./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/rewnif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/rewnif.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc --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 5ee21d1db2a363655b71bcb8ab92ef8d6b86a57a4ebbd79d98cb55c59d3ed1f5 --- 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-5e519f3 [2022-11-02 20:40:38,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:40:38,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:40:39,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:40:39,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:40:39,050 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:40:39,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:40:39,059 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:40:39,061 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:40:39,065 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:40:39,066 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:40:39,070 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:40:39,070 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:40:39,077 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:40:39,079 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:40:39,080 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:40:39,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:40:39,083 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:40:39,085 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:40:39,094 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:40:39,097 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:40:39,099 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:40:39,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:40:39,104 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:40:39,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:40:39,115 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:40:39,116 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:40:39,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:40:39,119 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:40:39,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:40:39,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:40:39,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:40:39,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:40:39,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:40:39,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:40:39,129 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:40:39,130 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:40:39,130 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:40:39,131 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:40:39,132 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:40:39,133 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:40:39,134 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:40:39,198 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:40:39,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:40:39,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:40:39,199 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:40:39,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:40:39,200 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:40:39,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:40:39,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:40:39,201 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:40:39,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:40:39,202 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:40:39,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:40:39,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:40:39,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:40:39,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:40:39,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:40:39,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:40:39,204 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:40:39,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:40:39,205 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:40:39,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:40:39,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:40:39,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:40:39,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:40:39,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:40:39,219 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:40:39,219 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:40:39,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:40:39,220 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:40:39,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:40:39,220 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:40:39,221 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:40:39,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:40:39,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5ee21d1db2a363655b71bcb8ab92ef8d6b86a57a4ebbd79d98cb55c59d3ed1f5 [2022-11-02 20:40:39,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:40:39,604 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:40:39,607 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:40:39,609 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:40:39,611 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:40:39,612 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/array-tiling/rewnif.c [2022-11-02 20:40:39,692 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/data/de771b583/5f40c0ac3a6d481a804e3a6e20376a89/FLAGebe52ef49 [2022-11-02 20:40:40,371 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:40:40,372 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/sv-benchmarks/c/array-tiling/rewnif.c [2022-11-02 20:40:40,380 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/data/de771b583/5f40c0ac3a6d481a804e3a6e20376a89/FLAGebe52ef49 [2022-11-02 20:40:40,714 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/data/de771b583/5f40c0ac3a6d481a804e3a6e20376a89 [2022-11-02 20:40:40,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:40:40,719 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:40:40,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:40:40,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:40:40,731 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:40:40,733 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:40:40" (1/1) ... [2022-11-02 20:40:40,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@188ccbc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:40, skipping insertion in model container [2022-11-02 20:40:40,735 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:40:40" (1/1) ... [2022-11-02 20:40:40,744 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:40:40,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:40:40,991 WARN L230 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_7aabc836-a263-4981-b42d-e276dad7617e/sv-benchmarks/c/array-tiling/rewnif.c[397,410] [2022-11-02 20:40:41,011 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:40:41,022 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:40:41,037 WARN L230 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_7aabc836-a263-4981-b42d-e276dad7617e/sv-benchmarks/c/array-tiling/rewnif.c[397,410] [2022-11-02 20:40:41,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:40:41,061 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:40:41,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:41 WrapperNode [2022-11-02 20:40:41,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:40:41,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:40:41,064 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:40:41,064 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:40:41,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:41" (1/1) ... [2022-11-02 20:40:41,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:41" (1/1) ... [2022-11-02 20:40:41,121 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 49 [2022-11-02 20:40:41,122 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:40:41,124 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:40:41,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:40:41,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:40:41,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:41" (1/1) ... [2022-11-02 20:40:41,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:41" (1/1) ... [2022-11-02 20:40:41,154 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:41" (1/1) ... [2022-11-02 20:40:41,154 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:41" (1/1) ... [2022-11-02 20:40:41,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:41" (1/1) ... [2022-11-02 20:40:41,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:41" (1/1) ... [2022-11-02 20:40:41,178 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:41" (1/1) ... [2022-11-02 20:40:41,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:41" (1/1) ... [2022-11-02 20:40:41,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:40:41,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:40:41,186 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:40:41,187 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:40:41,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:41" (1/1) ... [2022-11-02 20:40:41,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:40:41,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:41,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:40:41,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:40:41,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:40:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:40:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:40:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-02 20:40:41,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:40:41,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:40:41,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:40:41,421 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:40:41,424 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:40:41,579 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:40:41,586 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:40:41,586 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:40:41,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:40:41 BoogieIcfgContainer [2022-11-02 20:40:41,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:40:41,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:40:41,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:40:41,596 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:40:41,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:40:40" (1/3) ... [2022-11-02 20:40:41,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a486ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:40:41, skipping insertion in model container [2022-11-02 20:40:41,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:40:41" (2/3) ... [2022-11-02 20:40:41,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a486ad6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:40:41, skipping insertion in model container [2022-11-02 20:40:41,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:40:41" (3/3) ... [2022-11-02 20:40:41,600 INFO L112 eAbstractionObserver]: Analyzing ICFG rewnif.c [2022-11-02 20:40:41,624 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:40:41,624 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:40:41,726 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:40:41,735 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;@42d29d35, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:40:41,750 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:40:41,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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) [2022-11-02 20:40:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:40:41,776 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:41,777 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:41,778 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:41,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:41,794 INFO L85 PathProgramCache]: Analyzing trace with hash 133671584, now seen corresponding path program 1 times [2022-11-02 20:40:41,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:41,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719278574] [2022-11-02 20:40:41,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:41,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:41,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:42,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:42,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719278574] [2022-11-02 20:40:42,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719278574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:42,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:42,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:40:42,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656503744] [2022-11-02 20:40:42,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:42,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:40:42,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:42,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:40:42,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:40:42,160 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-11-02 20:40:42,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:42,184 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-11-02 20:40:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:40:42,187 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 8 [2022-11-02 20:40:42,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:42,198 INFO L225 Difference]: With dead ends: 29 [2022-11-02 20:40:42,199 INFO L226 Difference]: Without dead ends: 14 [2022-11-02 20:40:42,203 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 [2022-11-02 20:40:42,208 INFO L413 NwaCegarLoop]: 21 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, 21 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 [2022-11-02 20:40:42,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:40:42,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-11-02 20:40:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-11-02 20:40:42,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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) [2022-11-02 20:40:42,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-02 20:40:42,248 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-11-02 20:40:42,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:42,249 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-02 20:40:42,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2022-11-02 20:40:42,249 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-02 20:40:42,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 20:40:42,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:42,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:42,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:40:42,251 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:42,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:42,253 INFO L85 PathProgramCache]: Analyzing trace with hash 121665811, now seen corresponding path program 1 times [2022-11-02 20:40:42,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:42,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514186316] [2022-11-02 20:40:42,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:42,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:42,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:42,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514186316] [2022-11-02 20:40:42,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514186316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:40:42,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:40:42,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:40:42,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273139011] [2022-11-02 20:40:42,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:40:42,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:40:42,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:42,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:40:42,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:40:42,414 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-02 20:40:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:42,465 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-11-02 20:40:42,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:40:42,466 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2022-11-02 20:40:42,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:42,467 INFO L225 Difference]: With dead ends: 29 [2022-11-02 20:40:42,467 INFO L226 Difference]: Without dead ends: 18 [2022-11-02 20:40:42,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:40:42,469 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:42,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:40:42,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-02 20:40:42,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2022-11-02 20:40:42,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 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) [2022-11-02 20:40:42,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-11-02 20:40:42,477 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-11-02 20:40:42,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:42,477 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-11-02 20:40:42,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2022-11-02 20:40:42,478 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-11-02 20:40:42,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:40:42,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:42,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:42,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:40:42,480 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:42,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:42,481 INFO L85 PathProgramCache]: Analyzing trace with hash 729197006, now seen corresponding path program 1 times [2022-11-02 20:40:42,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:42,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551569318] [2022-11-02 20:40:42,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:42,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:42,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:42,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551569318] [2022-11-02 20:40:42,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551569318] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:42,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812585526] [2022-11-02 20:40:42,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:42,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:42,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:42,709 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:42,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:40:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:42,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:40:42,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:43,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:43,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812585526] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:43,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:40:43,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-02 