./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s42if.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s42if.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8 --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 7a409beec5345d23de858b9cfc2d898f0f9067f3e0e10973225e4b6022343f4a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 18:38:21,876 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 18:38:21,878 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 18:38:21,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 18:38:21,890 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 18:38:21,891 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 18:38:21,892 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 18:38:21,893 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 18:38:21,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 18:38:21,895 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 18:38:21,895 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 18:38:21,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 18:38:21,896 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 18:38:21,897 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 18:38:21,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 18:38:21,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 18:38:21,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 18:38:21,900 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 18:38:21,901 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 18:38:21,902 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 18:38:21,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 18:38:21,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 18:38:21,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 18:38:21,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 18:38:21,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 18:38:21,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 18:38:21,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 18:38:21,908 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 18:38:21,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 18:38:21,909 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 18:38:21,909 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 18:38:21,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 18:38:21,910 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 18:38:21,911 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 18:38:21,912 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 18:38:21,912 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 18:38:21,912 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 18:38:21,912 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 18:38:21,912 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 18:38:21,913 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 18:38:21,914 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 18:38:21,914 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 18:38:21,929 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 18:38:21,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 18:38:21,929 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 18:38:21,929 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 18:38:21,930 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 18:38:21,930 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 18:38:21,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 18:38:21,931 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 18:38:21,931 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 18:38:21,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 18:38:21,931 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 18:38:21,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 18:38:21,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 18:38:21,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 18:38:21,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 18:38:21,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 18:38:21,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 18:38:21,932 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 18:38:21,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 18:38:21,932 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 18:38:21,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 18:38:21,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 18:38:21,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 18:38:21,933 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 18:38:21,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:38:21,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 18:38:21,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 18:38:21,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 18:38:21,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 18:38:21,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 18:38:21,934 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 18:38:21,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 18:38:21,934 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 18:38:21,934 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 18:38:21,934 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 18:38:21,934 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a409beec5345d23de858b9cfc2d898f0f9067f3e0e10973225e4b6022343f4a [2022-12-13 18:38:22,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 18:38:22,159 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 18:38:22,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 18:38:22,162 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 18:38:22,162 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 18:38:22,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/array-fpi/s42if.c [2022-12-13 18:38:24,771 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 18:38:24,892 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 18:38:24,892 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/sv-benchmarks/c/array-fpi/s42if.c [2022-12-13 18:38:24,896 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/data/449d9635d/48cf70f30d84403a96a39f1b3c3c9246/FLAG7da613b06 [2022-12-13 18:38:24,908 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/data/449d9635d/48cf70f30d84403a96a39f1b3c3c9246 [2022-12-13 18:38:24,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 18:38:24,911 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 18:38:24,912 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 18:38:24,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 18:38:24,915 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 18:38:24,916 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:38:24" (1/1) ... [2022-12-13 18:38:24,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d625363 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:24, skipping insertion in model container [2022-12-13 18:38:24,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 06:38:24" (1/1) ... [2022-12-13 18:38:24,922 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 18:38:24,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 18:38:25,050 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/sv-benchmarks/c/array-fpi/s42if.c[588,601] [2022-12-13 18:38:25,068 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:38:25,076 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 18:38:25,086 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/sv-benchmarks/c/array-fpi/s42if.c[588,601] [2022-12-13 18:38:25,095 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 18:38:25,107 INFO L208 MainTranslator]: Completed translation [2022-12-13 18:38:25,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:25 WrapperNode [2022-12-13 18:38:25,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 18:38:25,108 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 18:38:25,108 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 18:38:25,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 18:38:25,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:25" (1/1) ... [2022-12-13 18:38:25,119 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:25" (1/1) ... [2022-12-13 18:38:25,140 INFO L138 Inliner]: procedures = 17, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 98 [2022-12-13 18:38:25,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 18:38:25,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 18:38:25,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 18:38:25,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 18:38:25,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:25" (1/1) ... [2022-12-13 18:38:25,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:25" (1/1) ... [2022-12-13 18:38:25,150 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:25" (1/1) ... [2022-12-13 18:38:25,151 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:25" (1/1) ... [2022-12-13 18:38:25,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:25" (1/1) ... [2022-12-13 18:38:25,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:25" (1/1) ... [2022-12-13 18:38:25,161 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:25" (1/1) ... [2022-12-13 18:38:25,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:25" (1/1) ... [2022-12-13 18:38:25,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 18:38:25,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 18:38:25,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 18:38:25,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 18:38:25,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:25" (1/1) ... [2022-12-13 18:38:25,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 18:38:25,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:25,190 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 18:38:25,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 18:38:25,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 18:38:25,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 18:38:25,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 18:38:25,222 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 18:38:25,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-13 18:38:25,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 18:38:25,222 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 18:38:25,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 18:38:25,222 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 18:38:25,286 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 18:38:25,288 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 18:38:25,407 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 18:38:25,411 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 18:38:25,411 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-13 18:38:25,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:38:25 BoogieIcfgContainer [2022-12-13 18:38:25,413 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 18:38:25,414 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 18:38:25,414 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 18:38:25,416 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 18:38:25,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 06:38:24" (1/3) ... [2022-12-13 18:38:25,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20932be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:38:25, skipping insertion in model container [2022-12-13 18:38:25,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 06:38:25" (2/3) ... [2022-12-13 18:38:25,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20932be1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 06:38:25, skipping insertion in model container [2022-12-13 18:38:25,418 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 06:38:25" (3/3) ... [2022-12-13 18:38:25,418 INFO L112 eAbstractionObserver]: Analyzing ICFG s42if.c [2022-12-13 18:38:25,432 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 18:38:25,432 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 18:38:25,465 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 18:38:25,469 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2d4c6dfb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 18:38:25,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 18:38:25,472 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 18:38:25,477 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:38:25,477 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:38:25,478 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:38:25,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:25,481 INFO L85 PathProgramCache]: Analyzing trace with hash -845308063, now seen corresponding path program 1 times [2022-12-13 18:38:25,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:25,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130546660] [2022-12-13 18:38:25,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:25,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:25,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:38:25,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:25,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130546660] [2022-12-13 18:38:25,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130546660] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:38:25,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:38:25,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 18:38:25,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051136908] [2022-12-13 18:38:25,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:38:25,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 18:38:25,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:25,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 18:38:25,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 18:38:25,637 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:25,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:38:25,649 INFO L93 Difference]: Finished difference Result 42 states and 60 transitions. [2022-12-13 18:38:25,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 18:38:25,650 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-13 18:38:25,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:38:25,656 INFO L225 Difference]: With dead ends: 42 [2022-12-13 18:38:25,656 INFO L226 Difference]: Without dead ends: 19 [2022-12-13 18:38:25,658 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 [2022-12-13 18:38:25,660 INFO L413 NwaCegarLoop]: 28 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, 28 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 [2022-12-13 18:38:25,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:38:25,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-13 18:38:25,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-13 18:38:25,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:25,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-12-13 18:38:25,683 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 13 [2022-12-13 18:38:25,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:38:25,684 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-12-13 18:38:25,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:25,684 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-12-13 18:38:25,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-12-13 18:38:25,684 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:38:25,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:38:25,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 18:38:25,685 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:38:25,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:25,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1238662774, now seen corresponding path program 1 times [2022-12-13 18:38:25,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:25,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395274324] [2022-12-13 18:38:25,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:25,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:38:25,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:25,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395274324] [2022-12-13 18:38:25,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395274324] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 18:38:25,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 18:38:25,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 18:38:25,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222764756] [2022-12-13 18:38:25,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 18:38:25,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 18:38:25,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:25,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 18:38:25,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:38:25,800 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:25,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:38:25,854 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2022-12-13 18:38:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 18:38:25,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-12-13 18:38:25,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:38:25,856 INFO L225 Difference]: With dead ends: 39 [2022-12-13 18:38:25,856 INFO L226 Difference]: Without dead ends: 27 [2022-12-13 18:38:25,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-12-13 18:38:25,857 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 35 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:38:25,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 11 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-13 