./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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_valuebound100.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f5697d76d3e5ae232d0e056ee307ac88ca38e983a94c4765bc5d51f77e79d2f7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 20:43:37,798 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 20:43:37,799 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 20:43:37,836 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 20:43:37,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 20:43:37,840 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 20:43:37,841 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 20:43:37,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 20:43:37,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 20:43:37,848 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 20:43:37,849 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 20:43:37,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 20:43:37,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 20:43:37,856 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 20:43:37,857 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 20:43:37,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 20:43:37,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 20:43:37,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 20:43:37,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 20:43:37,865 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 20:43:37,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 20:43:37,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 20:43:37,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 20:43:37,872 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 20:43:37,875 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 20:43:37,875 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 20:43:37,875 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 20:43:37,876 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 20:43:37,876 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 20:43:37,877 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 20:43:37,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 20:43:37,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 20:43:37,879 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 20:43:37,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 20:43:37,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 20:43:37,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 20:43:37,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 20:43:37,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 20:43:37,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 20:43:37,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 20:43:37,883 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 20:43:37,888 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 20:43:37,909 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 20:43:37,910 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 20:43:37,910 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 20:43:37,910 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 20:43:37,911 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 20:43:37,911 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 20:43:37,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 20:43:37,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 20:43:37,911 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 20:43:37,912 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 20:43:37,912 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 20:43:37,912 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 20:43:37,912 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 20:43:37,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 20:43:37,912 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 20:43:37,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 20:43:37,913 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 20:43:37,913 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 20:43:37,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 20:43:37,913 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 20:43:37,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 20:43:37,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 20:43:37,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 20:43:37,914 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 20:43:37,914 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:43:37,914 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 20:43:37,914 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 20:43:37,914 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 20:43:37,915 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 20:43:37,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 20:43:37,915 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 20:43:37,915 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 20:43:37,915 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 20:43:37,915 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 20:43:37,916 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 20:43:37,916 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5697d76d3e5ae232d0e056ee307ac88ca38e983a94c4765bc5d51f77e79d2f7 [2023-02-15 20:43:38,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 20:43:38,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 20:43:38,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 20:43:38,148 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 20:43:38,149 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 20:43:38,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2023-02-15 20:43:39,207 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 20:43:39,384 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 20:43:39,385 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound100.c [2023-02-15 20:43:39,390 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1f9b380c/fb43d7e2bdf6462290a3119b4d1e13b4/FLAG80897f8ef [2023-02-15 20:43:39,400 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1f9b380c/fb43d7e2bdf6462290a3119b4d1e13b4 [2023-02-15 20:43:39,402 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 20:43:39,403 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 20:43:39,404 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 20:43:39,404 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 20:43:39,407 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 20:43:39,407 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:43:39" (1/1) ... [2023-02-15 20:43:39,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3555ac47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:43:39, skipping insertion in model container [2023-02-15 20:43:39,411 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:43:39" (1/1) ... [2023-02-15 20:43:39,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 20:43:39,429 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 20:43:39,528 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_valuebound100.c[490,503] [2023-02-15 20:43:39,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:43:39,563 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 20:43:39,572 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_valuebound100.c[490,503] [2023-02-15 20:43:39,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:43:39,594 INFO L208 MainTranslator]: Completed translation [2023-02-15 20:43:39,595 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:43:39 WrapperNode [2023-02-15 20:43:39,595 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 20:43:39,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 20:43:39,596 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 20:43:39,596 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 20:43:39,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:43:39" (1/1) ... [2023-02-15 20:43:39,607 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:43:39" (1/1) ... [2023-02-15 20:43:39,621 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2023-02-15 20:43:39,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 20:43:39,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 20:43:39,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 20:43:39,623 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 20:43:39,629 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:43:39" (1/1) ... [2023-02-15 20:43:39,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:43:39" (1/1) ... [2023-02-15 20:43:39,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:43:39" (1/1) ... [2023-02-15 20:43:39,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:43:39" (1/1) ... [2023-02-15 20:43:39,637 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:43:39" (1/1) ... [2023-02-15 20:43:39,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:43:39" (1/1) ... [2023-02-15 20:43:39,645 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:43:39" (1/1) ... [2023-02-15 20:43:39,646 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:43:39" (1/1) ... [2023-02-15 20:43:39,647 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 20:43:39,648 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 20:43:39,648 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 20:43:39,648 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 20:43:39,649 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:43:39" (1/1) ... [2023-02-15 20:43:39,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:43:39,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:39,676 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 20:43:39,678 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 20:43:39,706 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 20:43:39,706 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-15 20:43:39,706 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-15 20:43:39,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 20:43:39,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 20:43:39,707 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 20:43:39,707 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-15 20:43:39,707 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-15 20:43:39,768 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 20:43:39,771 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 20:43:39,993 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 20:43:40,001 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 20:43:40,001 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 20:43:40,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:43:40 BoogieIcfgContainer [2023-02-15 20:43:40,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 20:43:40,005 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 20:43:40,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 20:43:40,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 20:43:40,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 08:43:39" (1/3) ... [2023-02-15 20:43:40,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3147302e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:43:40, skipping insertion in model container [2023-02-15 20:43:40,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:43:39" (2/3) ... [2023-02-15 20:43:40,008 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3147302e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:43:40, skipping insertion in model container [2023-02-15 20:43:40,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:43:40" (3/3) ... [2023-02-15 20:43:40,009 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.c [2023-02-15 20:43:40,022 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 20:43:40,023 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 20:43:40,074 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 20:43:40,080 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;@5650e82c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 20:43:40,080 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 20:43:40,085 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 20:43:40,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 20:43:40,093 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:40,093 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 