./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/prodbin-ll_unwindbound10.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 a4b78cca419c4f80cf2035b24117f55573c3f70ecb874dac73db89063e2724b4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 16:40:42,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 16:40:42,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 16:40:42,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 16:40:42,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 16:40:42,845 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 16:40:42,847 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 16:40:42,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 16:40:42,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 16:40:42,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 16:40:42,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 16:40:42,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 16:40:42,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 16:40:42,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 16:40:42,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 16:40:42,868 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 16:40:42,869 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 16:40:42,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 16:40:42,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 16:40:42,880 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 16:40:42,883 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 16:40:42,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 16:40:42,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 16:40:42,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 16:40:42,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 16:40:42,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 16:40:42,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 16:40:42,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 16:40:42,895 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 16:40:42,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 16:40:42,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 16:40:42,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 16:40:42,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 16:40:42,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 16:40:42,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 16:40:42,900 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 16:40:42,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 16:40:42,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 16:40:42,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 16:40:42,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 16:40:42,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 16:40:42,905 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 16:40:42,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 16:40:42,941 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 16:40:42,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 16:40:42,942 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 16:40:42,942 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 16:40:42,943 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 16:40:42,943 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 16:40:42,943 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 16:40:42,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 16:40:42,944 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 16:40:42,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 16:40:42,945 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 16:40:42,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 16:40:42,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 16:40:42,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 16:40:42,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 16:40:42,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 16:40:42,946 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 16:40:42,946 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 16:40:42,946 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 16:40:42,947 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 16:40:42,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 16:40:42,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 16:40:42,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 16:40:42,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 16:40:42,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:40:42,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 16:40:42,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 16:40:42,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 16:40:42,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 16:40:42,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 16:40:42,950 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 16:40:42,950 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 16:40:42,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 16:40:42,950 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4b78cca419c4f80cf2035b24117f55573c3f70ecb874dac73db89063e2724b4 [2022-07-22 16:40:43,162 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 16:40:43,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 16:40:43,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 16:40:43,180 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 16:40:43,180 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 16:40:43,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2022-07-22 16:40:43,232 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97a71324e/5d6658150f3b44d1906a0f65564ff0fd/FLAG24f3562f4 [2022-07-22 16:40:43,600 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 16:40:43,600 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound10.c [2022-07-22 16:40:43,605 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97a71324e/5d6658150f3b44d1906a0f65564ff0fd/FLAG24f3562f4 [2022-07-22 16:40:43,622 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/97a71324e/5d6658150f3b44d1906a0f65564ff0fd [2022-07-22 16:40:43,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 16:40:43,626 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 16:40:43,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 16:40:43,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 16:40:43,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 16:40:43,633 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:40:43" (1/1) ... [2022-07-22 16:40:43,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e710978 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:43, skipping insertion in model container [2022-07-22 16:40:43,634 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 04:40:43" (1/1) ... [2022-07-22 16:40:43,639 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 16:40:43,652 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 16:40:43,798 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound10.c[537,550] [2022-07-22 16:40:43,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:40:43,816 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 16:40:43,826 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/prodbin-ll_unwindbound10.c[537,550] [2022-07-22 16:40:43,836 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 16:40:43,846 INFO L208 MainTranslator]: Completed translation [2022-07-22 16:40:43,847 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:43 WrapperNode [2022-07-22 16:40:43,847 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 16:40:43,848 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 16:40:43,848 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 16:40:43,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 16:40:43,855 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:43" (1/1) ... [2022-07-22 16:40:43,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:43" (1/1) ... [2022-07-22 16:40:43,877 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-07-22 16:40:43,878 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 16:40:43,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 16:40:43,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 16:40:43,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 16:40:43,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:43" (1/1) ... [2022-07-22 16:40:43,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:43" (1/1) ... [2022-07-22 16:40:43,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:43" (1/1) ... [2022-07-22 16:40:43,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:43" (1/1) ... [2022-07-22 16:40:43,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:43" (1/1) ... [2022-07-22 16:40:43,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:43" (1/1) ... [2022-07-22 16:40:43,892 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:43" (1/1) ... [2022-07-22 16:40:43,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 16:40:43,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 16:40:43,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 16:40:43,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 16:40:43,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:43" (1/1) ... [2022-07-22 16:40:43,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 16:40:43,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:43,919 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 16:40:43,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 16:40:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 16:40:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 16:40:43,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 16:40:43,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 16:40:43,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 