20:40:43,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136944742] [2022-11-02 20:40:43,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:43,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 20:40:43,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:43,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 20:40:43,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:40:43,095 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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) [2022-11-02 20:40:43,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:43,206 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-11-02 20:40:43,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:40:43,207 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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) Word has length 12 [2022-11-02 20:40:43,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:43,208 INFO L225 Difference]: With dead ends: 34 [2022-11-02 20:40:43,211 INFO L226 Difference]: Without dead ends: 27 [2022-11-02 20:40:43,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:40:43,213 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:43,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 22 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:40:43,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-02 20:40:43,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-11-02 20:40:43,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 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) [2022-11-02 20:40:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-11-02 20:40:43,230 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-11-02 20:40:43,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:43,231 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-11-02 20:40:43,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 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) [2022-11-02 20:40:43,232 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-11-02 20:40:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 20:40:43,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:43,235 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:43,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:43,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:43,451 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:43,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:43,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1021157689, now seen corresponding path program 1 times [2022-11-02 20:40:43,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:43,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498577885] [2022-11-02 20:40:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:43,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:44,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:44,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:44,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498577885] [2022-11-02 20:40:44,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498577885] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:44,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085813174] [2022-11-02 20:40:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:44,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:44,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:44,112 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:44,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:40:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:44,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:40:44,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:44,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:40:44,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:40:44,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 22 [2022-11-02 20:40:44,458 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:40:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:44,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:46,777 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_23| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_23|)) (forall ((v_ArrVal_36 Int)) (< 0 (+ (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_23| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_36) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))))) is different from false [2022-11-02 20:40:46,808 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 21 [2022-11-02 20:40:46,817 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 142 treesize of output 138 [2022-11-02 20:40:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2022-11-02 20:40:46,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085813174] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:46,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:40:46,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 16 [2022-11-02 20:40:46,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139234885] [2022-11-02 20:40:46,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:46,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:40:46,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:46,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:40:46,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=159, Unknown=1, NotChecked=26, Total=240 [2022-11-02 20:40:46,917 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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) [2022-11-02 20:40:48,963 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_23| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_23|)) (forall ((v_ArrVal_36 Int)) (< 0 (+ (select (store .cse0 (+ (* |v_ULTIMATE.start_main_~i~0#1_23| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_36) |c_ULTIMATE.start_main_~a~0#1.offset|) 1))))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) 0))) is different from false [2022-11-02 20:40:49,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:49,222 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-11-02 20:40:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:40:49,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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 16 [2022-11-02 20:40:49,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:49,224 INFO L225 Difference]: With dead ends: 28 [2022-11-02 20:40:49,224 INFO L226 Difference]: Without dead ends: 26 [2022-11-02 20:40:49,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=108, Invalid=278, Unknown=2, NotChecked=74, Total=462 [2022-11-02 20:40:49,227 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 43 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:49,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 40 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 93 Invalid, 0 Unknown, 28 Unchecked, 0.1s Time] [2022-11-02 20:40:49,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-02 20:40:49,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-11-02 20:40:49,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.15) internal successors, (23), 20 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) [2022-11-02 20:40:49,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2022-11-02 20:40:49,234 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2022-11-02 20:40:49,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:49,235 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2022-11-02 20:40:49,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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) [2022-11-02 20:40:49,235 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2022-11-02 20:40:49,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 20:40:49,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:49,236 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:49,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:49,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:49,451 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:49,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1566850755, now seen corresponding path program 1 times [2022-11-02 20:40:49,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:49,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410277791] [2022-11-02 20:40:49,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:49,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:49,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:49,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410277791] [2022-11-02 20:40:49,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410277791] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:49,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062147627] [2022-11-02 20:40:49,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:49,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:49,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:49,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:49,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:40:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:49,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:40:50,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:50,039 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:40:50,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:40:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:50,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:50,265 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:40:50,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 20 [2022-11-02 20:40:50,313 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:50,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062147627] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:50,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:40:50,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-11-02 20:40:50,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363056633] [2022-11-02 20:40:50,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:50,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:40:50,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:50,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:40:50,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:40:50,317 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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) [2022-11-02 20:40:50,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:50,641 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-11-02 20:40:50,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:40:50,642 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 20 [2022-11-02 20:40:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:50,643 INFO L225 Difference]: With dead ends: 60 [2022-11-02 20:40:50,644 INFO L226 Difference]: Without dead ends: 58 [2022-11-02 20:40:50,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:40:50,646 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:50,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 72 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:40:50,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-02 20:40:50,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 37. [2022-11-02 20:40:50,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 36 states have internal predecessors, (42), 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) [2022-11-02 20:40:50,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2022-11-02 20:40:50,657 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 20 [2022-11-02 20:40:50,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:50,658 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2022-11-02 20:40:50,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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) [2022-11-02 20:40:50,658 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2022-11-02 20:40:50,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-11-02 20:40:50,659 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:50,659 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:50,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:50,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:50,876 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:50,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:50,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1995245389, now seen corresponding path program 2 times [2022-11-02 20:40:50,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:50,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951470955] [2022-11-02 20:40:50,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:50,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:50,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:51,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:51,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:51,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951470955] [2022-11-02 20:40:51,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951470955] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:51,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89480202] [2022-11-02 20:40:51,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:40:51,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:51,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:51,007 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:51,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:40:51,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:40:51,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:40:51,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:40:51,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:51,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:51,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89480202] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:51,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:40:51,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-11-02 20:40:51,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252061842] [2022-11-02 20:40:51,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:51,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 20:40:51,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:51,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 20:40:51,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-11-02 20:40:51,310 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2022-11-02 20:40:51,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:51,456 INFO L93 Difference]: Finished difference Result 85 states and 95 transitions. [2022-11-02 20:40:51,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:40:51,457 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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 24 [2022-11-02 20:40:51,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:51,459 INFO L225 Difference]: With dead ends: 85 [2022-11-02 20:40:51,459 INFO L226 Difference]: Without dead ends: 47 [2022-11-02 20:40:51,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:40:51,463 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:51,464 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 38 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:40:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-02 20:40:51,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-11-02 20:40:51,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 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) [2022-11-02 20:40:51,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-11-02 20:40:51,485 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 24 [2022-11-02 20:40:51,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:51,485 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-11-02 20:40:51,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 13 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) [2022-11-02 20:40:51,486 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-11-02 20:40:51,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:40:51,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:51,488 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:51,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:51,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:51,707 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:51,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:51,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1364521933, now seen corresponding path program 3 times [2022-11-02 20:40:51,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:51,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897292739] [2022-11-02 20:40:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:51,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:51,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:52,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:52,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897292739] [2022-11-02 20:40:52,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897292739] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:52,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801573560] [2022-11-02 20:40:52,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:40:52,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:52,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:52,448 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:52,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:40:52,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-02 20:40:52,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:40:52,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:40:52,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:52,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:40:52,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:40:52,720 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 25 [2022-11-02 20:40:52,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:40:52,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:40:52,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:40:52,815 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:40:52,960 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:40:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:52,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:53,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 19 [2022-11-02 20:40:53,233 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 25 [2022-11-02 20:40:53,264 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:40:53,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801573560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:53,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:40:53,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 21 [2022-11-02 20:40:53,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733244321] [2022-11-02 20:40:53,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:53,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:40:53,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:53,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:40:53,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:40:53,269 