20:43:40,094 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:40,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:40,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2023-02-15 20:43:40,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:40,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749526644] [2023-02-15 20:43:40,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:40,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:40,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:43:40,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:40,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749526644] [2023-02-15 20:43:40,208 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-15 20:43:40,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164928041] [2023-02-15 20:43:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:40,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:40,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:40,213 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 20:43:40,243 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 20:43:40,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:43:40,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-15 20:43:40,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:40,343 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 20:43:40,343 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:43:40,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164928041] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:43:40,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:43:40,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 20:43:40,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460286180] [2023-02-15 20:43:40,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:43:40,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 20:43:40,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:40,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 20:43:40,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:43:40,383 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 20:43:40,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:43:40,403 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2023-02-15 20:43:40,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 20:43:40,404 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 20:43:40,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:43:40,410 INFO L225 Difference]: With dead ends: 67 [2023-02-15 20:43:40,410 INFO L226 Difference]: Without dead ends: 31 [2023-02-15 20:43:40,413 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 20:43:40,416 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 20:43:40,417 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 20:43:40,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-15 20:43:40,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-15 20:43:40,452 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 20:43:40,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2023-02-15 20:43:40,457 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2023-02-15 20:43:40,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:43:40,458 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2023-02-15 20:43:40,458 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 20:43:40,459 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2023-02-15 20:43:40,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 20:43:40,461 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:40,462 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 20:43:40,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 20:43:40,667 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 20:43:40,667 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:40,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:40,668 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2023-02-15 20:43:40,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:40,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055561378] [2023-02-15 20:43:40,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:40,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:40,695 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:43:40,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917091638] [2023-02-15 20:43:40,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:40,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:40,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:40,697 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 20:43:40,708 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 20:43:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:43:40,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:43:40,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:40,859 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 20:43:40,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:43:40,953 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 20:43:40,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:40,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055561378] [2023-02-15 20:43:40,954 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:43:40,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917091638] [2023-02-15 20:43:40,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917091638] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:43:40,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:43:40,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-02-15 20:43:40,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457295013] [2023-02-15 20:43:40,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:43:40,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 20:43:40,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:40,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 20:43:40,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-15 20:43:40,973 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 20:43:41,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:43:41,098 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2023-02-15 20:43:41,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:43:41,098 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 20:43:41,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:43:41,100 INFO L225 Difference]: With dead ends: 48 [2023-02-15 20:43:41,100 INFO L226 Difference]: Without dead ends: 40 [2023-02-15 20:43:41,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:43:41,101 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 20:43:41,102 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 20:43:41,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-15 20:43:41,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-02-15 20:43:41,131 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 20:43:41,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-02-15 20:43:41,133 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2023-02-15 20:43:41,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:43:41,133 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-02-15 20:43:41,134 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 20:43:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-02-15 20:43:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-15 20:43:41,135 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:41,135 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 20:43:41,143 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 20:43:41,341 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 20:43:41,341 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:41,342 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2023-02-15 20:43:41,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:41,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107078514] [2023-02-15 20:43:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:41,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:41,358 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:43:41,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077004240] [2023-02-15 20:43:41,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:41,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:41,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:41,365 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 20:43:41,371 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 20:43:41,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:43:41,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 20:43:41,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:41,544 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 20:43:41,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:43:41,678 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 20:43:41,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:41,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107078514] [2023-02-15 20:43:41,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:43:41,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077004240] [2023-02-15 20:43:41,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077004240] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:43:41,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:43:41,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-15 20:43:41,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055607058] [2023-02-15 20:43:41,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:43:41,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:43:41,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:41,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:43:41,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-15 20:43:41,690 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 20:43:41,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:43:41,764 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-02-15 20:43:41,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:43:41,765 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 20:43:41,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:43:41,766 INFO L225 Difference]: With dead ends: 39 [2023-02-15 20:43:41,768 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 20:43:41,769 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 20:43:41,770 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 20:43:41,771 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 20:43:41,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 20:43:41,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-15 20:43:41,783 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 20:43:41,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-02-15 20:43:41,785 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2023-02-15 20:43:41,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:43:41,786 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-02-15 20:43:41,787 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 20:43:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-02-15 20:43:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-15 20:43:41,788 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:41,788 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 20:43:41,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 20:43:41,995 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 20:43:41,996 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:41,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:41,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2023-02-15 20:43:41,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:41,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796841723] [2023-02-15 20:43:41,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:41,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:42,015 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:43:42,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977763425] [2023-02-15 20:43:42,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:42,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:42,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:42,017 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 20:43:42,020 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 20:43:42,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:43:42,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-15 