18:38:25,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-13 18:38:25,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-12-13 18:38:25,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-12-13 18:38:25,862 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2022-12-13 18:38:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:38:25,862 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-12-13 18:38:25,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-12-13 18:38:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 18:38:25,863 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:38:25,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:38:25,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 18:38:25,864 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:38:25,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:25,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1944018757, now seen corresponding path program 1 times [2022-12-13 18:38:25,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:25,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87256965] [2022-12-13 18:38:25,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:25,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:38:26,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:26,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87256965] [2022-12-13 18:38:26,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87256965] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:38:26,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026997046] [2022-12-13 18:38:26,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:26,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:26,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:26,358 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:38:26,360 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 18:38:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:26,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 35 conjunts are in the unsatisfiable core [2022-12-13 18:38:26,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:38:26,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:38:26,564 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:38:26,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:38:26,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:38:26,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-12-13 18:38:26,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 27 [2022-12-13 18:38:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:38:26,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:38:27,115 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~N~0 5))) (and (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_45 (Array Int Int))) (let ((.cse0 (select v_ArrVal_45 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= 5 .cse0)) (<= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_45) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) .cse0) .cse1)))) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_45 (Array Int Int))) (let ((.cse2 (select v_ArrVal_45 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= 5 .cse2)) (<= .cse1 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_45) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) .cse2))))))) is different from false [2022-12-13 18:38:27,362 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:38:27,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 72 [2022-12-13 18:38:27,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-13 18:38:27,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 54 [2022-12-13 18:38:27,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-13 18:38:27,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2022-12-13 18:38:27,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 18:38:27,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026997046] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:38:27,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:38:27,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 23 [2022-12-13 18:38:27,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303197166] [2022-12-13 18:38:27,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:38:27,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-12-13 18:38:27,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:27,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-12-13 18:38:27,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=372, Unknown=1, NotChecked=40, Total=506 [2022-12-13 18:38:27,426 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:42,471 WARN L233 SmtUtils]: Spent 6.15s on a formula simplification. DAG size of input: 57 DAG size of output: 47 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:38:42,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:38:42,764 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2022-12-13 18:38:42,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-12-13 18:38:42,765 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-13 18:38:42,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:38:42,766 INFO L225 Difference]: With dead ends: 52 [2022-12-13 18:38:42,766 INFO L226 Difference]: Without dead ends: 48 [2022-12-13 18:38:42,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 2 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 15.4s TimeCoverageRelationStatistics Valid=357, Invalid=1052, Unknown=1, NotChecked=72, Total=1482 [2022-12-13 18:38:42,769 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 133 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:38:42,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 43 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 264 Invalid, 1 Unknown, 46 Unchecked, 0.4s Time] [2022-12-13 18:38:42,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-12-13 18:38:42,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 35. [2022-12-13 18:38:42,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-12-13 18:38:42,779 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 21 [2022-12-13 18:38:42,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:38:42,779 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-12-13 18:38:42,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:42,780 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-12-13 18:38:42,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 18:38:42,780 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:38:42,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:38:42,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 18:38:42,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-13 18:38:42,982 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:38:42,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:42,984 INFO L85 PathProgramCache]: Analyzing trace with hash 2001277059, now seen corresponding path program 1 times [2022-12-13 18:38:42,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:42,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501545306] [2022-12-13 18:38:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:42,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:43,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 18:38:43,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1949456398] [2022-12-13 18:38:43,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:43,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:43,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:43,033 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:38:43,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 18:38:43,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:43,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2022-12-13 18:38:43,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:38:43,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2022-12-13 18:38:43,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:38:43,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:38:43,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:38:43,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-12-13 18:38:43,253 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-13 18:38:43,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 24 [2022-12-13 18:38:43,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:38:43,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:43,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501545306] [2022-12-13 18:38:43,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 18:38:43,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949456398] [2022-12-13 18:38:43,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949456398] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:38:43,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:38:43,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-12-13 18:38:43,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783797150] [2022-12-13 18:38:43,268 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:38:43,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 18:38:43,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:43,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 18:38:43,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-12-13 18:38:43,270 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:38:43,468 INFO L93 Difference]: Finished difference Result 75 states and 99 transitions. [2022-12-13 18:38:43,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-13 18:38:43,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-13 18:38:43,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:38:43,470 INFO L225 Difference]: With dead ends: 75 [2022-12-13 18:38:43,470 INFO L226 Difference]: Without dead ends: 63 [2022-12-13 18:38:43,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-12-13 18:38:43,472 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:38:43,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 49 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:38:43,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-13 18:38:43,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 47. [2022-12-13 18:38:43,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:43,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 60 transitions. [2022-12-13 18:38:43,485 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 60 transitions. Word has length 21 [2022-12-13 18:38:43,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:38:43,485 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 60 transitions. [2022-12-13 18:38:43,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:43,485 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 60 transitions. [2022-12-13 18:38:43,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-12-13 18:38:43,486 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:38:43,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:38:43,492 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-12-13 18:38:43,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:43,687 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:38:43,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:43,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1592625659, now seen corresponding path program 1 times [2022-12-13 18:38:43,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:43,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862065714] [2022-12-13 18:38:43,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:43,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:43,698 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 18:38:43,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [474956408] [2022-12-13 18:38:43,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:43,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:43,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:43,700 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:38:43,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 18:38:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:43,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2022-12-13 18:38:43,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:38:43,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:38:43,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:38:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:38:43,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:38:43,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2022-12-13 18:38:43,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-12-13 18:38:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:38:43,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:43,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862065714] [2022-12-13 18:38:43,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 18:38:43,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474956408] [2022-12-13 18:38:43,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474956408] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:38:43,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:38:43,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-12-13 18:38:43,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781718181] [2022-12-13 18:38:43,852 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:38:43,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-13 18:38:43,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:43,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-13 18:38:43,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 18:38:43,853 INFO L87 Difference]: Start difference. First operand 47 states and 60 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:43,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:38:43,970 INFO L93 Difference]: Finished difference Result 78 states and 102 transitions. [2022-12-13 18:38:43,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 18:38:43,970 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-12-13 18:38:43,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:38:43,971 INFO L225 Difference]: With dead ends: 78 [2022-12-13 18:38:43,971 INFO L226 Difference]: Without dead ends: 57 [2022-12-13 18:38:43,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:38:43,972 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:38:43,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 58 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:38:43,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-12-13 18:38:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2022-12-13 18:38:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 48 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2022-12-13 18:38:43,984 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 21 [2022-12-13 18:38:43,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:38:43,984 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2022-12-13 18:38:43,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:43,985 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2022-12-13 18:38:43,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-12-13 18:38:43,985 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:38:43,985 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:38:43,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 18:38:44,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:44,187 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:38:44,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:44,188 INFO L85 PathProgramCache]: Analyzing trace with hash -823792505, now seen corresponding path program 2 times [2022-12-13 18:38:44,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:44,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769117772] [2022-12-13 18:38:44,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:44,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:38:44,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:44,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769117772] [2022-12-13 18:38:44,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769117772] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:38:44,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129222239] [2022-12-13 18:38:44,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:38:44,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:44,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:44,400 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:38:44,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 18:38:44,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:38:44,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:38:44,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:38:44,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:38:44,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:38:44,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:38:44,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:38:44,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129222239] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:38:44,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:38:44,566 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 18:38:44,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315748974] [2022-12-13 18:38:44,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:38:44,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 18:38:44,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:44,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 18:38:44,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:38:44,568 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:44,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:38:44,739 