipping insertion in model container [2023-02-15 11:42:22,624 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:42:22" (1/1) ... [2023-02-15 11:42:22,630 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:42:22,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:42:22,765 WARN L237 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/egcd2-ll_valuebound10.c[490,503] [2023-02-15 11:42:22,808 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:42:22,816 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:42:22,825 WARN L237 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/egcd2-ll_valuebound10.c[490,503] [2023-02-15 11:42:22,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:42:22,842 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:42:22,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:22 WrapperNode [2023-02-15 11:42:22,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:42:22,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:42:22,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:42:22,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:42:22,848 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:22" (1/1) ... [2023-02-15 11:42:22,853 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:22" (1/1) ... [2023-02-15 11:42:22,867 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2023-02-15 11:42:22,868 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:42:22,869 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:42:22,869 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:42:22,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:42:22,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:22" (1/1) ... [2023-02-15 11:42:22,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:22" (1/1) ... [2023-02-15 11:42:22,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:22" (1/1) ... [2023-02-15 11:42:22,879 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:22" (1/1) ... [2023-02-15 11:42:22,882 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:22" (1/1) ... [2023-02-15 11:42:22,886 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:22" (1/1) ... [2023-02-15 11:42:22,887 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:22" (1/1) ... [2023-02-15 11:42:22,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:22" (1/1) ... [2023-02-15 11:42:22,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:42:22,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:42:22,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:42:22,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:42:22,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:22" (1/1) ... [2023-02-15 11:42:22,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:42:22,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:22,916 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) [2023-02-15 11:42:22,930 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 [2023-02-15 11:42:22,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:42:22,959 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 11:42:22,959 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 11:42:22,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 11:42:22,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:42:22,963 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:42:22,964 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 11:42:22,964 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 11:42:23,011 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:42:23,013 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:42:23,147 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:42:23,153 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:42:23,153 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 11:42:23,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:42:23 BoogieIcfgContainer [2023-02-15 11:42:23,155 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:42:23,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:42:23,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:42:23,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:42:23,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:42:22" (1/3) ... [2023-02-15 11:42:23,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12450cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:42:23, skipping insertion in model container [2023-02-15 11:42:23,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:42:22" (2/3) ... [2023-02-15 11:42:23,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12450cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:42:23, skipping insertion in model container [2023-02-15 11:42:23,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:42:23" (3/3) ... [2023-02-15 11:42:23,167 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2023-02-15 11:42:23,195 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:42:23,198 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:42:23,252 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:42:23,261 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@3498cb64, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:42:23,261 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:42:23,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-15 11:42:23,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 11:42:23,271 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:23,271 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:42:23,272 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:23,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:23,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2023-02-15 11:42:23,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:23,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503213733] [2023-02-15 11:42:23,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:23,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:23,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:23,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:23,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503213733] [2023-02-15 11:42:23,400 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 11:42:23,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177649114] [2023-02-15 11:42:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:23,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:23,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:23,405 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) [2023-02-15 11:42:23,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 11:42:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:23,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 11:42:23,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:23,558 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-15 11:42:23,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:42:23,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177649114] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:42:23,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:42:23,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 11:42:23,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557149461] [2023-02-15 11:42:23,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:42:23,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 11:42:23,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:23,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 11:42:23,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:42:23,610 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 11:42:23,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:23,643 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2023-02-15 11:42:23,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 11:42:23,646 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-02-15 11:42:23,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:23,654 INFO L225 Difference]: With dead ends: 67 [2023-02-15 11:42:23,654 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 11:42:23,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:42:23,670 INFO L413 NwaCegarLoop]: 46 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, 46 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 [2023-02-15 11:42:23,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:42:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 11:42:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-15 11:42:23,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 11:42:23,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2023-02-15 11:42:23,714 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2023-02-15 11:42:23,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:23,715 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2023-02-15 11:42:23,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 11:42:23,716 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2023-02-15 11:42:23,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 11:42:23,718 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:23,718 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:42:23,725 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:23,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-15 11:42:23,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:23,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:23,925 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2023-02-15 11:42:23,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:23,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874153249] [2023-02-15 11:42:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:23,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:23,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:23,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077106695] [2023-02-15 11:42:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:23,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:23,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:23,961 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) [2023-02-15 11:42:23,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 11:42:24,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:24,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 11:42:24,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 11:42:24,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:24,262 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 11:42:24,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:24,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874153249] [2023-02-15 11:42:24,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:24,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077106695] [2023-02-15 11:42:24,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077106695] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:42:24,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:42:24,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-02-15 11:42:24,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145190028] [2023-02-15 11:42:24,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:42:24,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 11:42:24,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:24,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 11:42:24,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 11:42:24,266 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 11:42:24,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:24,401 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2023-02-15 11:42:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:42:24,401 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2023-02-15 11:42:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:24,405 INFO L225 Difference]: With dead ends: 48 [2023-02-15 11:42:24,405 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 11:42:24,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-15 11:42:24,407 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:24,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 88 