16:40:43,953 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 16:40:43,992 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 16:40:43,993 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 16:40:44,079 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 16:40:44,084 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 16:40:44,084 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 16:40:44,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:40:44 BoogieIcfgContainer [2022-07-22 16:40:44,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 16:40:44,087 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 16:40:44,088 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 16:40:44,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 16:40:44,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 04:40:43" (1/3) ... [2022-07-22 16:40:44,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e87e9be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:40:44, skipping insertion in model container [2022-07-22 16:40:44,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 04:40:43" (2/3) ... [2022-07-22 16:40:44,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e87e9be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 04:40:44, skipping insertion in model container [2022-07-22 16:40:44,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 04:40:44" (3/3) ... [2022-07-22 16:40:44,093 INFO L111 eAbstractionObserver]: Analyzing ICFG prodbin-ll_unwindbound10.c [2022-07-22 16:40:44,105 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 16:40:44,105 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 16:40:44,143 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 16:40:44,149 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@43684ce8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@42cc5ea7 [2022-07-22 16:40:44,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 16:40:44,153 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:44,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 16:40:44,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:44,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:44,160 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:44,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:44,165 INFO L85 PathProgramCache]: Analyzing trace with hash -572597424, now seen corresponding path program 1 times [2022-07-22 16:40:44,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:44,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077785546] [2022-07-22 16:40:44,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:44,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:44,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:40:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:44,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:44,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077785546] [2022-07-22 16:40:44,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077785546] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:40:44,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:40:44,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 16:40:44,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936620451] [2022-07-22 16:40:44,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:40:44,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 16:40:44,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:44,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 16:40:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 16:40:44,349 INFO L87 Difference]: Start difference. First operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:40:44,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:44,369 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2022-07-22 16:40:44,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 16:40:44,372 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-22 16:40:44,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:44,384 INFO L225 Difference]: With dead ends: 39 [2022-07-22 16:40:44,384 INFO L226 Difference]: Without dead ends: 17 [2022-07-22 16:40:44,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 16:40:44,391 INFO L413 NwaCegarLoop]: 24 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, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:44,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:40:44,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-22 16:40:44,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-22 16:40:44,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 16:40:44,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-07-22 16:40:44,430 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 9 [2022-07-22 16:40:44,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:44,431 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-07-22 16:40:44,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:40:44,432 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-07-22 16:40:44,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 16:40:44,433 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:44,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:44,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 16:40:44,434 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:44,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:44,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1986366499, now seen corresponding path program 1 times [2022-07-22 16:40:44,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:44,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920601597] [2022-07-22 16:40:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:44,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:40:44,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:44,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:44,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920601597] [2022-07-22 16:40:44,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920601597] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:40:44,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:40:44,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 16:40:44,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846741996] [2022-07-22 16:40:44,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:40:44,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 16:40:44,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:44,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 16:40:44,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 16:40:44,568 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:40:44,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:44,596 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2022-07-22 16:40:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 16:40:44,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-22 16:40:44,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:44,598 INFO L225 Difference]: With dead ends: 26 [2022-07-22 16:40:44,598 INFO L226 Difference]: Without dead ends: 19 [2022-07-22 16:40:44,599 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 16:40:44,600 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:44,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:40:44,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-22 16:40:44,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-22 16:40:44,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 16:40:44,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-07-22 16:40:44,606 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 10 [2022-07-22 16:40:44,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:44,606 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-07-22 16:40:44,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:40:44,606 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-07-22 16:40:44,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 16:40:44,607 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:44,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:44,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 16:40:44,612 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:44,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:44,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1984579039, now seen corresponding path program 1 times [2022-07-22 16:40:44,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:44,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201995354] [2022-07-22 16:40:44,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:44,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:44,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:44,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1452412845] [2022-07-22 16:40:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:44,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:44,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:44,628 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:44,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 16:40:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:40:44,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-22 16:40:44,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:40:44,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:44,748 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:40:44,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:44,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201995354] [2022-07-22 16:40:44,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:40:44,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452412845] [2022-07-22 