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2022-12-13 18:38:44,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:38:44,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-12-13 18:38:44,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:38:44,740 INFO L225 Difference]: With dead ends: 85 [2022-12-13 18:38:44,740 INFO L226 Difference]: Without dead ends: 75 [2022-12-13 18:38:44,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-12-13 18:38:44,742 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 56 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:38:44,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 25 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:38:44,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-13 18:38:44,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 53. [2022-12-13 18:38:44,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 52 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:44,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2022-12-13 18:38:44,764 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 23 [2022-12-13 18:38:44,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:38:44,764 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2022-12-13 18:38:44,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:44,765 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2022-12-13 18:38:44,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-13 18:38:44,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:38:44,765 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:38:44,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 18:38:44,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 18:38:44,966 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:38:44,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:44,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1832157868, now seen corresponding path program 3 times [2022-12-13 18:38:44,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:44,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506724551] [2022-12-13 18:38:44,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:44,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:38:45,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:45,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506724551] [2022-12-13 18:38:45,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506724551] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:38:45,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041841592] [2022-12-13 18:38:45,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:38:45,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:45,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:45,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:38:45,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 18:38:45,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-13 18:38:45,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:38:45,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 18:38:45,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:38:45,168 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:38:45,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:38:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 18:38:45,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041841592] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:38:45,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:38:45,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-12-13 18:38:45,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331208924] [2022-12-13 18:38:45,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:38:45,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-12-13 18:38:45,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:45,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-12-13 18:38:45,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-13 18:38:45,219 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:38:45,350 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2022-12-13 18:38:45,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-12-13 18:38:45,350 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-12-13 18:38:45,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:38:45,351 INFO L225 Difference]: With dead ends: 78 [2022-12-13 18:38:45,351 INFO L226 Difference]: Without dead ends: 42 [2022-12-13 18:38:45,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-12-13 18:38:45,352 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:38:45,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 23 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:38:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-12-13 18:38:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2022-12-13 18:38:45,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-12-13 18:38:45,362 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 24 [2022-12-13 18:38:45,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:38:45,362 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-12-13 18:38:45,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:45,362 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-12-13 18:38:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 18:38:45,363 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:38:45,363 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:38:45,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-12-13 18:38:45,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:45,564 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:38:45,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:45,564 INFO L85 PathProgramCache]: Analyzing trace with hash -14433298, now seen corresponding path program 4 times [2022-12-13 18:38:45,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:45,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350926329] [2022-12-13 18:38:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:45,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:45,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:46,154 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:38:46,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:46,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350926329] [2022-12-13 18:38:46,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350926329] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:38:46,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921188004] [2022-12-13 18:38:46,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:38:46,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:46,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:46,155 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:38:46,156 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 18:38:46,212 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:38:46,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:38:46,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 43 conjunts are in the unsatisfiable core [2022-12-13 18:38:46,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:38:46,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:38:46,229 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:38:46,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:38:46,294 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:38:46,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:38:46,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:38:46,542 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-12-13 18:38:46,661 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 18:38:46,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 41 [2022-12-13 18:38:46,771 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 18:38:46,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 32 [2022-12-13 18:38:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:38:46,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:38:47,299 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_~N~0 5))) (and (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_208 (Array Int Int))) (let ((.cse0 (select v_ArrVal_208 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= 5 .cse0)) (forall ((v_subst_1 Int)) (let ((.cse4 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_208))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (select (select (store .cse4 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse0))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_1))))) (or (not (= .cse1 5)) (<= .cse2 (+ .cse1 .cse3 .cse0))))))))))) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_208 (Array Int Int))) (let ((.cse6 (select v_ArrVal_208 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= 5 .cse6)) (forall ((v_subst_2 Int)) (let ((.cse9 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_208))) (let ((.cse10 (select .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse7 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse8 (select (select (store .cse9 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse7 .cse6))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_2))))) (or (<= (+ .cse7 .cse6 .cse8) .cse2) (not (= 5 .cse8))))))))))))) is different from false [2022-12-13 18:38:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-12-13 18:38:49,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921188004] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:38:49,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:38:49,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 15] total 36 [2022-12-13 18:38:49,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769829251] [2022-12-13 18:38:49,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:38:49,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 18:38:49,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:49,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 18:38:49,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1048, Unknown=7, NotChecked=66, Total=1260 [2022-12-13 18:38:49,996 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:57,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:38:57,450 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-12-13 18:38:57,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-13 18:38:57,451 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-13 18:38:57,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:38:57,452 INFO L225 Difference]: With dead ends: 82 [2022-12-13 18:38:57,452 INFO L226 Difference]: Without dead ends: 78 [2022-12-13 18:38:57,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=393, Invalid=2356, Unknown=11, NotChecked=102, Total=2862 [2022-12-13 18:38:57,453 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 95 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 126 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:38:57,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 148 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 684 Invalid, 14 Unknown, 61 Unchecked, 1.4s Time] [2022-12-13 18:38:57,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-12-13 18:38:57,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 65. [2022-12-13 18:38:57,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.28125) internal successors, (82), 64 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:57,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2022-12-13 18:38:57,463 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 29 [2022-12-13 18:38:57,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:38:57,463 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2022-12-13 18:38:57,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:57,464 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2022-12-13 18:38:57,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 18:38:57,464 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:38:57,464 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:38:57,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-13 18:38:57,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:57,665 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:38:57,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:57,665 INFO L85 PathProgramCache]: Analyzing trace with hash 42825004, now seen corresponding path program 1 times [2022-12-13 18:38:57,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:57,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031317270] [2022-12-13 18:38:57,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:57,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:57,673 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 18:38:57,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111999467] [2022-12-13 18:38:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:57,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:57,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:57,675 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:38:57,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 18:38:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:57,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-13 18:38:57,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:38:57,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-12-13 18:38:57,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:38:57,865 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:38:57,896 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:38:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 18:38:57,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:38:57,939 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_253 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_253) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) is different from false [2022-12-13 18:38:58,020 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:38:58,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 31 [2022-12-13 18:38:58,026 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:38:58,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 34 [2022-12-13 18:38:58,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-12-13 18:38:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 2 not checked. [2022-12-13 18:38:58,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:58,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031317270] [2022-12-13 18:38:58,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 18:38:58,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111999467] [2022-12-13 18:38:58,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111999467] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:38:58,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:38:58,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2022-12-13 18:38:58,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976599058] [2022-12-13 18:38:58,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:38:58,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-13 18:38:58,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:58,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-13 18:38:58,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=241, Unknown=5, NotChecked=32, Total=342 [2022-12-13 18:38:58,095 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:58,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:38:58,544 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2022-12-13 18:38:58,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:38:58,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-13 18:38:58,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:38:58,545 INFO L225 Difference]: With dead ends: 114 [2022-12-13 18:38:58,545 INFO L226 Difference]: Without dead ends: 107 [2022-12-13 18:38:58,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=359, Unknown=5, NotChecked=40, Total=506 [2022-12-13 18:38:58,547 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 130 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:38:58,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 90 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 377 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-12-13 18:38:58,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-12-13 18:38:58,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 71. [2022-12-13 18:38:58,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 70 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:58,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-12-13 18:38:58,558 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 29 [2022-12-13 18:38:58,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:38:58,559 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-12-13 18:38:58,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:58,559 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-12-13 18:38:58,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-13 18:38:58,559 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:38:58,559 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:38:58,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-13 18:38:58,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-12-13 18:38:58,761 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:38:58,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:58,763 INFO L85 PathProgramCache]: Analyzing trace with hash -968292246, now seen corresponding path program 1 times [2022-12-13 18:38:58,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:58,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867241463] [2022-12-13 18:38:58,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:58,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:58,796 