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:42:24,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 11:42:24,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-02-15 11:42:24,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 11:42:24,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-02-15 11:42:24,429 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2023-02-15 11:42:24,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:24,430 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-02-15 11:42:24,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-15 11:42:24,431 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-02-15 11:42:24,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 11:42:24,436 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:24,437 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:42:24,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:24,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-15 11:42:24,640 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:24,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:24,641 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2023-02-15 11:42:24,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:24,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600337292] [2023-02-15 11:42:24,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:24,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:24,664 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:24,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [495006955] [2023-02-15 11:42:24,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:24,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:24,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:24,671 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) [2023-02-15 11:42:24,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 11:42:24,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:24,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 11:42:24,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:24,814 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-15 11:42:24,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:24,892 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 11:42:24,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:24,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600337292] [2023-02-15 11:42:24,893 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:24,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495006955] [2023-02-15 11:42:24,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495006955] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 11:42:24,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:42:24,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-15 11:42:24,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782593981] [2023-02-15 11:42:24,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:42:24,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:42:24,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:24,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:42:24,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-15 11:42:24,897 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 11:42:24,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:24,952 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-02-15 11:42:24,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:42:24,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2023-02-15 11:42:24,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:24,954 INFO L225 Difference]: With dead ends: 39 [2023-02-15 11:42:24,955 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 11:42:24,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 11:42:24,959 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 120 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 [2023-02-15 11:42:24,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:42:24,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 11:42:24,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-15 11:42:24,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-15 11:42:24,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-02-15 11:42:24,978 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2023-02-15 11:42:24,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:24,979 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-02-15 11:42:24,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-15 11:42:24,979 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-02-15 11:42:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 11:42:24,980 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:24,980 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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] [2023-02-15 11:42:24,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:25,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:25,182 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:25,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:25,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2023-02-15 11:42:25,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:25,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497899685] [2023-02-15 11:42:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:25,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:25,198 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:25,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1132723436] [2023-02-15 11:42:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:25,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:25,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:25,200 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) [2023-02-15 11:42:25,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 11:42:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:25,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 11:42:25,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:25,476 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-15 11:42:25,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-15 11:42:25,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:25,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497899685] [2023-02-15 11:42:25,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:25,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132723436] [2023-02-15 11:42:25,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132723436] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 11:42:25,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:42:25,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-15 11:42:25,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199976823] [2023-02-15 11:42:25,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:42:25,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:42:25,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:25,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:42:25,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 11:42:25,631 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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) [2023-02-15 11:42:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:25,703 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2023-02-15 11:42:25,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:42:25,706 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 46 [2023-02-15 11:42:25,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:25,708 INFO L225 Difference]: With dead ends: 50 [2023-02-15 11:42:25,708 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 11:42:25,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:42:25,709 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:25,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 141 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:42:25,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 11:42:25,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-02-15 11:42:25,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-15 11:42:25,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2023-02-15 11:42:25,725 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2023-02-15 11:42:25,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:25,726 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2023-02-15 11:42:25,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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) [2023-02-15 11:42:25,727 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2023-02-15 11:42:25,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 11:42:25,728 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:25,728 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2023-02-15 11:42:25,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:25,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:25,937 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:25,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:25,938 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2023-02-15 11:42:25,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:25,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821889021] [2023-02-15 11:42:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:25,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:25,951 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:25,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754661737] [2023-02-15 11:42:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:25,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:25,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:25,953 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) [2023-02-15 11:42:25,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 11:42:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:26,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 11:42:26,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-15 11:42:26,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-15 11:42:26,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:26,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821889021] [2023-02-15 11:42:26,290 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:26,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754661737] [2023-02-15 11:42:26,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754661737] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 11:42:26,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:42:26,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-15 11:42:26,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819115696] [2023-02-15 11:42:26,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:42:26,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:42:26,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:26,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:42:26,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 11:42:26,293 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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) [2023-02-15 11:42:26,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:26,350 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2023-02-15 11:42:26,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:42:26,350 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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 51 [2023-02-15 11:42:26,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:26,351 INFO L225 Difference]: With dead ends: 54 [2023-02-15 11:42:26,352 INFO L226 Difference]: Without dead ends: 52 [2023-02-15 11:42:26,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:42:26,353 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:26,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:42:26,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-15 11:42:26,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-15 11:42:26,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-15 11:42:26,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-02-15 11:42:26,363 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2023-02-15 