16:40:44,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452412845] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:40:44,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:40:44,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:40:44,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322555608] [2022-07-22 16:40:44,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:40:44,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:40:44,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:44,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:40:44,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:40:44,752 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:40:44,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:44,797 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-07-22 16:40:44,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:40:44,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-22 16:40:44,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:44,799 INFO L225 Difference]: With dead ends: 30 [2022-07-22 16:40:44,799 INFO L226 Difference]: Without dead ends: 28 [2022-07-22 16:40:44,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 16:40:44,800 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:44,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 47 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:40:44,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-22 16:40:44,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-07-22 16:40:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-22 16:40:44,806 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2022-07-22 16:40:44,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:44,807 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-22 16:40:44,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 16:40:44,807 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-22 16:40:44,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-22 16:40:44,808 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:44,808 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:44,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 16:40:45,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:45,031 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:45,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:45,032 INFO L85 PathProgramCache]: Analyzing trace with hash 845350648, now seen corresponding path program 1 times [2022-07-22 16:40:45,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:45,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136784026] [2022-07-22 16:40:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:45,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:45,044 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:45,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [818853357] [2022-07-22 16:40:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:45,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:45,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:45,050 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:45,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 16:40:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:40:45,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 16:40:45,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:40:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:45,172 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 16:40:45,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:45,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136784026] [2022-07-22 16:40:45,173 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:40:45,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818853357] [2022-07-22 16:40:45,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818853357] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 16:40:45,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 16:40:45,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 16:40:45,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721939270] [2022-07-22 16:40:45,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 16:40:45,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 16:40:45,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:45,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 16:40:45,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 16:40:45,180 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 16:40:45,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:45,266 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-07-22 16:40:45,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 16:40:45,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-07-22 16:40:45,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:45,267 INFO L225 Difference]: With dead ends: 34 [2022-07-22 16:40:45,268 INFO L226 Difference]: Without dead ends: 27 [2022-07-22 16:40:45,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-22 16:40:45,269 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 29 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:45,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 38 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:40:45,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-22 16:40:45,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-07-22 16:40:45,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:45,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-07-22 16:40:45,274 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2022-07-22 16:40:45,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:45,275 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-07-22 16:40:45,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 16:40:45,275 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-07-22 16:40:45,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 16:40:45,276 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:45,276 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:45,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 16:40:45,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 16:40:45,491 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:45,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:45,492 INFO L85 PathProgramCache]: Analyzing trace with hash 905454657, now seen corresponding path program 1 times [2022-07-22 16:40:45,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:45,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974224256] [2022-07-22 16:40:45,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:45,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:45,507 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:45,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938945691] [2022-07-22 16:40:45,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:45,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:45,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:45,552 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:45,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 16:40:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:40:45,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-22 16:40:45,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:40:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:45,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:40:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:45,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:45,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974224256] [2022-07-22 16:40:45,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:40:45,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938945691] [2022-07-22 16:40:45,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938945691] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:40:45,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:40:45,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-07-22 16:40:45,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322216125] [2022-07-22 16:40:45,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:40:45,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-22 16:40:45,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:45,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-22 16:40:45,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-07-22 16:40:45,690 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:45,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:45,765 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2022-07-22 16:40:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 16:40:45,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-22 16:40:45,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:45,767 INFO L225 Difference]: With dead ends: 62 [2022-07-22 16:40:45,767 INFO L226 Difference]: Without dead ends: 55 [2022-07-22 16:40:45,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-07-22 16:40:45,769 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:45,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 83 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 16:40:45,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-22 16:40:45,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2022-07-22 16:40:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 42 states have internal predecessors, (50), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 16:40:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2022-07-22 16:40:45,777 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 20 [2022-07-22 16:40:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:45,778 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2022-07-22 16:40:45,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:45,778 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2022-07-22 16:40:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 