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 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) [2022-11-02 20:40:53,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:53,737 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2022-11-02 20:40:53,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:40:53,738 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 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 28 [2022-11-02 20:40:53,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:53,739 INFO L225 Difference]: With dead ends: 55 [2022-11-02 20:40:53,739 INFO L226 Difference]: Without dead ends: 53 [2022-11-02 20:40:53,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:40:53,740 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 60 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:53,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 104 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:40:53,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-02 20:40:53,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 29. [2022-11-02 20:40:53,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 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) [2022-11-02 20:40:53,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-11-02 20:40:53,753 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 28 [2022-11-02 20:40:53,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:53,754 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-11-02 20:40:53,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 21 states have internal predecessors, (63), 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) [2022-11-02 20:40:53,754 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-11-02 20:40:53,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:40:53,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:53,756 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:53,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:53,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 20:40:53,959 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:53,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:53,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1191072622, now seen corresponding path program 4 times [2022-11-02 20:40:53,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:53,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981047920] [2022-11-02 20:40:53,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:53,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:54,353 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:54,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:54,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981047920] [2022-11-02 20:40:54,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981047920] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:54,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487624397] [2022-11-02 20:40:54,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:40:54,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:54,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:54,356 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:54,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:40:54,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:40:54,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:40:54,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:40:54,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:54,590 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:40:54,961 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-02 20:40:54,962 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 [2022-11-02 20:40:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:55,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:55,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 18 [2022-11-02 20:40:55,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-11-02 20:40:55,496 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:55,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487624397] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:55,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:40:55,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-11-02 20:40:55,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234482103] [2022-11-02 20:40:55,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:55,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 20:40:55,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:55,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 20:40:55,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:40:55,500 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 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) [2022-11-02 20:40:56,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:56,009 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-11-02 20:40:56,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:40:56,010 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 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 28 [2022-11-02 20:40:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:56,011 INFO L225 Difference]: With dead ends: 70 [2022-11-02 20:40:56,011 INFO L226 Difference]: Without dead ends: 51 [2022-11-02 20:40:56,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:40:56,013 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:56,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 103 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 209 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-11-02 20:40:56,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-02 20:40:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2022-11-02 20:40:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 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) [2022-11-02 20:40:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-11-02 20:40:56,024 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 28 [2022-11-02 20:40:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:56,024 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-11-02 20:40:56,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.68) internal successors, (67), 25 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) [2022-11-02 20:40:56,025 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-11-02 20:40:56,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:40:56,026 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:56,026 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:56,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:56,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:56,239 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:56,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:56,239 INFO L85 PathProgramCache]: Analyzing trace with hash 367413348, now seen corresponding path program 5 times [2022-11-02 20:40:56,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:56,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729411956] [2022-11-02 20:40:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:56,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:56,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:56,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:56,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729411956] [2022-11-02 20:40:56,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729411956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:56,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100510578] [2022-11-02 20:40:56,951 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:40:56,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:56,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:56,953 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:56,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:40:57,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-02 20:40:57,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:40:57,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:40:57,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:57,131 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:40:57,180 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:40:57,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 25 [2022-11-02 20:40:57,204 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:40:57,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-11-02 20:40:57,255 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:40:57,256 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-11-02 20:40:57,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:40:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:57,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:40:57,614 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 19 [2022-11-02 20:40:57,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 25 [2022-11-02 20:40:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:40:57,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100510578] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:40:57,663 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:40:57,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 19 [2022-11-02 20:40:57,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183549839] [2022-11-02 20:40:57,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:40:57,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 20:40:57,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:40:57,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 20:40:57,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:40:57,668 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 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) [2022-11-02 20:40:58,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:40:58,196 INFO L93 Difference]: Finished difference Result 67 states and 69 transitions. [2022-11-02 20:40:58,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 20:40:58,196 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 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 36 [2022-11-02 20:40:58,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:40:58,197 INFO L225 Difference]: With dead ends: 67 [2022-11-02 20:40:58,197 INFO L226 Difference]: Without dead ends: 65 [2022-11-02 20:40:58,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 57 SyntacticMatches, 11 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2022-11-02 20:40:58,199 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:40:58,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 141 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:40:58,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-02 20:40:58,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 37. [2022-11-02 20:40:58,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 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) [2022-11-02 20:40:58,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-11-02 20:40:58,214 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 36 [2022-11-02 20:40:58,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:40:58,219 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-11-02 20:40:58,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 19 states have internal predecessors, (59), 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) [2022-11-02 20:40:58,219 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-11-02 20:40:58,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 20:40:58,226 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:40:58,226 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:40:58,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:40:58,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:58,451 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:40:58,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:40:58,451 INFO L85 PathProgramCache]: Analyzing trace with hash 947747359, now seen corresponding path program 6 times [2022-11-02 20:40:58,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:40:58,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610525625] [2022-11-02 20:40:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:40:58,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:40:58,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:40:59,032 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:59,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:40:59,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610525625] [2022-11-02 20:40:59,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610525625] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:40:59,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965045699] [2022-11-02 20:40:59,033 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:40:59,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:40:59,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:40:59,034 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:40:59,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:40:59,155 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-02 20:40:59,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:40:59,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:40:59,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:40:59,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:40:59,722 INFO L356 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-02 20:40:59,722 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 [2022-11-02 20:40:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:40:59,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:00,195 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 18 [2022-11-02 20:41:00,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 34 treesize of output 28 [2022-11-02 20:41:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:00,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965045699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:00,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:00,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2022-11-02 20:41:00,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533452137] [2022-11-02 20:41:00,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:00,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 20:41:00,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:00,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 20:41:00,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2022-11-02 20:41:00,364 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 29 states, 29 states have (on average 3.0) internal successors, (87), 29 states have internal predecessors, (87), 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) [2022-11-02 20:41:01,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:01,128 INFO L93 Difference]: Finished difference Result 89 states and 93 transitions. [2022-11-02 20:41:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 20:41:01,129 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.0) internal successors, (87), 29 states have internal predecessors, (87), 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 36 [2022-11-02 20:41:01,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:01,130 INFO L225 Difference]: With dead ends: 89 [2022-11-02 20:41:01,130 INFO L226 Difference]: Without dead ends: 66 [2022-11-02 20:41:01,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=314, Invalid=1578, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 20:41:01,132 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 72 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:01,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 158 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 195 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-11-02 20:41:01,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-11-02 20:41:01,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 53. [2022-11-02 20:41:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 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) [2022-11-02 20:41:01,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-11-02 20:41:01,149 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 36 [2022-11-02 20:41:01,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:01,149 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-11-02 20:41:01,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.0) internal successors, (87), 29 states have internal predecessors, (87), 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) [2022-11-02 20:41:01,150 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-11-02 20:41:01,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 20:41:01,158 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:01,158 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:01,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:01,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 20:41:01,363 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:01,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:01,364 INFO L85 PathProgramCache]: Analyzing trace with hash -470542059, now seen corresponding path program 7 times [2022-11-02 20:41:01,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:01,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586371255] [2022-11-02 20:41:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:01,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:02,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:02,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586371255] [2022-11-02 20:41:02,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586371255] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:02,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253355966] [2022-11-02 20:41:02,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:41:02,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:02,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:02,217 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:02,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:41:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:02,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 20:41:02,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:02,412 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:02,494 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:41:02,495 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 25 [2022-11-02 20:41:02,518 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:41:02,518 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-11-02 20:41:02,583 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:41:02,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-11-02 20:41:02,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 3 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:02,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:05,107 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_108| Int)) (or (forall ((v_ArrVal_273 Int)) (<= 3 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_108| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_273) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_108|)))) is different from false [2022-11-02 20:41:05,277 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 20 treesize of output 18 [2022-11-02 