11:42:26,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:26,363 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-02-15 11:42:26,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (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) [2023-02-15 11:42:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-02-15 11:42:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 11:42:26,365 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:26,365 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1] [2023-02-15 11:42:26,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:26,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:26,576 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:26,577 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2023-02-15 11:42:26,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:26,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538582357] [2023-02-15 11:42:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:26,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:26,589 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:26,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126473017] [2023-02-15 11:42:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:26,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:26,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:26,591 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) [2023-02-15 11:42:26,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 11:42:26,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:26,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 11:42:26,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-15 11:42:26,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:26,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:26,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538582357] [2023-02-15 11:42:26,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:26,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126473017] [2023-02-15 11:42:26,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126473017] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:42:26,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:42:26,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-15 11:42:26,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640203856] [2023-02-15 11:42:26,986 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 11:42:26,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 11:42:26,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:26,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 11:42:26,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:42:26,987 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-15 11:42:27,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:27,184 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2023-02-15 11:42:27,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 11:42:27,185 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2023-02-15 11:42:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:27,187 INFO L225 Difference]: With dead ends: 60 [2023-02-15 11:42:27,187 INFO L226 Difference]: Without dead ends: 58 [2023-02-15 11:42:27,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-02-15 11:42:27,188 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:27,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 97 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:42:27,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-15 11:42:27,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2023-02-15 11:42:27,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-15 11:42:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2023-02-15 11:42:27,212 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2023-02-15 11:42:27,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:27,213 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2023-02-15 11:42:27,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-15 11:42:27,214 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2023-02-15 11:42:27,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-15 11:42:27,215 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:27,215 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:42:27,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 11:42:27,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:27,422 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:27,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:27,422 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2023-02-15 11:42:27,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:27,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250820986] [2023-02-15 11:42:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:27,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:27,441 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:27,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912407607] [2023-02-15 11:42:27,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:27,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:27,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:27,445 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) [2023-02-15 11:42:27,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 11:42:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:27,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 11:42:27,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-15 11:42:27,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-15 11:42:27,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:27,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250820986] [2023-02-15 11:42:27,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:27,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912407607] [2023-02-15 11:42:27,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912407607] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:42:27,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:42:27,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-15 11:42:27,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983755367] [2023-02-15 11:42:27,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:42:27,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 11:42:27,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:27,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 11:42:27,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 11:42:27,661 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-15 11:42:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:27,838 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2023-02-15 11:42:27,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 11:42:27,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2023-02-15 11:42:27,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:27,839 INFO L225 Difference]: With dead ends: 102 [2023-02-15 11:42:27,840 INFO L226 Difference]: Without dead ends: 94 [2023-02-15 11:42:27,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:42:27,841 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:27,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 231 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:42:27,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-15 11:42:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2023-02-15 11:42:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-15 11:42:27,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2023-02-15 11:42:27,860 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2023-02-15 11:42:27,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:27,860 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2023-02-15 11:42:27,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-15 11:42:27,861 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2023-02-15 11:42:27,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 11:42:27,862 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:27,862 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 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, 1, 1, 1, 1] [2023-02-15 11:42:27,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:28,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:28,068 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:28,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:28,068 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2023-02-15 11:42:28,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:28,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71193813] [2023-02-15 11:42:28,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:28,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:28,079 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:28,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1974112433] [2023-02-15 11:42:28,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:28,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:28,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:28,085 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) [2023-02-15 11:42:28,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 11:42:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:28,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 11:42:28,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:28,283 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-15 11:42:28,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:28,407 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-15 11:42:28,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:28,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71193813] [2023-02-15 11:42:28,408 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:28,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974112433] [2023-02-15 11:42:28,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974112433] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:42:28,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:42:28,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-02-15 11:42:28,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434410519] [2023-02-15 11:42:28,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:42:28,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 11:42:28,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:28,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 11:42:28,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-15 11:42:28,410 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-15 11:42:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:28,826 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2023-02-15 11:42:28,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 11:42:28,827 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 71 [2023-02-15 11:42:28,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:28,832 INFO L225 Difference]: With dead ends: 128 [2023-02-15 11:42:28,832 INFO L226 Difference]: Without dead ends: 124 [2023-02-15 11:42:28,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-02-15 11:42:28,834 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 48 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:28,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 203 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 11:42:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-15 11:42:28,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2023-02-15 11:42:28,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-15 11:42:28,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2023-02-15 11:42:28,872 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2023-02-15 11:42:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:28,873 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2023-02-15 11:42:28,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-15 11:42:28,873 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2023-02-15 11:42:28,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-15 11:42:28,876 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:28,876 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 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, 