16:40:45,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:45,779 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:45,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 16:40:46,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:46,003 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:46,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:46,003 INFO L85 PathProgramCache]: Analyzing trace with hash 907242117, now seen corresponding path program 1 times [2022-07-22 16:40:46,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:46,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351980746] [2022-07-22 16:40:46,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:46,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:46,018 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:46,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202543781] [2022-07-22 16:40:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:46,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:46,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:46,021 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:46,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 16:40:46,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:40:46,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 16:40:46,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:40:46,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:46,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:40:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:50,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:50,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351980746] [2022-07-22 16:40:50,703 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:40:50,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202543781] [2022-07-22 16:40:50,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202543781] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:40:50,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:40:50,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-07-22 16:40:50,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647523569] [2022-07-22 16:40:50,704 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:40:50,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 16:40:50,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:50,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 16:40:50,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-07-22 16:40:50,705 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:54,673 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:40:56,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:40:56,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:40:56,753 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2022-07-22 16:40:56,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 16:40:56,754 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-22 16:40:56,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:40:56,756 INFO L225 Difference]: With dead ends: 86 [2022-07-22 16:40:56,756 INFO L226 Difference]: Without dead ends: 84 [2022-07-22 16:40:56,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2022-07-22 16:40:56,757 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-07-22 16:40:56,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 93 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-07-22 16:40:56,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-22 16:40:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-07-22 16:40:56,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 67 states have internal predecessors, (76), 10 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 16:40:56,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 93 transitions. [2022-07-22 16:40:56,771 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 93 transitions. Word has length 20 [2022-07-22 16:40:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:40:56,771 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 93 transitions. [2022-07-22 16:40:56,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:40:56,772 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 93 transitions. [2022-07-22 16:40:56,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 16:40:56,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:40:56,773 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:40:56,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 16:40:56,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:56,991 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:40:56,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:40:56,992 INFO L85 PathProgramCache]: Analyzing trace with hash 97895491, now seen corresponding path program 1 times [2022-07-22 16:40:56,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:40:56,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523677938] [2022-07-22 16:40:56,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:56,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:40:57,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:40:57,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934292488] [2022-07-22 16:40:57,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:40:57,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:40:57,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:40:57,006 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:40:57,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 16:40:57,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:40:57,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 16:40:57,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:40:57,930 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:57,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:40:58,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:40:58,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:40:58,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523677938] [2022-07-22 16:40:58,926 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:40:58,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934292488] [2022-07-22 16:40:58,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934292488] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:40:58,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:40:58,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-07-22 16:40:58,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466711782] [2022-07-22 16:40:58,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:40:58,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 16:40:58,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:40:58,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 16:40:58,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-07-22 16:40:58,928 INFO L87 Difference]: Start difference. First operand 80 states and 93 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:41:00,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:41:00,035 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2022-07-22 16:41:00,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 16:41:00,036 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-22 16:41:00,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:41:00,037 INFO L225 Difference]: With dead ends: 115 [2022-07-22 16:41:00,037 INFO L226 Difference]: Without dead ends: 104 [2022-07-22 16:41:00,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=174, Invalid=582, Unknown=0, NotChecked=0, Total=756 [2022-07-22 16:41:00,039 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 16:41:00,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 69 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 16:41:00,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-22 16:41:00,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2022-07-22 16:41:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 66 states have (on average 1.196969696969697) internal successors, (79), 68 states have internal predecessors, (79), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 16:41:00,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2022-07-22 16:41:00,056 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 20 [2022-07-22 16:41:00,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:41:00,057 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2022-07-22 16:41:00,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 16:41:00,057 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2022-07-22 16:41:00,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 16:41:00,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:41:00,058 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:41:00,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 16:41:00,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:00,259 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:41:00,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:41:00,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1470880860, now seen corresponding path program 1 times [2022-07-22 16:41:00,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:41:00,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408733873] [2022-07-22 16:41:00,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:00,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:41:00,271 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:41:00,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473474171] [2022-07-22 16:41:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:00,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:00,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:41:00,273 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:41:00,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 