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 18:38:58,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368768561] [2022-12-13 18:38:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:58,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:58,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:58,798 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:38:58,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 18:38:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:58,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2022-12-13 18:38:58,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:38:58,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 18:38:58,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:38:58,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 18:38:58,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:38:58,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 18:38:58,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:38:59,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-13 18:38:59,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-13 18:38:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 18:38:59,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:59,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867241463] [2022-12-13 18:38:59,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 18:38:59,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368768561] [2022-12-13 18:38:59,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368768561] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:38:59,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:38:59,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2022-12-13 18:38:59,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457079134] [2022-12-13 18:38:59,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:38:59,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 18:38:59,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:59,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 18:38:59,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-12-13 18:38:59,025 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:59,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:38:59,174 INFO L93 Difference]: Finished difference Result 115 states and 148 transitions. [2022-12-13 18:38:59,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:38:59,174 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-12-13 18:38:59,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:38:59,175 INFO L225 Difference]: With dead ends: 115 [2022-12-13 18:38:59,175 INFO L226 Difference]: Without dead ends: 84 [2022-12-13 18:38:59,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-12-13 18:38:59,176 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:38:59,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 66 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:38:59,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-13 18:38:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2022-12-13 18:38:59,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.25) internal successors, (90), 72 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 90 transitions. [2022-12-13 18:38:59,189 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 90 transitions. Word has length 29 [2022-12-13 18:38:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:38:59,189 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 90 transitions. [2022-12-13 18:38:59,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:38:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 90 transitions. [2022-12-13 18:38:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-12-13 18:38:59,190 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:38:59,190 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:38:59,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-12-13 18:38:59,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 18:38:59,391 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:38:59,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:38:59,393 INFO L85 PathProgramCache]: Analyzing trace with hash -554569936, now seen corresponding path program 5 times [2022-12-13 18:38:59,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:38:59,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462631808] [2022-12-13 18:38:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:38:59,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:38:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:38:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 18:38:59,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:38:59,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462631808] [2022-12-13 18:38:59,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462631808] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:38:59,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906469929] [2022-12-13 18:38:59,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:38:59,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:38:59,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:38:59,550 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:38:59,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 18:38:59,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-12-13 18:38:59,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:38:59,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:38:59,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:38:59,672 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 18:38:59,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:38:59,722 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 18:38:59,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906469929] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:38:59,722 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:38:59,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-13 18:38:59,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621857392] [2022-12-13 18:38:59,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:38:59,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 18:38:59,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:38:59,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 18:38:59,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-12-13 18:38:59,724 INFO L87 Difference]: Start difference. First operand 73 states and 90 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:00,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:39:00,008 INFO L93 Difference]: Finished difference Result 121 states and 151 transitions. [2022-12-13 18:39:00,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 18:39:00,008 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-12-13 18:39:00,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:39:00,009 INFO L225 Difference]: With dead ends: 121 [2022-12-13 18:39:00,010 INFO L226 Difference]: Without dead ends: 108 [2022-12-13 18:39:00,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-12-13 18:39:00,011 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 66 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:39:00,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 34 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:39:00,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-12-13 18:39:00,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2022-12-13 18:39:00,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.2702702702702702) internal successors, (94), 74 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 94 transitions. [2022-12-13 18:39:00,022 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 94 transitions. Word has length 31 [2022-12-13 18:39:00,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:39:00,022 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 94 transitions. [2022-12-13 18:39:00,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:00,023 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 94 transitions. [2022-12-13 18:39:00,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 18:39:00,023 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:39:00,023 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:39:00,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 18:39:00,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-13 18:39:00,224 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:39:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:39:00,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1053387787, now seen corresponding path program 6 times [2022-12-13 18:39:00,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:39:00,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933734863] [2022-12-13 18:39:00,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:39:00,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:39:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:39:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 18:39:00,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:39:00,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933734863] [2022-12-13 18:39:00,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933734863] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:39:00,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671896496] [2022-12-13 18:39:00,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:39:00,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:39:00,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:39:00,360 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:39:00,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 18:39:00,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-12-13 18:39:00,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:39:00,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 18:39:00,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:39:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 18:39:00,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:39:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-13 18:39:00,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671896496] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:39:00,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:39:00,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-12-13 18:39:00,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447828194] [2022-12-13 18:39:00,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:39:00,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-13 18:39:00,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:39:00,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-13 18:39:00,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-12-13 18:39:00,554 INFO L87 Difference]: Start difference. First operand 75 states and 94 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:00,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:39:00,686 INFO L93 Difference]: Finished difference Result 109 states and 133 transitions. [2022-12-13 18:39:00,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-12-13 18:39:00,687 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-12-13 18:39:00,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:39:00,687 INFO L225 Difference]: With dead ends: 109 [2022-12-13 18:39:00,687 INFO L226 Difference]: Without dead ends: 53 [2022-12-13 18:39:00,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-12-13 18:39:00,689 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:39:00,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 30 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 18:39:00,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-12-13 18:39:00,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2022-12-13 18:39:00,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:00,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-12-13 18:39:00,697 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 32 [2022-12-13 18:39:00,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:39:00,697 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-12-13 18:39:00,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:00,697 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-12-13 18:39:00,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 18:39:00,697 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:39:00,697 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:39:00,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-13 18:39:00,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 18:39:00,899 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:39:00,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:39:00,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1383779305, now seen corresponding path program 7 times [2022-12-13 18:39:00,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:39:00,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157357838] [2022-12-13 18:39:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:39:00,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:39:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:39:01,618 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-12-13 18:39:01,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:39:01,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157357838] [2022-12-13 18:39:01,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157357838] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:39:01,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349167051] [2022-12-13 18:39:01,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:39:01,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:39:01,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:39:01,620 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:39:01,621 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 18:39:01,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:39:01,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 60 conjunts are in the unsatisfiable core [2022-12-13 18:39:01,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:39:01,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:39:01,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:39:01,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:39:01,848 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:39:01,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:39:02,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:39:02,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:39:02,058 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:39:02,132 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-12-13 18:39:02,263 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 18:39:02,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-12-13 18:39:02,401 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 18:39:02,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-12-13 18:39:02,511 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 18:39:02,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 32 [2022-12-13 18:39:02,541 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:39:02,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:39:03,845 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse3 (* c_~N~0 5))) (and (forall ((|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_438 (Array Int Int)) (|ULTIMATE.start_main_~a~0#1.offset| Int)) (let ((.cse0 (select v_ArrVal_438 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= .cse0 5)) (forall ((v_subst_6 Int)) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_438))) (let ((.cse6 (select .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse4 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse1 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse0 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_6))))) (or (not (= .cse1 5)) (forall ((v_subst_4 Int)) (let ((.cse2 (select (select (store .cse5 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse1 .cse0 .cse4))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_4))))) (or (not (= 5 .cse2)) (<= .cse3 (+ .cse1 .cse0 .cse2 .cse4)))))))))))))) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_438 (Array Int Int)) (|ULTIMATE.start_main_~a~0#1.offset| Int)) (let ((.cse7 (select v_ArrVal_438 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= .cse7 5)) (forall ((v_subst_5 Int)) (let ((.cse11 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_438))) (let ((.cse12 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse10 (select .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse8 (select (select (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse7 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_5))))) (or (not (= 5 .cse8)) (forall ((v_subst_3 Int)) (let ((.cse9 (select (select (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse12 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse7 .cse8 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_3))))) (or (<= (+ .cse7 .cse9 .cse8 .cse10) .cse3) (not (= 5 .cse9)))))))))))))))) is different from false [2022-12-13 18:39:16,114 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 18:39:16,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 835 treesize of output 1 [2022-12-13 18:39:16,117 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 7 trivial. 