1, 1] [2023-02-15 11:42:28,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:29,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-15 11:42:29,084 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:29,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:29,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2023-02-15 11:42:29,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:29,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828962235] [2023-02-15 11:42:29,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:29,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:29,093 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:29,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809436809] [2023-02-15 11:42:29,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:42:29,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:29,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:29,095 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) [2023-02-15 11:42:29,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 11:42:29,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:42:29,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:42:29,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 11:42:29,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:29,413 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-15 11:42:29,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:34,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:34,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828962235] [2023-02-15 11:42:34,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:34,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809436809] [2023-02-15 11:42:34,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809436809] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:42:34,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:42:34,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-15 11:42:34,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77095242] [2023-02-15 11:42:34,776 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 11:42:34,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 11:42:34,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:34,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 11:42:34,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=148, Unknown=2, NotChecked=0, Total=182 [2023-02-15 11:42:34,777 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-15 11:42:36,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 11:42:37,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:37,104 INFO L93 Difference]: Finished difference Result 124 states and 165 transitions. [2023-02-15 11:42:37,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 11:42:37,105 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 76 [2023-02-15 11:42:37,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:37,106 INFO L225 Difference]: With dead ends: 124 [2023-02-15 11:42:37,106 INFO L226 Difference]: Without dead ends: 122 [2023-02-15 11:42:37,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=59, Invalid=245, Unknown=2, NotChecked=0, Total=306 [2023-02-15 11:42:37,107 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:37,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 176 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 280 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-02-15 11:42:37,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-15 11:42:37,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2023-02-15 11:42:37,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 68 states have internal predecessors, (77), 42 states have call successors, (42), 10 states have call predecessors, (42), 10 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2023-02-15 11:42:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2023-02-15 11:42:37,129 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 76 [2023-02-15 11:42:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:37,129 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2023-02-15 11:42:37,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-15 11:42:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2023-02-15 11:42:37,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-15 11:42:37,131 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:37,131 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 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, 1] [2023-02-15 11:42:37,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:37,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:37,337 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:37,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:37,338 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2023-02-15 11:42:37,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:37,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949588935] [2023-02-15 11:42:37,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:37,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:37,347 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:37,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [260003626] [2023-02-15 11:42:37,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:42:37,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:37,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:37,349 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) [2023-02-15 11:42:37,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 11:42:37,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 11:42:37,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:42:37,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-15 11:42:37,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 43 proven. 20 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-15 11:42:39,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:40,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:40,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949588935] [2023-02-15 11:42:40,337 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:40,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260003626] [2023-02-15 11:42:40,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260003626] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:42:40,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:42:40,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-15 11:42:40,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113992949] [2023-02-15 11:42:40,337 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 11:42:40,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 11:42:40,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:40,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 11:42:40,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2023-02-15 11:42:40,338 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-02-15 11:42:41,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:41,352 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2023-02-15 11:42:41,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 11:42:41,355 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 81 [2023-02-15 11:42:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:41,356 INFO L225 Difference]: With dead ends: 128 [2023-02-15 11:42:41,356 INFO L226 Difference]: Without dead ends: 126 [2023-02-15 11:42:41,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2023-02-15 11:42:41,357 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:41,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 128 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-15 11:42:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-15 11:42:41,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2023-02-15 11:42:41,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2023-02-15 11:42:41,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2023-02-15 11:42:41,377 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 81 [2023-02-15 11:42:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:41,378 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2023-02-15 11:42:41,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-02-15 11:42:41,378 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2023-02-15 11:42:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 11:42:41,379 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:41,379 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1] [2023-02-15 11:42:41,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:41,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 11:42:41,579 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:41,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:41,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2023-02-15 11:42:41,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:41,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377402547] [2023-02-15 11:42:41,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:41,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:41,589 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:41,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872614697] [2023-02-15 11:42:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:41,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:41,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:41,590 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) [2023-02-15 11:42:41,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 11:42:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:41,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 11:42:41,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:42,089 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-02-15 11:42:42,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-02-15 11:42:42,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:42,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377402547] [2023-02-15 11:42:42,829 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:42,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872614697] [2023-02-15 11:42:42,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872614697] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:42:42,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:42:42,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-15 11:42:42,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129265737] [2023-02-15 11:42:42,830 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:42:42,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 11:42:42,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:42,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 11:42:42,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-02-15 11:42:42,832 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-15 11:42:54,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:54,482 INFO L93 Difference]: Finished difference Result 208 states and 295 transitions. [2023-02-15 11:42:54,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-15 11:42:54,485 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 87 [2023-02-15 11:42:54,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:54,486 INFO L225 Difference]: With dead ends: 208 [2023-02-15 11:42:54,486 INFO L226 Difference]: Without dead ends: 204 [2023-02-15 11:42:54,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 11:42:54,488 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 91 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:54,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 482 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-02-15 11:42:54,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-02-15 11:42:54,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2023-02-15 11:42:54,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 107 states have internal predecessors, (127), 79 states have call successors, (79), 14 states have call predecessors, (79), 14 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-15 11:42:54,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 284 transitions. [2023-02-15 11:42:54,546 