16:41:00,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:00,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 16:41:00,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:41:00,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 16:41:00,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:41:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 16:41:00,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:41:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408733873] [2022-07-22 16:41:00,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:41:00,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473474171] [2022-07-22 16:41:00,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473474171] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:41:00,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:41:00,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-07-22 16:41:00,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797141604] [2022-07-22 16:41:00,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:41:00,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 16:41:00,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:41:00,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 16:41:00,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-07-22 16:41:00,455 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 16:41:02,459 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:41:02,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:41:02,550 INFO L93 Difference]: Finished difference Result 92 states and 103 transitions. [2022-07-22 16:41:02,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-22 16:41:02,550 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 26 [2022-07-22 16:41:02,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:41:02,551 INFO L225 Difference]: With dead ends: 92 [2022-07-22 16:41:02,551 INFO L226 Difference]: Without dead ends: 82 [2022-07-22 16:41:02,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-07-22 16:41:02,552 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:41:02,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 55 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 1 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 16:41:02,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-22 16:41:02,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2022-07-22 16:41:02,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.140625) internal successors, (73), 66 states have internal predecessors, (73), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 16:41:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2022-07-22 16:41:02,562 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 26 [2022-07-22 16:41:02,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:41:02,562 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2022-07-22 16:41:02,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-22 16:41:02,562 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2022-07-22 16:41:02,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 16:41:02,563 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:41:02,563 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:41:02,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 16:41:02,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:02,784 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:41:02,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:41:02,784 INFO L85 PathProgramCache]: Analyzing trace with hash -158147061, now seen corresponding path program 1 times [2022-07-22 16:41:02,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:41:02,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253655390] [2022-07-22 16:41:02,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:02,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:41:02,795 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:41:02,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833889584] [2022-07-22 16:41:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:41:02,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:41:02,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:41:02,799 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:41:02,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 16:41:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 16:41:02,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 16:41:02,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:41:22,658 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:41:22,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:41:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 29 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-22 16:41:32,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:41:32,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253655390] [2022-07-22 16:41:32,824 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:41:32,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833889584] [2022-07-22 16:41:32,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833889584] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:41:32,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:41:32,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 22 [2022-07-22 16:41:32,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349499264] [2022-07-22 16:41:32,824 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:41:32,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 16:41:32,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:41:32,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 16:41:32,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=376, Unknown=2, NotChecked=0, Total=462 [2022-07-22 16:41:32,826 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-22 16:41:34,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:41:36,111 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:41:45,553 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:41:58,428 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:41:59,651 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:42:03,826 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:42:04,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:42:04,152 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2022-07-22 16:42:04,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 16:42:04,153 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 40 [2022-07-22 16:42:04,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:42:04,154 INFO L225 Difference]: With dead ends: 119 [2022-07-22 16:42:04,154 INFO L226 Difference]: Without dead ends: 117 [2022-07-22 16:42:04,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 31.5s TimeCoverageRelationStatistics Valid=172, Invalid=755, Unknown=3, NotChecked=0, Total=930 [2022-07-22 16:42:04,156 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 51 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 33 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-07-22 16:42:04,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 165 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 338 Invalid, 2 Unknown, 27 Unchecked, 11.7s Time] [2022-07-22 16:42:04,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-22 16:42:04,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2022-07-22 16:42:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 91 states have (on average 1.1538461538461537) internal successors, (105), 95 states have internal predecessors, (105), 13 states have call successors, (13), 9 states have call predecessors, (13), 9 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-22 16:42:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 130 transitions. [2022-07-22 16:42:04,172 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 130 transitions. Word has length 40 [2022-07-22 16:42:04,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:42:04,172 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 130 transitions. [2022-07-22 16:42:04,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 20 states have internal predecessors, (47), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-22 16:42:04,173 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 130 transitions. [2022-07-22 16:42:04,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 16:42:04,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:42:04,175 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:42:04,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-22 16:42:04,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:04,395 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:42:04,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:42:04,396 INFO L85 PathProgramCache]: Analyzing trace with hash -957536403, now seen corresponding path program 2 times [2022-07-22 16:42:04,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:42:04,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739062248] [2022-07-22 16:42:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:42:04,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:42:04,405 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:42:04,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133648441] [2022-07-22 16:42:04,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:42:04,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:04,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:42:04,410 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:42:04,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 16:42:04,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:42:04,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:42:04,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-22 16:42:04,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:42:04,527 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 16:42:04,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:42:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 8 proven. 