5 not checked. [2022-12-13 18:39:16,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349167051] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:39:16,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:39:16,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 16] total 44 [2022-12-13 18:39:16,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043019599] [2022-12-13 18:39:16,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:39:16,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-12-13 18:39:16,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:39:16,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-12-13 18:39:16,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1636, Unknown=2, NotChecked=82, Total=1892 [2022-12-13 18:39:16,120 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:39:29,952 WARN L233 SmtUtils]: Spent 5.35s on a formula simplification. DAG size of input: 104 DAG size of output: 86 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:39:36,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:39:47,133 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~N~0 5))) (let ((.cse3 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse2 (and (forall ((|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_438 (Array Int Int)) (|ULTIMATE.start_main_~a~0#1.offset| Int)) (let ((.cse6 (select v_ArrVal_438 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= .cse6 5)) (forall ((v_subst_6 Int)) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_438))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse9 (select .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse7 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse6 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_6))))) (or (not (= .cse7 5)) (forall ((v_subst_4 Int)) (let ((.cse8 (select (select (store .cse10 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse11 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse7 .cse6 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_4))))) (or (not (= 5 .cse8)) (<= .cse5 (+ .cse7 .cse6 .cse8 .cse9)))))))))))))) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_438 (Array Int Int)) (|ULTIMATE.start_main_~a~0#1.offset| Int)) (let ((.cse12 (select v_ArrVal_438 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= .cse12 5)) (forall ((v_subst_5 Int)) (let ((.cse16 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_438))) (let ((.cse17 (select .cse16 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse15 (select .cse17 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse13 (select (select (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse17 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse12 .cse15))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_5))))) (or (not (= 5 .cse13)) (forall ((v_subst_3 Int)) (let ((.cse14 (select (select (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse17 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse12 .cse13 .cse15))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* 4 v_subst_3))))) (or (<= (+ .cse12 .cse14 .cse13 .cse15) .cse5) (not (= 5 .cse14))))))))))))))))) (and (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (<= 3 c_~N~0) (let ((.cse0 (<= (mod c_~N~0 4294967296) 536870911))) (or (and (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 1) .cse0) (and (not .cse0) (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| 0)))) (exists ((|ULTIMATE.start_main_~i~0#1| Int)) (= 5 (select .cse1 (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (or .cse2 (not (< (+ 2 |c_ULTIMATE.start_main_~i~0#1|) c_~N~0)) (< (+ 3 |c_ULTIMATE.start_main_~i~0#1|) c_~N~0)) (<= c_~N~0 3) (= .cse3 5) (or (let ((.cse4 (+ .cse3 5 (select .cse1 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))))) (and (<= .cse4 .cse5) (<= .cse5 .cse4))) (not (= 5 |c_ULTIMATE.start_main_#t~mem12#1|))) (or .cse2 (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0))))) is different from false [2022-12-13 18:39:49,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:39:56,545 WARN L233 SmtUtils]: Spent 6.33s on a formula simplification. DAG size of input: 108 DAG size of output: 98 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:40:19,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:40:29,868 WARN L233 SmtUtils]: Spent 7.06s on a formula simplification. DAG size of input: 145 DAG size of output: 135 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:40:36,924 WARN L233 SmtUtils]: Spent 6.64s on a formula simplification that was a NOOP. DAG size: 110 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:40:39,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:40:39,445 INFO L93 Difference]: Finished difference Result 157 states and 187 transitions. [2022-12-13 18:40:39,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-12-13 18:40:39,445 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-12-13 18:40:39,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:40:39,447 INFO L225 Difference]: With dead ends: 157 [2022-12-13 18:40:39,447 INFO L226 Difference]: Without dead ends: 149 [2022-12-13 18:40:39,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 101 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2911 ImplicationChecksByTransitivity, 83.6s TimeCoverageRelationStatistics Valid=1167, Invalid=8926, Unknown=15, NotChecked=398, Total=10506 [2022-12-13 18:40:39,449 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 201 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 157 mSolverCounterUnsat, 39 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 1736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 39 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 12.9s IncrementalHoareTripleChecker+Time [2022-12-13 18:40:39,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 248 Invalid, 1736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 1473 Invalid, 39 Unknown, 67 Unchecked, 12.9s Time] [2022-12-13 18:40:39,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-12-13 18:40:39,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 97. [2022-12-13 18:40:39,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.2708333333333333) internal successors, (122), 96 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:40:39,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 122 transitions. [2022-12-13 18:40:39,468 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 122 transitions. Word has length 37 [2022-12-13 18:40:39,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:40:39,468 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 122 transitions. [2022-12-13 18:40:39,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:40:39,468 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 122 transitions. [2022-12-13 18:40:39,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 18:40:39,469 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:40:39,469 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:40:39,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-12-13 18:40:39,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-13 18:40:39,670 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:40:39,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:40:39,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1441037607, now seen corresponding path program 2 times [2022-12-13 18:40:39,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:40:39,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825479553] [2022-12-13 18:40:39,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:40:39,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:40:39,709 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 18:40:39,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040785335] [2022-12-13 18:40:39,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:40:39,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:40:39,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:40:39,712 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:40:39,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 18:40:39,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:40:39,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:40:39,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 30 conjunts are in the unsatisfiable core [2022-12-13 18:40:39,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:40:40,023 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2022-12-13 18:40:40,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:40:40,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:40:40,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:40:40,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:40:40,258 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:40:40,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2022-12-13 18:40:40,361 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:40:40,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:40:49,841 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:40:49,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 33 [2022-12-13 18:40:49,853 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:40:49,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 38 [2022-12-13 18:40:49,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2022-12-13 18:40:50,335 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:40:50,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:40:50,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825479553] [2022-12-13 18:40:50,335 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 18:40:50,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040785335] [2022-12-13 18:40:50,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040785335] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:40:50,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:40:50,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-12-13 18:40:50,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574022065] [2022-12-13 18:40:50,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:40:50,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-12-13 18:40:50,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:40:50,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-12-13 18:40:50,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=909, Unknown=12, NotChecked=0, Total=1122 [2022-12-13 18:40:50,337 INFO L87 Difference]: Start difference. First operand 97 states and 122 transitions. Second operand has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:41:47,846 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:41:49,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:41:51,850 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:41:53,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:41:55,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:41:57,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:42:18,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:42:21,014 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:42:21,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:42:21,685 INFO L93 Difference]: Finished difference Result 269 states and 350 transitions. [2022-12-13 18:42:21,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-12-13 18:42:21,686 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-12-13 18:42:21,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:42:21,687 INFO L225 Difference]: With dead ends: 269 [2022-12-13 18:42:21,687 INFO L226 Difference]: Without dead ends: 262 [2022-12-13 18:42:21,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 83.8s TimeCoverageRelationStatistics Valid=678, Invalid=2479, Unknown=35, NotChecked=0, Total=3192 [2022-12-13 18:42:21,689 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 322 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 135 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:42:21,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 106 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 762 Invalid, 8 Unknown, 0 Unchecked, 17.3s Time] [2022-12-13 18:42:21,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-12-13 18:42:21,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 170. [2022-12-13 18:42:21,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.3076923076923077) internal successors, (221), 169 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:42:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 221 transitions. [2022-12-13 18:42:21,725 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 221 transitions. Word has length 37 [2022-12-13 18:42:21,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:42:21,725 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 221 transitions. [2022-12-13 18:42:21,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.9705882352941178) internal successors, (67), 34 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:42:21,726 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 221 transitions. [2022-12-13 18:42:21,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-13 18:42:21,726 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:42:21,726 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:42:21,730 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-13 18:42:21,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:42:21,927 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:42:21,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:42:21,928 INFO L85 PathProgramCache]: Analyzing trace with hash -147310295, now seen corresponding path program 2 times [2022-12-13 18:42:21,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:42:21,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713397676] [2022-12-13 18:42:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:42:21,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:42:21,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 18:42:21,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920747484] [2022-12-13 18:42:21,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:42:21,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:42:21,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:42:21,952 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:42:21,954 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-13 18:42:22,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:42:22,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:42:22,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-13 18:42:22,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:42:22,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-12-13 18:42:22,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:42:22,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 18:42:22,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:42:22,222 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 18:42:22,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-12-13 18:42:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:42:22,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:42:22,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-12-13 18:42:22,394 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-12-13 18:42:22,465 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:42:22,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:42:22,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713397676] [2022-12-13 18:42:22,465 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 18:42:22,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920747484] [2022-12-13 18:42:22,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920747484] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:42:22,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:42:22,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-12-13 18:42:22,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396877656] [2022-12-13 18:42:22,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:42:22,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 18:42:22,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:42:22,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 18:42:22,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-12-13 18:42:22,467 INFO L87 Difference]: Start difference. First operand 170 states and 221 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:42:23,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:42:23,007 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2022-12-13 18:42:23,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-13 18:42:23,008 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-12-13 18:42:23,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:42:23,009 INFO L225 Difference]: With dead ends: 292 [2022-12-13 18:42:23,009 INFO L226 Difference]: Without dead ends: 190 [2022-12-13 18:42:23,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-12-13 18:42:23,010 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 11 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:42:23,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 79 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-13 18:42:23,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-12-13 18:42:23,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 170. [2022-12-13 18:42:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 1.2958579881656804) internal successors, (219), 169 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:42:23,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 219 transitions. [2022-12-13 18:42:23,051 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 219 transitions. Word has length 37 [2022-12-13 18:42:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:42:23,052 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 219 transitions. [2022-12-13 18:42:23,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:42:23,052 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 219 transitions. [2022-12-13 18:42:23,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-12-13 18:42:23,053 