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 284 transitions. Word has length 87 [2023-02-15 11:42:54,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:54,546 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 284 transitions. [2023-02-15 11:42:54,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-15 11:42:54,547 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 284 transitions. [2023-02-15 11:42:54,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-15 11:42:54,548 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:54,548 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 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] [2023-02-15 11:42:54,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:54,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 11:42:54,754 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:54,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:54,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1140726838, now seen corresponding path program 4 times [2023-02-15 11:42:54,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:54,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098974418] [2023-02-15 11:42:54,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:54,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:54,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:54,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110913404] [2023-02-15 11:42:54,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:42:54,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:54,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:54,768 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) [2023-02-15 11:42:54,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 11:42:54,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:42:54,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:42:54,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 11:42:54,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:54,855 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-15 11:42:54,855 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:42:54,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:54,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098974418] [2023-02-15 11:42:54,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:54,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110913404] [2023-02-15 11:42:54,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110913404] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:42:54,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:42:54,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 11:42:54,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377845744] [2023-02-15 11:42:54,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:42:54,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:42:54,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:54,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:42:54,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 11:42:54,859 INFO L87 Difference]: Start difference. First operand 200 states and 284 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-02-15 11:42:54,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:42:54,965 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2023-02-15 11:42:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:42:54,966 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 101 [2023-02-15 11:42:54,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:42:54,967 INFO L225 Difference]: With dead ends: 253 [2023-02-15 11:42:54,967 INFO L226 Difference]: Without dead ends: 181 [2023-02-15 11:42:54,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-15 11:42:54,972 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:42:54,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 145 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:42:54,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-15 11:42:55,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 167. [2023-02-15 11:42:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 89 states have (on average 1.146067415730337) internal successors, (102), 90 states have internal predecessors, (102), 63 states have call successors, (63), 14 states have call predecessors, (63), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-02-15 11:42:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 227 transitions. [2023-02-15 11:42:55,044 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 227 transitions. Word has length 101 [2023-02-15 11:42:55,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:42:55,045 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 227 transitions. [2023-02-15 11:42:55,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-02-15 11:42:55,045 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 227 transitions. [2023-02-15 11:42:55,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-15 11:42:55,047 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:42:55,047 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:42:55,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 11:42:55,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 11:42:55,253 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:42:55,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:42:55,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2023-02-15 11:42:55,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:42:55,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021193665] [2023-02-15 11:42:55,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:55,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:42:55,275 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:42:55,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812888162] [2023-02-15 11:42:55,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:42:55,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:42:55,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:42:55,277 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) [2023-02-15 11:42:55,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 11:42:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:42:55,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 11:42:55,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:42:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 57 proven. 28 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-02-15 11:42:56,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:42:57,580 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-02-15 11:42:57,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:42:57,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021193665] [2023-02-15 11:42:57,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:42:57,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812888162] [2023-02-15 11:42:57,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812888162] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:42:57,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:42:57,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-02-15 11:42:57,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047752917] [2023-02-15 11:42:57,581 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:42:57,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 11:42:57,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:42:57,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 11:42:57,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-02-15 11:42:57,583 INFO L87 Difference]: Start difference. First operand 167 states and 227 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-15 11:43:00,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:43:07,595 WARN L233 SmtUtils]: Spent 7.00s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 11:43:26,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:43:28,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:43:28,684 INFO L93 Difference]: Finished difference Result 209 states and 287 transitions. [2023-02-15 11:43:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 11:43:28,685 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 103 [2023-02-15 11:43:28,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:43:28,686 INFO L225 Difference]: With dead ends: 209 [2023-02-15 11:43:28,686 INFO L226 Difference]: Without dead ends: 207 [2023-02-15 11:43:28,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=334, Invalid=1225, Unknown=1, NotChecked=0, Total=1560 [2023-02-15 11:43:28,688 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 101 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 147 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:43:28,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 146 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 803 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2023-02-15 11:43:28,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-02-15 11:43:28,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 197. [2023-02-15 11:43:28,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 108 states have internal predecessors, (121), 75 states have call successors, (75), 15 states have call predecessors, (75), 15 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2023-02-15 11:43:28,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 270 transitions. [2023-02-15 11:43:28,751 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 270 transitions. Word has length 103 [2023-02-15 11:43:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:43:28,752 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 270 transitions. [2023-02-15 11:43:28,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-15 11:43:28,752 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 270 transitions. [2023-02-15 11:43:28,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-15 11:43:28,753 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:43:28,753 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:43:28,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 11:43:28,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 11:43:28,959 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:43:28,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:43:28,959 INFO L85 PathProgramCache]: Analyzing trace with hash -349873392, now seen corresponding path program 2 times [2023-02-15 11:43:28,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:43:28,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548754724] [2023-02-15 11:43:28,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:43:28,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:43:28,974 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:43:28,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125073974] [2023-02-15 11:43:28,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:43:28,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:43:28,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:43:28,976 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) [2023-02-15 11:43:29,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 11:43:29,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:43:29,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:43:29,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 11:43:29,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:43:29,636 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 51 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-02-15 11:43:29,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:43:30,497 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 57 proven. 