44 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 16:42:04,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:42:04,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739062248] [2022-07-22 16:42:04,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:42:04,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133648441] [2022-07-22 16:42:04,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133648441] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:42:04,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:42:04,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-07-22 16:42:04,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079355667] [2022-07-22 16:42:04,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:42:04,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 16:42:04,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:42:04,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 16:42:04,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-22 16:42:04,634 INFO L87 Difference]: Start difference. First operand 114 states and 130 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 16:42:04,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:42:04,787 INFO L93 Difference]: Finished difference Result 294 states and 339 transitions. [2022-07-22 16:42:04,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 16:42:04,788 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 50 [2022-07-22 16:42:04,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:42:04,790 INFO L225 Difference]: With dead ends: 294 [2022-07-22 16:42:04,790 INFO L226 Difference]: Without dead ends: 287 [2022-07-22 16:42:04,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-07-22 16:42:04,791 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 107 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 16:42:04,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 170 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 16:42:04,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-07-22 16:42:04,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 277. [2022-07-22 16:42:04,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 220 states have (on average 1.1363636363636365) internal successors, (250), 229 states have internal predecessors, (250), 30 states have call successors, (30), 26 states have call predecessors, (30), 26 states have return successors, (29), 21 states have call predecessors, (29), 29 states have call successors, (29) [2022-07-22 16:42:04,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 309 transitions. [2022-07-22 16:42:04,852 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 309 transitions. Word has length 50 [2022-07-22 16:42:04,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:42:04,853 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 309 transitions. [2022-07-22 16:42:04,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 16:42:04,854 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 309 transitions. [2022-07-22 16:42:04,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 16:42:04,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:42:04,856 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:42:04,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 16:42:05,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 16:42:05,076 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:42:05,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:42:05,076 INFO L85 PathProgramCache]: Analyzing trace with hash 26253931, now seen corresponding path program 2 times [2022-07-22 16:42:05,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:42:05,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384649518] [2022-07-22 16:42:05,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:42:05,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:42:05,083 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:42:05,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1821684028] [2022-07-22 16:42:05,084 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:42:05,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:05,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:42:05,087 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 16:42:05,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 16:42:05,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:42:05,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:42:05,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-22 16:42:05,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:42:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 16:42:20,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:42:35,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:42:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384649518] [2022-07-22 16:42:35,721 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:42:35,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821684028] [2022-07-22 16:42:35,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821684028] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 16:42:35,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-07-22 16:42:35,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-07-22 16:42:35,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743618475] [2022-07-22 16:42:35,722 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-07-22 16:42:35,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 16:42:35,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:42:35,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 16:42:35,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=527, Unknown=6, NotChecked=0, Total=650 [2022-07-22 16:42:35,723 INFO L87 Difference]: Start difference. First operand 277 states and 309 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 16:42:38,817 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:42:53,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:42:53,707 INFO L93 Difference]: Finished difference Result 391 states and 454 transitions. [2022-07-22 16:42:53,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 16:42:53,708 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 50 [2022-07-22 16:42:53,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:42:53,711 INFO L225 Difference]: With dead ends: 391 [2022-07-22 16:42:53,711 INFO L226 Difference]: Without dead ends: 389 [2022-07-22 16:42:53,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 34.9s TimeCoverageRelationStatistics Valid=260, Invalid=1292, Unknown=8, NotChecked=0, Total=1560 [2022-07-22 16:42:53,713 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-07-22 16:42:53,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 184 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 320 Invalid, 1 Unknown, 50 Unchecked, 4.9s Time] [2022-07-22 16:42:53,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-07-22 16:42:53,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 301. [2022-07-22 16:42:53,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 239 states have (on average 1.1338912133891212) internal successors, (271), 249 states have internal predecessors, (271), 33 states have call successors, (33), 28 states have call predecessors, (33), 28 states have return successors, (32), 23 states have call predecessors, (32), 32 states have call successors, (32) [2022-07-22 16:42:53,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 336 transitions. [2022-07-22 16:42:53,738 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 336 transitions. Word has length 50 [2022-07-22 16:42:53,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:42:53,739 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 336 transitions. [2022-07-22 16:42:53,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 16:42:53,739 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 336 transitions. [2022-07-22 16:42:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 16:42:53,741 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:42:53,741 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 16:42:53,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 16:42:53,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:53,956 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:42:53,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:42:53,956 INFO L85 PathProgramCache]: Analyzing trace with hash -493632277, now seen corresponding path program 3 times [2022-07-22 16:42:53,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:42:53,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538155939] [2022-07-22 16:42:53,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:42:53,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:42:53,964 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:42:53,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997108556] [2022-07-22 16:42:53,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 16:42:53,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:53,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:42:53,966 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) [2022-07-22 16:42:53,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 16:42:54,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 16:42:54,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:42:54,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 16:42:54,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:42:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-22 16:42:55,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:42:56,038 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 