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:42:23,053 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:42:23,057 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-13 18:42:23,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-13 18:42:23,254 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:42:23,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:42:23,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1016239403, now seen corresponding path program 8 times [2022-12-13 18:42:23,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:42:23,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686148402] [2022-12-13 18:42:23,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:42:23,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:42:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:42:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:42:23,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:42:23,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686148402] [2022-12-13 18:42:23,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686148402] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:42:23,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938518208] [2022-12-13 18:42:23,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 18:42:23,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:42:23,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:42:23,470 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:42:23,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-13 18:42:23,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 18:42:23,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:42:23,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:42:23,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:42:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:42:23,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:42:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:42:23,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938518208] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:42:23,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:42:23,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-12-13 18:42:23,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720099412] [2022-12-13 18:42:23,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:42:23,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 18:42:23,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:42:23,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 18:42:23,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-12-13 18:42:23,860 INFO L87 Difference]: Start difference. First operand 170 states and 219 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:42:24,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:42:24,512 INFO L93 Difference]: Finished difference Result 213 states and 275 transitions. [2022-12-13 18:42:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 18:42:24,513 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-12-13 18:42:24,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:42:24,513 INFO L225 Difference]: With dead ends: 213 [2022-12-13 18:42:24,513 INFO L226 Difference]: Without dead ends: 197 [2022-12-13 18:42:24,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2022-12-13 18:42:24,514 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-13 18:42:24,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 32 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-13 18:42:24,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-12-13 18:42:24,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 109. [2022-12-13 18:42:24,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.25) internal successors, (135), 108 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:42:24,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-12-13 18:42:24,540 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 39 [2022-12-13 18:42:24,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:42:24,540 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-12-13 18:42:24,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:42:24,540 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-12-13 18:42:24,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-13 18:42:24,541 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:42:24,541 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:42:24,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-12-13 18:42:24,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:42:24,742 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:42:24,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:42:24,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1682760144, now seen corresponding path program 9 times [2022-12-13 18:42:24,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:42:24,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300383099] [2022-12-13 18:42:24,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:42:24,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:42:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:42:24,940 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:42:24,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:42:24,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300383099] [2022-12-13 18:42:24,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300383099] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:42:24,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431519269] [2022-12-13 18:42:24,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:42:24,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:42:24,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:42:24,942 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:42:24,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-13 18:42:25,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 18:42:25,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:42:25,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-13 18:42:25,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:42:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:42:25,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:42:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-13 18:42:25,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431519269] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:42:25,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:42:25,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-12-13 18:42:25,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623525629] [2022-12-13 18:42:25,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:42:25,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 18:42:25,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:42:25,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 18:42:25,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-12-13 18:42:25,363 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:42:25,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:42:25,678 INFO L93 Difference]: Finished difference Result 138 states and 169 transitions. [2022-12-13 18:42:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 18:42:25,679 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-13 18:42:25,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:42:25,679 INFO L225 Difference]: With dead ends: 138 [2022-12-13 18:42:25,679 INFO L226 Difference]: Without dead ends: 61 [2022-12-13 18:42:25,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-12-13 18:42:25,680 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 84 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 18:42:25,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 26 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 18:42:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-12-13 18:42:25,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2022-12-13 18:42:25,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:42:25,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-12-13 18:42:25,694 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 40 [2022-12-13 18:42:25,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:42:25,694 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-12-13 18:42:25,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:42:25,694 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-12-13 18:42:25,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 18:42:25,694 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:42:25,694 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:42:25,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-13 18:42:25,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 18:42:25,896 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:42:25,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:42:25,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2111860654, now seen corresponding path program 10 times [2022-12-13 18:42:25,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:42:25,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803417612] [2022-12-13 18:42:25,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:42:25,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:42:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:42:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-12-13 18:42:27,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:42:27,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803417612] [2022-12-13 18:42:27,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803417612] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:42:27,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990982685] [2022-12-13 18:42:27,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:42:27,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:42:27,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:42:27,456 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:42:27,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-13 18:42:27,537 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:42:27,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:42:27,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 74 conjunts are in the unsatisfiable core [2022-12-13 18:42:27,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:42:27,695 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:42:27,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:42:27,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:42:27,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:42:28,021 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:42:28,137 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:42:28,381 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:42:28,529 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:42:28,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:42:28,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:42:29,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-12-13 18:42:29,364 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 18:42:29,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-12-13 18:42:29,627 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 18:42:29,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 43 [2022-12-13 18:42:29,963 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 18:42:29,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 43 [2022-12-13 18:42:30,147 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 18:42:30,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 32 [2022-12-13 18:42:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:42:30,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:43:25,896 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 18:43:25,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1833 treesize of output 1 [2022-12-13 18:43:25,899 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 18:43:25,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990982685] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:43:25,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:43:25,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 23] total 62 [2022-12-13 18:43:25,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276455048] [2022-12-13 18:43:25,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:43:25,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-12-13 18:43:25,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:43:25,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-12-13 18:43:25,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=3420, Unknown=8, NotChecked=0, Total=3782 [2022-12-13 18:43:25,901 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 62 states, 62 states have (on average 1.8548387096774193) internal successors, (115), 62 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:43:34,578 WARN L233 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 135 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:43:45,479 WARN L233 SmtUtils]: Spent 10.26s on a formula simplification. DAG size of input: 136 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:44:05,636 WARN L233 SmtUtils]: Spent 6.75s on a formula simplification. DAG size of input: 201 DAG size of output: 127 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:44:08,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:44:11,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:44:32,196 WARN L233 SmtUtils]: Spent 12.69s on a formula simplification. DAG size of input: 192 DAG size of output: 115 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:44:44,719 WARN L233 SmtUtils]: Spent 9.51s on a formula simplification. DAG size of input: 182 DAG size of output: 108 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:45:05,652 WARN L233 SmtUtils]: Spent 14.78s on a formula simplification. DAG size of input: 194 DAG size of output: 111 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:45:07,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:45:09,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:45:23,085 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 197 DAG size of output: 176 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:45:30,422 WARN L233 SmtUtils]: Spent 6.50s on a formula simplification. DAG size of input: 198 DAG size of output: 122 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:45:31,894 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:45:47,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:45:51,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:45:53,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:46:00,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:46:25,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:46:27,756 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:46:29,764 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:46:45,057 WARN L233 SmtUtils]: Spent 11.37s on a formula simplification. DAG size of input: 186 DAG size of output: 112 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:46:55,806 WARN L233 SmtUtils]: Spent 6.41s on a formula simplification. DAG size of input: 137 DAG size of output: 113 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:46:58,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:47:04,216 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:47:07,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:47:09,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:47:12,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:47:14,700 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:47:28,448 WARN L233 SmtUtils]: Spent 8.67s on a formula simplification. DAG size of input: 133 DAG size of output: 122 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:47:48,685 WARN L233 SmtUtils]: Spent 5.12s on a formula simplification. DAG size of input: 198 DAG size of output: 88 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:48:13,494 WARN L233 SmtUtils]: Spent 14.54s on a formula simplification. DAG size of input: 184 DAG size of output: 112 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:48:34,881 WARN L233 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 134 DAG size of output: 123 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:48:41,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:48:43,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:48:45,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:49:01,311 WARN L233 SmtUtils]: Spent 7.19s on a formula simplification. DAG size of input: 196 DAG size of output: 157 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-12-13 18:49:22,065 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 18:49:24,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-12-13 18:49:27,829 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0, 1] [2022-12-13 18:49:40,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:49:43,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-12-13 18:50:01,453 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:50:03,557 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:50:06,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:50:08,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:50:09,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2022-12-13 18:50:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:50:09,963 INFO L93 Difference]: Finished difference Result 195 states and 242 transitions. [2022-12-13 18:50:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-12-13 18:50:09,963 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.8548387096774193) internal successors, (115), 62 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-12-13 