20:43:42,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:42,315 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 20:43:42,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:43:42,444 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 20:43:42,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:42,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796841723] [2023-02-15 20:43:42,445 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:43:42,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977763425] [2023-02-15 20:43:42,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977763425] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-15 20:43:42,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:43:42,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-15 20:43:42,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879508590] [2023-02-15 20:43:42,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:43:42,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:43:42,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:42,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:43:42,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:43:42,449 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 20:43:42,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:43:42,510 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2023-02-15 20:43:42,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:43:42,513 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 20:43:42,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:43:42,516 INFO L225 Difference]: With dead ends: 50 [2023-02-15 20:43:42,516 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 20:43:42,517 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 20:43:42,524 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 20:43:42,525 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 20:43:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 20:43:42,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-02-15 20:43:42,539 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 20:43:42,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2023-02-15 20:43:42,542 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2023-02-15 20:43:42,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:43:42,544 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2023-02-15 20:43:42,544 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 20:43:42,544 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2023-02-15 20:43:42,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 20:43:42,545 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:42,545 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 20:43:42,557 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 20:43:42,751 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 20:43:42,751 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:42,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:42,752 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2023-02-15 20:43:42,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:42,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519673393] [2023-02-15 20:43:42,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:42,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:42,767 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:43:42,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1660219927] [2023-02-15 20:43:42,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:42,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:42,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:42,768 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 20:43:42,784 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 20:43:42,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:43:42,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 20:43:42,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-15 20:43:42,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:43:42,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:42,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519673393] [2023-02-15 20:43:42,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:43:42,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660219927] [2023-02-15 20:43:42,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660219927] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:43:42,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:43:42,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-15 20:43:42,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332530039] [2023-02-15 20:43:42,985 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:43:42,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 20:43:42,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:42,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 20:43:42,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:43:42,987 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 20:43:43,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:43:43,079 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2023-02-15 20:43:43,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 20:43:43,080 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2023-02-15 20:43:43,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:43:43,081 INFO L225 Difference]: With dead ends: 54 [2023-02-15 20:43:43,081 INFO L226 Difference]: Without dead ends: 52 [2023-02-15 20:43:43,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-02-15 20:43:43,082 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:43:43,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 122 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:43:43,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-15 20:43:43,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-15 20:43:43,092 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 20:43:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-02-15 20:43:43,093 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2023-02-15 20:43:43,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:43:43,094 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-02-15 20:43:43,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-15 20:43:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-02-15 20:43:43,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 20:43:43,095 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:43,095 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 20:43:43,107 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 20:43:43,303 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 20:43:43,303 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:43,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:43,304 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2023-02-15 20:43:43,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:43,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387897369] [2023-02-15 20:43:43,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:43,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:43,321 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:43:43,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1330317006] [2023-02-15 20:43:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:43,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:43,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:43,323 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 20:43:43,345 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 20:43:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:43:43,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-15 20:43:43,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-02-15 20:43:43,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:43:43,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:43,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387897369] [2023-02-15 20:43:43,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:43:43,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330317006] [2023-02-15 20:43:43,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330317006] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:43:43,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:43:43,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-15 20:43:43,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75939106] [2023-02-15 20:43:43,793 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:43:43,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 20:43:43,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:43,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 20:43:43,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=67, Unknown=1, NotChecked=0, Total=90 [2023-02-15 20:43:43,794 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 20:43:43,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:43:43,926 INFO L93 Difference]: Finished difference Result 58 states and 70 transitions. [2023-02-15 20:43:43,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 20:43:43,927 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2023-02-15 20:43:43,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:43:43,928 INFO L225 Difference]: With dead ends: 58 [2023-02-15 20:43:43,928 INFO L226 Difference]: Without dead ends: 56 [2023-02-15 20:43:43,929 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=96, Unknown=1, NotChecked=0, Total=132 [2023-02-15 20:43:43,929 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:43:43,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 118 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:43:43,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-15 20:43:43,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2023-02-15 20:43:43,953 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 20:43:43,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2023-02-15 20:43:43,954 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2023-02-15 20:43:43,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:43:43,954 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2023-02-15 20:43:43,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 20:43:43,954 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2023-02-15 20:43:43,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-15 20:43:43,955 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:43,956 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 20:43:43,963 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 20:43:44,156 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 20:43:44,157 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:44,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:44,157 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2023-02-15 20:43:44,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:44,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331631383] [2023-02-15 20:43:44,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:44,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:44,169 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:43:44,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005212023] [2023-02-15 20:43:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:44,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:44,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:44,186 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 20:43:44,188 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 20:43:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:43:44,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-15 20:43:44,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:44,309 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 20:43:44,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:43:44,403 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 20:43:44,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:44,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331631383] [2023-02-15 20:43:44,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:43:44,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005212023] [2023-02-15 20:43:44,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005212023] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:43:44,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:43:44,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-15 