42 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-02-15 11:43:30,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:43:30,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548754724] [2023-02-15 11:43:30,498 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:43:30,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125073974] [2023-02-15 11:43:30,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125073974] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:43:30,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:43:30,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2023-02-15 11:43:30,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847432546] [2023-02-15 11:43:30,499 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:43:30,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 11:43:30,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:43:30,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 11:43:30,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-02-15 11:43:30,501 INFO L87 Difference]: Start difference. First operand 197 states and 270 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2023-02-15 11:43:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:43:49,051 INFO L93 Difference]: Finished difference Result 278 states and 390 transitions. [2023-02-15 11:43:49,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 11:43:49,052 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) Word has length 120 [2023-02-15 11:43:49,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:43:49,053 INFO L225 Difference]: With dead ends: 278 [2023-02-15 11:43:49,053 INFO L226 Difference]: Without dead ends: 276 [2023-02-15 11:43:49,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=459, Invalid=2091, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 11:43:49,055 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 100 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2023-02-15 11:43:49,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 265 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2023-02-15 11:43:49,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-02-15 11:43:49,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 244. [2023-02-15 11:43:49,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 132 states have (on average 1.1515151515151516) internal successors, (152), 136 states have internal predecessors, (152), 93 states have call successors, (93), 18 states have call predecessors, (93), 18 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2023-02-15 11:43:49,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 337 transitions. [2023-02-15 11:43:49,174 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 337 transitions. Word has length 120 [2023-02-15 11:43:49,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:43:49,175 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 337 transitions. [2023-02-15 11:43:49,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2023-02-15 11:43:49,175 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 337 transitions. [2023-02-15 11:43:49,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-15 11:43:49,176 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:43:49,176 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:43:49,184 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 11:43:49,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:43:49,377 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:43:49,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:43:49,377 INFO L85 PathProgramCache]: Analyzing trace with hash -397785577, now seen corresponding path program 3 times [2023-02-15 11:43:49,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:43:49,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731004101] [2023-02-15 11:43:49,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:43:49,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:43:49,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:43:49,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719997404] [2023-02-15 11:43:49,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:43:49,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:43:49,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:43:49,404 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) [2023-02-15 11:43:49,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 11:43:49,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 11:43:49,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:43:49,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-15 11:43:49,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:43:49,911 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 81 proven. 38 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-02-15 11:43:49,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:43:50,395 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 67 proven. 29 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-02-15 11:43:50,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:43:50,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731004101] [2023-02-15 11:43:50,396 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:43:50,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719997404] [2023-02-15 11:43:50,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719997404] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:43:50,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:43:50,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2023-02-15 11:43:50,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127237185] [2023-02-15 11:43:50,397 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:43:50,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 11:43:50,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:43:50,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 11:43:50,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2023-02-15 11:43:50,399 INFO L87 Difference]: Start difference. First operand 244 states and 337 transitions. Second operand has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) [2023-02-15 11:43:52,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:43:52,323 INFO L93 Difference]: Finished difference Result 283 states and 394 transitions. [2023-02-15 11:43:52,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 11:43:52,323 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) Word has length 123 [2023-02-15 11:43:52,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:43:52,325 INFO L225 Difference]: With dead ends: 283 [2023-02-15 11:43:52,325 INFO L226 Difference]: Without dead ends: 281 [2023-02-15 11:43:52,326 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 11:43:52,326 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 46 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-15 11:43:52,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 260 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-15 11:43:52,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-02-15 11:43:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 248. [2023-02-15 11:43:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 139 states have internal predecessors, (155), 93 states have call successors, (93), 19 states have call predecessors, (93), 19 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2023-02-15 11:43:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 340 transitions. [2023-02-15 11:43:52,420 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 340 transitions. Word has length 123 [2023-02-15 11:43:52,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:43:52,421 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 340 transitions. [2023-02-15 11:43:52,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) [2023-02-15 11:43:52,421 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 340 transitions. [2023-02-15 11:43:52,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-15 11:43:52,422 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:43:52,423 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:43:52,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 11:43:52,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-15 11:43:52,628 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:43:52,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:43:52,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2023-02-15 11:43:52,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:43:52,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643071392] [2023-02-15 11:43:52,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:43:52,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:43:52,638 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:43:52,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1986867003] [2023-02-15 11:43:52,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:43:52,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:43:52,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:43:52,640 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) [2023-02-15 11:43:52,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 11:43:52,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:43:52,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:43:52,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-15 11:43:52,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:43:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 113 proven. 94 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2023-02-15 11:43:53,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:43:56,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:43:56,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643071392] [2023-02-15 11:43:56,544 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:43:56,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986867003] [2023-02-15 11:43:56,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986867003] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:43:56,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:43:56,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-15 11:43:56,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949832579] [2023-02-15 11:43:56,544 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 11:43:56,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 11:43:56,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:43:56,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 11:43:56,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2023-02-15 11:43:56,546 INFO L87 Difference]: Start difference. First operand 248 states and 340 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-15 11:43:57,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:43:57,717 INFO L93 Difference]: Finished difference Result 304 states and 411 transitions. [2023-02-15 11:43:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-15 11:43:57,717 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 134 [2023-02-15 11:43:57,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:43:57,719 INFO L225 Difference]: With dead ends: 304 [2023-02-15 11:43:57,719 INFO L226 Difference]: Without dead ends: 297 [2023-02-15 11:43:57,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 11:43:57,720 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 54 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 11:43:57,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 223 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 11:43:57,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-02-15 11:43:57,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 291. [2023-02-15 11:43:57,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 158 states have (on average 1.1455696202531647) internal successors, (181), 162 states have internal predecessors, (181), 109 states have call successors, (109), 23 states have call predecessors, (109), 23 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2023-02-15 11:43:57,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 398 transitions. [2023-02-15 11:43:57,836 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 398 transitions. Word has length 134 [2023-02-15 11:43:57,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:43:57,837 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 398 transitions. [2023-02-15 11:43:57,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-15 11:43:57,837 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 398 transitions. [2023-02-15 11:43:57,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-15 11:43:57,840 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:43:57,840 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:43:57,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 11:43:58,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 11:43:58,043 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:43:58,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:43:58,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1798457687, now seen corresponding path program 4 times [2023-02-15 11:43:58,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:43:58,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733547635] [2023-02-15 11:43:58,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:43:58,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:43:58,052 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:43:58,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609241487] [2023-02-15 11:43:58,052 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:43:58,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:43:58,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:43:58,061 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:43:58,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 11:43:58,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:43:58,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:43:58,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-15 11:43:58,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:43:59,986 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 97 proven. 