20:41:05,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 24 [2022-11-02 20:41:05,344 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2022-11-02 20:41:05,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253355966] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:05,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:05,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 16] total 34 [2022-11-02 20:41:05,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23264053] [2022-11-02 20:41:05,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:05,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-02 20:41:05,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:05,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-02 20:41:05,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=921, Unknown=1, NotChecked=62, Total=1122 [2022-11-02 20:41:05,347 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 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) [2022-11-02 20:41:07,691 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (<= |c_ULTIMATE.start_main_~i~0#1| (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (<= 3 (select .cse0 12)) (<= (+ (div (- |c_ULTIMATE.start_main_~a~0#1.offset|) 4) 4) |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_108| Int)) (or (forall ((v_ArrVal_273 Int)) (<= 3 (select (store .cse0 (+ (* |v_ULTIMATE.start_main_~i~0#1_108| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_273) (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_108|)))))) is different from false [2022-11-02 20:41:09,807 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ 12 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (<= |c_ULTIMATE.start_main_~i~0#1| (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (<= 3 (select .cse0 12)) (<= 3 (select .cse0 .cse1)) (<= 5 |c_ULTIMATE.start_main_~i~0#1|) (<= (+ (div (- |c_ULTIMATE.start_main_~a~0#1.offset|) 4) 4) |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_108| Int)) (or (forall ((v_ArrVal_273 Int)) (<= 3 (select (store .cse0 (+ (* |v_ULTIMATE.start_main_~i~0#1_108| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_273) .cse1))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_108|)))))) is different from false [2022-11-02 20:41:10,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:10,219 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2022-11-02 20:41:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:41:10,220 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 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 44 [2022-11-02 20:41:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:10,221 INFO L225 Difference]: With dead ends: 79 [2022-11-02 20:41:10,221 INFO L226 Difference]: Without dead ends: 77 [2022-11-02 20:41:10,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 46 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=265, Invalid=1724, Unknown=3, NotChecked=264, Total=2256 [2022-11-02 20:41:10,224 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 72 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:10,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 210 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 576 Invalid, 0 Unknown, 53 Unchecked, 0.5s Time] [2022-11-02 20:41:10,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-02 20:41:10,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 45. [2022-11-02 20:41:10,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 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) [2022-11-02 20:41:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-11-02 20:41:10,237 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 44 [2022-11-02 20:41:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:10,237 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-11-02 20:41:10,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.1176470588235294) internal successors, (106), 34 states have internal predecessors, (106), 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) [2022-11-02 20:41:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-11-02 20:41:10,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 20:41:10,239 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:10,239 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:10,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:10,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:10,455 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:10,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1613367984, now seen corresponding path program 8 times [2022-11-02 20:41:10,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:10,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042421769] [2022-11-02 20:41:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:10,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:11,067 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:11,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:11,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042421769] [2022-11-02 20:41:11,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042421769] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:11,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633075894] [2022-11-02 20:41:11,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:41:11,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:11,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:11,069 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:11,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 20:41:11,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:41:11,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:11,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-02 20:41:11,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:11,263 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:11,462 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:11,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:11,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:11,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 20 [2022-11-02 20:41:11,740 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:11,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633075894] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:11,740 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:11,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 21 [2022-11-02 20:41:11,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558372472] [2022-11-02 20:41:11,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:11,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-02 20:41:11,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:11,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-02 20:41:11,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:41:11,743 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 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) [2022-11-02 20:41:12,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:12,470 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2022-11-02 20:41:12,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:41:12,470 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 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 44 [2022-11-02 20:41:12,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:12,471 INFO L225 Difference]: With dead ends: 96 [2022-11-02 20:41:12,471 INFO L226 Difference]: Without dead ends: 94 [2022-11-02 20:41:12,472 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 76 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=170, Invalid=1312, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 20:41:12,473 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 61 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:12,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 202 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:41:12,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-11-02 20:41:12,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 61. [2022-11-02 20:41:12,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 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) [2022-11-02 20:41:12,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-11-02 20:41:12,491 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 44 [2022-11-02 20:41:12,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:12,491 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-11-02 20:41:12,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 21 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) [2022-11-02 20:41:12,492 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-11-02 20:41:12,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-02 20:41:12,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:12,495 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:12,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:12,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 20:41:12,723 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:12,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:12,723 INFO L85 PathProgramCache]: Analyzing trace with hash 924773190, now seen corresponding path program 9 times [2022-11-02 20:41:12,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:12,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744624583] [2022-11-02 20:41:12,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:12,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:12,984 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:12,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:12,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744624583] [2022-11-02 20:41:12,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744624583] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:12,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007544939] [2022-11-02 20:41:12,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:41:12,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:12,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:12,987 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:13,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 20:41:13,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-02 20:41:13,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:13,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:41:13,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:13,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:13,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007544939] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:13,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:13,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2022-11-02 20:41:13,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53257506] [2022-11-02 20:41:13,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:13,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 20:41:13,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:13,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 20:41:13,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-11-02 20:41:13,708 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 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) [2022-11-02 20:41:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:13,957 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2022-11-02 20:41:13,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:41:13,958 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 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 48 [2022-11-02 20:41:13,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:13,959 INFO L225 Difference]: With dead ends: 114 [2022-11-02 20:41:13,959 INFO L226 Difference]: Without dead ends: 83 [2022-11-02 20:41:13,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:41:13,963 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 101 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:13,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 85 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:41:13,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-02 20:41:13,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2022-11-02 20:41:13,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 60 states have internal predecessors, (63), 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) [2022-11-02 20:41:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-11-02 20:41:13,998 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 48 [2022-11-02 20:41:13,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:13,999 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-11-02 20:41:14,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6363636363636362) internal successors, (80), 22 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) [2022-11-02 20:41:14,000 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-11-02 20:41:14,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:41:14,001 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:14,001 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:14,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:14,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:14,219 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:14,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:14,219 INFO L85 PathProgramCache]: Analyzing trace with hash 730938950, now seen corresponding path program 10 times [2022-11-02 20:41:14,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:14,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791349822] [2022-11-02 20:41:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:14,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:15,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:15,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791349822] [2022-11-02 20:41:15,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791349822] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:15,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21369763] [2022-11-02 20:41:15,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:41:15,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:15,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:15,101 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:15,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 20:41:15,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:41:15,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:15,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:41:15,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:15,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:15,475 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:41:15,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 25 [2022-11-02 20:41:15,500 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:41:15,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-11-02 20:41:15,555 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:41:15,555 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-11-02 20:41:15,773 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 3 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:15,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:16,100 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 19 [2022-11-02 20:41:16,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 25 [2022-11-02 20:41:16,196 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:41:16,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21369763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:16,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:16,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 25 [2022-11-02 20:41:16,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001939057] [2022-11-02 20:41:16,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:16,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 20:41:16,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:16,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 20:41:16,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:41:16,200 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 25 states have internal predecessors, (83), 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) [2022-11-02 20:41:17,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:17,058 INFO L93 Difference]: Finished difference Result 91 states and 93 transitions. [2022-11-02 20:41:17,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 20:41:17,059 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 25 states have internal predecessors, (83), 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 52 [2022-11-02 20:41:17,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:17,060 INFO L225 Difference]: With dead ends: 91 [2022-11-02 20:41:17,060 INFO L226 Difference]: Without dead ends: 89 [2022-11-02 20:41:17,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 87 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=189, Invalid=1371, Unknown=0, NotChecked=0, Total=1560 [2022-11-02 20:41:17,061 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 69 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:17,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 278 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-02 20:41:17,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-11-02 20:41:17,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 53. [2022-11-02 20:41:17,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 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) [2022-11-02 20:41:17,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2022-11-02 20:41:17,095 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 52 [2022-11-02 20:41:17,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:17,095 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2022-11-02 20:41:17,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 25 states have internal predecessors, (83), 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) [2022-11-02 20:41:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2022-11-02 20:41:17,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-11-02 20:41:17,096 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:17,097 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:17,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:17,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-02 20:41:17,323 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:17,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:17,323 INFO L85 PathProgramCache]: Analyzing trace with hash 778339585, now seen corresponding path program 11 times [2022-11-02 20:41:17,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:17,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599437759] [2022-11-02 20:41:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:17,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:18,045 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:18,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:18,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599437759] [2022-11-02 20:41:18,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599437759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:18,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760031754] [2022-11-02 20:41:18,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:41:18,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:18,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:18,051 