20:43:44,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096858986] [2023-02-15 20:43:44,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:43:44,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 20:43:44,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:44,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 20:43:44,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:43:44,407 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 20:43:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:43:44,578 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2023-02-15 20:43:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 20:43:44,578 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 20:43:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:43:44,579 INFO L225 Difference]: With dead ends: 102 [2023-02-15 20:43:44,580 INFO L226 Difference]: Without dead ends: 94 [2023-02-15 20:43:44,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 116 SyntacticMatches, 5 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 20:43:44,581 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:43:44,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 195 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:43:44,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-15 20:43:44,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2023-02-15 20:43:44,613 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 20:43:44,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2023-02-15 20:43:44,614 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2023-02-15 20:43:44,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:43:44,615 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2023-02-15 20:43:44,615 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 20:43:44,615 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2023-02-15 20:43:44,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 20:43:44,616 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:44,616 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 20:43:44,627 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 20:43:44,822 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 20:43:44,822 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:44,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:44,823 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2023-02-15 20:43:44,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:44,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492758978] [2023-02-15 20:43:44,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:44,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:44,843 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:43:44,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2135171313] [2023-02-15 20:43:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:44,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:44,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:44,848 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 20:43:44,850 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 20:43:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:43:44,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 20:43:44,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-15 20:43:44,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:43:45,082 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 20:43:45,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:45,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492758978] [2023-02-15 20:43:45,082 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:43:45,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135171313] [2023-02-15 20:43:45,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135171313] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:43:45,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:43:45,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2023-02-15 20:43:45,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443836885] [2023-02-15 20:43:45,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:43:45,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 20:43:45,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:45,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 20:43:45,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-02-15 20:43:45,085 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-15 20:43:45,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:43:45,236 INFO L93 Difference]: Finished difference Result 95 states and 130 transitions. [2023-02-15 20:43:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 20:43:45,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 71 [2023-02-15 20:43:45,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:43:45,239 INFO L225 Difference]: With dead ends: 95 [2023-02-15 20:43:45,239 INFO L226 Difference]: Without dead ends: 92 [2023-02-15 20:43:45,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:43:45,240 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 18 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:43:45,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 154 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:43:45,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-15 20:43:45,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2023-02-15 20:43:45,264 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 20:43:45,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2023-02-15 20:43:45,265 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2023-02-15 20:43:45,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:43:45,265 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2023-02-15 20:43:45,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-02-15 20:43:45,266 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2023-02-15 20:43:45,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-15 20:43:45,267 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:45,267 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 20:43:45,273 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 20:43:45,472 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 20:43:45,472 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:45,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:45,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2023-02-15 20:43:45,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:45,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856835226] [2023-02-15 20:43:45,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:45,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:45,494 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:43:45,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059861863] [2023-02-15 20:43:45,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:43:45,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:45,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:45,500 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 20:43:45,502 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 20:43:45,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:43:45,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:43:45,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-15 20:43:45,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-15 20:43:46,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:43:46,220 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-15 20:43:46,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:46,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856835226] [2023-02-15 20:43:46,220 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:43:46,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059861863] [2023-02-15 20:43:46,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059861863] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:43:46,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:43:46,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2023-02-15 20:43:46,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417074922] [2023-02-15 20:43:46,223 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:43:46,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 20:43:46,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:46,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 20:43:46,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-02-15 20:43:46,226 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 9 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2023-02-15 20:43:49,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:43:49,396 INFO L93 Difference]: Finished difference Result 134 states and 181 transitions. [2023-02-15 20:43:49,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 20:43:49,396 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 9 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) Word has length 76 [2023-02-15 20:43:49,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:43:49,398 INFO L225 Difference]: With dead ends: 134 [2023-02-15 20:43:49,398 INFO L226 Difference]: Without dead ends: 132 [2023-02-15 20:43:49,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 20:43:49,399 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 79 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-15 20:43:49,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 191 Invalid, 896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 793 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-15 20:43:49,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-15 20:43:49,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 113. [2023-02-15 20:43:49,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 64 states have (on average 1.171875) internal successors, (75), 66 states have internal predecessors, (75), 38 states have call successors, (38), 10 states have call predecessors, (38), 10 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2023-02-15 20:43:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 150 transitions. [2023-02-15 20:43:49,428 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 150 transitions. Word has length 76 [2023-02-15 20:43:49,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:43:49,428 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 150 transitions. [2023-02-15 20:43:49,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 9 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 9 states have call predecessors, (23), 9 states have call successors, (23) [2023-02-15 20:43:49,429 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 150 transitions. [2023-02-15 20:43:49,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-15 20:43:49,430 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:49,430 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 20:43:49,436 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 20:43:49,635 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 20:43:49,635 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:49,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:49,636 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2023-02-15 20:43:49,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:49,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709178868] [2023-02-15 20:43:49,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:49,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:49,648 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:43:49,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [169780091] [2023-02-15 20:43:49,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:43:49,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:49,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:49,653 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 20:43:49,668 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 20:43:49,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 20:43:49,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:43:49,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 20:43:49,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:50,091 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 46 proven. 