18:50:09,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:50:09,964 INFO L225 Difference]: With dead ends: 195 [2022-12-13 18:50:09,964 INFO L226 Difference]: Without dead ends: 191 [2022-12-13 18:50:09,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6234 ImplicationChecksByTransitivity, 360.0s TimeCoverageRelationStatistics Valid=2177, Invalid=19212, Unknown=73, NotChecked=0, Total=21462 [2022-12-13 18:50:09,968 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 304 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 2572 mSolverCounterSat, 366 mSolverCounterUnsat, 46 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 2984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 2572 IncrementalHoareTripleChecker+Invalid, 46 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 99.4s IncrementalHoareTripleChecker+Time [2022-12-13 18:50:09,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [304 Valid, 314 Invalid, 2984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 2572 Invalid, 46 Unknown, 0 Unchecked, 99.4s Time] [2022-12-13 18:50:09,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-12-13 18:50:10,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 123. [2022-12-13 18:50:10,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.2622950819672132) internal successors, (154), 122 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:50:10,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 154 transitions. [2022-12-13 18:50:10,009 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 154 transitions. Word has length 45 [2022-12-13 18:50:10,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:50:10,009 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 154 transitions. [2022-12-13 18:50:10,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.8548387096774193) internal successors, (115), 62 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:50:10,009 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 154 transitions. [2022-12-13 18:50:10,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 18:50:10,009 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:50:10,009 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:50:10,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-12-13 18:50:10,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-13 18:50:10,211 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:50:10,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:50:10,212 INFO L85 PathProgramCache]: Analyzing trace with hash -2054602352, now seen corresponding path program 3 times [2022-12-13 18:50:10,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:50:10,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078615803] [2022-12-13 18:50:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:50:10,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:50:10,261 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 18:50:10,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [68398251] [2022-12-13 18:50:10,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:50:10,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:50:10,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:50:10,264 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:50:10,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-12-13 18:50:10,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 18:50:10,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:50:10,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 22 conjunts are in the unsatisfiable core [2022-12-13 18:50:10,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:50:10,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-12-13 18:50:11,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:50:11,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 18:50:11,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:50:11,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 18:50:11,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:50:11,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-12-13 18:50:11,705 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:50:11,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-13 18:50:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-13 18:50:11,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:50:17,345 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:50:17,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 33 [2022-12-13 18:50:17,388 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2022-12-13 18:50:17,389 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 30 [2022-12-13 18:50:19,671 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-13 18:50:19,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:50:19,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078615803] [2022-12-13 18:50:19,671 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 18:50:19,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68398251] [2022-12-13 18:50:19,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68398251] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:50:19,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:50:19,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-12-13 18:50:19,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799119208] [2022-12-13 18:50:19,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:50:19,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-13 18:50:19,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:50:19,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-13 18:50:19,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=231, Unknown=5, NotChecked=0, Total=306 [2022-12-13 18:50:19,673 INFO L87 Difference]: Start difference. First operand 123 states and 154 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:50:22,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:50:22,065 INFO L93 Difference]: Finished difference Result 197 states and 250 transitions. [2022-12-13 18:50:22,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 18:50:22,067 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-12-13 18:50:22,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:50:22,067 INFO L225 Difference]: With dead ends: 197 [2022-12-13 18:50:22,067 INFO L226 Difference]: Without dead ends: 193 [2022-12-13 18:50:22,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=175, Invalid=470, Unknown=5, NotChecked=0, Total=650 [2022-12-13 18:50:22,068 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 50 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-13 18:50:22,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 41 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-13 18:50:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-12-13 18:50:22,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 174. [2022-12-13 18:50:22,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.2947976878612717) internal successors, (224), 173 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:50:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 224 transitions. [2022-12-13 18:50:22,148 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 224 transitions. Word has length 45 [2022-12-13 18:50:22,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:50:22,148 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 224 transitions. [2022-12-13 18:50:22,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:50:22,148 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 224 transitions. [2022-12-13 18:50:22,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 18:50:22,149 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:50:22,149 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:50:22,153 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-12-13 18:50:22,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:50:22,350 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:50:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:50:22,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1431802284, now seen corresponding path program 4 times [2022-12-13 18:50:22,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:50:22,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200545695] [2022-12-13 18:50:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:50:22,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:50:22,371 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 18:50:22,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646030011] [2022-12-13 18:50:22,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-13 18:50:22,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:50:22,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:50:22,372 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:50:22,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-12-13 18:50:22,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-13 18:50:22,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:50:22,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-13 18:50:22,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:50:22,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:50:23,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 17 [2022-12-13 18:50:23,459 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-12-13 18:50:23,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-12-13 18:50:23,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:50:24,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2022-12-13 18:50:24,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-12-13 18:50:24,414 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-12-13 18:50:24,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:50:24,979 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_880 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| v_ArrVal_880) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 8 |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-12-13 18:50:26,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 52 [2022-12-13 18:50:26,801 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:50:26,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 80 [2022-12-13 18:50:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 13 proven. 24 refuted. 0 times theorem prover too weak. 18 trivial. 5 not checked. [2022-12-13 18:50:27,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:50:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200545695] [2022-12-13 18:50:27,129 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 18:50:27,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646030011] [2022-12-13 18:50:27,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646030011] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:50:27,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:50:27,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2022-12-13 18:50:27,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748373341] [2022-12-13 18:50:27,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:50:27,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-12-13 18:50:27,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:50:27,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-12-13 18:50:27,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=344, Unknown=2, NotChecked=38, Total=462 [2022-12-13 18:50:27,132 INFO L87 Difference]: Start difference. First operand 174 states and 224 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:50:29,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:50:29,684 INFO L93 Difference]: Finished difference Result 207 states and 271 transitions. [2022-12-13 18:50:29,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 18:50:29,685 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-12-13 18:50:29,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:50:29,686 INFO L225 Difference]: With dead ends: 207 [2022-12-13 18:50:29,686 INFO L226 Difference]: Without dead ends: 167 [2022-12-13 18:50:29,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=94, Invalid=414, Unknown=2, NotChecked=42, Total=552 [2022-12-13 18:50:29,687 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-13 18:50:29,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 61 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 388 Invalid, 0 Unknown, 43 Unchecked, 2.0s Time] [2022-12-13 18:50:29,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-12-13 18:50:29,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2022-12-13 18:50:29,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.2378048780487805) internal successors, (203), 164 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:50:29,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 203 transitions. [2022-12-13 18:50:29,768 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 203 transitions. Word has length 45 [2022-12-13 18:50:29,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:50:29,768 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 203 transitions. [2022-12-13 18:50:29,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:50:29,769 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 203 transitions. [2022-12-13 18:50:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-12-13 18:50:29,769 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:50:29,769 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:50:29,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-12-13 18:50:29,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:50:29,970 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:50:29,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:50:29,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1422716494, now seen corresponding path program 3 times [2022-12-13 18:50:29,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:50:29,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727848187] [2022-12-13 18:50:29,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:50:29,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:50:30,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-12-13 18:50:30,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217470277] [2022-12-13 18:50:30,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 18:50:30,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:50:30,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:50:30,013 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:50:30,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-12-13 18:50:30,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 18:50:30,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:50:30,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 34 conjunts are in the unsatisfiable core [2022-12-13 18:50:30,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:50:30,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-13 18:50:31,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 18:50:31,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 26 [2022-12-13 18:50:31,550 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-12-13 18:50:31,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 34 [2022-12-13 18:50:32,062 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-12-13 18:50:32,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 47 [2022-12-13 18:50:32,591 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-13 18:50:32,592 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 32 [2022-12-13 18:50:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-13 18:50:34,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:51:04,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-12-13 18:51:04,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 62 [2022-12-13 18:51:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 29 proven. 