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:18,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 20:41:18,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-11-02 20:41:18,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:18,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-02 20:41:18,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:18,328 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:18,562 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:18,603 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:18,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:18,742 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:18,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 20 [2022-11-02 20:41:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:18,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760031754] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:18,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:18,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 23 [2022-11-02 20:41:18,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023104895] [2022-11-02 20:41:18,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:18,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 20:41:18,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:18,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 20:41:18,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:41:18,854 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 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) [2022-11-02 20:41:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:19,771 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2022-11-02 20:41:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-11-02 20:41:19,772 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 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 52 [2022-11-02 20:41:19,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:19,773 INFO L225 Difference]: With dead ends: 108 [2022-11-02 20:41:19,773 INFO L226 Difference]: Without dead ends: 106 [2022-11-02 20:41:19,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=189, Invalid=1703, Unknown=0, NotChecked=0, Total=1892 [2022-11-02 20:41:19,774 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 74 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:19,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 242 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 20:41:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-11-02 20:41:19,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 69. [2022-11-02 20:41:19,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 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) [2022-11-02 20:41:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-11-02 20:41:19,793 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 52 [2022-11-02 20:41:19,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:19,793 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-11-02 20:41:19,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.4347826086956523) internal successors, (79), 23 states have internal predecessors, (79), 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) [2022-11-02 20:41:19,794 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-11-02 20:41:19,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-02 20:41:19,795 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:19,795 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:19,846 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:20,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-02 20:41:20,011 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:20,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:20,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1215546761, now seen corresponding path program 12 times [2022-11-02 20:41:20,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:20,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203165747] [2022-11-02 20:41:20,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:20,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:20,312 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:20,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:20,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203165747] [2022-11-02 20:41:20,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203165747] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:20,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384021841] [2022-11-02 20:41:20,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:41:20,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:20,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:20,314 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:20,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-02 20:41:20,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-02 20:41:20,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:20,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-02 20:41:20,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:21,027 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:21,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:21,260 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:21,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384021841] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:21,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:21,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2022-11-02 20:41:21,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239545189] [2022-11-02 20:41:21,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:21,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-02 20:41:21,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:21,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-02 20:41:21,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2022-11-02 20:41:21,262 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 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) [2022-11-02 20:41:21,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:21,581 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2022-11-02 20:41:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:41:21,582 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 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 56 [2022-11-02 20:41:21,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:21,583 INFO L225 Difference]: With dead ends: 130 [2022-11-02 20:41:21,583 INFO L226 Difference]: Without dead ends: 95 [2022-11-02 20:41:21,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 90 SyntacticMatches, 13 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=745, Unknown=0, NotChecked=0, Total=992 [2022-11-02 20:41:21,584 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 100 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:21,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 108 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:41:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-11-02 20:41:21,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 69. [2022-11-02 20:41:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 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) [2022-11-02 20:41:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-11-02 20:41:21,603 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 56 [2022-11-02 20:41:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:21,604 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-11-02 20:41:21,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.68) internal successors, (92), 25 states have internal predecessors, (92), 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) [2022-11-02 20:41:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-11-02 20:41:21,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-02 20:41:21,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:21,611 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:21,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:21,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-02 20:41:21,829 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:21,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:21,829 INFO L85 PathProgramCache]: Analyzing trace with hash -2011531273, now seen corresponding path program 13 times [2022-11-02 20:41:21,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:21,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886998384] [2022-11-02 20:41:21,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:21,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:22,732 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:22,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:22,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886998384] [2022-11-02 20:41:22,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886998384] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:22,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461263395] [2022-11-02 20:41:22,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:41:22,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:22,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:22,734 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:22,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-02 20:41:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:22,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-02 20:41:22,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:22,979 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:23,044 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:41:23,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 25 [2022-11-02 20:41:23,068 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:41:23,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-11-02 20:41:23,132 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:41:23,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-11-02 20:41:23,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 3 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:23,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:23,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 19 [2022-11-02 20:41:23,750 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 25 [2022-11-02 20:41:23,859 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:41:23,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461263395] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:23,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:23,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 19] total 28 [2022-11-02 20:41:23,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273745047] [2022-11-02 20:41:23,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:23,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:41:23,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:23,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:41:23,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:41:23,863 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 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) [2022-11-02 20:41:24,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:24,911 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2022-11-02 20:41:24,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-02 20:41:24,911 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 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 60 [2022-11-02 20:41:24,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:24,912 INFO L225 Difference]: With dead ends: 103 [2022-11-02 20:41:24,913 INFO L226 Difference]: Without dead ends: 101 [2022-11-02 20:41:24,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 102 SyntacticMatches, 11 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=211, Invalid=1769, Unknown=0, NotChecked=0, Total=1980 [2022-11-02 20:41:24,915 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 57 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:24,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 310 Invalid, 1029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 970 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:41:24,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-11-02 20:41:24,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 61. [2022-11-02 20:41:24,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 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) [2022-11-02 20:41:24,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-11-02 20:41:24,933 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 60 [2022-11-02 20:41:24,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:24,934 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-11-02 20:41:24,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.392857142857143) internal successors, (95), 28 states have internal predecessors, (95), 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) [2022-11-02 20:41:24,934 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-11-02 20:41:24,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-02 20:41:24,935 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:24,935 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:24,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:25,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-02 20:41:25,147 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:25,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:25,147 INFO L85 PathProgramCache]: Analyzing trace with hash -836376270, now seen corresponding path program 14 times [2022-11-02 20:41:25,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:25,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58697090] [2022-11-02 20:41:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:25,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:25,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:25,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58697090] [2022-11-02 20:41:25,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58697090] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:25,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365662036] [2022-11-02 20:41:25,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:41:25,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:25,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:25,859 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:25,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-02 20:41:25,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:41:25,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:25,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:41:25,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:26,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:26,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:26,480 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:26,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:26,640 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:26,644 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 20 [2022-11-02 20:41:26,752 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:26,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365662036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:26,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:26,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 27 [2022-11-02 20:41:26,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869865672] [2022-11-02 20:41:26,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:26,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-02 20:41:26,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:26,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-02 20:41:26,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-11-02 20:41:26,755 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 27 states have internal predecessors, (91), 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) [2022-11-02 20:41:27,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:27,881 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2022-11-02 20:41:27,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-02 20:41:27,882 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 27 states have internal predecessors, (91), 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 60 [2022-11-02 20:41:27,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:27,883 INFO L225 Difference]: With dead ends: 120 [2022-11-02 20:41:27,883 INFO L226 Difference]: Without dead ends: 118 [2022-11-02 20:41:27,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 106 SyntacticMatches, 6 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=222, Invalid=2328, Unknown=0, NotChecked=0, Total=2550 [2022-11-02 20:41:27,885 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 80 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:27,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 346 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:41:27,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-02 20:41:27,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 77. [2022-11-02 20:41:27,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 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) [2022-11-02 20:41:27,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-11-02 20:41:27,920 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 60 [2022-11-02 20:41:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:27,920 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-11-02 20:41:27,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3703703703703702) internal successors, (91), 27 states have internal predecessors, (91), 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) [2022-11-02 20:41:27,921 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-11-02 20:41:27,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-02 20:41:27,923 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:27,924 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:27,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:28,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-02 20:41:28,128 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:28,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:28,129 INFO L85 PathProgramCache]: Analyzing trace with hash 313400872, now seen corresponding path program 15 times [2022-11-02 20:41:28,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:28,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584844730] [2022-11-02 20:41:28,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:28,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:28,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:28,461 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:28,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:28,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584844730] [2022-11-02 20:41:28,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584844730] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:28,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054066105] [2022-11-02 20:41:28,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:41:28,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:28,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:28,479 