8 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2023-02-15 20:43:50,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:43:50,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:50,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709178868] [2023-02-15 20:43:50,417 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:43:50,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169780091] [2023-02-15 20:43:50,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169780091] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:43:50,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:43:50,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-15 20:43:50,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425354312] [2023-02-15 20:43:50,418 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:43:50,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 20:43:50,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:50,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 20:43:50,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2023-02-15 20:43:50,419 INFO L87 Difference]: Start difference. First operand 113 states and 150 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-02-15 20:43:51,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:43:51,032 INFO L93 Difference]: Finished difference Result 149 states and 192 transitions. [2023-02-15 20:43:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 20:43:51,033 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 81 [2023-02-15 20:43:51,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:43:51,034 INFO L225 Difference]: With dead ends: 149 [2023-02-15 20:43:51,034 INFO L226 Difference]: Without dead ends: 147 [2023-02-15 20:43:51,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:43:51,036 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 31 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 20:43:51,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 153 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 20:43:51,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-02-15 20:43:51,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2023-02-15 20:43:51,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 83 states have (on average 1.1566265060240963) internal successors, (96), 85 states have internal predecessors, (96), 46 states have call successors, (46), 14 states have call predecessors, (46), 14 states have return successors, (45), 44 states have call predecessors, (45), 45 states have call successors, (45) [2023-02-15 20:43:51,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 187 transitions. [2023-02-15 20:43:51,076 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 187 transitions. Word has length 81 [2023-02-15 20:43:51,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:43:51,077 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 187 transitions. [2023-02-15 20:43:51,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2023-02-15 20:43:51,077 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 187 transitions. [2023-02-15 20:43:51,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 20:43:51,082 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:43:51,083 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 20:43:51,089 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 20:43:51,288 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 20:43:51,288 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:43:51,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:43:51,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2023-02-15 20:43:51,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:43:51,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561214636] [2023-02-15 20:43:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:51,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:43:51,311 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:43:51,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [182124358] [2023-02-15 20:43:51,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:43:51,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:43:51,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:43:51,316 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 20:43:51,318 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 20:43:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:43:51,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 20:43:51,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:43:51,927 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 19 proven. 29 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2023-02-15 20:43:51,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:43:52,547 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 20:43:52,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:43:52,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561214636] [2023-02-15 20:43:52,548 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:43:52,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182124358] [2023-02-15 20:43:52,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182124358] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:43:52,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:43:52,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2023-02-15 20:43:52,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253485027] [2023-02-15 20:43:52,549 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:43:52,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 20:43:52,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:43:52,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 20:43:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2023-02-15 20:43:52,550 INFO L87 Difference]: Start difference. First operand 144 states and 187 transitions. Second operand has 22 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 11 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-15 20:44:00,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:44:00,929 INFO L93 Difference]: Finished difference Result 234 states and 322 transitions. [2023-02-15 20:44:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 20:44:00,930 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 11 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 87 [2023-02-15 20:44:00,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:44:00,931 INFO L225 Difference]: With dead ends: 234 [2023-02-15 20:44:00,932 INFO L226 Difference]: Without dead ends: 226 [2023-02-15 20:44:00,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=337, Invalid=1469, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 20:44:00,933 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 96 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 1179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-02-15 20:44:00,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 409 Invalid, 1179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-02-15 20:44:00,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-02-15 20:44:00,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2023-02-15 20:44:00,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 122 states have (on average 1.180327868852459) internal successors, (144), 124 states have internal predecessors, (144), 82 states have call successors, (82), 17 states have call predecessors, (82), 17 states have return successors, (81), 80 states have call predecessors, (81), 81 states have call successors, (81) [2023-02-15 20:44:01,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 307 transitions. [2023-02-15 20:44:01,001 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 307 transitions. Word has length 87 [2023-02-15 20:44:01,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:44:01,001 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 307 transitions. [2023-02-15 20:44:01,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 1.9) internal successors, (38), 19 states have internal predecessors, (38), 11 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-15 20:44:01,001 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 307 transitions. [2023-02-15 20:44:01,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-15 20:44:01,003 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:44:01,003 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 20:44:01,008 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 20:44:01,208 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 20:44:01,208 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:44:01,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:44:01,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2023-02-15 20:44:01,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:44:01,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511982197] [2023-02-15 20:44:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:01,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:44:01,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:44:01,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156803529] [2023-02-15 20:44:01,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:44:01,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:44:01,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:44:01,228 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 20:44:01,231 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 20:44:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:44:01,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-15 20:44:01,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:44:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 85 proven. 42 refuted. 0 times theorem prover too weak. 193 trivial. 0 not checked. [2023-02-15 20:44:02,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:44:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 79 proven. 33 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2023-02-15 20:44:12,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:44:12,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511982197] [2023-02-15 20:44:12,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:44:12,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156803529] [2023-02-15 20:44:12,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156803529] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:44:12,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:44:12,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 24 [2023-02-15 20:44:12,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110938127] [2023-02-15 20:44:12,086 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:44:12,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 20:44:12,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:44:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 20:44:12,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2023-02-15 20:44:12,094 INFO L87 Difference]: Start difference. First operand 222 states and 307 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 19 states have internal predecessors, (44), 12 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 13 states have call predecessors, (32), 11 states have call successors, (32) [2023-02-15 20:44:15,881 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 20:44:18,857 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:44:20,878 WARN L539 Checker$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 20:44:23,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:44:33,162 WARN L539 Checker$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 20:44:35,169 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:44:39,049 WARN L539 Checker$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 20:44:48,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:44:53,744 WARN L539 Checker$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 20:45:03,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-15 20:45:05,610 WARN L539 Checker$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 20:45:08,538 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 20:45:17,873 WARN L233 SmtUtils]: Spent 8.88s on a formula simplification. DAG size of input: 73 DAG size of output: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 20:45:18,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:45:18,130 INFO L93 Difference]: Finished difference Result 281 states and 393 transitions. [2023-02-15 20:45:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 20:45:18,130 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 19 states have internal predecessors, (44), 12 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 13 