82 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2023-02-15 11:43:59,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:44:00,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:44:00,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733547635] [2023-02-15 11:44:00,374 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:44:00,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609241487] [2023-02-15 11:44:00,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609241487] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:44:00,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:44:00,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-15 11:44:00,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919993182] [2023-02-15 11:44:00,374 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 11:44:00,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 11:44:00,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:44:00,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 11:44:00,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2023-02-15 11:44:00,376 INFO L87 Difference]: Start difference. First operand 291 states and 398 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2023-02-15 11:44:03,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:44:03,017 INFO L93 Difference]: Finished difference Result 309 states and 414 transitions. [2023-02-15 11:44:03,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 11:44:03,018 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 150 [2023-02-15 11:44:03,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:44:03,020 INFO L225 Difference]: With dead ends: 309 [2023-02-15 11:44:03,020 INFO L226 Difference]: Without dead ends: 307 [2023-02-15 11:44:03,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 11:44:03,021 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 66 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:44:03,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 230 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-02-15 11:44:03,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-02-15 11:44:03,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 299. [2023-02-15 11:44:03,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 164 states have (on average 1.1402439024390243) internal successors, (187), 168 states have internal predecessors, (187), 109 states have call successors, (109), 25 states have call predecessors, (109), 25 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2023-02-15 11:44:03,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 404 transitions. [2023-02-15 11:44:03,152 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 404 transitions. Word has length 150 [2023-02-15 11:44:03,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:44:03,153 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 404 transitions. [2023-02-15 11:44:03,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2023-02-15 11:44:03,153 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 404 transitions. [2023-02-15 11:44:03,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-02-15 11:44:03,154 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:44:03,154 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2023-02-15 11:44:03,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 11:44:03,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 11:44:03,355 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:44:03,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:44:03,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1812352379, now seen corresponding path program 3 times [2023-02-15 11:44:03,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:44:03,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428982245] [2023-02-15 11:44:03,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:44:03,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:44:03,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:44:03,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779304898] [2023-02-15 11:44:03,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:44:03,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:44:03,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:44:03,366 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:44:03,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 11:44:03,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 11:44:03,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:44:03,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 11:44:03,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:44:03,907 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 87 proven. 28 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2023-02-15 11:44:03,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:44:06,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:44:06,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428982245] [2023-02-15 11:44:06,249 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:44:06,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779304898] [2023-02-15 11:44:06,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779304898] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:44:06,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:44:06,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-15 11:44:06,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290570235] [2023-02-15 11:44:06,250 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 11:44:06,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 11:44:06,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:44:06,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 11:44:06,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=225, Unknown=1, NotChecked=0, Total=272 [2023-02-15 11:44:06,251 INFO L87 Difference]: Start difference. First operand 299 states and 404 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-15 11:44:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:44:06,589 INFO L93 Difference]: Finished difference Result 344 states and 466 transitions. [2023-02-15 11:44:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 11:44:06,590 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 153 [2023-02-15 11:44:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:44:06,592 INFO L225 Difference]: With dead ends: 344 [2023-02-15 11:44:06,592 INFO L226 Difference]: Without dead ends: 337 [2023-02-15 11:44:06,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=75, Invalid=344, Unknown=1, NotChecked=0, Total=420 [2023-02-15 11:44:06,593 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:44:06,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 174 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:44:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-02-15 11:44:06,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 319. [2023-02-15 11:44:06,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 174 states have (on average 1.1379310344827587) internal successors, (198), 178 states have internal predecessors, (198), 117 states have call successors, (117), 27 states have call predecessors, (117), 27 states have return successors, (116), 113 states have call predecessors, (116), 116 states have call successors, (116) [2023-02-15 11:44:06,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 431 transitions. [2023-02-15 11:44:06,776 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 431 transitions. Word has length 153 [2023-02-15 11:44:06,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:44:06,776 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 431 transitions. [2023-02-15 11:44:06,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-15 11:44:06,776 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 431 transitions. [2023-02-15 11:44:06,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-02-15 11:44:06,780 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:44:06,781 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:44:06,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 11:44:06,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 11:44:06,986 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:44:06,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:44:06,987 INFO L85 PathProgramCache]: Analyzing trace with hash 2018058068, now seen corresponding path program 4 times [2023-02-15 11:44:06,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:44:06,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518080600] [2023-02-15 11:44:06,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:44:06,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:44:06,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:44:06,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [346029327] [2023-02-15 11:44:06,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:44:06,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:44:06,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:44:06,996 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:44:06,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 11:44:07,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:44:07,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:44:07,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-15 11:44:07,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:44:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 46 proven. 