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:28,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-02 20:41:28,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-11-02 20:41:28,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:28,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 20:41:28,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:29,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:29,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054066105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:29,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:29,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2022-11-02 20:41:29,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635551083] [2022-11-02 20:41:29,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:29,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:41:29,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:29,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:41:29,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:41:29,434 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 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) [2022-11-02 20:41:29,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:29,781 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2022-11-02 20:41:29,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:41:29,782 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 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 64 [2022-11-02 20:41:29,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:29,783 INFO L225 Difference]: With dead ends: 146 [2022-11-02 20:41:29,783 INFO L226 Difference]: Without dead ends: 107 [2022-11-02 20:41:29,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 103 SyntacticMatches, 15 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=309, Invalid=951, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:41:29,787 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 133 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:29,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 108 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:41:29,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-02 20:41:29,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 77. [2022-11-02 20:41:29,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 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) [2022-11-02 20:41:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-11-02 20:41:29,815 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 64 [2022-11-02 20:41:29,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:29,816 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-11-02 20:41:29,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 28 states have internal predecessors, (104), 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) [2022-11-02 20:41:29,816 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-11-02 20:41:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-02 20:41:29,817 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:29,817 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:29,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:30,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:30,043 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:30,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:30,043 INFO L85 PathProgramCache]: Analyzing trace with hash -846428632, now seen corresponding path program 16 times [2022-11-02 20:41:30,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:30,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496994785] [2022-11-02 20:41:30,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:30,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:31,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:31,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496994785] [2022-11-02 20:41:31,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496994785] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:31,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686255994] [2022-11-02 20:41:31,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:41:31,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:31,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:31,015 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:31,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-02 20:41:31,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:41:31,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:31,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-02 20:41:31,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:31,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:31,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 30 [2022-11-02 20:41:31,867 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 29 [2022-11-02 20:41:32,158 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:41:32,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 44 treesize of output 46 [2022-11-02 20:41:33,622 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:41:33,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 47 [2022-11-02 20:41:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:33,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:35,078 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 22 [2022-11-02 20:41:35,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 130 treesize of output 122 [2022-11-02 20:41:35,215 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 223 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:41:35,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686255994] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:35,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:35,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 22] total 55 [2022-11-02 20:41:35,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940508709] [2022-11-02 20:41:35,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:35,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-02 20:41:35,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:35,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-02 20:41:35,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2578, Unknown=0, NotChecked=0, Total=2970 [2022-11-02 20:41:35,226 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 55 states, 55 states have (on average 3.0727272727272728) internal successors, (169), 55 states have internal predecessors, (169), 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) [2022-11-02 20:41:39,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:39,754 INFO L93 Difference]: Finished difference Result 164 states and 173 transitions. [2022-11-02 20:41:39,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-11-02 20:41:39,755 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.0727272727272728) internal successors, (169), 55 states have internal predecessors, (169), 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 68 [2022-11-02 20:41:39,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:39,756 INFO L225 Difference]: With dead ends: 164 [2022-11-02 20:41:39,756 INFO L226 Difference]: Without dead ends: 162 [2022-11-02 20:41:39,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 115 SyntacticMatches, 9 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3641 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1385, Invalid=11725, Unknown=0, NotChecked=0, Total=13110 [2022-11-02 20:41:39,760 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 115 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 150 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:39,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 397 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 594 Invalid, 0 Unknown, 150 Unchecked, 0.5s Time] [2022-11-02 20:41:39,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-02 20:41:39,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 105. [2022-11-02 20:41:39,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 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) [2022-11-02 20:41:39,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-11-02 20:41:39,807 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 68 [2022-11-02 20:41:39,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:39,807 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-11-02 20:41:39,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.0727272727272728) internal successors, (169), 55 states have internal predecessors, (169), 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) [2022-11-02 20:41:39,808 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-11-02 20:41:39,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-02 20:41:39,809 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:39,810 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:39,863 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:40,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:40,035 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:40,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:40,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1199298343, now seen corresponding path program 17 times [2022-11-02 20:41:40,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:40,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942382211] [2022-11-02 20:41:40,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:40,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:40,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:41,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:41,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942382211] [2022-11-02 20:41:41,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942382211] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:41,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792361458] [2022-11-02 20:41:41,151 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:41:41,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:41,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:41,153 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:41,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-02 20:41:41,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-11-02 20:41:41,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:41,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 20:41:41,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:41,745 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:41,799 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:41:41,799 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 25 [2022-11-02 20:41:41,835 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:41:41,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-11-02 20:41:41,906 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:41:41,906 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-11-02 20:41:42,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:42,308 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 3 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:42,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:42,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 19 [2022-11-02 20:41:42,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 25 [2022-11-02 20:41:42,834 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:41:42,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792361458] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:42,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:42,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 33 [2022-11-02 20:41:42,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536205662] [2022-11-02 20:41:42,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:42,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 20:41:42,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:42,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 20:41:42,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=951, Unknown=0, NotChecked=0, Total=1056 [2022-11-02 20:41:42,837 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 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) [2022-11-02 20:41:44,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:44,206 INFO L93 Difference]: Finished difference Result 151 states and 154 transitions. [2022-11-02 20:41:44,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-02 20:41:44,207 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 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 76 [2022-11-02 20:41:44,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:44,208 INFO L225 Difference]: With dead ends: 151 [2022-11-02 20:41:44,208 INFO L226 Difference]: Without dead ends: 149 [2022-11-02 20:41:44,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 132 SyntacticMatches, 12 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=248, Invalid=2614, Unknown=0, NotChecked=0, Total=2862 [2022-11-02 20:41:44,211 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 71 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:44,212 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 436 Invalid, 1484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-02 20:41:44,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-02 20:41:44,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 105. [2022-11-02 20:41:44,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 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) [2022-11-02 20:41:44,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-11-02 20:41:44,250 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 76 [2022-11-02 20:41:44,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:44,250 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-11-02 20:41:44,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 33 states have internal predecessors, (117), 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) [2022-11-02 20:41:44,251 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-11-02 20:41:44,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-11-02 20:41:44,251 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:44,251 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:44,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:44,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:44,452 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:44,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:44,453 INFO L85 PathProgramCache]: Analyzing trace with hash 520499791, now seen corresponding path program 18 times [2022-11-02 20:41:44,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:44,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304228844] [2022-11-02 20:41:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:44,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:44,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:45,530 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:45,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:45,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304228844] [2022-11-02 20:41:45,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304228844] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:45,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855337130] [2022-11-02 20:41:45,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:41:45,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:45,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:45,535 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:45,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-02 20:41:46,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-02 20:41:46,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:46,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-02 20:41:46,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:46,258 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:46,352 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:41:46,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-11-02 20:41:46,765 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:46,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:47,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 19 [2022-11-02 20:41:47,132 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 29 treesize of output 25 [2022-11-02 20:41:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 0 proven. 318 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:47,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855337130] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:47,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:47,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 24] total 36 [2022-11-02 20:41:47,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908618357] [2022-11-02 20:41:47,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:47,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-02 20:41:47,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:47,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-02 20:41:47,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1144, Unknown=0, NotChecked=0, Total=1260 [2022-11-02 20:41:47,283 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 36 states have internal predecessors, (124), 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) [2022-11-02 20:41:49,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:49,220 INFO L93 Difference]: Finished difference Result 206 states and 209 transitions. [2022-11-02 20:41:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-02 20:41:49,225 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 36 states have internal predecessors, (124), 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 80 [2022-11-02 20:41:49,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:49,226 INFO L225 Difference]: With dead ends: 206 [2022-11-02 20:41:49,226 INFO L226 Difference]: Without dead ends: 204 [2022-11-02 20:41:49,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 140 SyntacticMatches, 8 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=299, Invalid=3991, Unknown=0, NotChecked=0, Total=4290 [2022-11-02 20:41:49,229 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 71 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 1959 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:49,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 876 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1959 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-02 20:41:49,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-11-02 20:41:49,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 105. [2022-11-02 20:41:49,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 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) [2022-11-02 20:41:49,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-11-02 20:41:49,268 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 80 [2022-11-02 20:41:49,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:49,268 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-11-02 20:41:49,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.4444444444444446) internal successors, (124), 36 states have internal predecessors, (124), 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) [2022-11-02 20:41:49,269 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-11-02 20:41:49,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-02 20:41:49,270 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:49,270 