states have call predecessors, (32), 11 states have call successors, (32) Word has length 103 [2023-02-15 20:45:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:45:18,132 INFO L225 Difference]: With dead ends: 281 [2023-02-15 20:45:18,132 INFO L226 Difference]: Without dead ends: 279 [2023-02-15 20:45:18,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 176 SyntacticMatches, 6 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=391, Invalid=1415, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 20:45:18,134 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 90 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 158 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:45:18,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 194 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1023 Invalid, 12 Unknown, 0 Unchecked, 35.1s Time] [2023-02-15 20:45:18,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-02-15 20:45:18,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 267. [2023-02-15 20:45:18,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 147 states have (on average 1.1768707482993197) internal successors, (173), 152 states have internal predecessors, (173), 101 states have call successors, (101), 18 states have call predecessors, (101), 18 states have return successors, (100), 96 states have call predecessors, (100), 100 states have call successors, (100) [2023-02-15 20:45:18,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 374 transitions. [2023-02-15 20:45:18,246 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 374 transitions. Word has length 103 [2023-02-15 20:45:18,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:45:18,247 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 374 transitions. [2023-02-15 20:45:18,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 19 states have internal predecessors, (44), 12 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 13 states have call predecessors, (32), 11 states have call successors, (32) [2023-02-15 20:45:18,247 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 374 transitions. [2023-02-15 20:45:18,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-15 20:45:18,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:45:18,249 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 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] [2023-02-15 20:45:18,257 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 20:45:18,454 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 20:45:18,455 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:45:18,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:45:18,455 INFO L85 PathProgramCache]: Analyzing trace with hash -992204181, now seen corresponding path program 4 times [2023-02-15 20:45:18,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:45:18,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84644187] [2023-02-15 20:45:18,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:45:18,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:45:18,472 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:45:18,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831526282] [2023-02-15 20:45:18,472 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:45:18,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:45:18,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:45:18,474 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 20:45:18,476 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 20:45:18,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:45:18,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:45:18,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 20:45:18,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:45:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-02-15 20:45:18,566 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 20:45:18,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:45:18,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84644187] [2023-02-15 20:45:18,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:45:18,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831526282] [2023-02-15 20:45:18,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831526282] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:45:18,567 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:45:18,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 20:45:18,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685886510] [2023-02-15 20:45:18,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:45:18,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 20:45:18,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:45:18,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 20:45:18,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 20:45:18,570 INFO L87 Difference]: Start difference. First operand 267 states and 374 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-02-15 20:45:18,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:45:18,710 INFO L93 Difference]: Finished difference Result 350 states and 488 transitions. [2023-02-15 20:45:18,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 20:45:18,710 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 106 [2023-02-15 20:45:18,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:45:18,712 INFO L225 Difference]: With dead ends: 350 [2023-02-15 20:45:18,712 INFO L226 Difference]: Without dead ends: 236 [2023-02-15 20:45:18,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 102 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 20:45:18,715 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 20:45:18,716 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 20:45:18,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2023-02-15 20:45:18,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 219. [2023-02-15 20:45:18,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 122 states have (on average 1.1311475409836065) internal successors, (138), 125 states have internal predecessors, (138), 78 states have call successors, (78), 18 states have call predecessors, (78), 18 states have return successors, (77), 75 states have call predecessors, (77), 77 states have call successors, (77) [2023-02-15 20:45:18,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 293 transitions. [2023-02-15 20:45:18,823 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 293 transitions. Word has length 106 [2023-02-15 20:45:18,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:45:18,823 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 293 transitions. [2023-02-15 20:45:18,823 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, (18), 2 states have call predecessors, (18), 2 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2023-02-15 20:45:18,823 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 293 transitions. [2023-02-15 20:45:18,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-15 20:45:18,825 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:45:18,825 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 20:45:18,830 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 20:45:19,030 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 20:45:19,030 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:45:19,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:45:19,030 INFO L85 PathProgramCache]: Analyzing trace with hash -397785577, now seen corresponding path program 2 times [2023-02-15 20:45:19,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:45:19,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484669076] [2023-02-15 20:45:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:45:19,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:45:19,038 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:45:19,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [826469862] [2023-02-15 20:45:19,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:45:19,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:45:19,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:45:19,040 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 20:45:19,044 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 20:45:19,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:45:19,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:45:19,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-15 20:45:19,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:45:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 63 proven. 56 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-02-15 20:45:19,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:45:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 63 proven. 41 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-02-15 20:45:20,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:45:20,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484669076] [2023-02-15 20:45:20,972 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:45:20,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826469862] [2023-02-15 20:45:20,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826469862] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:45:20,972 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:45:20,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2023-02-15 20:45:20,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734959120] [2023-02-15 20:45:20,972 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:45:20,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 20:45:20,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:45:20,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 20:45:20,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2023-02-15 20:45:20,974 INFO L87 Difference]: Start difference. First operand 219 states and 293 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 25 states have internal predecessors, (54), 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 20:45:33,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:45:33,106 INFO L93 Difference]: Finished difference Result 268 states and 360 transitions. [2023-02-15 20:45:33,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 20:45:33,109 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 25 states have internal predecessors, (54), 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 123 [2023-02-15 20:45:33,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:45:33,111 INFO L225 Difference]: With dead ends: 268 [2023-02-15 20:45:33,111 INFO L226 Difference]: Without dead ends: 266 [2023-02-15 20:45:33,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 216 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 20:45:33,112 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 90 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:45:33,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 247 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2023-02-15 20:45:33,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2023-02-15 20:45:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 242. [2023-02-15 20:45:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 136 states have (on average 1.125) internal successors, (153), 141 states have internal predecessors, (153), 84 states have call successors, (84), 21 states have call predecessors, (84), 21 states have return successors, (83), 79 states have call predecessors, (83), 83 states have call successors, (83) [2023-02-15 20:45:33,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 320 transitions. [2023-02-15 20:45:33,219 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 320 transitions. Word has length 123 [2023-02-15 20:45:33,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:45:33,219 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 320 transitions. [2023-02-15 20:45:33,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 25 states have internal predecessors, (54), 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 20:45:33,220 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 320 transitions. [2023-02-15 20:45:33,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-15 20:45:33,221 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:45:33,221 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 20:45:33,227 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 20:45:33,427 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 20:45:33,427 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:45:33,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:45:33,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2023-02-15 20:45:33,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:45:33,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283307005] [2023-02-15 20:45:33,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:45:33,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:45:33,436 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:45:33,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605944459] [2023-02-15 20:45:33,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:45:33,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:45:33,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:45:33,438 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 20:45:33,459 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 20:45:33,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:45:33,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:45:33,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 67 conjunts are in the unsatisfiable core [2023-02-15 20:45:33,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:45:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 38 proven. 