16:42:56,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:42:56,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538155939] [2022-07-22 16:42:56,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:42:56,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997108556] [2022-07-22 16:42:56,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997108556] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:42:56,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:42:56,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-07-22 16:42:56,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370528175] [2022-07-22 16:42:56,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:42:56,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 16:42:56,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:42:56,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 16:42:56,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-07-22 16:42:56,041 INFO L87 Difference]: Start difference. First operand 301 states and 336 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-22 16:42:57,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 16:42:57,007 INFO L93 Difference]: Finished difference Result 379 states and 427 transitions. [2022-07-22 16:42:57,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-22 16:42:57,008 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 50 [2022-07-22 16:42:57,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 16:42:57,010 INFO L225 Difference]: With dead ends: 379 [2022-07-22 16:42:57,010 INFO L226 Difference]: Without dead ends: 377 [2022-07-22 16:42:57,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2022-07-22 16:42:57,011 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 29 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 16:42:57,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 122 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-22 16:42:57,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-07-22 16:42:57,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 202. [2022-07-22 16:42:57,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 162 states have (on average 1.1666666666666667) internal successors, (189), 163 states have internal predecessors, (189), 20 states have call successors, (20), 19 states have call predecessors, (20), 19 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-22 16:42:57,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 228 transitions. [2022-07-22 16:42:57,032 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 228 transitions. Word has length 50 [2022-07-22 16:42:57,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 16:42:57,032 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 228 transitions. [2022-07-22 16:42:57,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-22 16:42:57,033 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 228 transitions. [2022-07-22 16:42:57,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 16:42:57,033 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 16:42:57,034 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-07-22 16:42:57,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 16:42:57,239 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,SelfDestructingSolverStorable11 [2022-07-22 16:42:57,240 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 16:42:57,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 16:42:57,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1003105367, now seen corresponding path program 2 times [2022-07-22 16:42:57,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 16:42:57,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042626855] [2022-07-22 16:42:57,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 16:42:57,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 16:42:57,250 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-22 16:42:57,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614461604] [2022-07-22 16:42:57,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 16:42:57,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 16:42:57,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 16:42:57,252 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) [2022-07-22 16:42:57,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 16:42:57,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 16:42:57,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 16:42:57,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 16:42:57,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 16:43:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 13 proven. 52 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 16:43:03,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 16:43:54,732 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (= (mod |c_ULTIMATE.start_main_~b~0#1| 2) 0)) (.cse8 (div |c_ULTIMATE.start_main_~b~0#1| 2))) (and (or (not .cse0) (let ((.cse4 (not (= (mod .cse8 2) 0)))) (and (or (forall ((|ULTIMATE.start_main_~a~0#1| Int)) (let ((.cse2 (div (* |ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) 2)) (.cse3 (* 2 |ULTIMATE.start_main_~a~0#1|))) (let ((.cse1 (div .cse2 .cse3))) (or (= (mod (div .cse1 2) 2) 0) (not (= (mod .cse2 .cse3) 0)) (= 0 .cse3) (<= 0 .cse1))))) .cse4) (or .cse4 (forall ((|ULTIMATE.start_main_~a~0#1| Int)) (let ((.cse6 (div (* |ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) 2)) (.cse7 (* 2 |ULTIMATE.start_main_~a~0#1|))) (let ((.cse5 (div .cse6 .cse7))) (or (= (mod .cse5 2) 0) (not (= (mod .cse6 .cse7) 0)) (= 0 .cse7) (<= 0 .cse5))))))))) (or .cse0 (let ((.cse13 (not (= (mod (+ .cse8 1) 2) 0)))) (and (or (forall ((|ULTIMATE.start_main_~a~0#1| Int)) (let ((.cse10 (* |ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse11 (div .cse10 2)) (.cse12 (* 2 |ULTIMATE.start_main_~a~0#1|))) (let ((.cse9 (div .cse11 .cse12))) (or (= (mod .cse9 2) 0) (not (= (mod .cse10 2) 0)) (not (= (mod .cse11 .cse12) 0)) (= 0 .cse12) (<= 0 .cse9)))))) .cse13) (or .cse13 (forall ((|ULTIMATE.start_main_~a~0#1| Int)) (let ((.cse15 (* |ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse16 (div .cse15 2)) (.cse17 (* 2 |ULTIMATE.start_main_~a~0#1|))) (let ((.cse14 (div .cse16 .cse17))) (or (= (mod (div .cse14 2) 2) 0) (not (= (mod .cse15 2) 0)) (not (= (mod .cse16 .cse17) 0)) (= 0 .cse17) (<= 0 .cse14)))))))))))) is different from true [2022-07-22 16:44:29,256 WARN L855 $PredicateComparison]: unable to prove that (or (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 0) (let ((.cse0 (= (mod |c_ULTIMATE.start_main_~b~0#1| 2) 0)) (.cse8 (div |c_ULTIMATE.start_main_~b~0#1| 2))) (and (or (not .cse0) (let ((.cse4 (not (= (mod .cse8 2) 0)))) (and (or (forall ((|ULTIMATE.start_main_~a~0#1| Int)) (let ((.cse2 (div (* |ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) 2)) (.cse3 (* 2 |ULTIMATE.start_main_~a~0#1|))) (let ((.cse1 (div .cse2 .cse3))) (or (= (mod (div .cse1 2) 2) 0) (not (= (mod .cse2 .cse3) 0)) (= 0 .cse3) (<= 0 .cse1))))) .cse4) (or .cse4 (forall ((|ULTIMATE.start_main_~a~0#1| Int)) (let ((.cse6 (div (* |ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) 2)) (.cse7 (* 2 |ULTIMATE.start_main_~a~0#1|))) (let ((.cse5 (div .cse6 .cse7))) (or (= (mod .cse5 2) 0) (not (= (mod .cse6 .cse7) 0)) (= 0 .cse7) (<= 0 .cse5))))))))) (or .cse0 (let ((.cse13 (not (= (mod (+ .cse8 1) 2) 0)))) (and (or (forall ((|ULTIMATE.start_main_~a~0#1| Int)) (let ((.cse10 (* |ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse11 (div .cse10 2)) (.cse12 (* 2 |ULTIMATE.start_main_~a~0#1|))) (let ((.cse9 (div .cse11 .cse12))) (or (= (mod .cse9 2) 0) (not (= (mod .cse10 2) 0)) (not (= (mod .cse11 .cse12) 0)) (= 0 .cse12) (<= 0 .cse9)))))) .cse13) (or .cse13 (forall ((|ULTIMATE.start_main_~a~0#1| Int)) (let ((.cse15 (* |ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse16 (div .cse15 2)) (.cse17 (* 2 |ULTIMATE.start_main_~a~0#1|))) (let ((.cse14 (div .cse16 .cse17))) (or (= (mod (div .cse14 2) 2) 0) (not (= (mod .cse15 2) 0)) (not (= (mod .cse16 .cse17) 0)) (= 0 .cse17) (<= 0 .cse14))))))))))))) is different from true [2022-07-22 16:44:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 13 proven. 46 refuted. 6 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 16:44:29,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 16:44:29,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042626855] [2022-07-22 16:44:29,315 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-22 16:44:29,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614461604] [2022-07-22 16:44:29,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614461604] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 16:44:29,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 16:44:29,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2022-07-22 16:44:29,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842632915] [2022-07-22 16:44:29,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 16:44:29,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 16:44:29,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 16:44:29,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 16:44:29,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=519, Unknown=3, NotChecked=98, Total=756 [2022-07-22 16:44:29,317 INFO L87 Difference]: Start difference. First operand 202 states and 228 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 16:44:31,407 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 0))) (and (or .cse0 (let ((.cse1 (= (mod |c_ULTIMATE.start_main_~b~0#1| 2) 0)) (.cse9 (div |c_ULTIMATE.start_main_~b~0#1| 2))) (and (or (not .cse1) (let ((.cse5 (not (= (mod .cse9 2) 0)))) (and (or (forall ((|ULTIMATE.start_main_~a~0#1| Int)) (let ((.cse3 (div (* |ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) 2)) (.cse4 (* 2 |ULTIMATE.start_main_~a~0#1|))) (let ((.cse2 (div .cse3 .cse4))) (or (= (mod (div .cse2 2) 2) 0) (not (= (mod .cse3 .cse4) 0)) (= 0 .cse4) (<= 0 .cse2))))) .cse5) (or .cse5 (forall ((|ULTIMATE.start_main_~a~0#1| Int)) (let ((.cse7 (div (* |ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|) 2)) (.cse8 (* 2 |ULTIMATE.start_main_~a~0#1|))) (let ((.cse6 (div .cse7 .cse8))) (or (= (mod .cse6 2) 0) (not (= (mod .cse7 .cse8) 0)) (= 0 .cse8) (<= 0 .cse6))))))))) (or .cse1 (let ((.cse14 (not (= (mod (+ .cse9 1) 2) 0)))) (and (or (forall ((|ULTIMATE.start_main_~a~0#1| Int)) (let ((.cse11 (* |ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse12 (div .cse11 2)) (.cse13 (* 2 |ULTIMATE.start_main_~a~0#1|))) (let ((.cse10 (div .cse12 .cse13))) (or (= (mod .cse10 2) 0) (not (= (mod .cse11 2) 0)) (not (= (mod .cse12 .cse13) 0)) (= 0 .cse13) (<= 0 .cse10)))))) .cse14) (or .cse14 (forall ((|ULTIMATE.start_main_~a~0#1| Int)) (let ((.cse16 (* |ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|))) (let ((.cse17 (div .cse16 2)) (.cse18 (* 2 |ULTIMATE.start_main_~a~0#1|))) (let ((.cse15 (div .cse17 .cse18))) (or (= (mod (div .cse15 2) 2) 0) (not (= (mod .cse16 2) 0)) (not (= (mod .cse17 .cse18) 0)) (= 0 .cse18) (<= 0 .cse15))))))))))))) (let ((.cse19 (<= 1 |c_ULTIMATE.start_main_~b~0#1|))) (or (and (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 1) .cse19) (and (not .cse19) .cse0))))) is different from true [2022-07-22 16:44:34,163 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse6 (div |c_ULTIMATE.start_main_~y~0#1| 2))) (let ((.cse1 (= (mod |c_ULTIMATE.start_main_~y~0#1| 2) 0)) (.cse19 (mod .cse6 2)) (.cse2 (+ .cse6 1))) (let ((.cse0 (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (.cse10 (div .cse2 2)) (.cse8 (= (mod .cse2 2) 0)) (.cse14 (= .cse19 0)) (.cse15 (div .cse6 2)) (.cse22 (< |c_ULTIMATE.start_main_~y~0#1| 0)) (.cse12 (not .cse1))) (let ((.cse3 (* |c_ULTIMATE.start_main_~x~0#1| 2)) (.cse5 (and .cse22 .cse12)) (.cse13 (+ .cse15 1)) (.cse16 (not .cse14)) (.cse11 (not .cse8)) (.cse9 (+ .cse10 1)) (.cse20 (* |c_ULTIMATE.start_main_~x~0#1| 4)) (.cse4 (not .cse22)) (.cse17 (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| .cse0) 2) 0))) (.cse18 (div (+ (* (- 1) |c_ULTIMATE.start_main_~z~0#1|) .cse0) 2))) (and (= .cse0 (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1|) |c_ULTIMATE.start_main_~z~0#1|)) (or .cse1 (= .cse0 (+ |c_ULTIMATE.start_main_~z~0#1| (* .cse2 .cse3))) .cse4) (or .cse5 (= (+ (* .cse3 .cse6) |c_ULTIMATE.start_main_~z~0#1|) .cse0)) (let ((.cse7 (div .cse18 .cse3))) (or (and (= (mod (div .cse7 2) 2) 0) (= (mod .cse7 2) 0)) (= .cse3 0) (and (or .cse1 (and (or .cse8 (not (= .cse7 .cse9))) (or (not (= .cse10 .cse7)) .cse11))) (or .cse12 (and (or (not (= .cse7 .cse13)) .cse14) (or (not (= .cse7 .cse15)) .cse16)))) .cse17 (<= 0 .cse7) (not (= (mod .cse18 .cse3) 0)))) (<= 1 |c_ULTIMATE.start_main_~b~0#1|) (or .cse5 (and (= .cse19 1) (<= 0 .cse6)) (and (or (= .cse0 (+ (* .cse13 .cse20) |c_ULTIMATE.start_main_~z~0#1|)) .cse14) (or .cse16 (= (+ |c_ULTIMATE.start_main_~z~0#1| (* .cse15 .cse20)) .cse0)))) (or .cse1 (and (or (= .cse0 (+ |c_ULTIMATE.start_main_~z~0#1| (* .cse10 .cse20))) .cse11) (or (= (+ (* .cse9 .cse20) |c_ULTIMATE.start_main_~z~0#1|) .cse0) .cse8)) .cse4) (let ((.cse21 (div .cse18 |c_ULTIMATE.start_main_~x~0#1|))) (or (and (or .cse12 (not (= .cse21 .cse6))) (or (not (= .cse2 .cse21)) .cse1)) (and (= (mod (div .cse21 2) 2) 0) (= (mod .cse21 2) 0)) .cse17 (not (= (mod .cse18 |c_ULTIMATE.start_main_~x~0#1|) 0)) (= |c_ULTIMATE.start_main_~x~0#1| 0) (<= 0 .cse21)))))))) is different from true [2022-07-22 16:44:57,225 WARN L233 SmtUtils]: Spent 22.00s on a formula simplification. DAG size of input: 79 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 16:45:03,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-07-22 16:45:06,548 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse6 (div |c_ULTIMATE.start_main_~y~0#1| 2))) (let ((.cse1 (= (mod |c_ULTIMATE.start_main_~y~0#1| 2) 0)) (.cse19 (mod .cse6 2)) (.cse2 (+ .cse6 1))) (let ((.cse0 (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (.cse10 (div .cse2 2)) (.cse8 (= (mod .cse2 2) 0)) (.cse14 (= .cse19 0)) (.cse15 (div .cse6 2)) (.cse22 (< |c_ULTIMATE.start_main_~y~0#1| 0)) (.cse12 (not .cse1))) (let ((.cse3 (* |c_ULTIMATE.start_main_~x~0#1| 2)) (.cse5 (and .cse22 .cse12)) (.cse13 (+ .cse15 1)) (.cse16 (not .cse14)) (.cse11 (not .cse8)) (.cse9 (+ .cse10 1)) (.cse20 (* |c_ULTIMATE.start_main_~x~0#1| 4)) (.cse4 (not .cse22)) (.cse17 (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| .cse0) 2) 0))) (.cse18 (div (+ (* (- 1) |c_ULTIMATE.start_main_~z~0#1|) .cse0) 2))) (and (= .cse0 (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1|) |c_ULTIMATE.start_main_~z~0#1|)) (or .cse1 (= .cse0 (+ |c_ULTIMATE.start_main_~z~0#1| (* .cse2 .cse3))) .cse4) (or .cse5 (= (+ (* .cse3 .cse6) |c_ULTIMATE.start_main_~z~0#1|) .cse0)) (let ((.cse7 (div .cse18 .cse3))) (or (and (= (mod (div .cse7 2) 2) 0) (= (mod .cse7 2) 0)) (= .cse3 0) (and (or .cse1 (and (or .cse8 (not (= .cse7 .cse9))) (or (not (= .cse10 .cse7)) .cse11))) (or .cse12 (and (or (not (= .cse7 .cse13)) .cse14) (or (not (= .cse7 .cse15)) .cse16)))) .cse17 (<= 0 .cse7) (not (= (mod .cse18 .cse3) 0)))) (or .cse5 (and (= .cse19 1) (<= 0 .cse6)) (and (or (= .cse0 (+ (* .cse13 .cse20) |c_ULTIMATE.start_main_~z~0#1|)) .cse14) (or .cse16 (= (+ |c_ULTIMATE.start_main_~z~0#1| (* .cse15 .cse20)) .cse0)))) (or .cse1 (and (or (= .cse0 (+ |c_ULTIMATE.start_main_~z~0#1| (* .cse10 .cse20))) .cse11) (or (= (+ (* .cse9 .cse20) |c_ULTIMATE.start_main_~z~0#1|) .cse0) .cse8)) .cse4) (let ((.cse21 (div .cse18 |c_ULTIMATE.start_main_~x~0#1|))) (or (and (or .cse12 (not (= .cse21 .cse6))) (or (not (= .cse2 .cse21)) .cse1)) (and (= (mod (div .cse21 2) 2) 0) (= (mod .cse21 2) 0)) .cse17 (not (= (mod .cse18 |c_ULTIMATE.start_main_~x~0#1|) 0)) (= |c_ULTIMATE.start_main_~x~0#1| 0) (<= 0 .cse21)))))))) is different from true [2022-07-22 16:45:09,168 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (= (mod |c_ULTIMATE.start_main_~y~0#1| 2) 0))) (let ((.cse6 (div |c_ULTIMATE.start_main_~y~0#1| 2)) (.cse16 (< |c_ULTIMATE.start_main_~y~0#1| 0)) (.cse13 (not .cse1))) (let ((.cse3 (* |c_ULTIMATE.start_main_~x~0#1| 2)) (.cse5 (and .cse16 .cse13)) (.cse9 (* |c_ULTIMATE.start_main_~x~0#1| 4)) (.cse4 (not .cse16)) (.cse2 (+ .cse6 1)) (.cse0 (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|))) (and (= .cse0 (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1|) |c_ULTIMATE.start_main_~z~0#1|)) (or .cse1 (= .cse0 (+ |c_ULTIMATE.start_main_~z~0#1| (* .cse2 .cse3))) .cse4) (or .cse5 (= (+ (* .cse3 .cse6) |c_ULTIMATE.start_main_~z~0#1|) .cse0)) (let ((.cse7 (mod .cse6 2))) (or .cse5 (and (= .cse7 1) (<= 0 .cse6)) (let ((.cse10 (= .cse7 0)) (.cse8 (div .cse6 2))) (and (or (= .cse0 (+ (* (+ .cse8 1) .cse9) |c_ULTIMATE.start_main_~z~0#1|)) .cse10) (or (not .cse10) (= (+ |c_ULTIMATE.start_main_~z~0#1| (* .cse8 .cse9)) .cse0)))))) (or .cse1 (let ((.cse11 (div .cse2 2)) (.cse12 (= (mod .cse2 2) 0))) (and (or (= .cse0 (+ |c_ULTIMATE.start_main_~z~0#1| (* .cse11 .cse9))) (not .cse12)) (or (= (+ (* (+ .cse11 1) .cse9) |c_ULTIMATE.start_main_~z~0#1|) .cse0) .cse12))) .cse4) (let ((.cse15 (div (+ (* (- 1) |c_ULTIMATE.start_main_~z~0#1|) .cse0) 2))) (let ((.cse14 (div .cse15 |c_ULTIMATE.start_main_~x~0#1|))) (or (and (or .cse13 (not (= .cse14 .cse6))) (or (not (= .cse2 .cse14)) .cse1)) (and (= (mod (div .cse14 2) 2) 0) (= (mod .cse14 2) 0)) (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| .cse0) 2) 0)) (not (= (mod .cse15 |c_ULTIMATE.start_main_~x~0#1|) 0)) (= |c_ULTIMATE.start_main_~x~0#1| 0) (<= 0 .cse14)))))))) is different from false [2022-07-22 16:45:14,540 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse16 (div |c_ULTIMATE.start_main_~y~0#1| 2))) (let ((.cse15 (mod .cse16 2)) (.cse19 (+ .cse16 1)) (.cse21 (mod |c_ULTIMATE.start_main_~y~0#1| 2))) (let ((.cse0 (* |c_ULTIMATE.start_main_~a~0#1| |c_ULTIMATE.start_main_~b~0#1|)) (.cse3 (= .cse21 0)) (.cse6 (div .cse19 2)) (.cse4 (= (mod .cse19 2) 0)) (.cse10 (= .cse15 0)) (.cse11 (div .cse16 2))) (let ((.cse9 (+ .cse11 1)) (.cse12 (not .cse10)) (.cse7 (not .cse4)) (.cse5 (+ .cse6 1)) (.cse2 (* |c_ULTIMATE.start_main_~x~0#1| 2)) (.cse18 (and (= .cse21 1) (<= 0 |c_ULTIMATE.start_main_~y~0#1|))) (.cse8 (not .cse3)) (.cse13 (not (= (mod (+ |c_ULTIMATE.start_main_~z~0#1| .cse0) 2) 0))) (.cse14 (div (+ (* (- 1) |c_ULTIMATE.start_main_~z~0#1|) .cse0) 2))) (and (= .cse0 (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~x~0#1|) |c_ULTIMATE.start_main_~z~0#1|)) (let ((.cse1 (div .cse14 .cse2))) (or (and (= (mod (div .cse1 2) 2) 0) (= (mod .cse1 2) 0)) (= .cse2 0) (and (or .cse3 (and (or .cse4 (not (= .cse1 .cse5))) (or (not (= .cse6 .cse1)) .cse7))) (or .cse8 (and (or (not (= .cse1 .cse9)) .cse10) (or (not (= .cse1 .cse11)) .cse12)))) .cse13 (<= 0 .cse1) (not (= (mod .cse14 .cse2) 0)))) (<= 1 |c_ULTIMATE.start_main_~b~0#1|) (or (let ((.cse17 (* |c_ULTIMATE.start_main_~x~0#1| 4))) (and (or .cse8 (and (= .cse15 1) (<= 0 .cse16)) (and (or (= .cse0 (+ (* .cse9 .cse17) |c_ULTIMATE.start_main_~z~0#1|)) .cse10) (or .cse12 (= (+ |c_ULTIMATE.start_main_~z~0#1| (* .cse11 .cse17)) .cse0)))) (or .cse3 (and (or (= .cse0 (+ |c_ULTIMATE.start_main_~z~0#1| (* .cse6 .cse17))) .cse7) (or (= (+ (* .cse5 .cse17) |c_ULTIMATE.start_main_~z~0#1|) .cse0) .cse4))))) .cse18) (or (and (or .cse3 (= .cse0 (+ |c_ULTIMATE.start_main_~z~0#1| (* .cse19 .cse2)))) (or .cse8 (= (+ (* .cse2 .cse16) |c_ULTIMATE.start_main_~z~0#1|) .cse0))) .cse18) (let ((.cse20 (div .cse14 |c_ULTIMATE.start_main_~x~0#1|))) (or (and (or .cse8 (not (= .cse20 .cse16))) (or (not (= .cse19 .cse20)) .cse3)) (and (= (mod (div .cse20 2) 2) 0) (= (mod .cse20 2) 0)) .cse13 (not (= (mod .cse14 |c_ULTIMATE.start_main_~x~0#1|) 0)) (= |c_ULTIMATE.start_main_~x~0#1| 0) (<= 0 .cse20)))))))) is different from true