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:49,298 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:49,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-02 20:41:49,479 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:49,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash -103116603, now seen corresponding path program 19 times [2022-11-02 20:41:49,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:49,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99814697] [2022-11-02 20:41:49,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:49,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:49,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:50,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:50,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99814697] [2022-11-02 20:41:50,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99814697] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:50,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091912178] [2022-11-02 20:41:50,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 20:41:50,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:50,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:50,662 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:50,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-02 20:41:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:50,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 20:41:50,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:50,994 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:52,058 INFO L356 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-11-02 20:41:52,059 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 10 [2022-11-02 20:41:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:52,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:41:52,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:52,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 20 [2022-11-02 20:41:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:52,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091912178] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:41:52,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:41:52,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 48 [2022-11-02 20:41:52,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621476287] [2022-11-02 20:41:52,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:41:52,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-02 20:41:52,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:41:52,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-02 20:41:52,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2096, Unknown=0, NotChecked=0, Total=2256 [2022-11-02 20:41:52,934 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 48 states, 48 states have (on average 3.4791666666666665) internal successors, (167), 48 states have internal predecessors, (167), 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) [2022-11-02 20:41:56,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:41:56,329 INFO L93 Difference]: Finished difference Result 210 states and 214 transitions. [2022-11-02 20:41:56,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-02 20:41:56,329 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.4791666666666665) internal successors, (167), 48 states have internal predecessors, (167), 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 84 [2022-11-02 20:41:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:41:56,331 INFO L225 Difference]: With dead ends: 210 [2022-11-02 20:41:56,331 INFO L226 Difference]: Without dead ends: 208 [2022-11-02 20:41:56,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 141 SyntacticMatches, 12 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1985 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=467, Invalid=7189, Unknown=0, NotChecked=0, Total=7656 [2022-11-02 20:41:56,334 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 93 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 2586 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 2586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:41:56,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 1212 Invalid, 2744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 2586 Invalid, 0 Unknown, 96 Unchecked, 1.5s Time] [2022-11-02 20:41:56,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-11-02 20:41:56,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 113. [2022-11-02 20:41:56,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0446428571428572) internal successors, (117), 112 states have internal predecessors, (117), 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) [2022-11-02 20:41:56,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2022-11-02 20:41:56,376 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 84 [2022-11-02 20:41:56,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:41:56,376 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2022-11-02 20:41:56,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.4791666666666665) internal successors, (167), 48 states have internal predecessors, (167), 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) [2022-11-02 20:41:56,377 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2022-11-02 20:41:56,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-02 20:41:56,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:41:56,378 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:41:56,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-02 20:41:56,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:56,597 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:41:56,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:41:56,597 INFO L85 PathProgramCache]: Analyzing trace with hash 463415552, now seen corresponding path program 20 times [2022-11-02 20:41:56,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:41:56,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776416363] [2022-11-02 20:41:56,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:41:56,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:41:56,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:41:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:57,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:41:57,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776416363] [2022-11-02 20:41:57,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776416363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:41:57,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153755224] [2022-11-02 20:41:57,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:41:57,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:41:57,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:41:57,832 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:41:57,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-02 20:41:57,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:41:57,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:41:58,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-02 20:41:58,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:41:58,156 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:41:58,307 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-02 20:41:58,308 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-11-02 20:41:59,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 7 [2022-11-02 20:41:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:41:59,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:02,155 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_482| Int)) (or (forall ((v_ArrVal_1130 Int)) (< 8 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_482| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1130) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_482|)))) is different from false [2022-11-02 20:42:02,164 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 21 [2022-11-02 20:42:02,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 130 treesize of output 122 [2022-11-02 20:42:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 393 backedges. 0 proven. 383 refuted. 0 times theorem prover too weak. 0 trivial. 10 not checked. [2022-11-02 20:42:02,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153755224] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:02,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:42:02,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 26] total 52 [2022-11-02 20:42:02,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239562275] [2022-11-02 20:42:02,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:02,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-11-02 20:42:02,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:02,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-11-02 20:42:02,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2365, Unknown=1, NotChecked=98, Total=2652 [2022-11-02 20:42:02,375 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 52 states, 52 states have (on average 3.4423076923076925) internal successors, (179), 52 states have internal predecessors, (179), 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) [2022-11-02 20:42:05,405 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (= .cse0 36) (= 9 (select .cse1 (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|))) (forall ((|v_ULTIMATE.start_main_~i~0#1_482| Int)) (or (forall ((v_ArrVal_1130 Int)) (< 8 (select (store .cse1 (+ (* |v_ULTIMATE.start_main_~i~0#1_482| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1130) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_482|)))))) is different from false [2022-11-02 20:42:07,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:07,176 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2022-11-02 20:42:07,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-02 20:42:07,176 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.4423076923076925) internal successors, (179), 52 states have internal predecessors, (179), 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 88 [2022-11-02 20:42:07,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:07,178 INFO L225 Difference]: With dead ends: 214 [2022-11-02 20:42:07,179 INFO L226 Difference]: Without dead ends: 212 [2022-11-02 20:42:07,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 145 SyntacticMatches, 13 SemanticMatches, 82 ConstructedPredicates, 2 IntricatePredicates, 1 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=469, Invalid=6179, Unknown=2, NotChecked=322, Total=6972 [2022-11-02 20:42:07,181 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 109 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 1781 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:07,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 698 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1781 Invalid, 0 Unknown, 174 Unchecked, 1.0s Time] [2022-11-02 20:42:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-11-02 20:42:07,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 117. [2022-11-02 20:42:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0517241379310345) internal successors, (122), 116 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) [2022-11-02 20:42:07,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 122 transitions. [2022-11-02 20:42:07,234 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 122 transitions. Word has length 88 [2022-11-02 20:42:07,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:07,235 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 122 transitions. [2022-11-02 20:42:07,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.4423076923076925) internal successors, (179), 52 states have internal predecessors, (179), 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) [2022-11-02 20:42:07,235 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 122 transitions. [2022-11-02 20:42:07,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-02 20:42:07,236 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:07,236 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:07,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:07,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-02 20:42:07,451 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:07,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:07,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2110702651, now seen corresponding path program 21 times [2022-11-02 20:42:07,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:07,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003571054] [2022-11-02 20:42:07,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:07,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:07,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 163 proven. 227 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:08,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:08,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003571054] [2022-11-02 20:42:08,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003571054] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:08,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874572975] [2022-11-02 20:42:08,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:42:08,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:08,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:08,039 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:08,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-02 20:42:08,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-02 20:42:08,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:42:08,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:42:08,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:09,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 200 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:09,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874572975] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:09,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:42:09,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 37 [2022-11-02 20:42:09,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522640760] [2022-11-02 20:42:09,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:09,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-11-02 20:42:09,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:09,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-11-02 20:42:09,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2022-11-02 20:42:09,799 INFO L87 Difference]: Start difference. First operand 117 states and 122 transitions. Second operand has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 37 states have internal predecessors, (140), 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) [2022-11-02 20:42:10,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:10,840 INFO L93 Difference]: Finished difference Result 289 states and 294 transitions. [2022-11-02 20:42:10,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-02 20:42:10,841 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 37 states have internal predecessors, (140), 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 88 [2022-11-02 20:42:10,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:10,842 INFO L225 Difference]: With dead ends: 289 [2022-11-02 20:42:10,842 INFO L226 Difference]: Without dead ends: 143 [2022-11-02 20:42:10,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 142 SyntacticMatches, 21 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1778 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1045, Invalid=3925, Unknown=0, NotChecked=0, Total=4970 [2022-11-02 20:42:10,844 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 327 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:10,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 215 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 20:42:10,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-02 20:42:10,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 101. [2022-11-02 20:42:10,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 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) [2022-11-02 20:42:10,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-11-02 20:42:10,880 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 88 [2022-11-02 20:42:10,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:10,881 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-11-02 20:42:10,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.7837837837837838) internal successors, (140), 37 states have internal predecessors, (140), 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) [2022-11-02 20:42:10,881 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-11-02 20:42:10,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:42:10,882 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:10,882 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:10,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:11,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-02 20:42:11,111 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:11,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:11,111 INFO L85 PathProgramCache]: Analyzing trace with hash 479669179, now seen corresponding path program 22 times [2022-11-02 20:42:11,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:11,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806445020] [2022-11-02 20:42:11,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:11,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 438 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:12,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:12,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806445020] [2022-11-02 20:42:12,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806445020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:12,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200006823] [2022-11-02 20:42:12,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:42:12,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:12,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:12,627 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:12,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-02 20:42:13,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:42:13,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:42:13,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-02 20:42:13,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:13,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:42:13,688 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:42:13,689 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 treesize of output 25 [2022-11-02 20:42:13,709 INFO L356 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-02 20:42:13,710 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 24 [2022-11-02 20:42:13,777 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-02 20:42:13,778 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 25 treesize of output 30 [2022-11-02 20:42:15,160 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:42:15,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 30 treesize of output 20 [2022-11-02 20:42:15,225 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 2 proven. 