85 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2023-02-15 11:44:08,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:44:10,181 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2023-02-15 11:44:10,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:44:10,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518080600] [2023-02-15 11:44:10,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:44:10,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346029327] [2023-02-15 11:44:10,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346029327] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:44:10,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:44:10,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2023-02-15 11:44:10,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908895405] [2023-02-15 11:44:10,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:44:10,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 11:44:10,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:44:10,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 11:44:10,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2023-02-15 11:44:10,184 INFO L87 Difference]: Start difference. First operand 319 states and 431 transitions. Second operand has 30 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 17 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2023-02-15 11:44:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:44:54,134 INFO L93 Difference]: Finished difference Result 501 states and 720 transitions. [2023-02-15 11:44:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-15 11:44:54,134 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 17 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) Word has length 156 [2023-02-15 11:44:54,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:44:54,137 INFO L225 Difference]: With dead ends: 501 [2023-02-15 11:44:54,137 INFO L226 Difference]: Without dead ends: 493 [2023-02-15 11:44:54,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=1063, Invalid=4789, Unknown=0, NotChecked=0, Total=5852 [2023-02-15 11:44:54,139 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 186 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 2980 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 3342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 2980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.4s IncrementalHoareTripleChecker+Time [2023-02-15 11:44:54,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 943 Invalid, 3342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 2980 Invalid, 0 Unknown, 0 Unchecked, 19.4s Time] [2023-02-15 11:44:54,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-02-15 11:44:54,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 451. [2023-02-15 11:44:54,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 232 states have (on average 1.1724137931034482) internal successors, (272), 238 states have internal predecessors, (272), 188 states have call successors, (188), 30 states have call predecessors, (188), 30 states have return successors, (187), 182 states have call predecessors, (187), 187 states have call successors, (187) [2023-02-15 11:44:54,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 647 transitions. [2023-02-15 11:44:54,426 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 647 transitions. Word has length 156 [2023-02-15 11:44:54,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:44:54,427 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 647 transitions. [2023-02-15 11:44:54,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 17 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2023-02-15 11:44:54,427 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 647 transitions. [2023-02-15 11:44:54,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-02-15 11:44:54,429 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:44:54,429 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:44:54,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 11:44:54,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:44:54,634 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:44:54,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:44:54,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1664660918, now seen corresponding path program 5 times [2023-02-15 11:44:54,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:44:54,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126307719] [2023-02-15 11:44:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:44:54,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:44:54,642 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:44:54,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549927949] [2023-02-15 11:44:54,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:44:54,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:44:54,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:44:54,644 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:44:54,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 11:44:54,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-15 11:44:54,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:44:54,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-15 11:44:54,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:44:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2023-02-15 11:44:55,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:44:59,300 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2023-02-15 11:44:59,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:44:59,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126307719] [2023-02-15 11:44:59,301 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:44:59,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549927949] [2023-02-15 11:44:59,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549927949] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:44:59,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:44:59,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-02-15 11:44:59,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456769455] [2023-02-15 11:44:59,301 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:44:59,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 11:44:59,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:44:59,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 11:44:59,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2023-02-15 11:44:59,302 INFO L87 Difference]: Start difference. First operand 451 states and 647 transitions. Second operand has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 15 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 13 states have call predecessors, (48), 13 states have call successors, (48) [2023-02-15 11:45:04,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:22,892 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:24,243 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:28,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:33,415 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:41,102 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:48,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:45:53,235 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 11:46:02,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:46:02,085 INFO L93 Difference]: Finished difference Result 661 states and 977 transitions. [2023-02-15 11:46:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-15 11:46:02,086 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 15 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 13 states have call predecessors, (48), 13 states have call successors, (48) Word has length 156 [2023-02-15 11:46:02,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:46:02,089 INFO L225 Difference]: With dead ends: 661 [2023-02-15 11:46:02,089 INFO L226 Difference]: Without dead ends: 652 [2023-02-15 11:46:02,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 24.5s TimeCoverageRelationStatistics Valid=1025, Invalid=4981, Unknown=0, NotChecked=0, Total=6006 [2023-02-15 11:46:02,092 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 151 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 407 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 2794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.6s IncrementalHoareTripleChecker+Time [2023-02-15 11:46:02,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 864 Invalid, 2794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 2384 Invalid, 3 Unknown, 0 Unchecked, 40.6s Time] [2023-02-15 11:46:02,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2023-02-15 11:46:02,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 599. [2023-02-15 11:46:02,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 299 states have (on average 1.1806020066889633) internal successors, (353), 303 states have internal predecessors, (353), 265 states have call successors, (265), 34 states have call predecessors, (265), 34 states have return successors, (264), 261 states have call predecessors, (264), 264 states have call successors, (264) [2023-02-15 11:46:02,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 882 transitions. [2023-02-15 11:46:02,503 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 882 transitions. Word has length 156 [2023-02-15 11:46:02,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:46:02,504 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 882 transitions. [2023-02-15 11:46:02,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 15 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 13 states have call predecessors, (48), 13 states have call successors, (48) [2023-02-15 11:46:02,504 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 882 transitions. [2023-02-15 11:46:02,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-02-15 11:46:02,506 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:46:02,507 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:46:02,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 11:46:02,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:46:02,713 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:46:02,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:46:02,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1404546792, now seen corresponding path program 5 times [2023-02-15 11:46:02,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:46:02,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276246040] [2023-02-15 11:46:02,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:46:02,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:46:02,732 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 11:46:02,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1229742502] [2023-02-15 11:46:02,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:46:02,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:46:02,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:46:02,734 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:46:02,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 11:46:02,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-02-15 11:46:02,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:46:02,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-15 11:46:02,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:46:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 114 proven. 105 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2023-02-15 11:46:04,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:46:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 111 proven. 93 refuted. 0 times theorem prover too weak. 1006 trivial. 0 not checked. [2023-02-15 11:46:12,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:46:12,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276246040] [2023-02-15 11:46:12,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 11:46:12,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229742502] [2023-02-15 11:46:12,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229742502] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:46:12,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 11:46:12,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-02-15 11:46:12,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022016181] [2023-02-15 11:46:12,541 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 11:46:12,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 11:46:12,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:46:12,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 11:46:12,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2023-02-15 11:46:12,543 INFO L87 Difference]: Start difference. First operand 599 states and 882 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 29 states have internal predecessors, (62), 17 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (57), 17 states have call predecessors, (57), 16 states have call successors, (57) [2023-02-15 11:46:32,249 WARN L233 SmtUtils]: Spent 15.99s on a formula simplification that was a NOOP. DAG size: 163 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 11:46:41,209 WARN L233 SmtUtils]: Spent 7.54s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)