22 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-12-13 18:51:04,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:51:04,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727848187] [2022-12-13 18:51:04,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-12-13 18:51:04,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217470277] [2022-12-13 18:51:04,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217470277] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:51:04,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-13 18:51:04,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 36 [2022-12-13 18:51:04,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508245153] [2022-12-13 18:51:04,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-13 18:51:04,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-12-13 18:51:04,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:51:04,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-12-13 18:51:04,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=979, Unknown=5, NotChecked=0, Total=1260 [2022-12-13 18:51:04,136 INFO L87 Difference]: Start difference. First operand 165 states and 203 transitions. Second operand has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:16,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:51:16,240 INFO L93 Difference]: Finished difference Result 169 states and 206 transitions. [2022-12-13 18:51:16,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-12-13 18:51:16,241 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-12-13 18:51:16,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:51:16,241 INFO L225 Difference]: With dead ends: 169 [2022-12-13 18:51:16,242 INFO L226 Difference]: Without dead ends: 120 [2022-12-13 18:51:16,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=759, Invalid=2658, Unknown=5, NotChecked=0, Total=3422 [2022-12-13 18:51:16,243 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 126 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:51:16,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 45 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-12-13 18:51:16,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-12-13 18:51:16,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2022-12-13 18:51:16,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.205128205128205) internal successors, (141), 117 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:16,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 141 transitions. [2022-12-13 18:51:16,300 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 141 transitions. Word has length 45 [2022-12-13 18:51:16,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:51:16,300 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 141 transitions. [2022-12-13 18:51:16,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0833333333333335) internal successors, (75), 36 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:16,300 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 141 transitions. [2022-12-13 18:51:16,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-12-13 18:51:16,301 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:51:16,301 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:51:16,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-12-13 18:51:16,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-12-13 18:51:16,502 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:51:16,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:16,503 INFO L85 PathProgramCache]: Analyzing trace with hash -220752601, now seen corresponding path program 11 times [2022-12-13 18:51:16,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:51:16,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689062109] [2022-12-13 18:51:16,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:51:16,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:51:16,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:51:17,127 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 18:51:17,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:51:17,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689062109] [2022-12-13 18:51:17,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689062109] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:51:17,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741219323] [2022-12-13 18:51:17,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-12-13 18:51:17,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:51:17,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:51:17,130 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:51:17,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-12-13 18:51:17,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-12-13 18:51:17,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:51:17,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 18:51:17,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:51:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 18:51:18,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:51:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 35 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-12-13 18:51:19,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741219323] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:51:19,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:51:19,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-12-13 18:51:19,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082927747] [2022-12-13 18:51:19,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:51:19,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 18:51:19,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:51:19,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 18:51:19,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-12-13 18:51:19,317 INFO L87 Difference]: Start difference. First operand 118 states and 141 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:21,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:51:21,119 INFO L93 Difference]: Finished difference Result 172 states and 203 transitions. [2022-12-13 18:51:21,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-13 18:51:21,120 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2022-12-13 18:51:21,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:51:21,121 INFO L225 Difference]: With dead ends: 172 [2022-12-13 18:51:21,121 INFO L226 Difference]: Without dead ends: 84 [2022-12-13 18:51:21,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2022-12-13 18:51:21,122 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 130 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:51:21,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 34 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-13 18:51:21,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-13 18:51:21,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2022-12-13 18:51:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-12-13 18:51:21,152 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 48 [2022-12-13 18:51:21,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:51:21,152 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-12-13 18:51:21,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:21,152 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-12-13 18:51:21,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-12-13 18:51:21,152 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:51:21,152 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:51:21,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-12-13 18:51:21,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-12-13 18:51:21,354 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:51:21,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:21,355 INFO L85 PathProgramCache]: Analyzing trace with hash 730479788, now seen corresponding path program 12 times [2022-12-13 18:51:21,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:51:21,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996858133] [2022-12-13 18:51:21,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:51:21,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:51:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:51:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-13 18:51:22,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:51:22,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996858133] [2022-12-13 18:51:22,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996858133] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:51:22,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470563650] [2022-12-13 18:51:22,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-12-13 18:51:22,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:51:22,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:51:22,172 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:51:22,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-12-13 18:51:22,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-12-13 18:51:22,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 18:51:22,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-13 18:51:22,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:51:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 18:51:23,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:51:24,359 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-12-13 18:51:24,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470563650] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:51:24,360 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:51:24,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-12-13 18:51:24,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224046422] [2022-12-13 18:51:24,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:51:24,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 18:51:24,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:51:24,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 18:51:24,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2022-12-13 18:51:24,362 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:26,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 18:51:26,482 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2022-12-13 18:51:26,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-12-13 18:51:26,483 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-12-13 18:51:26,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 18:51:26,484 INFO L225 Difference]: With dead ends: 83 [2022-12-13 18:51:26,484 INFO L226 Difference]: Without dead ends: 79 [2022-12-13 18:51:26,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=206, Invalid=664, Unknown=0, NotChecked=0, Total=870 [2022-12-13 18:51:26,485 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 134 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-12-13 18:51:26,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 29 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-12-13 18:51:26,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-13 18:51:26,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 65. [2022-12-13 18:51:26,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.171875) internal successors, (75), 64 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:26,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2022-12-13 18:51:26,512 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 50 [2022-12-13 18:51:26,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 18:51:26,512 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2022-12-13 18:51:26,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 18:51:26,512 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2022-12-13 18:51:26,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-12-13 18:51:26,513 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 18:51:26,513 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 18:51:26,518 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-12-13 18:51:26,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:51:26,714 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 18:51:26,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 18:51:26,714 INFO L85 PathProgramCache]: Analyzing trace with hash 663114381, now seen corresponding path program 13 times [2022-12-13 18:51:26,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 18:51:26,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518725601] [2022-12-13 18:51:26,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 18:51:26,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 18:51:26,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:51:32,690 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-12-13 18:51:32,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 18:51:32,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518725601] [2022-12-13 18:51:32,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518725601] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 18:51:32,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986657489] [2022-12-13 18:51:32,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-13 18:51:32,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 18:51:32,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 18:51:32,692 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 18:51:32,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_40045c55-92ef-47d6-bc58-999d9050d453/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-12-13 18:51:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 18:51:32,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 86 conjunts are in the unsatisfiable core [2022-12-13 18:51:32,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 18:51:33,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-12-13 18:51:33,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-12-13 18:51:33,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:51:34,260 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:51:34,686 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:51:35,134 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:51:35,570 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:51:36,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:51:36,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:51:36,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:51:37,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:51:37,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-12-13 18:51:37,852 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2022-12-13 18:51:38,857 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 18:51:38,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 41 [2022-12-13 18:51:39,850 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 18:51:39,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-12-13 18:51:40,913 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 18:51:40,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2022-12-13 18:51:41,969 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 18:51:41,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 43 [2022-12-13 18:51:42,626 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-12-13 18:51:42,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 32 [2022-12-13 18:51:43,027 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2022-12-13 18:51:43,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 18:52:20,749 WARN L837 $PredicateComparison]: unable to prove that (let ((.cse6 (* c_~N~0 5))) (and (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_1174 (Array Int Int))) (let ((.cse0 (select v_ArrVal_1174 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= 5 .cse0)) (forall ((v_subst_20 Int)) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_1174))) (let ((.cse8 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse2 (select .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse5 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse0))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_20 4))))) (or (forall ((v_subst_17 Int)) (let ((.cse4 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse0 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_17 4))))) (or (forall ((v_subst_15 Int)) (let ((.cse3 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse4 .cse0 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_15 4))))) (or (forall ((v_subst_13 Int)) (let ((.cse1 (select (select (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse8 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse2 .cse3 .cse4 .cse0 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* v_subst_13 4) |ULTIMATE.start_main_~a~0#1.offset|)))) (or (not (= .cse1 5)) (<= (+ .cse1 .cse2 .cse3 .cse4 .cse0 .cse5) .cse6)))) (not (= 5 .cse3))))) (not (= 5 .cse4))))) (not (= 5 .cse5))))))))))) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|ULTIMATE.start_main_~a~0#1.offset| Int) (v_ArrVal_1174 (Array Int Int))) (let ((.cse9 (select v_ArrVal_1174 (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))))) (or (not (= 5 .cse9)) (forall ((v_subst_19 Int)) (let ((.cse15 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| v_ArrVal_1174))) (let ((.cse16 (select .cse15 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse13 (select .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset|))) (let ((.cse14 (select (select (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse9))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_19 4))))) (or (forall ((v_subst_18 Int)) (let ((.cse10 (select (select (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse9 .cse14))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_18 4))))) (or (not (= 5 .cse10)) (forall ((v_subst_16 Int)) (let ((.cse12 (select (select (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse13 .cse9 .cse14 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_16 4))))) (or (forall ((v_subst_14 Int)) (let ((.cse11 (select (select (store .cse15 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse16 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse12 .cse13 .cse9 .cse14 .cse10))) |c_ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* v_subst_14 4))))) (or (not (= 5 .cse11)) (<= .cse6 (+ .cse12 .cse13 .cse11 .cse9 .cse14 .cse10))))) (not (= .cse12 5)))))))) (not (= 5 .cse14))))))))))))) is different from false [2022-12-13 18:53:12,111 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-12-13 18:53:12,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 3823 treesize of output 1 [2022-12-13 18:53:12,117 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 26 trivial. 9 not checked. [2022-12-13 18:53:12,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986657489] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 18:53:12,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 18:53:12,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 22] total 64 [2022-12-13 18:53:12,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046586275] [2022-12-13 18:53:12,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 18:53:12,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-12-13 18:53:12,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 18:53:12,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-12-13 18:53:12,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=3644, Unknown=14, NotChecked=122, Total=4032 [2022-12-13 18:53:12,119 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand has 64 states, 64 states have (on average 1.71875) internal successors, (110), 64 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)