52 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-02-15 20:45:34,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:45:35,643 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-02-15 20:45:35,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:45:35,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283307005] [2023-02-15 20:45:35,643 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:45:35,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605944459] [2023-02-15 20:45:35,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605944459] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:45:35,643 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:45:35,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-02-15 20:45:35,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516316589] [2023-02-15 20:45:35,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:45:35,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 20:45:35,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:45:35,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 20:45:35,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-02-15 20:45:35,646 INFO L87 Difference]: Start difference. First operand 242 states and 320 transitions. Second operand has 28 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 14 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) [2023-02-15 20:46:12,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:12,060 INFO L93 Difference]: Finished difference Result 368 states and 514 transitions. [2023-02-15 20:46:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 20:46:12,060 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 14 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) Word has length 134 [2023-02-15 20:46:12,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:12,062 INFO L225 Difference]: With dead ends: 368 [2023-02-15 20:46:12,062 INFO L226 Difference]: Without dead ends: 360 [2023-02-15 20:46:12,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=855, Invalid=4115, Unknown=0, NotChecked=0, Total=4970 [2023-02-15 20:46:12,064 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 205 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 1873 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 599 SdHoareTripleChecker+Invalid, 2277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 1873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:12,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 599 Invalid, 2277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 1873 Invalid, 0 Unknown, 0 Unchecked, 19.3s Time] [2023-02-15 20:46:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2023-02-15 20:46:12,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 346. [2023-02-15 20:46:12,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 185 states have (on average 1.145945945945946) internal successors, (212), 191 states have internal predecessors, (212), 136 states have call successors, (136), 24 states have call predecessors, (136), 24 states have return successors, (135), 130 states have call predecessors, (135), 135 states have call successors, (135) [2023-02-15 20:46:12,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 483 transitions. [2023-02-15 20:46:12,275 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 483 transitions. Word has length 134 [2023-02-15 20:46:12,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:12,276 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 483 transitions. [2023-02-15 20:46:12,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 14 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) [2023-02-15 20:46:12,276 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 483 transitions. [2023-02-15 20:46:12,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-15 20:46:12,279 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:12,279 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 20:46:12,286 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 20:46:12,484 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 20:46:12,485 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:12,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:12,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1798457687, now seen corresponding path program 3 times [2023-02-15 20:46:12,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:12,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388141534] [2023-02-15 20:46:12,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:12,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:12,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:12,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558799176] [2023-02-15 20:46:12,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:46:12,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:12,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:12,496 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 20:46:12,498 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 20:46:13,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 20:46:13,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:46:13,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-15 20:46:13,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:18,481 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 118 proven. 46 refuted. 0 times theorem prover too weak. 681 trivial. 0 not checked. [2023-02-15 20:46:18,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:46:22,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:22,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388141534] [2023-02-15 20:46:22,027 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:46:22,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558799176] [2023-02-15 20:46:22,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558799176] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:46:22,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:46:22,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-15 20:46:22,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453432253] [2023-02-15 20:46:22,028 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:46:22,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 20:46:22,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:22,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 20:46:22,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=527, Unknown=1, NotChecked=0, Total=650 [2023-02-15 20:46:22,029 INFO L87 Difference]: Start difference. First operand 346 states and 483 transitions. Second operand has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) [2023-02-15 20:46:24,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:24,758 INFO L93 Difference]: Finished difference Result 384 states and 532 transitions. [2023-02-15 20:46:24,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-15 20:46:24,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) Word has length 150 [2023-02-15 20:46:24,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:24,761 INFO L225 Difference]: With dead ends: 384 [2023-02-15 20:46:24,761 INFO L226 Difference]: Without dead ends: 382 [2023-02-15 20:46:24,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=186, Invalid=869, Unknown=1, NotChecked=0, Total=1056 [2023-02-15 20:46:24,762 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 38 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 863 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:24,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 208 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 863 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-15 20:46:24,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-02-15 20:46:25,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 379. [2023-02-15 20:46:25,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 203 states have (on average 1.1428571428571428) internal successors, (232), 209 states have internal predecessors, (232), 148 states have call successors, (148), 27 states have call predecessors, (148), 27 states have return successors, (147), 142 states have call predecessors, (147), 147 states have call successors, (147) [2023-02-15 20:46:25,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 527 transitions. [2023-02-15 20:46:25,059 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 527 transitions. Word has length 150 [2023-02-15 20:46:25,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:25,060 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 527 transitions. [2023-02-15 20:46:25,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 7 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (21), 8 states have call predecessors, (21), 6 states have call successors, (21) [2023-02-15 20:46:25,060 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 527 transitions. [2023-02-15 20:46:25,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-02-15 20:46:25,062 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:25,062 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 20:46:25,068 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 20:46:25,268 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 20:46:25,269 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:25,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:25,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1812352379, now seen corresponding path program 3 times [2023-02-15 20:46:25,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:25,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940769973] [2023-02-15 20:46:25,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:25,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:25,285 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:25,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1390824455] [2023-02-15 20:46:25,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:46:25,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:25,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:25,287 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 20:46:25,289 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 20:46:25,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-15 20:46:25,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:46:25,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-15 20:46:25,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:26,192 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 104 proven. 