436 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:15,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:16,766 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_1314 Int)) (or (not (<= |ULTIMATE.start_main_~i~0#1| v_ArrVal_1314)) (< |ULTIMATE.start_main_~i~0#1| 9) (< 8 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1314) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2022-11-02 20:42:25,551 WARN L833 $PredicateComparison]: unable to prove that (and (not (<= |c_ULTIMATE.start_main_~i~0#1| 8)) (forall ((|v_ULTIMATE.start_main_~i~0#1_567| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_567|)) (forall ((v_ArrVal_1310 Int)) (<= 9 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_567| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_1310) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))))))) is different from false [2022-11-02 20:42:25,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 36 treesize of output 34 [2022-11-02 20:42:25,580 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 69 treesize of output 65 [2022-11-02 20:42:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 0 proven. 394 refuted. 0 times theorem prover too weak. 0 trivial. 44 not checked. [2022-11-02 20:42:25,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200006823] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:25,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:42:25,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 29] total 56 [2022-11-02 20:42:25,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011974817] [2022-11-02 20:42:25,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:25,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-02 20:42:25,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:25,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-02 20:42:25,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=2610, Unknown=2, NotChecked=210, Total=3080 [2022-11-02 20:42:25,741 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 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) [2022-11-02 20:42:28,642 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (and (not (<= |c_ULTIMATE.start_main_~i~0#1| 8)) (= .cse0 36) (= (select .cse1 (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|)) |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_567| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_567|)) (forall ((v_ArrVal_1310 Int)) (<= 9 (select (store .cse1 (+ (* |v_ULTIMATE.start_main_~i~0#1_567| 4) |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_1310) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|)))))))) is different from false [2022-11-02 20:42:30,754 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (<= |c_ULTIMATE.start_main_~i~0#1| (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_1314 Int)) (or (not (<= |ULTIMATE.start_main_~i~0#1| v_ArrVal_1314)) (< |ULTIMATE.start_main_~i~0#1| 9) (< 8 (select (store .cse0 (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1314) .cse1)))) (<= 9 (select .cse0 .cse1)) (<= 10 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2022-11-02 20:42:31,476 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (<= |c_ULTIMATE.start_main_~i~0#1| (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (exists ((|ULTIMATE.start_main_~i~0#1| Int)) (and (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~SIZE~0)) (<= |ULTIMATE.start_main_~i~0#1| (select .cse0 (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))))) (not (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~SIZE~0)) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_1314 Int)) (or (not (<= |ULTIMATE.start_main_~i~0#1| v_ArrVal_1314)) (< |ULTIMATE.start_main_~i~0#1| 9) (< 8 (select (store .cse0 (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1314) .cse1)))) (<= 9 (select .cse0 .cse1)) (<= 10 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2022-11-02 20:42:32,192 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (not (= (* |c_ULTIMATE.start_main_~i~0#1| 4) 36)) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_1314 Int)) (or (not (<= |ULTIMATE.start_main_~i~0#1| v_ArrVal_1314)) (< |ULTIMATE.start_main_~i~0#1| 9) (< 8 (select (store .cse0 (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1314) .cse1)))) (<= 9 (select .cse0 .cse1)))) is different from false [2022-11-02 20:42:32,864 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (not (= (* |c_ULTIMATE.start_main_~i~0#1| 4) 36)) (exists ((|ULTIMATE.start_main_~i~0#1| Int)) (and (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~SIZE~0)) (<= |ULTIMATE.start_main_~i~0#1| (select .cse0 (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))))) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_1314 Int)) (or (not (<= |ULTIMATE.start_main_~i~0#1| v_ArrVal_1314)) (< |ULTIMATE.start_main_~i~0#1| 9) (< 8 (select (store .cse0 (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1314) .cse1)))) (<= 9 (select .cse0 .cse1)))) is different from false [2022-11-02 20:42:34,640 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (<= |c_ULTIMATE.start_main_~i~0#1| (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))) (exists ((|ULTIMATE.start_main_~i~0#1| Int)) (and (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~SIZE~0)) (<= |ULTIMATE.start_main_~i~0#1| (select .cse0 (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))))) (not (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~SIZE~0)) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_1314 Int)) (or (not (<= |ULTIMATE.start_main_~i~0#1| v_ArrVal_1314)) (< |ULTIMATE.start_main_~i~0#1| 9) (< 8 (select (store .cse0 (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1314) .cse1)))) (<= 9 (select .cse0 .cse1)))) is different from false [2022-11-02 20:42:35,329 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (exists ((|ULTIMATE.start_main_~i~0#1| Int)) (and (not (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~SIZE~0)) (<= |ULTIMATE.start_main_~i~0#1| (select .cse0 (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|))))) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (v_ArrVal_1314 Int)) (or (not (<= |ULTIMATE.start_main_~i~0#1| v_ArrVal_1314)) (< |ULTIMATE.start_main_~i~0#1| 9) (< 8 (select (store .cse0 (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1314) .cse1)))) (<= 9 (select .cse0 .cse1)))) is different from false [2022-11-02 20:42:36,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:36,028 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2022-11-02 20:42:36,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-02 20:42:36,030 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 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 92 [2022-11-02 20:42:36,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:36,031 INFO L225 Difference]: With dead ends: 185 [2022-11-02 20:42:36,031 INFO L226 Difference]: Without dead ends: 183 [2022-11-02 20:42:36,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 152 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=407, Invalid=4312, Unknown=9, NotChecked=1278, Total=6006 [2022-11-02 20:42:36,033 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 97 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 1202 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 342 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:36,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 574 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1202 Invalid, 0 Unknown, 342 Unchecked, 0.8s Time] [2022-11-02 20:42:36,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-11-02 20:42:36,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 105. [2022-11-02 20:42:36,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 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) [2022-11-02 20:42:36,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-11-02 20:42:36,093 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 92 [2022-11-02 20:42:36,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:36,094 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-11-02 20:42:36,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.357142857142857) internal successors, (188), 56 states have internal predecessors, (188), 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) [2022-11-02 20:42:36,094 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-11-02 20:42:36,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 20:42:36,095 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:36,095 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:36,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:36,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:36,323 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:36,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:36,323 INFO L85 PathProgramCache]: Analyzing trace with hash 2126956278, now seen corresponding path program 23 times [2022-11-02 20:42:36,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:36,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433476525] [2022-11-02 20:42:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:36,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:37,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:37,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433476525] [2022-11-02 20:42:37,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433476525] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:37,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026300530] [2022-11-02 20:42:37,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:42:37,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:37,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:37,641 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:37,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-02 20:42:38,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-11-02 20:42:38,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:42:38,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 20:42:38,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:38,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:42:39,013 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:42:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:39,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:39,335 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:42:39,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 24 treesize of output 20 [2022-11-02 20:42:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:39,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026300530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:42:39,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:42:39,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 39 [2022-11-02 20:42:39,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172135795] [2022-11-02 20:42:39,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:42:39,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-02 20:42:39,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:42:39,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-02 20:42:39,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1369, Unknown=0, NotChecked=0, Total=1482 [2022-11-02 20:42:39,519 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 39 states, 39 states have (on average 3.5641025641025643) internal successors, (139), 39 states have internal predecessors, (139), 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) [2022-11-02 20:42:41,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:42:41,787 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2022-11-02 20:42:41,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-02 20:42:41,788 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.5641025641025643) internal successors, (139), 39 states have internal predecessors, (139), 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 92 [2022-11-02 20:42:41,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:42:41,789 INFO L225 Difference]: With dead ends: 170 [2022-11-02 20:42:41,789 INFO L226 Difference]: Without dead ends: 168 [2022-11-02 20:42:41,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 165 SyntacticMatches, 7 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=326, Invalid=5224, Unknown=0, NotChecked=0, Total=5550 [2022-11-02 20:42:41,791 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 114 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 2068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:42:41,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 696 Invalid, 2068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-02 20:42:41,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-11-02 20:42:41,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 109. [2022-11-02 20:42:41,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 states have internal predecessors, (112), 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) [2022-11-02 20:42:41,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-11-02 20:42:41,834 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 92 [2022-11-02 20:42:41,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:42:41,834 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-11-02 20:42:41,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.5641025641025643) internal successors, (139), 39 states have internal predecessors, (139), 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) [2022-11-02 20:42:41,834 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-11-02 20:42:41,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-02 20:42:41,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:42:41,835 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:42:41,869 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-02 20:42:42,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:42,047 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:42:42,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:42:42,048 INFO L85 PathProgramCache]: Analyzing trace with hash 134830326, now seen corresponding path program 24 times [2022-11-02 20:42:42,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:42:42,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002750269] [2022-11-02 20:42:42,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:42:42,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:42:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:42:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 4 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:43,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:42:43,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002750269] [2022-11-02 20:42:43,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002750269] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:42:43,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245718113] [2022-11-02 20:42:43,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 20:42:43,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:42:43,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:42:43,906 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:42:43,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7aabc836-a263-4981-b42d-e276dad7617e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-02 20:42:45,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-11-02 20:42:45,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:42:45,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 60 conjunts are in the unsatisfiable core [2022-11-02 20:42:45,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:42:45,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:42:46,082 INFO L356 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2022-11-02 20:42:46,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-02 20:42:46,105 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-02 20:42:46,106 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-11-02 20:42:46,208 INFO L356 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2022-11-02 20:42:46,208 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 28 treesize of output 27 [2022-11-02 20:42:46,236 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-02 20:42:46,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-11-02 20:42:46,355 INFO L356 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-02 20:42:46,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 26 [2022-11-02 20:42:47,322 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 23 treesize of output 7 [2022-11-02 20:42:47,379 INFO L134 CoverageAnalysis]: Checked inductivity of 487 backedges. 10 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:42:47,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:42:50,195 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_653| Int)) (or (forall ((v_ArrVal_1519 Int)) (< 8 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_653| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1519) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_653|)))) is different from false [2022-11-02 20:42:57,712 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_654| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_653| Int) (v_ArrVal_1517 Int) (v_ArrVal_1519 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_654| 1) |v_ULTIMATE.start_main_~i~0#1_653|)) (< 8 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_654| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1517) (+ (* |v_ULTIMATE.start_main_~i~0#1_653| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1519) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_654|)))) is different from false [2022-11-02 20:42:59,684 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_653| Int) (v_ArrVal_1517 Int) (|v_ULTIMATE.start_main_~i~0#1_654| Int) (v_ArrVal_1519 Int) (v_ArrVal_1514 Int)) (or (< 8 (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1514) (+ (* |v_ULTIMATE.start_main_~i~0#1_654| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1517) (+ (* |v_ULTIMATE.start_main_~i~0#1_653| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1519) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_654| 1) |v_ULTIMATE.start_main_~i~0#1_653|)) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_654|)))) is different from false [2022-11-02 20:43:19,129 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_655| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_653| Int) (v_ArrVal_1517 Int) (|v_ULTIMATE.start_main_~i~0#1_654| Int) (v_ArrVal_1519 Int) (v_ArrVal_1512 Int) (v_ArrVal_1514 Int)) (or (< 8 (select (store (store (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_655| 4))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4 .cse0) v_ArrVal_1512) (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse0) v_ArrVal_1514)) (+ (* |v_ULTIMATE.start_main_~i~0#1_654| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1517) (+ (* |v_ULTIMATE.start_main_~i~0#1_653| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_1519) (+ 36 |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_654| 1) |v_ULTIMATE.start_main_~i~0#1_653|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_655| 1) |v_ULTIMATE.start_main_~i~0#1_654|)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_655|)))) is different from false [2022-11-02 20:43:19,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 43 [2022-11-02 20:43:19,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 2178 treesize of output 2162