43 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2023-02-15 20:46:26,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:46:27,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:27,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940769973] [2023-02-15 20:46:27,338 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:46:27,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390824455] [2023-02-15 20:46:27,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390824455] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:46:27,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:46:27,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-15 20:46:27,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364210984] [2023-02-15 20:46:27,338 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:46:27,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 20:46:27,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:27,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 20:46:27,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=430, Unknown=1, NotChecked=0, Total=506 [2023-02-15 20:46:27,339 INFO L87 Difference]: Start difference. First operand 379 states and 527 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-15 20:46:28,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:28,250 INFO L93 Difference]: Finished difference Result 406 states and 563 transitions. [2023-02-15 20:46:28,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 20:46:28,251 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 5 states have call successors, (14) Word has length 153 [2023-02-15 20:46:28,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:28,253 INFO L225 Difference]: With dead ends: 406 [2023-02-15 20:46:28,253 INFO L226 Difference]: Without dead ends: 399 [2023-02-15 20:46:28,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=128, Invalid=683, Unknown=1, NotChecked=0, Total=812 [2023-02-15 20:46:28,254 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 36 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:28,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 122 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 20:46:28,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2023-02-15 20:46:28,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 382. [2023-02-15 20:46:28,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 204 states have (on average 1.1372549019607843) internal successors, (232), 209 states have internal predecessors, (232), 149 states have call successors, (149), 28 states have call predecessors, (149), 28 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2023-02-15 20:46:28,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 529 transitions. [2023-02-15 20:46:28,490 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 529 transitions. Word has length 153 [2023-02-15 20:46:28,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:28,490 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 529 transitions. [2023-02-15 20:46:28,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-15 20:46:28,490 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 529 transitions. [2023-02-15 20:46:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-02-15 20:46:28,492 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:28,492 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 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 20:46:28,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-15 20:46:28,698 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 20:46:28,698 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:28,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:28,699 INFO L85 PathProgramCache]: Analyzing trace with hash 2114909687, now seen corresponding path program 4 times [2023-02-15 20:46:28,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:28,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338935994] [2023-02-15 20:46:28,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:28,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:28,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:28,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1851563488] [2023-02-15 20:46:28,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:46:28,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:28,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:28,708 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 20:46:28,709 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 20:46:28,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:46:28,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:46:28,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-15 20:46:28,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:46:29,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 112 proven. 97 refuted. 0 times theorem prover too weak. 906 trivial. 0 not checked. [2023-02-15 20:46:29,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:46:31,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 108 proven. 86 refuted. 0 times theorem prover too weak. 921 trivial. 0 not checked. [2023-02-15 20:46:31,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:46:31,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338935994] [2023-02-15 20:46:31,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:46:31,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851563488] [2023-02-15 20:46:31,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851563488] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:46:31,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-15 20:46:31,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-02-15 20:46:31,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986557572] [2023-02-15 20:46:31,234 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-15 20:46:31,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 20:46:31,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:46:31,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 20:46:31,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 20:46:31,236 INFO L87 Difference]: Start difference. First operand 382 states and 529 transitions. Second operand has 33 states, 31 states have (on average 2.0) internal successors, (62), 29 states have internal predecessors, (62), 18 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (54), 18 states have call predecessors, (54), 16 states have call successors, (54) [2023-02-15 20:46:42,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:46:42,494 INFO L93 Difference]: Finished difference Result 463 states and 646 transitions. [2023-02-15 20:46:42,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 20:46:42,495 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 29 states have internal predecessors, (62), 18 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (54), 18 states have call predecessors, (54), 16 states have call successors, (54) Word has length 167 [2023-02-15 20:46:42,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:46:42,497 INFO L225 Difference]: With dead ends: 463 [2023-02-15 20:46:42,497 INFO L226 Difference]: Without dead ends: 461 [2023-02-15 20:46:42,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=653, Invalid=3129, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 20:46:42,498 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 157 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 1700 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 2013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 1700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-02-15 20:46:42,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 323 Invalid, 2013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 1700 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2023-02-15 20:46:42,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2023-02-15 20:46:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 441. [2023-02-15 20:46:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 232 states have (on average 1.146551724137931) internal successors, (266), 238 states have internal predecessors, (266), 176 states have call successors, (176), 32 states have call predecessors, (176), 32 states have return successors, (175), 170 states have call predecessors, (175), 175 states have call successors, (175) [2023-02-15 20:46:42,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 617 transitions. [2023-02-15 20:46:42,837 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 617 transitions. Word has length 167 [2023-02-15 20:46:42,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:46:42,837 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 617 transitions. [2023-02-15 20:46:42,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 29 states have internal predecessors, (62), 18 states have call successors, (55), 3 states have call predecessors, (55), 3 states have return successors, (54), 18 states have call predecessors, (54), 16 states have call successors, (54) [2023-02-15 20:46:42,838 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 617 transitions. [2023-02-15 20:46:42,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-02-15 20:46:42,839 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:46:42,840 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:46:42,851 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 20:46:43,045 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 20:46:43,046 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:46:43,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:46:43,046 INFO L85 PathProgramCache]: Analyzing trace with hash 2095255219, now seen corresponding path program 5 times [2023-02-15 20:46:43,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:46:43,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774155229] [2023-02-15 20:46:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:46:43,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:46:43,063 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-15 20:46:43,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613301426] [2023-02-15 20:46:43,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:46:43,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:46:43,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:46:43,066 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 20:46:43,070 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 20:46:53,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-15 20:46:53,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:46:53,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-15 20:46:53,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:47:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 160 proven. 292 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2023-02-15 20:47:17,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:47:19,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:47:19,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774155229] [2023-02-15 20:47:19,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-15 20:47:19,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613301426] [2023-02-15 20:47:19,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613301426] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:47:19,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-15 20:47:19,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-02-15 20:47:19,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921789623] [2023-02-15 20:47:19,810 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-15 20:47:19,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 20:47:19,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:47:19,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 20:47:19,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=445, Unknown=2, NotChecked=0, Total=506 [2023-02-15 20:47:19,812 INFO L87 Difference]: Start difference. First operand 441 states and 617 transitions. Second operand has 20 states, 18 states have (on average 2.111111111111111) internal successors, (38), 16 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 13 states have call predecessors, (29), 9 states have call successors, (29) [2023-02-15 20:47:26,554 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 20:47:29,010 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:47:39,215 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:47:43,677 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:47:50,179 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:47:52,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:47:55,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.83s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:47:56,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:47:58,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:48:00,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-15 20:48:13,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0]